CN107910835A - Phase sequence combined connection box easy to adjust and phase sequence method of adjustment - Google Patents
Phase sequence combined connection box easy to adjust and phase sequence method of adjustment Download PDFInfo
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- CN107910835A CN107910835A CN201710336204.6A CN201710336204A CN107910835A CN 107910835 A CN107910835 A CN 107910835A CN 201710336204 A CN201710336204 A CN 201710336204A CN 107910835 A CN107910835 A CN 107910835A
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- electric current
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- power connecting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Battery Mounting, Suspending (AREA)
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Abstract
A kind of phase sequence combined connection box easy to adjust, including：Junction box body, the terminal plate equipped with three voltage and current tagblocks and zero curve tagblock, the phase sequence changeover module being electrically connected respectively with first voltage and current tagblock and the 3rd voltage and current tagblock；First voltage and current tagblock and the 3rd voltage and current tagblock include connecing electrical component and changeover module respectively；Connecing electrical component includes：Voltage power connecting column, middle electric current power connecting column, left electric current power connecting column and right electric current power connecting column；Changeover module includes：Column is changed in voltage left cut, and column, left current switching column group and right current switching column group are changed in voltage right cut；Left current switching column group and right current switching column group changes column including electric current left cut respectively and column is changed in electric current right cut；Middle electric current power connecting column is electrically connected with right electric current power connecting column or is electrically connected with left electric current power connecting column.Do not influence user power utilization during phase sequence combined connection box adjustment phase sequence easy to adjust and voltage, the electrical connection of electric current be not easy to obscure security it is preferable.
Description
Technical field
The present invention relates to power domain, especially a kind of phase sequence combined connection box easy to adjust and phase sequence method of adjustment.
Background technology
Electric energy metering combined wiring box is primarily adapted for use in the phase three-wire three that need to be accessed through current transformer or three-phase and four-line electricity
Can measurement loop.Electric energy meter is by installing combined connection box and secondary circuit（Voltage secondary circuit and electric current secondary loop）Joint
Wiring, it is possible to achieve easily and safely ammeter is checked during live on-load and electriferous state under tear table, dress table open, to ensure
Electric current secondary loop open circuit and voltage secondary circuit short circuit are prevented in operating process, while can also avoid pulling down on-load switch and make
Economic loss caused by user has a power failure.A kind of electrical energy measurement of the disclosure of the invention of Chinese Patent Application No. CN201510591399.X
The terminal plate set in combined connection box, including junction box body and junction box body, the terminal plate are equipped with U, V, W phase voltage and electricity
Flow tagblock and zero curve tagblock；The electric current tagblock of U, V, W phase is arranged at voltage link block both sides.Traditional electric energy meter
Amount combined connection box, which exists when negative phase sequence mistake occurs in joint wiring, connects any two phase at electric energy meter tail, it is necessary to have a power failure
Line mutually brings to reach and adjusts into table phase sequence, and voltage when influencing user power utilization and exchanging wiring, that current line easily obscures security is poor
Deficiency, therefore, do not influence user power utilization and voltage, the electrical connection of electric current are not easy to obscure security when designing a kind of adjustment phase sequence
Preferable phase sequence combined connection box easy to adjust and phase sequence method of adjustment, become urgent problem to be solved.
The content of the invention
The purpose of the invention is to overcome current electric energy metering combined wiring box to exist when anti-phase occurs in joint wiring
Adjusted during sequence mistake, it is necessary to have a power failure and mutually bring to reach by the wiring of any two phase at electric energy meter tail into table phase sequence, influence user
Electric current, pressure-wire easily obscure the poor deficiency of security when electricity consumption and exchange wiring, there is provided do not influence to use during one kind adjustment phase sequence
Family electricity consumption and voltage, the electrical connection of electric current are not easy to obscure the preferable phase sequence of security combined connection box and phase sequence tune easy to adjust
Adjusting method.
The present invention concrete technical scheme be：
A kind of phase sequence combined connection box easy to adjust, including：Junction box body, in junction box body and is equipped with three voltage electricity
Flow the terminal plate of tagblock and zero curve tagblock；First voltage and current tagblock and the 3rd voltage and current tagblock
Include connecing electrical component and changeover module respectively；Connecing electrical component includes：Voltage power connecting column, middle electric current power connecting column, left electric current power connecting column
With right electric current power connecting column；Changeover module includes：Column is changed in voltage left cut, and column, left current switching column group and right electric current are changed in voltage right cut
Switch column group；Left current switching column group and right current switching column group changes column including electric current left cut respectively and column is changed in electric current right cut；In
Electric current power connecting column is electrically connected with right electric current power connecting column or is electrically connected with left electric current power connecting column；Phase sequence combined connection box easy to adjust
Further include：The phase sequence changeover module being electrically connected respectively with first voltage and current tagblock and the 3rd voltage and current tagblock.
Phase sequence combined connection box easy to adjust in use, the electrical component that connects is electrically connected with the mutual inductor of secondary circuit,
Changeover module is connected with electrical energy meter electricity, is cut by middle electric current power connecting column with what right electric current power connecting column or left electric current power connecting column were electrically connected
Change, performance loop and maintenance loop switch can be carried out；Phase sequence combined connection box easy to adjust is by switching voltage power connecting column
Being electrically connected or changing being electrically connected of column with voltage right cut, switch left electric current power connecting column and left current switching column for column is changed with voltage left cut
The electrical connection of column is changed in the electric current left cut of group or the electrical connection of column, the right electric current power connecting column of switching and right current switching column are changed in electric current right cut
The electrical connection of column is changed in the electric current left cut of group or the electrical connection of column is changed in electric current right cut, and through respectively at first voltage and current tagblock
The phase sequence changeover module switching being electrically connected with the 3rd voltage and current tagblock, does not influence user power utilization and electricity when adjusting phase sequence
Pressure, the electrical connection of electric current are not easy to obscure security preferable.
Preferably, the phase sequence changeover module includes：Six connecting lines being embedded in terminal plate, first voltage
The voltage phase modulation component and electric current phase modulation component that electric current tagblock and the 3rd voltage and current tagblock are respectively equipped with；First company
The voltage of column and the 3rd voltage and current tagblock is changed at wiring both ends with the voltage left cut of first voltage and current tagblock respectively
Column electrical connection is changed in right cut；Column and the 3rd are changed in voltage right cut of second connecting line both ends respectively with first voltage and current tagblock
Column electrical connection is changed in the voltage left cut of a voltage and current tagblock；3rd connecting line both ends respectively with first voltage and current wiring
The electric current of the left current switching column group of column and the 3rd voltage and current tagblock is changed in the electric current left cut of the left current switching column group of block
Column electrical connection is changed in right cut；The 4th connecting line both ends electricity with the left current switching column group of first voltage and current tagblock respectively
Column electrical connection is changed in the electric current left cut for the left current switching column group that column and the 3rd voltage and current tagblock are changed in stream right cut；5th company
Column and the 3rd voltage are changed in wiring both ends with the electric current left cut of the right current switching column group of first voltage and current tagblock respectively
Column electrical connection is changed in the electric current right cut of the right current switching column group of electric current tagblock；6th connecting line both ends respectively with first electricity
The right current switching of column and the 3rd voltage and current tagblock is changed in the electric current right cut of the right current switching column group of current voltage tagblock
Column electrical connection is changed in the electric current left cut of column group.Connecting line, which is embedded in terminal plate, makes wiring neat, easy-to-connect and reliable.
Preferably, the voltage phase modulation component includes：Two voltages connect battery plate, four trip bolts；Voltage connects electricity
Plate is equipped with longitudinal slot hole and the card slot of battery plate lower end perforation is connect on the downside of longitudinal slot hole and with voltage；The width of longitudinal slot hole and
The width of card slot is respectively greater than the diameter of trip bolt screw rod and less than the diameter of trip bolt afterbody；Column and electricity are changed in voltage left cut
Pressure right cut changes column and is respectively provided with screw hole on a voltage, and voltage power connecting column is equipped with two and the one-to-one voltage of screw hole in phase voltage
Lower screw hole；The screw rod of two trip bolts corresponds longitudinal slot hole that battery plate is connect through two voltages, and two trip bolts
Screw rod with two voltages screw hole correspond be threadedly coupled；First voltage connects the card slot and the one of voltage power connecting column of battery plate
Screw hole is opposite under a voltage, and second voltage connects the lower end of battery plate and voltage power connecting column departs from；The screw rod of another two trip bolt
Correspond and be threadedly coupled with screw hole under two voltages.Voltage connect battery plate be equipped with longitudinal slot hole and on the downside of longitudinal slot hole and with
Voltage connects the card slot of battery plate lower end perforation, connects battery plate positioned at upper or change positioned at the next position by voltage, realizes voltage
The handover operation of break-make is convenient and efficient.
Preferably, the electric current phase modulation component includes：Four electric currents being arranged in order connect battery plate, eight fixed spiral shells
Nail；Electric current connects the card slot that battery plate is equipped with longitudinal slot hole and the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with electric current；Longitudinal direction
The width of slot hole and the width of card slot are respectively greater than the diameter of fixing screws screw rod and less than the diameters of fixing screws afterbody；Two
Column is changed in the electric current left cut of power connecting column on electric current and electric current right cut changes column and is respectively provided with screw hole on an electric current, left electric current power connecting column and the right side
Electric current power connecting column is respectively provided with screw hole under two electric currents；The longitudinal direction that the screw rod of four fixing screws respectively connects battery plate through an electric current is long
Hole and with electric current screw hole correspond be threadedly coupled；First electric current connects the lower end of battery plate and left electric current power connecting column departs from, the
Two electric currents connect under the card slot of battery plate and an electric current of left electric current power connecting column that screw hole is opposite, and the 3rd electric current connects the card slot of battery plate
Opposite with screw hole under an electric current of right electric current power connecting column, the 4th electric current connects the lower end of battery plate and right electric current power connecting column departs from；
The screw rod of other four trip bolt is corresponded with screw hole under four electric currents and is threadedly coupled.Electric current connect battery plate be equipped with longitudinal slot hole and
The card slot of battery plate lower end perforation is connect on the downside of longitudinal slot hole and with electric current, battery plate is connect positioned at upper or positioned at bottom by electric current
Position change, realize that the handover operation of current switching is convenient and efficient.
Preferably, the middle electric current power connecting column is electrically connected by connection sheet with right electric current power connecting column or is connect with left electric current
Electric column is electrically connected by connection sheet.It is reliable to connect easy switching.
A kind of phase sequence method of adjustment of phase sequence combined connection box easy to adjust, easy to adjust the combining of the phase sequence connect
Wire box includes：Junction box body, in junction box body and the terminal plate equipped with three voltage and current tagblocks and zero curve tagblock；
First voltage and current tagblock and the 3rd voltage and current tagblock include connecing electrical component and changeover module respectively；Connect
Electrical component includes：Voltage power connecting column, middle electric current power connecting column, left electric current power connecting column and right electric current power connecting column；Changeover module includes：Electricity
Column is changed in pressure left cut, and column, left current switching column group and right current switching column group are changed in voltage right cut；Left current switching column group and right electric current
Switching column group changes column including electric current left cut respectively and column is changed in electric current right cut；Middle electric current power connecting column be electrically connected with right electric current power connecting column or
It is electrically connected with left electric current power connecting column；Phase sequence combined connection box easy to adjust further includes：Respectively with first voltage and current wiring
The phase sequence changeover module that block and the 3rd voltage and current tagblock are electrically connected；Phase sequence changeover module includes：Six are embedded in wiring
The voltage phase modulation component that connecting line in plate, first voltage and current tagblock and the 3rd voltage and current tagblock are respectively equipped with
With electric current phase modulation component；Column and the 3rd are changed in voltage left cut of first connecting line both ends respectively with first voltage and current tagblock
Column electrical connection is changed in the voltage right cut of a voltage and current tagblock；Second connecting line both ends respectively with first voltage and current wiring
Column is changed in the voltage right cut of block and column electrical connection is changed in the voltage left cut of the 3rd voltage and current tagblock；3rd connecting line both ends point
Column and the 3rd voltage and current tagblock are not changed with the electric current left cut of the left current switching column group of first voltage and current tagblock
Left current switching column group electric current right cut change column electrical connection；4th connecting line both ends respectively with first voltage and current wiring
The electric current of the left current switching column group of column and the 3rd voltage and current tagblock is changed in the electric current right cut of the left current switching column group of block
Column electrical connection is changed in left cut；The 5th connecting line both ends electricity with the right current switching column group of first voltage and current tagblock respectively
Column electrical connection is changed in the electric current right cut for the right current switching column group that column and the 3rd voltage and current tagblock are changed in stream left cut；6th company
Column and the 3rd voltage are changed in wiring both ends with the electric current right cut of the right current switching column group of first voltage and current tagblock respectively
Column electrical connection is changed in the electric current left cut of the right current switching column group of electric current tagblock；Voltage phase modulation component includes：Two voltages connect electricity
Plate, four trip bolts；Voltage connects battery plate and is equipped with longitudinal slot hole and on the downside of longitudinal slot hole and connects battery plate lower end with voltage and pass through
Logical card slot；The width of longitudinal slot hole and the width of card slot are respectively greater than the diameter of trip bolt screw rod and are less than trip bolt tail
The diameter in portion；Column is changed in voltage left cut and voltage right cut changes column and is respectively provided with screw hole on a voltage, voltage power connecting column be equipped with two with
Screw hole under the one-to-one voltage of screw hole in phase voltage；The screw rod of two trip bolts corresponds through two voltages and connects battery plate
Longitudinal slot hole, and the screw rod of two trip bolts with two voltages screw hole correspond be threadedly coupled；First voltage connects
The card slot of battery plate is opposite with screw hole under a voltage of voltage power connecting column, and second voltage connects lower end and the voltage power connecting column of battery plate
Depart from；The screw rod of another two trip bolt is corresponded with screw hole under two voltages and is threadedly coupled；Electric current phase modulation component includes：Four
A electric current being arranged in order connects battery plate, eight fixing screws；Electric current connects battery plate and is equipped with longitudinal slot hole and on the downside of longitudinal slot hole
And the card slot of battery plate lower end perforation is connect with electric current；The width of longitudinal slot hole and the width of card slot are respectively greater than fixing screws screw rod
Diameter and the diameter for being less than fixing screws afterbody；Column is changed in the electric current left cut of power connecting column on two electric currents and electric current right cut is changed column and respectively set
There is screw hole on an electric current, left electric current power connecting column and right electric current power connecting column are respectively provided with screw hole under two electric currents；Four fixing screws
Screw rod respectively through an electric current connect battery plate longitudinal slot hole and with electric current screw hole correspond be threadedly coupled；First electric current
The lower end and left electric current power connecting column for connecing battery plate depart from, and second electric current connects the card slot of battery plate and an electric current of left electric current power connecting column
Lower screw hole is opposite, and it is opposite that the 3rd electric current connects screw hole under the card slot of battery plate and an electric current of right electric current power connecting column, the 4th electricity
Stream connects the lower end of battery plate and right electric current power connecting column departs from；Screw hole corresponds under the screw rod of other four trip bolt and four electric currents
It is threadedly coupled.Electric current connects the card that battery plate is equipped with longitudinal slot hole and the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with electric current
Groove, connects battery plate positioned at upper or change positioned at the next position by electric current, realizes that the handover operation of current switching is convenient and efficient；
Middle electric current power connecting column is electrically connected by connection sheet with right electric current power connecting column or is electrically connected with left electric current power connecting column by connection sheet.Even
It is reliable to connect easy switching；The electrical component that connects is electrically connected with the mutual inductor of secondary circuit, and changeover module is connected with electrical energy meter electricity,
The switching being electrically connected by middle electric current power connecting column with right electric current power connecting column or left electric current power connecting column, can carry out performance loop and maintenance
Loop switch；Step 1, original state：First voltage of voltage phase modulation component connects battery plate positioned at the next and left with voltage respectively
Switch column and voltage power connecting column is electrically connected；Second voltage of voltage phase modulation component, which connects battery plate and is located at upper and voltage, connects battery plate
Lower end departs from voltage power connecting column；First electric current of electric current phase modulation component connects battery plate positioned at upper, and first electric current connects battery plate
Lower end and left electric current power connecting column depart from, second electric current connects battery plate positioned at bottom, second electric current connect battery plate respectively with left electricity
The electric current right cut of stream switching column group is changed column and left electric current power connecting column and is electrically connected, and the 3rd electric current connects battery plate positioned at bottom, the 3rd
Electric current connects that battery plate changes column with the electric current left cut of right current switching column group respectively and right electric current power connecting column is electrically connected, and the 4th electric current connects
Battery plate is positioned at upper, and the 4th electric current connects the lower end of battery plate and right electric current power connecting column departs from；Step 2, when joint wiring appearance is inverse
Phase sequence adjustment is carried out during phase sequence mistake：Second voltage of voltage phase modulation component connect battery plate positioned at it is the next and respectively with voltage right cut
Change column and voltage power connecting column is electrically connected；First voltage of voltage phase modulation component, which connects battery plate and is located at upper and voltage, to be connect under battery plate
End departs from voltage power connecting column；First electric current of electric current phase modulation component connects battery plate positioned at bottom, and first electric current connects battery plate point
Column is not changed with the electric current left cut of left current switching column group and left electric current power connecting column is electrically connected, second electric current connects battery plate positioned at upper
Position, second electric current connects the lower end of battery plate and left electric current power connecting column departs from, and the 3rd electric current connects battery plate and be located at upper, the 3rd electricity
Stream connects the lower end of battery plate and right electric current power connecting column departs from, and the 4th electric current connects battery plate positioned at bottom, and the 4th electric current connects battery plate point
Column is not changed with the electric current right cut of right current switching column group and right electric current power connecting column is electrically connected and completes phase sequence adjustment.Phase sequence is easy to adjust
Combined connection box phase sequence method of adjustment can meet not influence when adjusting phase sequence user power utilization and voltage, electric current electrical connection not
Easily obscuring security preferably needs.
Compared with prior art, the beneficial effects of the invention are as follows：Phase sequence combined connection box easy to adjust passes through switching
Voltage power connecting column and voltage left cut change column be electrically connected or with voltage right cut change being electrically connected of column, switch left electric current power connecting column with it is left
The electrical connection of column is changed in the electric current left cut of current switching column group or the electrical connection of column, the right electric current power connecting column of switching and the right side are changed in electric current right cut
The electrical connection of column is changed in the electric current left cut of current switching column group or the electrical connection of column is changed in electric current right cut, and through respectively at first voltage
The phase sequence changeover module switching that electric current tagblock and the 3rd voltage and current tagblock are electrically connected, does not influence user when adjusting phase sequence
Electricity consumption and voltage, the electrical connection of electric current are not easy to obscure security preferable.Connecting line, which is embedded in terminal plate, makes wiring neat, wiring
It is convenient and reliable.Voltage connects the card that battery plate is equipped with longitudinal slot hole and the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with voltage
Groove, connects battery plate positioned at upper or change positioned at the next position by voltage, realizes that the handover operation of voltage break-make is convenient and efficient.
Electric current connects the card slot that battery plate is equipped with longitudinal slot hole and the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with electric current, passes through electric current
Connect battery plate to be located at upper or positioned at the next position change, realize that the handover operation of current switching is convenient and efficient.Middle electric current connects electricity
Column is electrically connected by connection sheet with right electric current power connecting column or is electrically connected with left electric current power connecting column by connection sheet, connects easy switching
Reliably.The phase sequence method of adjustment of phase sequence combined connection box easy to adjust can meet not influencing user power utilization and electricity when adjusting phase sequence
Pressure, the electrical connection of electric current, which are not easy to obscure security, preferably to be needed.
Brief description of the drawings
Fig. 1 is a kind of original state structure diagram of the present invention；
Fig. 2 is the structure diagram of state after the adjustment of Fig. 1 phase sequences.
In figure：Junction box body 1, voltage and current tagblock 2, zero curve tagblock 3, terminal plate 4, voltage power connecting column 5, middle electric current
Power connecting column 6, left electric current power connecting column 7, right electric current power connecting column 8, column 9 is changed in voltage left cut, column 10 is changed in voltage right cut, left current switching column
Group 11, right current switching column group 12, column 13 is changed in electric current left cut, column 14 is changed in electric current right cut, connecting line 15, voltage connect battery plate 16, tight
Gu screw 17, longitudinal slot hole 18, card slot 19, electric current connect battery plate 20, fixing screws 21, connection sheet 22.
Embodiment
It is shown below in conjunction with the accompanying drawings that the present invention is described further.
As shown in attached drawing 1, attached drawing 2：A kind of phase sequence combined connection box easy to adjust, including：Junction box body 1, arranged on connecing
In wire box body 1 and the terminal plate 4 equipped with three voltage and current tagblocks 2 and zero curve tagblock 3；First voltage and current
Tagblock 2 and the 3rd voltage and current tagblock 2 include connecing electrical component and changeover module respectively；Connecing electrical component includes：Voltage connects
Electric column 5, middle electric current power connecting column 6, left electric current power connecting column 7 and right electric current power connecting column 8；Changeover module includes：Column 9 is changed in voltage left cut,
Column 10, left current switching column group 11 and right current switching column group 12 are changed in voltage right cut；Left current switching column group 11 and right electric current are cut
Change that column group 12 changes column 13 including electric current left cut respectively and column 14 is changed in electric current right cut；Middle electric current power connecting column 6 and the right electricity of electric current power connecting column 8
Connection is electrically connected with left electric current power connecting column 7；Phase sequence combined connection box easy to adjust further includes：Respectively with first voltage electricity
Flow the phase sequence changeover module that tagblock 2 and the 3rd voltage and current tagblock 2 are electrically connected.Voltage power connecting column 5, middle electric current power connecting column
6th, left electric current power connecting column 7, right electric current power connecting column 8, column 9 is changed in voltage left cut, column 10 is changed in voltage right cut, column 13 and electricity are changed in electric current left cut
The material that column 14 is changed in stream right cut is copper material.
The phase sequence changeover module includes：Six connecting lines 15 being embedded in terminal plate 4, first voltage and current connect
The voltage phase modulation component and electric current phase modulation component that line block 2 and the 3rd voltage and current tagblock 2 are respectively equipped with；First connecting line
The voltage of column 9 and the 3rd voltage and current tagblock 2 is changed at 15 both ends with the voltage left cut of first voltage and current tagblock 2 respectively
Right cut is changed column 10 and is welded；Column 10 is changed in voltage right cut of second 15 both ends of connecting line respectively with first voltage and current tagblock 2
Voltage left cut with the 3rd voltage and current tagblock 2 is changed column 9 and is welded；3rd 15 both ends of connecting line respectively with first voltage
The left electric current of column 13 and the 3rd voltage and current tagblock 2 is changed in the electric current left cut of the left current switching column group 11 of electric current tagblock 2
The electric current right cut of switching column group 11 is changed column 14 and is welded；4th 15 both ends of connecting line respectively with first voltage and current tagblock 2
The electric current right cut of left current switching column group 11 change the left current switching column group 11 of column 14 and the 3rd voltage and current tagblock 2
Electric current left cut is changed column 13 and is welded；5th 15 both ends of the connecting line right current switching with first voltage and current tagblock 2 respectively
Column is changed in the electric current right cut that the right current switching column group 12 of column 13 and the 3rd voltage and current tagblock 2 is changed in the electric current left cut of column group 12
14 welding；6th 15 both ends of the connecting line electric current with the right current switching column group 12 of first voltage and current tagblock 2 respectively
The electric current left cut that the right current switching column group 12 of column 14 and the 3rd voltage and current tagblock 2 is changed in right cut is changed column 13 and is welded.
The voltage phase modulation component includes：Two voltages connect battery plate 16, four trip bolts 17；Voltage connects battery plate 16 and sets
There is longitudinal slot hole 18 and the card slot 19 of 16 lower end of battery plate perforation is connect positioned at longitudinal downside of slot hole 18 and with voltage；Longitudinal slot hole 18
The width of width and card slot 19 is respectively greater than the diameter of 17 screw rod of trip bolt and less than the diameter of 17 afterbody of trip bolt；Voltage
Column 9 is changed in left cut and voltage right cut changes column 10 and is respectively provided with screw hole on a voltage（It is not drawn into attached drawing）, voltage power connecting column 5 is equipped with two
Screw hole under the one-to-one voltage of screw hole in a and phase voltage（It is not drawn into attached drawing）；The screw rod one of two trip bolts 17 is a pair of
Two voltages should be passed through to connect longitudinal slot hole 18 of battery plate 16, and screw hole is one by one on the screw rod and two voltages of two trip bolts 17
It is corresponding to be threadedly coupled；It is opposite that first voltage connects screw hole under the card slot 19 of battery plate 16 and a voltage of voltage power connecting column 5, and second
A voltage connects the lower end of battery plate 16 and voltage power connecting column 5 departs from；Screw hole under the screw rod of another two trip bolt 17 and two voltages
Correspond and be threadedly coupled.The shape that voltage connects battery plate 16 is rectangle.
The electric current phase modulation component includes：Four electric currents being arranged in order connect battery plate 20, eight fixing screws 21；Electric current
Connect the card slot 19 that battery plate 20 is equipped with longitudinal slot hole 18 and the perforation of 20 lower end of battery plate is connect positioned at longitudinal downside of slot hole 18 and with electric current；It is vertical
The width of width and card slot 19 to slot hole 18 is respectively greater than the diameter of 21 screw rod of fixing screws and is less than 21 afterbody of fixing screws
Diameter；Column 13 is changed in the electric current left cut of power connecting column on two electric currents and electric current right cut changes column 14 and is respectively provided with screw hole on an electric current
（It is not drawn into attached drawing）, left electric current power connecting column 7 and right electric current power connecting column 8 are respectively provided with screw hole under two electric currents（Do not drawn in attached drawing
Go out）；The screw rod of four fixing screws 21 respectively through an electric current connect longitudinal slot hole 18 of battery plate 20 and with screw hole on electric current one by one
It is corresponding to be threadedly coupled；First electric current connects the lower end of battery plate 20 and left electric current power connecting column 7 departs from, and second electric current connects battery plate 20
Card slot 19 is opposite with screw hole under an electric current of left electric current power connecting column 7, and the 3rd electric current connects the card slot 19 of battery plate 20 and right electric current
Screw hole is opposite under one electric current of power connecting column 8, and the 4th electric current connects the lower end of battery plate 20 and right electric current power connecting column 8 departs from；Another four
The screw rod of a trip bolt 17 is corresponded with screw hole under four electric currents and is threadedly coupled.The shape that electric current connects battery plate 20 is rectangle.
The middle electric current power connecting column 6 be electrically connected with right electric current power connecting column 8 by connection sheet 22 or with left electric current power connecting column 7
It is electrically connected by connection sheet 22.
A kind of phase sequence method of adjustment of phase sequence combined connection box easy to adjust, easy to adjust the combining of the phase sequence connect
Wire box includes：Junction box body 1, connecing in junction box body 1 and equipped with three voltage and current tagblocks 2 and zero curve tagblock 3
Line plate 4；First voltage and current tagblock 2 and the 3rd voltage and current tagblock 2 include connecing electrical component respectively and cut
Change component；Connecing electrical component includes：Voltage power connecting column 5, middle electric current power connecting column 6, left electric current power connecting column 7 and right electric current power connecting column 8；Cut
Changing component includes：Column 9 is changed in voltage left cut, and column 10, left current switching column group 11 and right current switching column group 12 are changed in voltage right cut；It is left
Current switching column group 11 and right current switching column group 12 changes column 13 including electric current left cut respectively and column 14 is changed in electric current right cut；Middle electric current
Power connecting column 6 is electrically connected with right electric current power connecting column 8 or is electrically connected with left electric current power connecting column 7；Phase sequence combined connection box easy to adjust
Further include：The phase sequence switch groups being electrically connected respectively with first voltage and current tagblock 2 and the 3rd voltage and current tagblock 2
Part.Column 9, the voltage right side are changed in voltage power connecting column 5, middle electric current power connecting column 6, left electric current power connecting column 7, right electric current power connecting column 8, voltage left cut
Column 13 is changed in switching column 10, electric current left cut and electric current right cut to change the material of column 14 be copper material；Phase sequence changeover module includes：Six edges
Connecting line 15 in terminal plate 4, first voltage and current tagblock 2 and the 3rd voltage and current tagblock 2 are respectively equipped with
Voltage phase modulation component and electric current phase modulation component；First 15 both ends of connecting line respectively with first voltage and current tagblock 2
The voltage right cut that column 9 and the 3rd voltage and current tagblock 2 are changed in voltage left cut is changed column 10 and is welded；Second 15 both ends of connecting line point
The voltage left cut that column 10 and the 3rd voltage and current tagblock 2 are not changed with the voltage right cut of first voltage and current tagblock 2 is changed
Column 9 welds；3rd 15 both ends of the connecting line electric current with the left current switching column group 11 of first voltage and current tagblock 2 respectively
The electric current right cut that the left current switching column group 11 of column 13 and the 3rd voltage and current tagblock 2 is changed in left cut is changed column 14 and is welded；4th
A 15 both ends of connecting line changed respectively with the electric current right cut of the left current switching column group 11 of first voltage and current tagblock 2 column 14 and
The electric current left cut of the left current switching column group 11 of 3rd voltage and current tagblock 2 is changed column 13 and is welded；5th 15 liang of connecting line
The electric current left cut respectively with the right current switching column group 12 of first voltage and current tagblock 2 is held to change column 13 and the 3rd voltage electricity
The electric current right cut of the right current switching column group 12 of stream tagblock 2 is changed column 14 and is welded；6th 15 both ends of connecting line are respectively with first
Column 14 and the 3rd voltage and current tagblock 2 are changed in the electric current right cut of the right current switching column group 12 of a voltage and current tagblock 2
The electric current left cut of right current switching column group 12 is changed column 13 and is welded；Voltage phase modulation component includes：Two voltages connect battery plate 16, and four tight
Gu screw 17；Voltage connects battery plate 16 and is equipped with longitudinal slot hole 18 and positioned at longitudinal downside of slot hole 18 and connects 16 lower end of battery plate with voltage and pass through
Logical card slot 19；The width of longitudinal slot hole 18 and the width of card slot 19 are respectively greater than the diameter of 17 screw rod of trip bolt and less than tight
Gu the diameter of 17 afterbody of screw；Column 9 is changed in voltage left cut and voltage right cut changes column 10 and is respectively provided with screw hole on a voltage, and voltage connects electricity
Column 5 is equipped with two and screw hole under the one-to-one voltage of screw hole in phase voltage；The screw rod of two trip bolts 17 is corresponded and worn
Longitudinal slot hole 18 that two voltages connect battery plate 16 is crossed, and screw hole corresponds on the screw rod and two voltages of two trip bolts 17
It is threadedly coupled；It is opposite that first voltage connects screw hole under the card slot 19 of battery plate 16 and a voltage of voltage power connecting column 5, second electricity
The lower end of crimping battery plate 16 departs from voltage power connecting column 5；Screw hole is one by one under the screw rod of another two trip bolt 17 and two voltages
It is corresponding to be threadedly coupled.The shape that voltage connects battery plate 16 is rectangle；Electric current phase modulation component includes：Four electric currents being arranged in order connect electricity
Plate 20, eight fixing screws 21；Electric current connects battery plate 20 and is equipped with longitudinal slot hole 18 and is connect on the downside of longitudinal slot hole 18 and with electric current
The card slot 19 of 20 lower end of battery plate perforation；The width of longitudinal slot hole 18 and the width of card slot 19 are respectively greater than 21 screw rod of fixing screws
Diameter and the diameter for being less than 21 afterbody of fixing screws；Column 13 is changed in the electric current left cut of power connecting column on two electric currents and column is changed in electric current right cut
14 are respectively provided with screw hole on an electric current, and left electric current power connecting column 7 and right electric current power connecting column 8 are respectively provided with screw hole under two electric currents；Four
The screw rod of fixing screws 21 respectively connects longitudinal slot hole 18 of battery plate 20 through an electric current and corresponds screw thread with screw hole on electric current
Connection；First electric current connects the lower end of battery plate 20 and left electric current power connecting column 7 departs from, second electric current connect the card slot 19 of battery plate 20 with
Screw hole is opposite under one electric current of left electric current power connecting column 7, and the 3rd electric current connects the card slot 19 of battery plate 20 and right electric current power connecting column 8
Screw hole is opposite under one electric current, and the 4th electric current connects the lower end of battery plate 20 and right electric current power connecting column 8 departs from；Other four trip bolt
17 screw rod is corresponded with screw hole under four electric currents and is threadedly coupled.The shape that electric current connects battery plate 20 is rectangle；Middle electric current connects electricity
Column 6 is electrically connected by connection sheet 22 with right electric current power connecting column 8 or is electrically connected with left electric current power connecting column 7 by connection sheet 22；It is described
The electrical component that connects be electrically connected with the mutual inductor of secondary circuit, changeover module is connected with electrical energy meter electricity, by middle electric current power connecting column 6 with
The switching that right electric current power connecting column 8 or left electric current power connecting column 7 are electrically connected, can carry out performance loop and maintenance loop switch；Step 1,
Original state：First voltage of voltage phase modulation component connects battery plate 16 positioned at bottom and changes column 9 and voltage with voltage left cut respectively
Power connecting column 5 is electrically connected；Second voltage of voltage phase modulation component connect battery plate 16 be located at upper and voltage connect the lower end of battery plate 16 with
Voltage power connecting column 5 departs from；First electric current of electric current phase modulation component connects battery plate 20 positioned at upper, and first electric current connects battery plate 20
Lower end departs from left electric current power connecting column 7, second electric current connect battery plate 20 positioned at bottom, second electric current connect battery plate 20 respectively with a left side
Column 14 is changed in the electric current right cut of current switching column group 11 and left electric current power connecting column 7 is electrically connected, and the 3rd electric current is connect under battery plate 20 is located at
Position, the 3rd electric current connect battery plate 20 and change column 13 and the electricity of right electric current power connecting column 8 with the electric current left cut of right current switching column group 12 respectively
Connection, the 4th electric current connect battery plate 20 positioned at upper, and the 4th electric current connects the lower end of battery plate 20 and right electric current power connecting column 8 departs from；
Step 2, phase sequence adjustment is carried out when negative phase sequence mistake occurs in joint wiring：Second voltage of voltage phase modulation component connects battery plate
16 positioned at the next and change column 10 with voltage right cut respectively and voltage power connecting column 5 is electrically connected；First voltage of voltage phase modulation component
Connect battery plate 16 and be located at that upper and voltage connects the lower end of battery plate 16 and voltage power connecting column 5 departs from；First electricity of electric current phase modulation component
Stream connect battery plate 20 positioned at bottom, first electric current connect battery plate 20 changed respectively with the electric current left cut of left current switching column group 11 column 13 and
Left electric current power connecting column 7 is electrically connected, and second electric current connects battery plate 20 positioned at upper, and second electric current connects the lower end of battery plate 20 and left electricity
Stream power connecting column 7 departs from, and the 3rd electric current connects battery plate 20 positioned at upper, and the 3rd electric current connects the lower end of battery plate 20 and right electric current connects electricity
Column 8 departs from, the 4th electric current connect battery plate 20 positioned at bottom, the 4th electric current connect battery plate 20 respectively with right current switching column group 12
Column 14 is changed in electric current right cut and right electric current power connecting column 8 is electrically connected and completes phase sequence adjustment.
The beneficial effects of the invention are as follows：Phase sequence combined connection box easy to adjust is by switching voltage power connecting column and voltage
Left cut changes the electrical connection of column or changes being electrically connected of column with voltage right cut, switches left electric current power connecting column and the electricity of left current switching column group
The electrical connection of column is changed in stream left cut or the electrical connection of column, the right electric current power connecting column of switching and the electricity of right current switching column group are changed in electric current right cut
The electrical connection of column is changed in stream left cut or the electrical connection of column is changed in electric current right cut, and through respectively at first voltage and current tagblock and the 3rd
The phase sequence changeover module switching that a voltage and current tagblock is electrically connected, does not influence user power utilization and voltage, electric current when adjusting phase sequence
Electrical connection be not easy to obscure security it is preferable.Connecting line, which is embedded in terminal plate, makes wiring neat, easy-to-connect and reliable.Voltage
The card slot that battery plate is equipped with longitudinal slot hole and the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with voltage is connect, electricity is connect by voltage
Plate is located at upper or changes positioned at the next position, realizes that the handover operation of voltage break-make is convenient and efficient.Electric current connects battery plate and is equipped with
Longitudinal slot hole and the card slot that the perforation of battery plate lower end is connect on the downside of longitudinal slot hole and with electric current, battery plate is connect positioned at upper by electric current
Or change positioned at the next position, realize that the handover operation of current switching is convenient and efficient.Middle electric current power connecting column connects electricity with right electric current
Column is electrically connected by connection sheet or is electrically connected with left electric current power connecting column by connection sheet, and connection easy switching is reliable.Phase sequence adjusts
The phase sequence method of adjustment of convenient combined connection box can meet not influence user power utilization and voltage when adjusting phase sequence, electric current is electrically connected
Connecing to be not easy to obscure security preferably needs.
The present invention can change into that various ways are apparent to one skilled in the art, and such change is not considered as
Depart from the scope of the present invention.All such technical staff to the field obviously change, and are included within this right
Within the scope of it is required that.
Claims (6)
1. a kind of phase sequence combined connection box easy to adjust, including：Junction box body, in junction box body and is equipped with three voltages
The terminal plate of electric current tagblock and zero curve tagblock；It is characterized in that first voltage and current tagblock and the 3rd electricity
Current voltage tagblock includes connecing electrical component and changeover module respectively；Connecing electrical component includes：Voltage power connecting column, middle electric current power connecting column,
Left electric current power connecting column and right electric current power connecting column；Changeover module includes：Column is changed in voltage left cut, and column, left current switching are changed in voltage right cut
Column group and right current switching column group；Left current switching column group and right current switching column group change column and electric current including electric current left cut respectively
Column is changed in right cut；Middle electric current power connecting column is electrically connected with right electric current power connecting column or is electrically connected with left electric current power connecting column；Phase sequence is easy to adjust
Combined connection box further include：The phase being electrically connected respectively with first voltage and current tagblock and the 3rd voltage and current tagblock
Sequence changeover module.
2. phase sequence according to claim 1 combined connection box easy to adjust, it is characterized in that, the phase sequence changeover module
Including：Six connecting lines being embedded in terminal plate, first voltage and current tagblock and the 3rd voltage and current tagblock point
The voltage phase modulation component and electric current phase modulation component not being equipped with；First connecting line both ends respectively with first voltage and current tagblock
Voltage left cut change the voltage right cut of column and the 3rd voltage and current tagblock and change column electrical connection；Second connecting line both ends difference
The voltage left cut that column and the 3rd voltage and current tagblock are changed in voltage right cut with first voltage and current tagblock changes column and is electrically connected
Connect；3rd connecting line both ends changed respectively with the electric current left cut of the left current switching column group of first voltage and current tagblock column and
Column electrical connection is changed in the electric current right cut of the left current switching column group of 3rd voltage and current tagblock；4th connecting line both ends difference
Column and the 3rd voltage and current tagblock are changed in electric current right cut with the left current switching column group of first voltage and current tagblock
Column electrical connection is changed in the electric current left cut of left current switching column group；5th connecting line both ends respectively with first voltage and current tagblock
Right current switching column group the electric current left cut right current switching column group of changing column and the 3rd voltage and current tagblock electric current it is right
Switch column to be electrically connected；The 6th connecting line both ends electric current with the right current switching column group of first voltage and current tagblock respectively
Column electrical connection is changed in the electric current left cut that the right current switching column group of column and the 3rd voltage and current tagblock is changed in right cut.
3. phase sequence according to claim 2 combined connection box easy to adjust, it is characterized in that, the voltage phase modulation component
Including：Two voltages connect battery plate, four trip bolts；Voltage connect battery plate be equipped with longitudinal slot hole and on the downside of longitudinal slot hole and with
Voltage connects the card slot of battery plate lower end perforation；The width of longitudinal slot hole and the width of card slot are respectively greater than the diameter of trip bolt screw rod
And less than the diameter of trip bolt afterbody；Column is changed in voltage left cut and voltage right cut changes column and is respectively provided with screw hole on a voltage, voltage
Power connecting column is equipped with two and screw hole under the one-to-one voltage of screw hole in phase voltage；The screw rod of two trip bolts is corresponded and worn
Longitudinal slot hole that two voltages connect battery plate is crossed, and screw hole corresponds screw thread company on the screw rod and two voltages of two trip bolts
Connect；First voltage connects under the card slot of battery plate and a voltage of voltage power connecting column that screw hole is opposite, and second voltage connects battery plate
Lower end departs from voltage power connecting column；The screw rod of another two trip bolt is corresponded with screw hole under two voltages and is threadedly coupled.
4. phase sequence according to claim 2 combined connection box easy to adjust, it is characterized in that, the electric current phase modulation component
Including：Four electric currents being arranged in order connect battery plate, eight fixing screws；Electric current connects battery plate and is equipped with longitudinal slot hole and positioned at longitudinal length
The card slot of battery plate lower end perforation is connect on the downside of hole and with electric current；The width of longitudinal slot hole and the width of card slot are respectively greater than fixing screws
The diameter of screw rod and the diameter for being less than fixing screws afterbody；Column is changed in the electric current left cut of power connecting column on two electric currents and electric current right cut is changed
Column is respectively provided with screw hole on an electric current, and left electric current power connecting column and right electric current power connecting column are respectively provided with screw hole under two electric currents；Four solid
The screw rod for determining screw respectively connects longitudinal slot hole of battery plate through an electric current and is threadedly coupled with screw hole one-to-one corresponding on electric current；First
A electric current connects the lower end of battery plate and left electric current power connecting column departs from, and second electric current connects the card slot and the one of left electric current power connecting column of battery plate
Screw hole is opposite under a electric current, and it is opposite that the 3rd electric current connects screw hole under the card slot of battery plate and an electric current of right electric current power connecting column, and
Four electric currents connect the lower end of battery plate and right electric current power connecting column departs from；Screw hole one under the screw rod of other four trip bolt and four electric currents
One corresponds to threaded connection.
5. phase sequence according to claim 1 or 2 or 3 or 4 combined connection box easy to adjust, it is characterized in that, in described
Electric current power connecting column is electrically connected by connection sheet with right electric current power connecting column or is electrically connected with left electric current power connecting column by connection sheet.
6. a kind of phase sequence method of adjustment of phase sequence combined connection box easy to adjust, phase sequence joint wiring easy to adjust
Box has claim 1 to the limiting structure of the combined connection box easy to adjust of the phase sequence described in claim 6；Described connects electricity
Component is electrically connected with the mutual inductor of secondary circuit, and changeover module is connected with electrical energy meter electricity, passes through middle electric current power connecting column and right electric current
The switching that power connecting column or left electric current power connecting column are electrically connected, can carry out performance loop and maintenance loop switch；It is characterized in that step
One, original state：First voltage of voltage phase modulation component connects battery plate positioned at bottom and changes column and voltage with voltage left cut respectively
Power connecting column is electrically connected；Second voltage of voltage phase modulation component connects battery plate and is located at that upper and voltage connects the lower end of battery plate and voltage connects
Electric column departs from；First electric current of electric current phase modulation component connects battery plate positioned at upper, and first electric current connects the lower end of battery plate and left electricity
Flow power connecting column depart from, second electric current connect battery plate positioned at bottom, second electric current connect battery plate respectively with left current switching column group
Column is changed in electric current right cut and left electric current power connecting column is electrically connected, and the 3rd electric current connects battery plate positioned at bottom, and the 3rd electric current connects battery plate point
Column is not changed with the electric current left cut of right current switching column group and right electric current power connecting column is electrically connected, the 4th electric current connects battery plate positioned at upper
Position, the 4th electric current connects the lower end of battery plate and right electric current power connecting column departs from；Step 2, when negative phase sequence mistake occurs in joint wiring
Carry out phase sequence adjustment：Second voltage of voltage phase modulation component connects battery plate positioned at bottom and changes column and voltage with voltage right cut respectively
Power connecting column is electrically connected；First voltage of voltage phase modulation component connects battery plate and is located at that upper and voltage connects the lower end of battery plate and voltage connects
Electric column departs from；First electric current of electric current phase modulation component connect battery plate positioned at bottom, first electric current connect battery plate respectively with left electric current
Column is changed in the electric current left cut of switching column group and left electric current power connecting column is electrically connected, and second electric current connects battery plate and be located at upper, second electricity
Stream connects the lower end of battery plate and departs from left electric current power connecting column, and the 3rd electric current connects battery plate positioned at upper, and the 3rd electric current connects battery plate
Lower end and right electric current power connecting column depart from, and the 4th electric current connects battery plate positioned at bottom, the 4th electric current connect battery plate respectively with right electric current
Column is changed in the electric current right cut of switching column group and right electric current power connecting column is electrically connected and completes phase sequence adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336204.6A CN107910835B (en) | 2017-05-12 | 2017-05-12 | Phase sequence combined connection box easy to adjust and phase sequence method of adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336204.6A CN107910835B (en) | 2017-05-12 | 2017-05-12 | Phase sequence combined connection box easy to adjust and phase sequence method of adjustment |
Publications (2)
| Publication Number | Publication Date |
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| CN107910835A true CN107910835A (en) | 2018-04-13 |
| CN107910835B CN107910835B (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710336204.6A Active CN107910835B (en) | 2017-05-12 | 2017-05-12 | Phase sequence combined connection box easy to adjust and phase sequence method of adjustment |
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| CN (1) | CN107910835B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387805A (en) * | 2018-10-24 | 2019-02-26 | 国网山东省电力公司海阳市供电公司 | A kind of terminal box of three-level metering device series wiring band scene series connection verifying function |
| CN112290491A (en) * | 2020-10-10 | 2021-01-29 | 广东电网有限责任公司清远供电局 | Electric energy measurement is joint terminal box and is prevented mistake and touch insulator arrangement |
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| CN2430801Y (en) * | 2000-05-31 | 2001-05-16 | 陈敬樾 | Connection box for single or three phase user's line |
| CN201966555U (en) * | 2011-03-22 | 2011-09-07 | 广东俊朗松田电器有限公司 | Combined cover type distribution box |
| CN102474086A (en) * | 2009-07-10 | 2012-05-23 | 住友电装株式会社 | Electrical junction box and relay module |
| CN203607787U (en) * | 2013-11-20 | 2014-05-21 | 广东美的制冷设备有限公司 | Terminal box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2430801Y (en) * | 2000-05-31 | 2001-05-16 | 陈敬樾 | Connection box for single or three phase user's line |
| CN102474086A (en) * | 2009-07-10 | 2012-05-23 | 住友电装株式会社 | Electrical junction box and relay module |
| CN201966555U (en) * | 2011-03-22 | 2011-09-07 | 广东俊朗松田电器有限公司 | Combined cover type distribution box |
| CN203607787U (en) * | 2013-11-20 | 2014-05-21 | 广东美的制冷设备有限公司 | Terminal box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109387805A (en) * | 2018-10-24 | 2019-02-26 | 国网山东省电力公司海阳市供电公司 | A kind of terminal box of three-level metering device series wiring band scene series connection verifying function |
| CN112290491A (en) * | 2020-10-10 | 2021-01-29 | 广东电网有限责任公司清远供电局 | Electric energy measurement is joint terminal box and is prevented mistake and touch insulator arrangement |
| CN112290491B (en) * | 2020-10-10 | 2022-01-18 | 广东电网有限责任公司清远供电局 | Electric energy measurement is joint terminal box and is prevented mistake and touch insulator arrangement |
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| Publication number | Publication date |
|---|---|
| CN107910835B (en) | 2019-08-02 |
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