CN105929300A - Differential circuit detection voltage and power output box - Google Patents
Differential circuit detection voltage and power output box Download PDFInfo
- Publication number
- CN105929300A CN105929300A CN201610236779.6A CN201610236779A CN105929300A CN 105929300 A CN105929300 A CN 105929300A CN 201610236779 A CN201610236779 A CN 201610236779A CN 105929300 A CN105929300 A CN 105929300A
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- phase
- voltage
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- electric appliance
- appliance box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
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Abstract
The invention provides a differential circuit detection voltage and power output box, and the box comprises an electric appliance box, single-phase air switches, a three-phase four-line switch, a current amplifier, a voltage regulator, and a voltage phase conversion switch. The voltage regulator and the voltage phase conversion switch are respectively disposed on the top cover of the electric appliance box. The three-phase four-line switch is fixed on a rear side wall of the electric appliance box, and is adjacent to the voltage phase conversion switch. Three single-phase air switches are disposed below a right side of the rear side wall of the electric appliance box. Three current amplifiers are respectively disposed above three single-phase air switches, and are corresponding to the single-phase air switches in a one-to-one manner. The top cover of the electric appliance box is provided with three groups of current output terminals, a group of voltage output terminals, and a group of power input terminals. During the detection of a differential circuit, the box can directly detect the differential circuit with disassembly, simplifies the detection process of the circuit, and improves the work efficiency.
Description
Technical field
The present invention relates to a kind of electric equipment auxiliary detection device, particularly relate to a kind of differential circuit detection electricity
Pressure, power supply delivery casing.
Background technology
In the circuit connection, process of the test of transforming plant main transformer differential protection, in order to verify the correct of loop
Property, need the wiring of differential protection cabinet and main transformer inlet wire side CT (current transformer) is detected, tried
Testing, to guarantee after putting into operation, protective loop can detect the voltage and current amount of correct value and angle,
Owing to this loop is complicated, causing detection work the most loaded down with trivial details, existing common detection methods is to be torn open in loop
After solution testing each several part, the correctness for protection cabinet carries out test usually employing relay guarantor
Protecting tester to test, the mensuration for CT polarity is usually employing battery short circuit CT primary side combination
Pointer multimeter or test by Testing Instrument for Volt-ampere Characteristic, when above-mentioned two testing procedure completes after closely
Seemingly think that circuit connection is correct.
But, after using the test confirmation of above-mentioned method of testing errorless, after some equipment investments run,
Discovering device still suffers from wiring error problem, causes above-mentioned conventional method detection success the most very
Reason be: conventional detection method is when detection, it is impossible to apply tested differential protection cabinet simultaneously
The test voltage of one voltage reference angle and may determine that and this benchmark electricity in the input of this loop CT primary side
Pressure determines the big electric current (this electric current varies in size according to CT and requires difference, typically will not be less than 200A) of angle,
Being forced in detection to disassemble loop is divided into several part to detect respectively, and each several part is approximately considered after having detected
Whole circuit connection is correct, and cannot judge the wiring error after the connection of whole loop.
Summary of the invention
It is an object of the invention to provide a kind of differential circuit detection voltage, power supply delivery casing, this delivery casing
Can be able to can carry out providing one for differential protection cabinet under conditions of not disassembling whole loop
The reference voltage of 120 ° of conversions simultaneously, provides the big electricity of and reference voltage equal angular for CT loop
Stream, thus in the case of differential protection loop not being disassembled, from protection cabinet side and inlet wire CT mono-
Whole loop is detected by secondary property.
The present invention solves its technical problem and is adopted the technical scheme that: a kind of differential circuit detection voltage,
Power supply delivery casing, including electric appliance box, is characterized in that, this delivery casing also include single-phase sky open, three-phase and four-line
Switch, current amplifier, pressure regulator and voltage-phase change-over switch, described pressure regulator and voltage-phase turn
Changing switch to be arranged on the upper top cover of described electric appliance box, described three-phase and four-line switch is fixedly installed on described
On the rear wall of electric appliance box and adjacent with described voltage-phase change-over switch, three described single-phase skies are offered
Putting the lower right of madial wall at described electric appliance box, three described current amplifiers are arranged at described in three
The top that single-phase sky is opened, and single-phase sky described with three open one_to_one corresponding；
The upper top cover of described electric appliance box is additionally provided with three groups of current output terminal, one group of voltage output end
Son and one group of power input terminal, described power input terminal is by wire and described three-phase and four-line switch
Power input port is connected, and three fire wire output end mouths of described three-phase and four-line switch are by wire respectively
The live wire input port that single-phase sky described with three is opened is connected, the zero line input that three described single-phase skies are opened
The zero line output port that port is switched with described three-phase and four-line after being connected by wire is connected, each institute
State fire wire output end mouth that single-phase sky opens and zero line output port by wire respectively with corresponding each
The live wire input port of described current amplifier is connected with zero line output port, three described current amplifiers
Fire wire output end mouth be connected by wire and three groups of current output terminal respectively with zero line output port, institute
State three-phase and four-line switch three fire wire output end mouths by wire also with described voltage-phase change-over switch phase
Corresponding connection, the output port of described voltage-phase change-over switch is connected with described pressure regulator by wire,
The output port of described pressure regulator is connected by the Single port of wire with described output voltage terminals, described
The zero line output port phase that the another port of output voltage terminals is switched with described three-phase and four-line by wire
Even.
Preferably, in described pressure regulator and a mistake of connecting on the connection line of described voltage-phase change-over switch
Carry protection switch.
Further, the wire of the live wire input port of current amplifier each described is all connected one
Individual overcurrent protection switch.
Further, a voltmeter is set between described output voltage terminals, and described voltmeter is fixed
It is arranged on the upper top cover of described electric appliance box.
Preferably, arranging an electric appliance box support in the lower end of described electric appliance box, described electric appliance box support includes
One flat board and four supporting legs being arranged on four corners of described flat board, and between four described supporting legs all
It is provided with connection cross bar.
Further, the front at described electric appliance box support is fixedly installed leader.
Further, the lower section at each described supporting leg is respectively provided with a universal wheel.
Further, the rear at described support is fixedly installed two " L " type hooks.
The invention has the beneficial effects as follows:
1, present configuration is simple, easy for operation, when test, and can be for differential protection cabinet
There is provided a reference voltage that can carry out 120 ° of conversions simultaneously, provide one and benchmark electricity for CT loop
The big electric current of pressure equal angular, thus in the case of differential protection loop not being disassembled, from protection
Whole loop is disposably detected by cabinet side and inlet wire CT, not only increases loop-around test correctness,
It is also greatly reduced loop-around test work simultaneously, is effectively increased test job efficiency.
2, the voltmeter between voltage output electronics it is arranged on, it is possible to measurement real-time to reference voltage, with really
In the range of guarantor's reference voltage is in reasonably test.
3, the universal wheel below supporting leg it is arranged on so that be to add conveniently in the mobile present invention, meanwhile, if
Put " L " hook at support rear, test lead can be hung up temporarily, thus alleviate tester's
Labour intensity.
4, it is arranged on the overcurrent protection switch on each loop, the tester person, equipment can be effectively ensured
Safety.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is the part preferred embodiment of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is the overall structure side view of the present invention；
Fig. 3 is enlarged drawing at A in Fig. 2；
Fig. 4 is the circuit theory diagrams of the present invention；
In figure: 1 electric appliance box, 11 electrical equipment chamber doors, 2 current output terminal, 3 output voltage terminals, 4 electricity
Source input terminal, 5 current amplifiers, 6 single-phase skies are opened, 7 electric appliance box supports, 71 flat boards, 72 supporting legs,
73 handles, 74 universal wheels, 75 " L " type hook, 8 pressure regulators, 81 pressure regulator knobs, 9 voltage-phases
Change-over switch, 91 voltage-phase change-over switch knobs, 10 overcurrent protection switch, 101 wires, 102 3
Four wiretaps, 103 voltmeters mutually.
Detailed description of the invention
Below in conjunction with specific embodiment and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear,
It is fully described by, it is clear that described embodiment is only a part of preferred embodiment of the present invention, and
It is not all, of embodiment.Those skilled in the art can do class in the case of intension of the present invention
Like deformation, therefore the present invention is not limited by following public specific embodiment.
The invention provides a kind of differential circuit detection voltage, power supply delivery casing (as shown in Figure 1), including
Electric appliance box 1, single-phase sky open 6, three-phase and four-line switch 102, current amplifier 5, pressure regulator 8 and voltage
Phase change-over switch 9, in this specific embodiment, single-phase sky opens 6, three-phase and four-line switch 102, electric current
Amplifier 5, pressure regulator 8 and voltage-phase change-over switch 9 are existing product on market, and it is according to survey
Test system designs, and that all can commercially choose arrives.
Described electric appliance box 1 is a square box, and the electrical equipment chamber door 11 that it is carried is fixed in articulated manner
On the body of electric appliance box 1, described pressure regulator 8 and voltage-phase change-over switch 9 are arranged at described electricity
On the upper top cover of device case 1, pressure regulator knob 81 and voltage-phase change-over switch knob 91 both pass through electrical equipment
In the upper top cover position plane thereon of case 1, pressure regulator knob 81 and voltage-phase change-over switch knob 91
It is easy to outside in test process, debugs the size of voltage and the phase place of reference voltage at any time.Described three
Four wiretaps 102 are fixedly installed on the rear wall of described electric appliance box 1 (as shown in Figure 2) mutually, and with institute
State voltage-phase change-over switch 9 adjacent, three described single-phase skies open 6 be arranged on described electric appliance box 1 after
The lower right of sidewall, three described current amplifiers 5 are arranged at three described single-phase skies and open the top of 6,
And single-phase sky described with three open 6 one_to_one corresponding.
The upper top cover of described electric appliance box 1 is additionally provided with 2, the one group of voltage output of three groups of current output terminal
Terminal 3 and one group of power input terminal 4, the circuit theory diagrams of the present invention as shown in Figure 4, here, be just
In the line connecting relation expressed between electric elements, by the input of electric elements each in the present invention and
Output is referred to as live wire input thereon, zero line input, fire wire output end and zero line output
End, described power input terminal 4 is inputted by the power supply of wire 101 with described three-phase and four-line switch 102
Port (including live wire thereon and zero line input port) is connected, described three-phase and four-line switch 102
Three fire wire output end mouths open the live wire input port of 6 by wire 101 single-phase sky described with three respectively
Being connected, three described single-phase skies are opened after the zero line input port of 6 is connected by wire 101 with described
The zero line output port of three-phase and four-line switch 102 is connected, and each described single-phase sky opens the live wire output of 6
Port and zero line output port by wire 101 respectively with each corresponding described current amplifier 5
Live wire input port be connected with zero line output port, the fire wire output end of three described current amplifiers 5
Mouth is connected with three groups of current output terminal 2 by wire 101 respectively with zero line output port, described three-phase
Three fire wire output end mouths of four wiretaps 102 by wire 101 also with described voltage-phase change-over switch 9
Corresponding connection, the output port of described voltage-phase change-over switch 9 is by wire 101 and described pressure regulation
Device 8 is connected, and the output port of described pressure regulator 8 is by wire 101 and described output voltage terminals 3
Single port be connected, the another port of described output voltage terminals 3 is by wire 101 and described three-phase
The zero line output port of four wiretaps 102 is connected.
In test process, in order to protect each electric elements and tester's personal safety, here, in institute
State pressure regulator 8 and an overcurrent protection switch 10 of connecting on the connection line of described voltage-phase change-over switch 9,
An overload protection of all connecting on the wire of the live wire input port of current amplifier each described 5 is opened
Closing 10, when voltage or electric current are excessive, overcurrent protection switch 10 will be opened, cutoff circuit, with really
Ensure safety.
In test process, for ease of further determining that the reference voltage of output between output voltage terminals 4
Value, here, arrange a voltmeter 103 between described output voltage terminals 4, and described voltmeter 103
It is fixedly installed on the upper top cover of described electric appliance box 1.
For ease of carrying and the placement of electric appliance box 1, an electric appliance box is set in the lower end of described electric appliance box 1 and props up
Frame 7, described electric appliance box support 7 includes a flat board 71 and four be arranged on four corners of described flat board
Supporting leg 72, and between four described supporting legs 72, it is provided with connection cross bar, connect cross bar and be used for adding forceful electric power
The intensity of device box bracket 7, in use, electric appliance box 1 is fixed on flat board 71.For ease of movable electrical appliances
Box bracket 7, is fixedly installed leader 73, further, often in the front of described electric appliance box support 7
Article one, the lower section of described supporting leg 72 is respectively provided with a universal wheel 74, test time, it is sometimes desirable to test lead
The longest, for convenience of carrying of test lead, it is fixedly installed two at the rear of described electric appliance box support 7
" L " type hook 75, test lead can hang up on " L " type hook 75.
The operation instruction of the present invention is now carried out with the detection of volume three 110kV transformer differential protection loops:
The first step, accesses on-the-spot three-phase and four-line formula power supply by power input terminal.
Second step, by the corresponding current output terminal 2 of three strong current generators 5 respectively at main transformer
CT, 35kV side, 110kV side CT, 10kV side CT be linked in sequence according to P1, P2.
3rd step, takes test wire, and the system voltage terminal of differential protection cabinet is defeated with the voltage of the present invention
Go out terminal 4 to be connected, voltage-phase change-over switch 9 is pointed to AN direction.
4th step, the three-phase and four-line that closes 102, three single-phase switch 6 of switch, and adjust pressure regulator knob 81,
Reference voltage output is adjusted to 57V, respectively by the output electric current of three side current feedback circuits 5 according to the big ditty of CT
Whole to suitable electric current, protection screen checks the Current Voltage input of each side, such as high and low pressure side voltage is
0 °, high voltage side current shows 0 °, and medium voltage side low-pressure side electric current shows 180 °, and in addition to tested phase, its
He shows by phase no current, then this circuit connection is correct.
In the present invention, the relative position that "front", "rear" is for conveniently describing position relationship and uses,
Therefore cannot function as absolute position and be interpreted as limiting of its scope.
In addition to the technical characteristic described in specification, it is the known technology of those skilled in the art.
The above combines accompanying drawing and is described above in detail the preferred embodiment of the present invention and embodiment, but this
Invention is not limited to the above-described embodiment and examples, comes for those skilled in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some improvement and modification, these improve
Also protection scope of the present invention is should be regarded as with modification.
Claims (8)
1. differential circuit detection voltage, a power supply delivery casing, including electric appliance box, is characterized in that, this is defeated
Outlet also include single-phase sky open, three-phase and four-line switch, current amplifier, pressure regulator and voltage-phase conversion
Switching, described pressure regulator and voltage-phase change-over switch are arranged on the upper top cover of described electric appliance box, institute
State three-phase and four-line switch to be fixedly installed on the rear wall of described electric appliance box, and change with described voltage-phase
Switching adjacent, three described single-phase skies open the lower right of the madial wall being arranged on described electric appliance box, three institutes
State current amplifier and be arranged at the top that three described single-phase skies are opened, and single-phase sky described with three opens one
One is corresponding；
The upper top cover of described electric appliance box is additionally provided with three groups of current output terminal, one group of voltage output end
Son and one group of power input terminal, described power input terminal is by wire and described three-phase and four-line switch
Power input port is connected, and three fire wire output end mouths of described three-phase and four-line switch are by wire respectively
The live wire input port that single-phase sky described with three is opened is connected, the zero line input that three described single-phase skies are opened
The zero line output port that port is switched with described three-phase and four-line after being connected by wire is connected, each institute
State fire wire output end mouth that single-phase sky opens and zero line output port by wire respectively with corresponding each
The live wire input port of described current amplifier is connected with zero line output port, three described current amplifiers
Fire wire output end mouth be connected by wire and three groups of current output terminal respectively with zero line output port, institute
State three-phase and four-line switch three fire wire output end mouths by wire also with described voltage-phase change-over switch phase
Corresponding connection, the output port of described voltage-phase change-over switch is connected with described pressure regulator by wire,
The output port of described pressure regulator is connected by the Single port of wire with described output voltage terminals, described
The zero line output port phase that the another port of output voltage terminals is switched with described three-phase and four-line by wire
Even.
Differential circuit the most according to claim 1 detection voltage, power supply delivery casing, is characterized in that,
At described pressure regulator and an overcurrent protection switch of connecting on the connection line of described voltage-phase change-over switch.
Differential circuit the most according to claim 2 detection voltage, power supply delivery casing, is characterized in that,
An overload protection of all connecting on the wire of the live wire input port of current amplifier each described is opened
Close.
Differential circuit the most according to claim 3 detection voltage, power supply delivery casing, is characterized in that,
One voltmeter is set between described output voltage terminals, and described voltmeter is fixedly installed on described electrical equipment
On the upper top cover of case.
Differential circuit the most according to claim 1 detection voltage, power supply delivery casing, is characterized in that,
Arrange an electric appliance box support in the lower end of described electric appliance box, described electric appliance box support includes a flat board and setting
Four supporting legs on four corners of described flat board, and between four described supporting legs, it is provided with connection horizontal stroke
Bar.
Differential circuit the most according to claim 5 detection voltage, power supply delivery casing, is characterized in that,
It is fixedly installed leader in the front of described electric appliance box support.
Differential circuit the most according to claim 6 detection voltage, power supply delivery casing, is characterized in that,
It is respectively provided with a universal wheel in the lower section of each described supporting leg.
Differential circuit the most according to claim 7 detection voltage, power supply delivery casing, is characterized in that,
Two " L " type hooks it are fixedly installed at the rear of described support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236779.6A CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236779.6A CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105929300A true CN105929300A (en) | 2016-09-07 |
| CN105929300B CN105929300B (en) | 2019-01-04 |
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ID=56839308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610236779.6A Expired - Fee Related CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105929300B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| CN2248345Y (en) * | 1994-12-17 | 1997-02-26 | 胜利油田物资经济贸易集团公司 | Portable electric-control self-holding test instrument |
| CN201247298Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Automatic recognizing instrument for relay protection differential vector |
| CN102096003A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Automatic analytical device for checking wiring of conventional transformer |
| CN105206148A (en) * | 2015-10-08 | 2015-12-30 | 国网浙江临安市供电公司 | Electrician training device |
-
2016
- 2016-04-15 CN CN201610236779.6A patent/CN105929300B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| CN2248345Y (en) * | 1994-12-17 | 1997-02-26 | 胜利油田物资经济贸易集团公司 | Portable electric-control self-holding test instrument |
| CN201247298Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Automatic recognizing instrument for relay protection differential vector |
| CN102096003A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Automatic analytical device for checking wiring of conventional transformer |
| CN105206148A (en) * | 2015-10-08 | 2015-12-30 | 国网浙江临安市供电公司 | Electrician training device |
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| Publication number | Publication date |
|---|---|
| CN105929300B (en) | 2019-01-04 |
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