CN104730480B - The calibration equipment and system of split core type current transformer - Google Patents
The calibration equipment and system of split core type current transformer Download PDFInfo
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- CN104730480B CN104730480B CN201310706533.7A CN201310706533A CN104730480B CN 104730480 B CN104730480 B CN 104730480B CN 201310706533 A CN201310706533 A CN 201310706533A CN 104730480 B CN104730480 B CN 104730480B
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Abstract
The invention discloses a kind of calibration equipment of split core type current transformer and system.Wherein, the calibration equipment of split core type current transformer includes：Hanger bracket, with cross bar, the first support member, the second support member and fixture；Electric energy meter standard component, for providing stable test electric current；Reference test bar, is located on the first support member, the second support member and fixture, and the two ends of reference test bar are connected with electric energy meter standard component, forms the test loop for transmitting test electric current；And powermeter verification instrumeter, it is connected with electric energy meter standard component and split core type current transformer, the test current calculation for being detected according to split core type current transformer measures electric flux, and measurement electric flux is fed back into electric energy meter standard component.By the present invention, the problem of powermeter verification instrumeter easily larger error occurs in the prior art is solved, and then has reached the effect for reducing powermeter verification instrumeter error, improving the field-checking degree of accuracy.
Description
Technical field
The present invention relates to field of electrical equipment, a kind of calibration equipment in particular to split core type current transformer and it is
System.
Background technology
Electric energy meter on-site calibrator is used at the installing type electric energy meter actual motion such as transformer station, resident place scene
Test the measuring equipment of electric energy meter error.At the scene, electric energy meter is in energization operation conditions, due to client's needs, experiment safety
Consider Deng many factors, tend not to take disconnection electric energy meter circuit, electric energy meter on-site calibrator is then accessed in the line
Mode carry out the error measure of electric energy meter.Now, the means taken are to use split core type current transformer（Also referred to as electric current split-core type meter）
Current sample is carried out, by the way that electric current line is inserted in the jaw of electric current split-core type meter, current loop is obtained using electromagnetic induction principle
Current value, so as to calculate electric energy error.
Due to the position and angle by electric current split-core type meter jaw clean-up performance, the degree of wear, and the electric current line extended there through
Often there is certain error in degree influence, the current value that sampling is obtained, the sampling error of electric current split-core type meter is to constitute field-checking electricity
One of important sources and factor of energy Watch Error.Thus, when verifying in the electric energy meter on-site calibrator cycle, laboratory needs verification
The overall measurement error of electric energy meter on-site calibrator and electric current split-core type meter, is met with the elementary error for ensureing electric energy meter on-site calibrator
Use requirement.
At present, for the verification of split core type current transformer, take more device for energy meter standard electric current it is high-end and low
The connection of electricity consumption streamline is held, the mode that then split core type current transformer is clipped on electric current line carries out verification.Such a mode exist with
Under several deficiencies：
Firstly, since electric current line is generally flexible cord, and line footpath is mostly different from the jaw bore of electric current split-core type meter, therefore current clamp
When table vises electric current line, it is impossible to obtain position and the angle of fixation, suffer from this, the stability of check results is very poor, repeating
It is difficult to agreeing property preferable data during measurement, measurement result does not possess repdocutbility.
Secondly as during the internal resistance very little access device for energy meter standard of electric current line, device is substantially to operate in unloaded shape
State, thus may be impacted to measurement result.In addition, such connected mode, when the electric current passed through is larger, can be produced strong
Space magnetic field, so as to influence measurement result accuracy.
Furthermore, because the specification of electric current split-core type meter is different, generally require to change electric current according to the specification of electric current split-core type meter in experiment
Line, adds the complexity of operation, is also unfavorable for the holding of test environment.
The problem of easily larger error occur for powermeter verification instrumeter in correlation technique, not yet proposes effective solution at present
Certainly scheme.
The content of the invention
It is existing to solve it is a primary object of the present invention to provide the calibration equipment and system of a kind of split core type current transformer
The problem of easily there is larger error in powermeter verification instrumeter in technology.
To achieve these goals, according to an aspect of the invention, there is provided a kind of verification of split core type current transformer
Device, including：Hanger bracket, with cross bar, the first support member, the second support member and fixture, wherein, the first supports support exists
The lower section of cross bar first end, the second supports support is fixed on hanger bracket in the lower section at the end of cross bar second, the first end of fixture
Lower section；Electric energy meter standard component, for providing stable test electric current；Reference test bar, is located in the first support member, the second support member
On fixture, and the two ends of reference test bar are connected with electric energy meter standard component, form the test for transmitting test electric current
Loop；And powermeter verification instrumeter, it is connected with electric energy meter standard component and split core type current transformer, for according to pincerlike electric current
The test current calculation measurement electric flux that transformer is detected, and measurement electric flux is fed back into electric energy meter standard component.
Further, the first wire is laid along the first support member, wherein, the first wire is connecting test bar first end and electricity
The wire of energy table standard component；And second wire laid successively along the second support member, cross bar and the first support member, wherein, second
Wire is the wire of the end of connecting test bar second and electric energy meter standard component.
Further, reference test bar includes：First reference test bar；And second reference test bar, wherein, the cross section of the second reference test bar
Cross-sectional area of the product less than the first reference test bar.
Further, horizontal plane residing for the first reference test bar is higher than horizontal plane residing for the second reference test bar.
Further, the first reference test bar and the second reference test bar include：A phase reference test bars；B phase reference test bars；And C phases are tested
Bar, wherein, A phases reference test bar, the B phases reference test bar for belonging to the first reference test bar are identical with the cross-sectional area of C phase reference test bars, belong to second
A phases reference test bar, the B phases reference test bar of reference test bar are identical with the cross-sectional area of C phase reference test bars.
Further, horizontal plane residing for A phases reference test bar is higher than horizontal plane residing for B phase reference test bars, level residing for B phase reference test bars
Face is higher than horizontal plane residing for C phase reference test bars.
Further, calibration equipment also includes：A phases are switched, on the test loop for being arranged on A phase reference test bars；B phases are switched,
On the test loop for being arranged on B phase reference test bars；And C phases are switched, on the test loop for being arranged on C phase reference test bars, electric energy meter mark
Quasi- part includes：Control panel, is switched, B phases are switched and C phases are switched and are connected with A phases.
Further, the quantity of fixture is multiple, and the first end of each fixture is each attached to the lower section of hanger bracket, many
The midpoint of individual fixture line and the center of hanger bracket are on same vertical curve.
To achieve these goals, there is provided a kind of verification of split core type current transformer according to another aspect of the present invention
System, including：Split core type current transformer；And calibration equipment, wherein, calibration equipment is appointing that the above of the present invention is provided
A kind of calibration equipment of split core type current transformer.
The present invention uses the calibration equipment of the split core type current transformer with following structure：Hanger bracket, with cross bar, first
Support member, the second support member and fixture, wherein, the first supports support is in the lower section of cross bar first end, the second support member branch
Support is in the lower section at the end of cross bar second, and the first end of fixture is fixed on the lower section of hanger bracket；Electric energy meter standard component is steady for providing
Fixed test electric current；Reference test bar, is located on the first support member, the second support member and fixture, and the two ends of reference test bar are equal
It is connected with electric energy meter standard component, forms the test loop for transmitting test electric current；And powermeter verification instrumeter, with electric energy meter
Standard component is connected with split core type current transformer, and the test current calculation for being detected according to split core type current transformer is measured
Electric flux, and measurement electric flux is fed back into electric energy meter standard component.By the school for the split core type current transformer for setting said structure
Experiment device, can hang on split core type current transformer on reference test bar, and the test by reference test bar is detected by electromagnetic induction
Electric current, the verifying attachment of such a structure is by reference test bar transmission test electric current, when split core type current transformer is hung on reference test bar
Fixed position and angle can be obtained, it is ensured that the stability of check results, and then split core type current transformer can be adopted
Sample error is accurately verified, it is to avoid follow-up to constitute site error to powermeter verification instrumeter, solves electric energy meter in the prior art
The problem of easily there is larger error in tester, and then reached that reduction powermeter verification instrumeter error, raising field-checking are accurate
The effect of degree.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the calibration equipment of split core type current transformer according to embodiments of the present invention；
Fig. 2 is the enlarged drawing of 21 parts in Fig. 1；
Fig. 3 is the verification schematic diagram of the calibration equipment of split core type current transformer according to embodiments of the present invention；
Fig. 4 is the schematic diagram of the calibration equipment of current transformer according to the preferred embodiment of the invention；
Fig. 5 be the split core type current transformer of the embodiment of the present invention calibration equipment in control panel control test loop principle
Figure；And
Fig. 6 and Fig. 7 be split core type current transformer according to embodiments of the present invention calibration equipment in two pieces of control panels show
It is intended to.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The embodiments of the invention provide a kind of calibration equipment of split core type current transformer, the embodiment of the present invention is carried below
The calibration equipment of the split core type current transformer of confession is specifically introduced：
Fig. 1 is the structure chart of the calibration equipment of split core type current transformer according to embodiments of the present invention, and Fig. 2 is 21 in Fig. 1
The enlarged drawing at place, as depicted in figs. 1 and 2, the calibration equipment mainly include hanger bracket 10, electric energy meter standard component 20, reference test bar 30
And powermeter verification instrumeter（Not shown in figure）, wherein：
Hanger bracket 10 has cross bar 11, the first support member 12, the second support member 13 and fixture 14, wherein, the first support
Part 12 is supported on the lower section of the first end of cross bar 11, and the second support member 13 is supported on the lower section at the end of cross bar 11 second, i.e. the first support
The support member 13 of part 12 and second is supported on the two ends of hanger bracket 10, and the first end of fixture 14 is fixed on the lower section of hanger bracket 10.
Electric energy meter standard component 20 is used to provide stable test electric current.
Reference test bar 30 is located on the first support member 12, the second support member 13 and fixture 14, and the two of reference test bar 30
End is connected with electric energy meter standard component 20, forms the test loop for transmitting test electric current.
Powermeter verification instrumeter is connected with electric energy meter standard component 20 and split core type current transformer, for according to pincerlike electric current
The test current calculation measurement electric flux that transformer is detected, and measurement electric flux is fed back into electric energy meter standard component 20.Specifically
Ground, powermeter verification instrumeter can be counted using any method for calculating measurement electric flux in the prior art to measurement electric flux
Calculate, the test electric current mainly detected according to split core type current transformer, and the magnitude of voltage in test loop, calculate measurement electricity
Energy, then feeds back to electric energy meter standard component 20 by measurement electric flux equal proportion in electric pulse form.The energy of electric energy meter standard component 20
The preferable electric flux itself provided, and the measurement electric flux phase that the preferable electric flux is measured with powermeter verification instrumeter are enough provided
Compare, obtain measurement error, complete verification.
Fig. 3 is the verification schematic diagram of calibration equipment according to embodiments of the present invention, as shown in figure 3, split core type current transformer
The verification principle of calibration equipment be：Electric energy meter standard component 20 provides the test electric current transmitted on reference test bar 30, by pincerlike electricity
Current transformer is suspended on reference test bar 30, is able to detect that test electric current, and powermeter verification instrumeter is examined according to split core type current transformer
The test current calculation measurement electric flux measured, and measurement electric flux is fed back into electric energy meter standard component 20, electric energy meter standard component
The 20 preferable electric fluxs for being provided itself compare with the measurement electric flux that powermeter verification instrumeter is measured, and obtain measurement error,
Complete verification.
By the calibration equipment of the split core type current transformer of the embodiment of the present invention, split core type current transformer can be hung on
On reference test bar 30, the test electric current by reference test bar 30 is detected by electromagnetic induction, the verifying attachment of such a structure is by surveying
The transmission test electric current of bar 30, split core type current transformer, which is hung on, can obtain fixed position and angle when on reference test bar 30,
The stability of check results is ensure that, and then the sampling error of split core type current transformer can accurately be verified, it is to avoid after
Continue and constitute site error to powermeter verification instrumeter, solve powermeter verification instrumeter in the prior art and asking for larger error easily occur
Topic, and then reached the effect for reducing powermeter verification instrumeter error, improving the field-checking degree of accuracy.
Preferably, the first wire is laid along first support member 12, wherein, first wire is the connection test
The wire of the first end of bar 30 and the electric energy meter standard component 20.Second wire is successively along second support member 13, the cross bar
11 and first support member 12 lay, wherein, second wire is connects the end of reference test bar 30 second and the electric energy
The wire of table standard component 20.That is, electric current line enters hanger bracket 10 from the collateral support of hanger bracket 10 first, reaches and hangs through fixture 14
The collateral support of the second of frame 10, returns to the first collateral support of hanger bracket 10 through top cross bar 11 upwards, downwards from the first collateral support bottom
Portion returns to electric energy meter standard component 20.
Due to that when being passed through electric current, when electric current formation ring-type, stronger magnetic field can be produced at the center of ring, so as to measurement
Have a huge impact.Therefore the mode of backtracking is taken, reduces the size of electric current loop as far as possible, so as to reduce space magnetic
, to reduce the influence that test electric current is detected to split core type current transformer, reach the effect for ensureing the verification degree of accuracy.
Fig. 4 is the schematic diagram of the calibration equipment of split core type current transformer according to the preferred embodiment of the invention, such as Fig. 4 institutes
Show, in the preferred embodiment, the quantity of reference test bar 30 includes diagrammatically illustrating two kinds in the reference test bar of plurality of specifications, Fig. 4, its
In, the first reference test bar 31 and the second reference test bar 32 are located on the first support member 12, the second support member 13 and fixture 14, are surveyed
The specification of bar can be embodied by the size of reference test bar cross section, and the horizontal stroke of the second reference test bar 32 is diagrammatically illustrated in Fig. 4
Sectional area is less than the cross-sectional area of the first reference test bar 31, in embodiments of the present invention, the first reference test bar 31 can be set into horizontal stroke
Sectional area is 25mm2Reference test bar, the second reference test bar 32 is set to cross-sectional area for 4mm2Reference test bar.
By setting the different reference test bar of specification on hanger bracket, electric current line need not be changed by realizing, you can to different rule
The split core type current transformer of lattice is verified, and reduces the complexity of operation, and is conducive to testing and verifies the holding of environment.
Preferably, horizontal plane residing for the first reference test bar 31 is higher than horizontal plane residing for the second reference test bar 32, i.e. cross-sectional area
Horizontal plane residing for larger reference test bar, higher than the horizontal plane residing for the less reference test bar of cross-sectional area.
The larger reference test bar of cross-sectional area is used to transmit larger test electric current, and the less reference test bar of cross-sectional area is used to pass
Defeated less test electric current, and the bigger magnetic field of electric current is stronger, by the way that the larger reference test bar of cross-sectional area is arranged on by the top
Position, is more nearly the return current line of top cross bar, reaches the effect for further reducing space magnetic field.
Preferably, the first reference test bar 31 and the second reference test bar 32 are tested including A phases reference test bar, B phases reference test bar with C phases
Bar, wherein, A phases reference test bar, the B phases reference test bar for belonging to the first reference test bar 31 are identical with the cross-sectional area of C phase reference test bars, belong to
A phases reference test bar, the B phases reference test bar of two reference test bars 32 are identical with the cross-sectional area of C phase reference test bars.
By the way that the first reference test bar 31 and the second reference test bar 32 are disposed as into three-phase reference test bar, realizing directly to be carried out
Three-phase is verified.
Preferably, horizontal plane residing for A phases reference test bar is higher than horizontal plane residing for B phase reference test bars, horizontal plane residing for B phase reference test bars
Higher than horizontal plane residing for C phase reference test bars.
Because in actual verification, the single-phase verification to split core type current transformer is relatively more, so, by by A phase reference test bars
Position by the top is arranged on, the return current line of top cross bar is more nearly, the space reduced in test checking procedure is reached
Magnetic field.
Further, the calibration equipment of the split core type current transformer of the embodiment of the present invention also includes control test loop conducting
Or the switch disconnected, the switch can be relay switch.Specifically, A phases are set to open on the test loop of A phase reference test bars
Close, set B phases to switch on the test loop of B phase reference test bars, set C phases to switch on the test loop of C phase reference test bars.Electric energy
Table standard component 20 then includes control panel, and the control panel is mainly used in control calibration equipment and provides survey on the reference test bar of which kind of specification
Electric current is tried, and for controlling which phase current line to reference test bar to provide test electric current, wherein, control panel is switched with A phases, B phases
Switch is switched with C phases to be connected, for the closure by controlling switch or disconnection, to control whether to carry to a certain phase current line
For whether testing electric current.
Fig. 5 is the schematic diagram that control panel controls test loop, as shown in figure 5, being illustrated exemplified by carrying out A phase current verifications former
Reason：AIH point of the electric current from three-phase current case（A-A phases, I- electric currents, H- is high-end, input）On input to electric energy meter standard component 20
No. 1 point knob, enter the standard scale built in electric energy meter standard component 20 through No. 1 point knob connection, standard gone out from No. 2 point knobs
Table, comes on the A phase test loops of the first reference test bar 31, on the A phase test loops of the second reference test bar 32 and electric energy meter standard component
On 20 built-in A phases loop, respectively there is a relay switch on this 3 test loops.When needing the A by the first reference test bar 31
During phase loop, the relay of No. 5 points of control is connected, and 3, No. 4 point relays disconnect；When needing the A phases by the second reference test bar 32
During loop, the relay of No. 4 points is connected, and 3, the relay of No. 5 points disconnects；When needing by A phases built in electric energy meter standard component 20
During current loop, the relay of No. 3 points is connected, 4, the relay of No. 5 points disconnect, be achieved in the current switching in three loops.
After 3 or 4 or No. 5 points, electric current passes through reference test bar or built-in current loop, from AIL points（A-A phases, I- electric currents are L- low sides, defeated
Go out end）Return to three-phase current case.
That is, the calibration equipment for the split core type current transformer that the embodiment of the present invention is provided, with the two circuit electric current of three-phase
Line, there is two current loops, and electric energy meter standard component 20 has a current loop in itself, therefore when the installation pincer on reference test bar
During current transformer, device for energy meter standard is required to be controlled three road current loops.This programme is taken to return in electric current
The mode for installing relay in road additional is controlled, and 9 Control current switchings are designed in the loop of three-phase three altogether, is that this can be adopted
Take the mode of dual control board.Control command is write to the soft and hardware control system of electric energy meter standard component 20, so that in electric energy meter mark
The control to three loop currents is realized in the verification software that the manually operated keyboard and computer of quasi- part 20 are installed.
Fig. 6 and Fig. 7 be split core type current transformer according to embodiments of the present invention calibration equipment in two pieces of control panels show
It is intended to, as shown in Figure 6 and Figure 7, three relays in A phases loop are controlled by XSB7, XSB8, XSB5 of No. 2 control panels 42, B phases
Three relays in loop are controlled by XSB3, XSA3, XSA5 of No. 1 control panel 41, and three relays in C phases loop are by No. 1 control
XSB11, XSA8, XSA11 control of making sheet 41.
Preferably, in embodiments of the present invention, the quantity of fixture 14 is multiple, and the first end of each fixture 14 is solid
The lower section of hanger bracket 10 is scheduled on, the midpoint of multiple lines of fixture 14 is on same vertical curve with the center of hanger bracket 10.Fig. 3
In diagrammatically illustrate the calibration equipment of split core type current transformer and include two fixtures 14.
It is multiple by the way that the quantity of fixture is set to, the stability of reference test bar is further ensured, and then further protect
Card split core type current transformer, which is hung on, can obtain fixed position and angle when on reference test bar.
The embodiment of the present invention additionally provides a kind of check system of split core type current transformer, and the check system is except including pincers
Outside shape current transformer, include the verification dress of any split core type current transformer for being provided of the above of the embodiment of the present invention
Put.
As can be seen from the above description, the present invention realizes following technique effect：
By being supported the use with existing electric energy meter standard component 20, the standardization school to split core type current transformer is realized
Test, and then realize the verification of the standardization to the electric energy meter on-site calibrator with split core type current transformer.Due to reference test bar 30
Hard material is taken, and is fixed on hanger bracket 10,4mm2And 25mm2The pincers of the secondary current split-core type meter of current main-stream are corresponded to respectively
Mouthful size, realize the purpose through electric current line position and the angle fixation of electric current split-core type meter jaw, it is to avoid because orientation problem
Cause measurement error change greatly, inaccurate technical problem, it is ensured that uniformity, the accuracy of measurement result.Simultaneously as same
When possess two lines road, also eliminate according to specification change electric current line work, simplify work flow.
Also, the need for considering automation verification simultaneously, all controls to loop current can be selected by software,
Set, simple, intuitive, the different scheme by setting, it is possible to achieve higher automation level check, improve operating efficiency.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of calibration equipment of split core type current transformer, it is characterised in that including：
Hanger bracket (10), with cross bar (11), the first support member (12), the second support member (13) and fixture (14), wherein, institute
The lower section that the first support member (12) is supported on the cross bar (11) first end is stated, second support member (13) is supported on the horizontal stroke
The lower section at the end of bar (11) second, the first end of the fixture (14) is fixed on the lower section of the hanger bracket (10)；
Electric energy meter standard component (20), for providing stable test electric current；
Reference test bar (30), is located on first support member (12), second support member (13) and the fixture (14),
And the two ends of the reference test bar (30) are connected with the electric energy meter standard component (20), formed for transmitting the test electricity
The test loop of stream；And
Powermeter verification instrumeter, is connected with the electric energy meter standard component (20) and split core type current transformer, for according to described
The test current calculation that split core type current transformer is detected measurement electric flux, and the measurement electric flux fed back to described
Electric energy meter standard component (20),
Wherein, the test of kilo watthour meter instrument is tested in electric current and test loop according to what the split core type current transformer was detected
Magnitude of voltage, calculating obtains measuring electric flux；The measurement electric flux equal proportion is fed back into electric energy meter standard in electric pulse form
Part (20), wherein, the electric energy meter standard component (20) calculates the preferable electric flux itself provided, and according to the preferable electric energy
The measurement electric flux that amount is measured with the powermeter verification instrumeter determines measurement error.
2. calibration equipment according to claim 1, it is characterised in that：
First wire is laid along first support member (12), wherein, first wire is connects the reference test bar (30) the
One end and the wire of the electric energy meter standard component (20)；And
Second wire is laid along second support member (13), the cross bar (11) and first support member (12) successively, its
In, second wire is the connection end of reference test bar (30) second and the wire of the electric energy meter standard component (20).
3. calibration equipment according to claim 1, it is characterised in that the reference test bar (30) includes：
First reference test bar (31)；And
Second reference test bar (32), wherein, the cross-sectional area of second reference test bar (32) is less than first reference test bar (31)
Cross-sectional area.
4. calibration equipment according to claim 3, it is characterised in that horizontal plane residing for first reference test bar (31) is higher than
Horizontal plane residing for second reference test bar (32).
5. calibration equipment according to claim 3, it is characterised in that first reference test bar (31) and second test
Bar (32) includes：
A phase reference test bars；
B phase reference test bars；And
C phase reference test bars, wherein, belong to the A phases reference test bar, the B phases reference test bar and the C of first reference test bar (31)
The cross-sectional area of phase reference test bar is identical, belong to the A phases reference test bar of second reference test bar (32), the B phases reference test bar and
The cross-sectional area of the C phases reference test bar is identical.
6. calibration equipment according to claim 5, it is characterised in that horizontal plane residing for the A phases reference test bar is higher than the B
Horizontal plane residing for phase reference test bar, horizontal plane residing for the B phases reference test bar is higher than horizontal plane residing for the C phases reference test bar.
7. calibration equipment according to claim 5, it is characterised in that：
The calibration equipment also includes：
A phases are switched, on the test loop for being arranged on the A phases reference test bar；
B phases are switched, on the test loop for being arranged on the B phases reference test bar；And
C phases are switched, on the test loop for being arranged on the C phases reference test bar,
The electric energy meter standard component (20) includes：
Control panel, is switched, the B phases are switched and the C phases are switched and are connected with the A phases.
8. calibration equipment according to claim 1, it is characterised in that the quantity of the fixture (14) be it is multiple, each
The first end of the fixture (14) is each attached in the lower section of the hanger bracket (10), multiple fixture (14) lines
The center of point and the hanger bracket (10) is on same vertical curve.
9. a kind of check system of split core type current transformer, it is characterised in that including：
Split core type current transformer；And
Calibration equipment, wherein, the calibration equipment is the school of the split core type current transformer any one of claim 1 to 8
Experiment device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310706533.7A CN104730480B (en) | 2013-12-19 | 2013-12-19 | The calibration equipment and system of split core type current transformer |
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| CN201310706533.7A CN104730480B (en) | 2013-12-19 | 2013-12-19 | The calibration equipment and system of split core type current transformer |
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| CN104730480B true CN104730480B (en) | 2017-10-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071792U (en) * | 1990-04-15 | 1991-02-20 | *** | Electric energy metering on-line detector for clamp mutual-inductor |
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| US7305310B2 (en) * | 2004-10-18 | 2007-12-04 | Electro Industries/Gauge Tech. | System and method for compensating for potential and current transformers in energy meters |
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