CN108152659A - A kind of method for judging electromagnetic potential transformer turn-to-turn insulation short circuit - Google Patents
A kind of method for judging electromagnetic potential transformer turn-to-turn insulation short circuit Download PDFInfo
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- CN108152659A CN108152659A CN201711437197.5A CN201711437197A CN108152659A CN 108152659 A CN108152659 A CN 108152659A CN 201711437197 A CN201711437197 A CN 201711437197A CN 108152659 A CN108152659 A CN 108152659A
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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
- G01R31/72—Testing of electric windings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of methods for judging electromagnetic potential transformer turn-to-turn insulation short circuit, make single-phase use suitable for electromagnetic potential transformer or more single-phase electricity electromagnetic type voltage transformer combinations make three-phase use in V V-arrangements, first pressurize and measure in adjacent two electromagnetic potential transformers, when voltmeter instruction is larger, illustrate bad with the presence of an electromagnetic potential transformer turn-to-turn insulation, pressure regulator is down to zero in time.The electromagnetic potential transformer of overvoltage is added to repeat to test, and according to different situations judged the uninflated electromagnetic potential transformer of another and any one again.The present invention only needs to coordinate simple operations by simple components, you can realizes the judgement to problem, using simplicity, helps to improve working efficiency.
Description
Technical field
The invention belongs to power system security guard method technical field more particularly to a kind of judgement electromagnetic potential mutual inductances
The method of device turn-to-turn insulation short circuit.
Technical background
At present, when electric voltage exception occur in 10kV, 35kV, 110kV, 220kV electromagnetic potential, in order to ensure electric system is pacified
Entirely, fault spread is prevented, it is usually that electromagnetic potential transformer is out of service, treat professional testing crew inspection.
When electromagnetic potential transformer longtime running, temperature can increase naturally, and when turn-to-turn insulation is bad, insulation also can be with
Decline, form turn-to-turn short circuit, cause monitoring voltage abnormal.When testing crew reaches working site experiment, electromagnetic potential
Mutual inductor temperature has declined, and turn-to-turn insulation is restored.Since the test voltage of no-load voltage ratio bridge test instrument offer is than relatively low,
The electromagnetic potential transformer that turn-to-turn insulation is restored is measured, is susceptible to erroneous judgement.Often occur at that time that power transmission is normal, mistake
Once there is monitoring voltage exception again in the time.
A kind of electromagnetic potential transformer turn-to-turn short circuit detection dress of the disclosure of the invention of Patent No. 201710267297.1
It puts and method, the detection device includes that module, high speed acquisition module occur for high frequency low voltage steep-sided pulse and to be built-in with analysis soft
The host computer of part；Module occurs for the high frequency low voltage steep-sided pulse for generating nanosecond steep-sided pulse, and steep-sided pulse signal is injected
Into tested electromagnetic potential transformer winding；The high speed acquisition module passes through tested electromagnetic potential transformer for acquiring
Signature waveform after winding, containing winding short circuit failure, and pre-processed and be transmitted to host computer after being stored；The host computer
The signature waveform received is analyzed and processed using repetition pulse method, so as to obtain tested electromagnetic potential transformer winding
Short trouble feature.The invention can not only be positioned but also can be determined for being detected to voltage transformer winding early stage turn-to-turn fault
Amount compares turn-to-turn insulation situation, avoids the further expansion of failure, the safe and stable operation for electric system provides reliable guarantor
Barrier.
A kind of generator terminal voltage mutual inductor turn-to-turn short circuit of the disclosure of the invention of Patent No. 201410039668.7 exists
Line method of discrimination measures main transformer high-pressure side residual voltage, factory's low pressure side residual voltage, generator neutral point residual voltage and divides
The fundamental wave virtual value of each residual voltage is not calculated；It is exhausted over the ground that stator winding is calculated using injected type stator ground protection principle
Edge resistance value；Definite value, and institute are acted when the fundamental wave virtual value of the generator neutral point residual voltage is more than stator ground fault protection
The fundamental wave virtual value of fundamental wave virtual value and factory's low pressure side residual voltage for stating main transformer high-pressure side residual voltage is below institute
Definite value is stated, and the stator winding insulation against ground resistance value does not reduce, be then judged as generator terminal voltage mutual inductor turn-to-turn
Short circuit is alarmed after delay, and is latched sensitive section of zero-sequence fundamental voltage stator ground fault protection.The inventive method can be accurate
Judge generator generator terminal PT shorted-turn faults, effectively prevent the malfunction of stator ground fault protection in the case, while significantly
Shorten the malfunction elimination time.
However, the above method is required to that a large amount of detection electronic component and intelligent processing module, cost Gao Yi is configured
Damage, use and maintenance cost are higher, are unfavorable under the conditions of bad working environments or simple operating mode, fast and simple to be judged, institute
To need a kind of simple and convenient method for judging the short circuit of voltage transformer turn-to-turn insulation being easily achieved.
Invention content
The present invention provides a kind of methods for judging electromagnetic potential transformer turn-to-turn insulation short circuit, it is only necessary to pass through simple member
Part coordinates simple operations, you can realizes the judgement to problem, using simplicity, helps to improve working efficiency.
In order to solve the above technical problems, the present invention provides a kind of judgement electromagnetic potential transformer turn-to-turn insulation short circuits
Method includes the following steps：
1）The detection device for judging the short circuit of electromagnetic potential transformer turn-to-turn insulation is chosen, including AC voltage regulator one, exchange
Voltmeter one；
2）By fault-free equal in adjacent three electromagnetic potential transformers to be checked or have and for only one is broken down, it will
Three voltage transformers are respectively defined as A groups, B groups, C groups, and the secondary side of A groups with B groups is corresponded to winding parallel connection respectively；
3）It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and passes through AC voltage regulator to A groups, B group secondary sides
Parallel connected end is slowly pressurizeed, and observes the voltage value of alternating current ammeter；
4）When the indicating value of alternating current ammeter increase by a relatively large margin, and one does not occur with the slow pressurization of AC voltage regulator
When directly keeping smaller indicating value, it was demonstrated that A groups, B groups are all trouble-free electromagnetic potential transformers；
5）It by alternating current ammeter and is connected between B groups, the high-voltage winding of C groups, and passes through AC voltage regulator to B groups, C group secondary sides
Parallel connected end is slowly pressurizeed, and observes the voltage value of alternating current ammeter；
6）When the indicating value of alternating current ammeter increase by a relatively large margin, and one does not occur with the slow pressurization of AC voltage regulator
When directly keeping smaller indicating value, it was demonstrated that A groups, B groups, C groups are all trouble-free electromagnetic potential transformers, test ending；
7）When progress step 3）Afterwards, the indicating value of alternating current ammeter is with the slow increasing of appearance by a relatively large margin of pressurizeing of AC voltage regulator
Greatly, when and finally keeping larger indicating value, it was demonstrated that it is bad with the presence of an electromagnetic potential transformer turn-to-turn insulation between A groups, B groups,
Pressure regulator is down to zero in time at this time, repeats step 5）；
8）When the indicating value of alternating current ammeter is with the slow increase of appearance by a relatively large margin of pressurizeing of AC voltage regulator, and finally keeps
During larger indicating value, it was demonstrated that B group electromagnetic potential transformers are bad there are turn-to-turn insulation, pressure regulator are down to zero in time at this time, inspection
Test end；
9）When progress step 7）Afterwards, the indicating value of alternating current ammeter does not occur by a relatively large margin with the slow pressurization of AC voltage regulator
Increase, and when being always maintained at smaller indicating value, it was demonstrated that A group electromagnetic potential transformers are bad there are turn-to-turn insulation, at this time and
When pressure regulator is down to zero, test ending；
10）When progress step 5）Afterwards, the indicating value of alternating current ammeter occurs by a relatively large margin with the slow pressurization of AC voltage regulator
When increasing, and finally keeping larger indicating value, it was demonstrated that C group electromagnetic potential transformers are bad there are turn-to-turn insulation, in time will at this time
Pressure regulator is down to zero, test ending；
11）When progress step 6）Afterwards, three electromagnetic potential transformers that can be adjacent to next group are according to step 2）To step 10）
Method carry out coding check, until checking the electromagnetic potential transformer there are failure.
Further, the AC voltage regulator is preferably 220V AC voltage regulators.
Further, the inspection voltage of the AC voltage regulator is no more than 60V.
Further, the A.C. voltmeter is preferably 750V A.C. voltmeters.
Induction voltage transformer in the present invention, operation principle is identical with transformer, and basic structure is also iron
The heart and primary side, secondary side winding.Feature is capacity very little and more constant, close to light condition during normal operation.Voltage
The impedance very little of mutual inductor in itself, once short circuit occurs for secondary side, coil is burnt in sharp increase by electric current.For this purpose, voltage
Side of mutual inductor is connected to fuse, while secondary side reliable ground, in order to avoid primary side, the insulation damage of secondary side
When, there is high potential over the ground and causes the person and equipment breakdown in secondary side.
The method of the present invention is particularly well suited to electromagnetic potential transformer and makees single-phase use or more single-phase electricity magnetic-type voltages
Mutual inductor combination makees three-phase use in V-V shapes, due to the sensitivity of current transformer substation Power System Shortcuts trip system, Dang Yitai
Electromagnetic potential transformer breaks down that turn-to-turn short circuit occurs, and when leading to monitoring voltage exception, system will alarm rapidly
And electricity is jumped, so, while the probability that two or more single-phase electricity electromagnetic type voltage transformer failures occur is smaller, thus it is of the invention
The premise of application is equal fault-free or to have and only one is broken down in electromagnetic potential transformer, can meet most feelings
Breakdown judge under condition, and be to be considered as three mutual induction of voltage using three adjacent electromagnetic potential transformers as one group
Device is in application, mostly three single-phase potential transformer connections use.
It can be using as common detection device, by simply detecting step the beneficial effects of the present invention are the present invention
Suddenly, quick, accurate judgement electromagnetic potential transformer is with the presence or absence of turn-to-turn short circuit, i.e., two electromagnetic potential transformers two in office
Secondary pressurization, then the method by shunt voltage table judge that electromagnetic potential transformer is bad with the presence or absence of turn-to-turn insulation.This letter
The disclosure of list and practical approach is conducive to improve working efficiency, achievees the purpose that accurate judgement failure electromagnetic potential transformer,
It is especially suitable for complicated severe work condition environment, is particularly easy to realize and practical.
Description of the drawings
Below in conjunction with attached drawing, the technical solution in the embodiment of the present invention is described：
Fig. 1 is the detection wiring diagram of detection device of the present invention.
Fig. 2 is the judgement schematic diagram in the embodiment of the present invention one.
Specific embodiment
Embodiment one
As shown in Figure 1 and Figure 2, judge by actual condition common sense, with equal nothing in adjacent three electromagnetic potential transformers to be checked
Failure or have and only one break down for, three voltage transformers are respectively defined as A groups, B groups, C groups, choose 220V
AC voltage regulator and 750V A.C. voltmeters judge the detection of electromagnetic potential transformer turn-to-turn insulation short circuit according to Fig. 1 assemblings
Device, it is specific to judge that once several situations judge for operation point：
Judge 1：The secondary side of A groups with B groups is corresponded into winding parallel connection respectively, by alternating current ammeter and is connected to A groups, the high pressure of B groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of A groups, B group secondary sides, observe the voltage of alternating current ammeter
Value；When the indicating value of alternating current ammeter increase by a relatively large margin does not occur, and always with the slow pressurization of AC voltage regulator
When keeping smaller indicating value, it was demonstrated that A groups, B groups are all trouble-free electromagnetic potential transformers；By alternating current ammeter and be connected to B groups,
Between the high-voltage winding of C groups, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of B groups, C group secondary sides, observe alternating current
The voltage value of table；When there is not increase by a relatively large margin with the slow pressurization of AC voltage regulator in the indicating value of alternating current ammeter,
And when being always maintained at smaller indicating value, it was demonstrated that A groups, B groups, C groups are all trouble-free electromagnetic potential transformers, test ending；
Judge 2：It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and it is secondary to A groups, B groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter；The indicating value of alternating current ammeter is slow with AC voltage regulator
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that has the electromagnetic potential mutual between A groups, B groups
Sensor is bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,；By alternating current ammeter and it is connected to B groups, the high pressure of C groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of B groups, C group secondary sides, observe the voltage of alternating current ammeter
Value；When there is increase by a relatively large margin with the slow pressurization of AC voltage regulator in the indicating value of alternating current ammeter, and finally keep compared with
During big indicating value, it was demonstrated that B group electromagnetic potential transformers are bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time, examine
Terminate, judge that simple diagram is as shown in Figure 2；
Judge 3：It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and it is secondary to A groups, B groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter；The indicating value of alternating current ammeter is slow with AC voltage regulator
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that has the electromagnetic potential mutual between A groups, B groups
Sensor is bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,；By alternating current ammeter and it is connected to B groups, the high pressure of C groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of B groups, C group secondary sides, observe the voltage of alternating current ammeter
Value；The indicating value of alternating current ammeter does not occur increase by a relatively large margin with the slow pressurization of AC voltage regulator, and protects always
When holding smaller indicating value, it was demonstrated that A group electromagnetic potential transformers are bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,
Test ending；
Judge 4：The secondary side of A groups with B groups is corresponded into winding parallel connection respectively, by alternating current ammeter and is connected to A groups, the high pressure of B groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of A groups, B group secondary sides, observe the voltage of alternating current ammeter
Value；When the indicating value of alternating current ammeter increase by a relatively large margin does not occur, and always with the slow pressurization of AC voltage regulator
When keeping smaller indicating value, it was demonstrated that A groups, B groups are all trouble-free electromagnetic potential transformers, C group failures；It at this time can be in order to test
This judgement is demonstrate,proved, by alternating current ammeter and is connected between B groups, the high-voltage winding of C groups, and it is secondary to B groups, C groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter, indicating value the delaying with AC voltage regulator of alternating current ammeter
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that there are turn-to-turns for C groups electromagnetic potential transformer
Pressure regulator is down to zero, test ending by defective insulation in time at this time；
After all judgements, if there is the situation for judging 1, three electromagnetic potential transformers that can be adjacent to next group
According to the step 2 in specification）To step 10）Method carry out coding check, until check there are failure electromagnetic type electricity
Press mutual inductor.
Embodiment two
Judge by actual condition common sense, with fault-free equal in adjacent three electromagnetic potential transformers to be checked or have and only
For one is broken down, three voltage transformers are respectively defined as A groups, B groups, C groups, choose 220V AC voltage regulators and
750V A.C. voltmeters what is different from the first embodiment is that in the Wiring detection method of embodiment one, judge 2,3,4 situation
It is as follows：
Judge 2：It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and it is secondary to A groups, B groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter；The indicating value of alternating current ammeter is slow with AC voltage regulator
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that has the electromagnetic potential mutual between A groups, B groups
Sensor is bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,；By alternating current ammeter and it is connected to A groups, the high pressure of C groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of A groups, C group secondary sides, observe the voltage of alternating current ammeter
Value；When there is increase by a relatively large margin with the slow pressurization of AC voltage regulator in the indicating value of alternating current ammeter, and finally keep compared with
During big indicating value, it was demonstrated that A group electromagnetic potential transformers are bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time, examine
Terminate；
Judge 3：It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and it is secondary to A groups, B groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter；The indicating value of alternating current ammeter is slow with AC voltage regulator
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that has the electromagnetic potential mutual between A groups, B groups
Sensor is bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,；By alternating current ammeter and it is connected to A groups, the high pressure of C groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of A groups, C group secondary sides, observe the voltage of alternating current ammeter
Value；The indicating value of alternating current ammeter does not occur increase by a relatively large margin with the slow pressurization of AC voltage regulator, and protects always
When holding smaller indicating value, it was demonstrated that B group electromagnetic potential transformers are bad there are turn-to-turn insulation, and pressure regulator is down to zero in time at this time,
Test ending；
Judge 4：The secondary side of A groups with B groups is corresponded into winding parallel connection respectively, by alternating current ammeter and is connected to A groups, the high pressure of B groups
Between winding, and pass through AC voltage regulator and slowly pressurize to the parallel connected end of A groups, B group secondary sides, observe the voltage of alternating current ammeter
Value；When the indicating value of alternating current ammeter increase by a relatively large margin does not occur, and always with the slow pressurization of AC voltage regulator
When keeping smaller indicating value, it was demonstrated that A groups, B groups are all trouble-free electromagnetic potential transformers, C group failures；It at this time can be in order to test
This judgement is demonstrate,proved, by alternating current ammeter and is connected between A groups, the high-voltage winding of C groups, and it is secondary to A groups, C groups to pass through AC voltage regulator
The parallel connected end of side is slowly pressurizeed, and observes the voltage value of alternating current ammeter, indicating value the delaying with AC voltage regulator of alternating current ammeter
There is increase by a relatively large margin in slow pressurization, and when finally keeping larger indicating value, it was demonstrated that there are turn-to-turns for C groups electromagnetic potential transformer
Pressure regulator is down to zero, test ending by defective insulation in time at this time.
Embodiment three
Above-described embodiment mainly consider with fault-free equal in adjacent three electromagnetic potential transformers or have and only one generation
For failure, this can meet most of fault condition and judge, when the two or more electromagnetic potential transformers events of appearance
During barrier, it can be judged according to following principle, i.e., according to one method of embodiment, first in adjacent two electromagnetic potential transformers
Pressurize and measure, when voltmeter instruction it is larger when, illustrate it is bad with the presence of an electromagnetic potential transformer turn-to-turn insulation, and
When pressure regulator is down to zero.The electromagnetic type that the uninflated electromagnetic potential transformer of another has been added into overvoltage with any one again
Voltage transformer repeats above-mentioned experiment.There is all big person of numerical value twice when measuring voltage, illustrate the voltage all to pressurize twice
Mutual inductor is problematic.Only there is primary big person when measuring voltage, the electromagnetic potential transformer for illustrating all to pressurize twice is
Alright, it only pressurizes primary and occurs measuring the electromagnetic potential transformer that the big person of voltage is damage.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, the general technology people of this field
Member using the solution of the present invention it will be recognized that can also realize many optional embodiments.It is all in the spirit and principles in the present invention
Within all any modification, equivalent and improvement made etc., should all be included in the protection scope of the present invention.
Claims (4)
- A kind of 1. method for judging electromagnetic potential transformer turn-to-turn insulation short circuit, which is characterized in that include the following steps：1）The detection device for judging the short circuit of electromagnetic potential transformer turn-to-turn insulation is chosen, including AC voltage regulator one, exchange Voltmeter one；2）By fault-free equal in adjacent three electromagnetic potential transformers to be checked or have and for only one is broken down, it will Three voltage transformers are respectively defined as A groups, B groups, C groups, and the secondary side of A groups with B groups is corresponded to winding parallel connection respectively；3）It by alternating current ammeter and is connected between A groups, the high-voltage winding of B groups, and passes through AC voltage regulator to A groups, B group secondary sides Parallel connected end is slowly pressurizeed, and observes the voltage value of alternating current ammeter；4）When the indicating value of alternating current ammeter increase by a relatively large margin, and one does not occur with the slow pressurization of AC voltage regulator When directly keeping smaller indicating value, it was demonstrated that A groups, B groups are all trouble-free electromagnetic potential transformers；5）It by alternating current ammeter and is connected between B groups, the high-voltage winding of C groups, and passes through AC voltage regulator to B groups, C group secondary sides Parallel connected end is slowly pressurizeed, and observes the voltage value of alternating current ammeter；6）When the indicating value of alternating current ammeter increase by a relatively large margin, and one does not occur with the slow pressurization of AC voltage regulator When directly keeping smaller indicating value, it was demonstrated that A groups, B groups, C groups are all trouble-free electromagnetic potential transformers, test ending；7）When progress step 3）Afterwards, the indicating value of alternating current ammeter is with the slow increasing of appearance by a relatively large margin of pressurizeing of AC voltage regulator Greatly, when and finally keeping larger indicating value, it was demonstrated that it is bad with the presence of an electromagnetic potential transformer turn-to-turn insulation between A groups, B groups, Pressure regulator is down to zero in time at this time, repeats step 5）；8）When the indicating value of alternating current ammeter is with the slow increase of appearance by a relatively large margin of pressurizeing of AC voltage regulator, and finally keeps During larger indicating value, it was demonstrated that B group electromagnetic potential transformers are bad there are turn-to-turn insulation, pressure regulator are down to zero in time at this time, inspection Test end；9）When progress step 7）Afterwards, the indicating value of alternating current ammeter does not occur by a relatively large margin with the slow pressurization of AC voltage regulator Increase, and when being always maintained at smaller indicating value, it was demonstrated that A group electromagnetic potential transformers are bad there are turn-to-turn insulation, at this time and When pressure regulator is down to zero, test ending；10）When progress step 5）Afterwards, the indicating value of alternating current ammeter occurs by a relatively large margin with the slow pressurization of AC voltage regulator When increasing, and finally keeping larger indicating value, it was demonstrated that C group electromagnetic potential transformers are bad there are turn-to-turn insulation, in time will at this time Pressure regulator is down to zero, test ending；11）When progress step 6）Afterwards, three electromagnetic potential transformers that can be adjacent to next group are according to step 2）To step 10） Method carry out coding check, until checking the electromagnetic potential transformer there are failure.
- 2. the method as described in claim 1 for judging the short circuit of electromagnetic potential transformer turn-to-turn insulation, it is characterised in that：It is described AC voltage regulator is preferably 220V AC voltage regulators.
- 3. the method as described in claim 1 for judging the short circuit of electromagnetic potential transformer turn-to-turn insulation, it is characterised in that：It is described The inspection voltage of AC voltage regulator is no more than 60V.
- 4. the method as described in claim 1 for judging the short circuit of electromagnetic potential transformer turn-to-turn insulation, it is characterised in that：It is described A.C. voltmeter is preferably 750V A.C. voltmeters.
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| CN201711437197.5A CN108152659B (en) | 2017-12-26 | 2017-12-26 | Method for judging turn-to-turn insulation short circuit of electromagnetic voltage transformer |
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| CN201711437197.5A CN108152659B (en) | 2017-12-26 | 2017-12-26 | Method for judging turn-to-turn insulation short circuit of electromagnetic voltage transformer |
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| CN108152659B CN108152659B (en) | 2020-02-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968423A (en) * | 2021-02-06 | 2021-06-15 | 山东理工大学 | Overcurrent protection method for protecting turn-to-turn short circuit fault of low-voltage winding of grounding transformer |
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| CN102778615A (en) * | 2011-05-11 | 2012-11-14 | 大连互感器有限公司 | Error experiment device of zero sequence voltage mutual inductors |
| CN103257334A (en) * | 2013-05-15 | 2013-08-21 | 河南省电力公司平顶山供电公司 | 6-35KV electro-magnetic voltage transformer quick diagnosing instrument and using method |
| CN106771514A (en) * | 2016-11-25 | 2017-05-31 | 国网河南省电力公司平顶山供电公司 | A kind of device and method of quick lookup voltage transformer failure |
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- 2017-12-26 CN CN201711437197.5A patent/CN108152659B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778615A (en) * | 2011-05-11 | 2012-11-14 | 大连互感器有限公司 | Error experiment device of zero sequence voltage mutual inductors |
| CN103257334A (en) * | 2013-05-15 | 2013-08-21 | 河南省电力公司平顶山供电公司 | 6-35KV electro-magnetic voltage transformer quick diagnosing instrument and using method |
| CN106771514A (en) * | 2016-11-25 | 2017-05-31 | 国网河南省电力公司平顶山供电公司 | A kind of device and method of quick lookup voltage transformer failure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968423A (en) * | 2021-02-06 | 2021-06-15 | 山东理工大学 | Overcurrent protection method for protecting turn-to-turn short circuit fault of low-voltage winding of grounding transformer |
| CN112968423B (en) * | 2021-02-06 | 2022-06-17 | 山东理工大学 | Overcurrent protection method for protecting turn-to-turn short circuit fault of low-voltage winding of grounding transformer |
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| CN108152659B (en) | 2020-02-04 |
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