CN104569748B - The pressure resistant test method of high pressure plug-in 35kV power transformer - Google Patents
The pressure resistant test method of high pressure plug-in 35kV power transformer Download PDFInfo
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- CN104569748B CN104569748B CN201410678329.3A CN201410678329A CN104569748B CN 104569748 B CN104569748 B CN 104569748B CN 201410678329 A CN201410678329 A CN 201410678329A CN 104569748 B CN104569748 B CN 104569748B
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Abstract
The present invention relates to a kind of pressure resistant test method more particularly to a kind of pressure resistant test methods of high pressure plug-in 35kV power transformer.Hand hole for installing sleeve → reflux → inspection leakproofness → standing → preheating → ground connection operation → wiring test is opened and sequentially includes the following steps: and hangs in → draining the oil → that → test voltage → applies the hand hole for installing sleeve → disassembly bushing shell for transformer → oil return again → of pressure test → pressure resistance Adjustment Tests → pressure build-up test → disassembly test lead → again to check again for outside.The pressure resistant test method of high pressure plug-in 35kV power transformer is compact-sized, and test operation is easy, promotes safety in utilization.
Description
Technical field
The present invention relates to a kind of pressure resistant test method more particularly to a kind of pressure resistances of high pressure plug-in 35kV power transformer
Test method.
Background technique
With the rapid development of power industry, requirement of the client to power product especially transformer is also higher and higher, no
It requires nothing more than product quality performance to reach a standard, there are also to product appearance and operated with particular/special requirement.Applying pressure test outside is also to examine
The basic insulation of nucleus product major insulation voltage strength is tested, and is whether discovery insulation is reasonable, insulating materials has zero defect and manufacture
Whether technique is one of the important means of reasonable, due to the particularity of plug-in cable head, can not be directly according to conventional transformer
Pressure resistant test method.
Summary of the invention
The present invention mainly solves the deficiencies in the prior art, provides a kind of compact-sized, further promotes product
Quality improves the pressure resistant test method of the high pressure plug-in 35kV power transformer of safety.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals:
A kind of pressure resistant test method of high pressure plug-in 35kV power transformer, sequentially includes the following steps:
(1), it hangs in:
Transformer to be tested is hung in into laboratory designated position；
(2), it drains the oil:
Transformer oil filling pipe is accessed into fuel outlet valve, valve is opened according to transformer hand hole for installing sleeve position and calculates change
Depressor needs the weight released, until transformer oil is released from 100mm under hand hole for installing sleeve;
(3), hand hole for installing sleeve is opened:
After oil level is put into designated position, it will be opened until transformer hand hole for installing sleeve；Select ordinary porcelain bushing
BLQW-35/600 installs respective sleeve in O, A, B, C respectively；
(4), it flows back:
Again oil fuel tube is accessed into pouring orifice, by transformer oil injection transformer, oil surface level arrival meets defined position
Set, to oil filled bushing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, conservator successively from low to high to convex portion
It deflates, until flowing oil, checks again for oil level instruction；
(5), leakproofness is checked:
It checks the sealing situation of transformer, the sealing ring of sleeve position, and has checked whether transformer oil exudation；
(6), it stands:
Inspection finishes, and puts transformer is quiet 12 hours；
(7), it preheats:
Whether there is or not insecurity factor presence for checkout facility environment；It is preheated if no, ac voltage withstanding testing transformer is switched on
5min is checked whether the test equipment is placed in the voltage gear required for the test, and whether adjusting leakage current values meet the requirements；
(8), ground connection operation:
By the A of bushing shell for transformer, B, C three-phase is connected with bare copper wire short circuit, and remaining winding is connected with bare copper wire short circuit, and with
Shell is grounded together；Protective ball gap, divider, the effective reliable ground of grounding rod；
(9), wiring is tested:
By the high-pressure side wiring of high voltage control case and testing transformer, regulated power supply is connected with conducting wire, testing transformer,
Protective resistance, step-up side, protective ball gap high pressure end and pressure divider high pressure end；
(10), test voltage:
The waveform of test voltage answers approximate sine wave, and the frequency of test voltage should be less than 80% rated frequency；Testing transformer
Under test voltage, steady-state shortcircuit current should be less than 1A；
(11), pressure test is applied outside:
With external industrial frequency AC high pressure 85kV, it is applied to the winding terminals of the tested transformer, winding each section is in
In idiostatic situation, power-frequency voltage 1min is born；
(12), pressure-resistant Adjustment Tests:
Protective ball gap gap is adjusted, it is corresponding to 1.1 ~ 1.2 times of test voltage, do not puncture three times continuously, is opened every time from zero
Begin to boost, to discharge when pressure resistance adjustment ball gap every time；
(13), pressure build-up test:
Start from scratch boosting, voltage is increased slowly with the speed of 2-3kV/s, after test voltage reaches 75%, makes the rate of rise
The withstanding voltage for keeping per second 2% continues 1min after being added to test voltage, test voltage is uniformly then down to zero point as early as possible,
Power supply, final cutting power supply are successively closed again；
(14), test lead is dismantled:
By porcelain vase discharge treatment, dismantling connection test lead；
(15), hand hole for installing sleeve again:
Transformer oil filling pipe is accessed into fuel outlet valve again, opens valve, according to transformer hand hole for installing sleeve position, is calculated
Transformer needs the weight released out, until transformer oil is released from 100mm under hand hole for installing sleeve;
(16), bushing shell for transformer is dismantled:
Bushing shell for transformer BLQW-35/600 is dismantled, accesses plug-in connection cable head from hand hole position by winding leads,
Wire length is configured according to actual range；
(17), increase sealing ring cover:
Sealing plate encryption seal is covered again, is then fastened；
(18), oil return again:
Oil fuel tube is accessed into pouring orifice again, by transformer oil injection transformer, oil surface level arrival meets defined position
It sets, the convex portion deflation of the tubing and casing that liquidates, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, until flowing oil,
Check again for oil level instruction；
(19), it checks again for:
Check again for until hand hole and cable plug head that whether there is or not permeabilitys.
Therefore, the pressure resistant test method of high pressure plug-in 35kV power transformer of the invention, compact-sized, test operation
Simplicity promotes safety in utilization.
Specific embodiment
Below by embodiment, the technical solutions of the present invention will be further described.
Embodiment 1: a kind of pressure resistant test method of high pressure plug-in 35kV power transformer sequentially includes the following steps:
(1), it hangs in:
Transformer to be tested is hung in into laboratory designated position；
(2), it drains the oil:
Transformer oil filling pipe is accessed into fuel outlet valve, valve is opened according to transformer hand hole for installing sleeve position and calculates change
Depressor needs the weight released, until transformer oil is released from 100mm under hand hole for installing sleeve;
(3), hand hole for installing sleeve is opened:
After oil level is put into designated position, it will be opened until transformer hand hole for installing sleeve；Select ordinary porcelain bushing
BLQW-35/600 installs respective sleeve in O, A, B, C respectively；
(4), it flows back:
Again oil fuel tube is accessed into pouring orifice, by transformer oil injection transformer, oil surface level arrival meets defined position
Set, to oil filled bushing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, conservator successively from low to high to convex portion
It deflates, until flowing oil, checks again for oil level instruction；
(5), leakproofness is checked:
It checks the sealing situation of transformer, the sealing ring of sleeve position, and has checked whether transformer oil exudation；
(6), it stands:
Inspection finishes, and puts transformer is quiet 12 hours；
(7), it preheats:
Whether there is or not insecurity factor presence for checkout facility environment；It is preheated if no, ac voltage withstanding testing transformer is switched on
5min is checked whether the test equipment is placed in the voltage gear required for the test, and whether adjusting leakage current values meet the requirements；
(8), ground connection operation:
By the A of bushing shell for transformer, B, C three-phase is connected with bare copper wire short circuit, and remaining winding is connected with bare copper wire short circuit, and with
Shell is grounded together；Protective ball gap, divider, the effective reliable ground of grounding rod；
(9), wiring is tested:
By the high-pressure side wiring of high voltage control case and testing transformer, regulated power supply is connected with conducting wire, testing transformer,
Protective resistance, step-up side, protective ball gap high pressure end and pressure divider high pressure end；
(10), test voltage:
The waveform of test voltage answers approximate sine wave, and the frequency of test voltage should be less than 80% rated frequency；Testing transformer
Under test voltage, steady-state shortcircuit current should be less than 1A；
(11), pressure test is applied outside:
With external industrial frequency AC high pressure 85kV, it is applied to the winding terminals of the tested transformer, winding each section is in
In idiostatic situation, power-frequency voltage 1min is born；
(12), pressure-resistant Adjustment Tests:
Protective ball gap gap is adjusted, it is corresponding to 1.1 times of test voltage, do not puncture three times continuously, liter of starting from scratch every time
Pressure will discharge when pressure resistance adjustment ball gap every time；
(13), pressure build-up test:
Start from scratch boosting, voltage is increased slowly with the speed of 2kV/s, after test voltage reaches 75%, protects the rate of rise
The withstanding voltage for holding per second 2% continues 1min after being added to test voltage, test voltage is uniformly then down to zero point as early as possible, then
Successively close power supply, final cutting power supply；
(14), test lead is dismantled:
By porcelain vase discharge treatment, dismantling connection test lead；
(15), hand hole for installing sleeve again:
Transformer oil filling pipe is accessed into fuel outlet valve again, opens valve, according to transformer hand hole for installing sleeve position, is calculated
Transformer needs the weight released out, until transformer oil is released from 100mm under hand hole for installing sleeve;
(16), bushing shell for transformer is dismantled:
Bushing shell for transformer BLQW-35/600 is dismantled, accesses plug-in connection cable head from hand hole position by winding leads,
Wire length is configured according to actual range；
(17), increase sealing ring cover:
Sealing plate encryption seal is covered again, is then fastened；
(18), oil return again:
Oil fuel tube is accessed into pouring orifice again, by transformer oil injection transformer, oil surface level arrival meets defined position
It sets, the convex portion deflation of the tubing and casing that liquidates, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, until flowing oil,
Check again for oil level instruction；
(19), it checks again for:
Check again for until hand hole and cable plug head that whether there is or not permeabilitys.
Embodiment 2: a kind of pressure resistant test method of high pressure plug-in 35kV power transformer sequentially includes the following steps:
(1), it hangs in:
Transformer to be tested is hung in into laboratory designated position；
(2), it drains the oil:
Transformer oil filling pipe is accessed into fuel outlet valve, valve is opened according to transformer hand hole for installing sleeve position and calculates change
Depressor needs the weight released, until transformer oil is released from 100mm under hand hole for installing sleeve;
(3), hand hole for installing sleeve is opened:
After oil level is put into designated position, it will be opened until transformer hand hole for installing sleeve；Select ordinary porcelain bushing
BLQW-35/600 installs respective sleeve in O, A, B, C respectively；
(4), it flows back:
Again oil fuel tube is accessed into pouring orifice, by transformer oil injection transformer, oil surface level arrival meets defined position
Set, to oil filled bushing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, conservator successively from low to high to convex portion
It deflates, until flowing oil, checks again for oil level instruction；
(5), leakproofness is checked:
It checks the sealing situation of transformer, the sealing ring of sleeve position, and has checked whether transformer oil exudation；
(6), it stands:
Inspection finishes, and puts transformer is quiet 12 hours；
(7), it preheats:
Whether there is or not insecurity factor presence for checkout facility environment；It is preheated if no, ac voltage withstanding testing transformer is switched on
5min is checked whether the test equipment is placed in the voltage gear required for the test, and whether adjusting leakage current values meet the requirements；
(8), ground connection operation:
By the A of bushing shell for transformer, B, C three-phase is connected with bare copper wire short circuit, and remaining winding is connected with bare copper wire short circuit, and with
Shell is grounded together；Protective ball gap, divider, the effective reliable ground of grounding rod；
(9), wiring is tested:
By the high-pressure side wiring of high voltage control case and testing transformer, regulated power supply is connected with conducting wire, testing transformer,
Protective resistance, step-up side, protective ball gap high pressure end and pressure divider high pressure end；
(10), test voltage:
The waveform of test voltage answers approximate sine wave, and the frequency of test voltage should be less than 80% rated frequency；Testing transformer
Under test voltage, steady-state shortcircuit current should be less than 1A；
(11), pressure test is applied outside:
With external industrial frequency AC high pressure 85kV, it is applied to the winding terminals of the tested transformer, winding each section is in
In idiostatic situation, power-frequency voltage 1min is born；
(12), pressure-resistant Adjustment Tests:
Protective ball gap gap is adjusted, it is corresponding to 1.15 times of test voltage, do not puncture three times continuously, liter of starting from scratch every time
Pressure will discharge when pressure resistance adjustment ball gap every time；
(13), pressure build-up test:
Start from scratch boosting, voltage is increased slowly with the speed of 2.5kV/s, after test voltage reaches 75%, makes the rate of rise
The withstanding voltage for keeping per second 2% continues 1min after being added to test voltage, test voltage is uniformly then down to zero point as early as possible,
Power supply, final cutting power supply are successively closed again；
(14), test lead is dismantled:
By porcelain vase discharge treatment, dismantling connection test lead；
(15), hand hole for installing sleeve again:
Transformer oil filling pipe is accessed into fuel outlet valve again, opens valve, according to transformer hand hole for installing sleeve position, is calculated
Transformer needs the weight released out, until transformer oil is released from 100mm under hand hole for installing sleeve;
(16), bushing shell for transformer is dismantled:
Bushing shell for transformer BLQW-35/600 is dismantled, accesses plug-in connection cable head from hand hole position by winding leads,
Wire length is configured according to actual range；
(17), increase sealing ring cover:
Sealing plate encryption seal is covered again, is then fastened；
(18), oil return again:
Oil fuel tube is accessed into pouring orifice again, by transformer oil injection transformer, oil surface level arrival meets defined position
It sets, the convex portion deflation of the tubing and casing that liquidates, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, until flowing oil,
Check again for oil level instruction；
(19), it checks again for:
Check again for until hand hole and cable plug head that whether there is or not permeabilitys.
Embodiment 3: a kind of pressure resistant test method of high pressure plug-in 35kV power transformer sequentially includes the following steps:
(1), it hangs in:
Transformer to be tested is hung in into laboratory designated position；
(2), it drains the oil:
Transformer oil filling pipe is accessed into fuel outlet valve, valve is opened according to transformer hand hole for installing sleeve position and calculates change
Depressor needs the weight released, until transformer oil is released from 100mm under hand hole for installing sleeve;
(3), hand hole for installing sleeve is opened:
After oil level is put into designated position, it will be opened until transformer hand hole for installing sleeve；Select ordinary porcelain bushing
BLQW-35/600 installs respective sleeve in O, A, B, C respectively；
(4), it flows back:
Again oil fuel tube is accessed into pouring orifice, by transformer oil injection transformer, oil surface level arrival meets defined position
Set, to oil filled bushing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, conservator successively from low to high to convex portion
It deflates, until flowing oil, checks again for oil level instruction；
(5), leakproofness is checked:
It checks the sealing situation of transformer, the sealing ring of sleeve position, and has checked whether transformer oil exudation；
(6), it stands:
Inspection finishes, and puts transformer is quiet 12 hours；
(7), it preheats:
Whether there is or not insecurity factor presence for checkout facility environment；It is preheated if no, ac voltage withstanding testing transformer is switched on
5min is checked whether the test equipment is placed in the voltage gear required for the test, and whether adjusting leakage current values meet the requirements；
(8), ground connection operation:
By the A of bushing shell for transformer, B, C three-phase is connected with bare copper wire short circuit, and remaining winding is connected with bare copper wire short circuit, and with
Shell is grounded together；Protective ball gap, divider, the effective reliable ground of grounding rod；
(9), wiring is tested:
By the high-pressure side wiring of high voltage control case and testing transformer, regulated power supply is connected with conducting wire, testing transformer,
Protective resistance, step-up side, protective ball gap high pressure end and pressure divider high pressure end；
(10), test voltage:
The waveform of test voltage answers approximate sine wave, and the frequency of test voltage should be less than 80% rated frequency；Testing transformer
Under test voltage, steady-state shortcircuit current should be less than 1A；
(11), pressure test is applied outside:
With external industrial frequency AC high pressure 85kV, it is applied to the winding terminals of the tested transformer, winding each section is in
In idiostatic situation, power-frequency voltage 1min is born；
(12), pressure-resistant Adjustment Tests:
Protective ball gap gap is adjusted, it is corresponding to 1.2 times of test voltage, do not puncture three times continuously, liter of starting from scratch every time
Pressure will discharge when pressure resistance adjustment ball gap every time；
(13), pressure build-up test:
Start from scratch boosting, voltage is increased slowly with the speed of 3kV/s, after test voltage reaches 75%, protects the rate of rise
The withstanding voltage for holding per second 2% continues 1min after being added to test voltage, test voltage is uniformly then down to zero point as early as possible, then
Successively close power supply, final cutting power supply；
(14), test lead is dismantled:
By porcelain vase discharge treatment, dismantling connection test lead；
(15), hand hole for installing sleeve again:
Transformer oil filling pipe is accessed into fuel outlet valve again, opens valve, according to transformer hand hole for installing sleeve position, is calculated
Transformer needs the weight released out, until transformer oil is released from 100mm under hand hole for installing sleeve;
(16), bushing shell for transformer is dismantled:
Bushing shell for transformer BLQW-35/600 is dismantled, accesses plug-in connection cable head from hand hole position by winding leads,
Wire length is configured according to actual range；
(17), increase sealing ring cover:
Sealing plate encryption seal is covered again, is then fastened；
(18), oil return again:
Oil fuel tube is accessed into pouring orifice again, by transformer oil injection transformer, oil surface level arrival meets defined position
It sets, the convex portion deflation of the tubing and casing that liquidates, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, until flowing oil,
Check again for oil level instruction；
(19), it checks again for:
Check again for until hand hole and cable plug head that whether there is or not permeabilitys.
Claims (1)
1. a kind of pressure resistant test method of high pressure plug-in 35kV power transformer, it is characterised in that sequentially include the following steps:
(1), it hangs in:
Transformer to be tested is hung in into laboratory designated position；
(2), it drains the oil:
Transformer oil filling pipe is accessed into fuel outlet valve, valve is opened according to transformer hand hole for installing sleeve position and calculates transformer
The weight for needing to release, until transformer oil is released from 100mm under hand hole for installing sleeve；
(3), hand hole for installing sleeve is opened:
After oil level is put into designated position, transformer hand hole for installing sleeve is opened；Select ordinary porcelain bushing BLQW-35/
600, respective sleeve is installed respectively in 0 phase, A phase, B phase, C phase；
(4), it flows back:
Again oil fuel tube is accessed into pouring orifice, by transformer oil injection transformer, oil surface level arrival meets defined position, right
Oil filled bushing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors, conservator successively from low to high to convex portion deflate,
Until flowing oil, oil level instruction variation is checked；
(5), leakproofness is checked:
It checks the sealing situation of transformer: the sealing ring of sleeve position and having checked whether transformer oil exudation；
(6), it stands:
Inspection finishes, and puts transformer is quiet 12 hours；
(7), it preheats:
Whether there is or not insecurity factor presence for checkout facility environment；If no, ac voltage withstanding testing transformer, which is switched on, preheats 5min,
It checks whether the test equipment is placed in the voltage gear required for the test, whether adjusting leakage current values meet the requirements；
(8), ground connection operation:
By the A of bushing shell for transformer, B, C three-phase is connected with bare copper wire short circuit, and remaining winding is connected with bare copper wire short circuit, and and shell
It is grounded together；Protective ball gap, divider, the effective reliable ground of grounding rod；
(9), wiring is tested:
By the high-pressure side wiring of high voltage control case and testing transformer, regulated power supply, testing transformer, guarantor are connected with conducting wire
Protect resistance, step-up side, protective ball gap high pressure end and pressure divider high pressure end；
(10), test voltage:
The waveform of test voltage answers approximate sine wave, and the frequency of test voltage should be less than 80% rated frequency；Testing transformer exists
Under test voltage, steady-state shortcircuit current should be less than 1A；
(11), pressure test is applied outside:
It with external industrial frequency AC high pressure 85kV, is applied to the winding terminals of the tested transformer, winding each section is in electricity
In the case where position, power-frequency voltage 1min is born；
(12), pressure-resistant Adjustment Tests:
Protective ball gap gap is adjusted, it is corresponding to 1.1~1.2 times of test voltage, do not puncture three times continuously, liter of starting from scratch every time
Pressure will discharge when pressure resistance adjustment ball gap every time；
(13), pressure build-up test:
Start from scratch boosting, voltage is increased slowly with the speed of 2-3kV/s, after test voltage reaches 75%, protects the rate of rise
The withstanding voltage for holding per second 2% continues 1min after being added to test voltage, test voltage is uniformly then down to zero point as early as possible,
Power supply, final cutting power supply are successively closed again；
(14), test lead is dismantled:
By casing discharge treatment, test lead is dismantled；
(15), hand hole for installing sleeve again:
Transformer oil filling pipe is accessed into fuel outlet valve again, valve is opened according to transformer hand hole for installing sleeve position and calculates change
Depressor needs the weight released, until transformer oil is released from 100mm under hand hole for installing sleeve；
(16), bushing shell for transformer is dismantled:
Bushing shell for transformer BLQW-35/600 is dismantled, accesses plug-in connection cable head, lead from hand hole position by winding leads
Length is configured according to actual range；
(17), increase sealing ring cover:
Sealing plate encryption seal is covered again, is then fastened；
(18), oiling again:
Oil fuel tube is accessed into pouring orifice again, by transformer oil injection transformer, oil surface level arrival meets defined position, right
The convex portion deflation for rushing tubing and casing, load ratio bridging switch, bushing lifting seat, low voltage electrical connectors is examined again until flowing oil
Look into oil level instruction；
(19), leakproofness is checked again for:
Check again for the sealing situation of transformer: whether the sealing ring of sleeve position and periphery have transformer oil exudation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678329.3A CN104569748B (en) | 2014-11-24 | 2014-11-24 | The pressure resistant test method of high pressure plug-in 35kV power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678329.3A CN104569748B (en) | 2014-11-24 | 2014-11-24 | The pressure resistant test method of high pressure plug-in 35kV power transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104569748A CN104569748A (en) | 2015-04-29 |
| CN104569748B true CN104569748B (en) | 2019-02-01 |
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ID=53086279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410678329.3A Active CN104569748B (en) | 2014-11-24 | 2014-11-24 | The pressure resistant test method of high pressure plug-in 35kV power transformer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276402A (en) * | 1992-02-28 | 1994-01-04 | Hipotronics, Inc. | Three-phase transformer testing method and system |
| CN101145433A (en) * | 2007-08-21 | 2008-03-19 | 山东达驰电气股份有限公司 | Transformer conducting bar and winding leads connection structure |
| CN102110520A (en) * | 2010-12-30 | 2011-06-29 | 陕西化建工程有限责任公司 | Construction process for installing and debugging large transformer |
| CN102879697A (en) * | 2012-10-30 | 2013-01-16 | 中国二十二冶集团有限公司 | Optimized power transformer testing method |
| CN103163436A (en) * | 2013-04-07 | 2013-06-19 | 株洲市变压器有限公司 | Method and device for switching high voltage and low voltage and automatically reducing high voltage in withstand voltage test of transformer |
-
2014
- 2014-11-24 CN CN201410678329.3A patent/CN104569748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276402A (en) * | 1992-02-28 | 1994-01-04 | Hipotronics, Inc. | Three-phase transformer testing method and system |
| CN101145433A (en) * | 2007-08-21 | 2008-03-19 | 山东达驰电气股份有限公司 | Transformer conducting bar and winding leads connection structure |
| CN102110520A (en) * | 2010-12-30 | 2011-06-29 | 陕西化建工程有限责任公司 | Construction process for installing and debugging large transformer |
| CN102879697A (en) * | 2012-10-30 | 2013-01-16 | 中国二十二冶集团有限公司 | Optimized power transformer testing method |
| CN103163436A (en) * | 2013-04-07 | 2013-06-19 | 株洲市变压器有限公司 | Method and device for switching high voltage and low voltage and automatically reducing high voltage in withstand voltage test of transformer |
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| Publication number | Publication date |
|---|---|
| CN104569748A (en) | 2015-04-29 |
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