CN110086149A - Leak(age) test, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application - Google Patents
Leak(age) test, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application Download PDFInfo
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- CN110086149A CN110086149A CN201910347453.4A CN201910347453A CN110086149A CN 110086149 A CN110086149 A CN 110086149A CN 201910347453 A CN201910347453 A CN 201910347453A CN 110086149 A CN110086149 A CN 110086149A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention belongs to industrial and mineral technical fields, especially leak(age) test, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application, including the compatible malfunction module of leakage experiment leapfrog mode hopping block and mobile substation, the compatible malfunction module in mobile substation include for total power distribution unit, distribution electric unit, mobile voltage transformation unit and increase feed element, further include that leak(age) test bypasses the immediate leadership and jumps malfunction System Utilization Procedure compatible with mobile substation.The present invention utilizes the compatible malfunction module of the leakage experiment leapfrog mode hopping block of setting and mobile substation; entire significant effect; effectively the leapfrog of feeding switch is avoided to jump situation; it realizes mobile substation and feed compatibling problem, reduces scope of power outage, improve protector sensitivity; guarantee for reliability; influence time is reduced, safety accident is avoided, improves the security performance of bulk supply circuit.
Description
Technical field
The present invention relates to industrial and mineral technical field more particularly to leak(age) test bypass the immediate leadership jump malfunction compatible with mobile substation and
Using.
Background technique
" safety regulations in coal mine " regulation Coal Mine Feeder Switch must do daily a leak(age) test with leak(age) test function,
There can be no jump or the misactions of bypassing the immediate leadership.But global each mine occur the test of low voltage feeder creepage protection function bypass the immediate leadership jump and
Misaction occurs, and there are also mobile substation and feed incompatibility problem, part mine takes shielding is mobile to become station leakage function,
There are hidden troubles, and protective relaying device (requirement of four property) selectivity, speed, sensitivity, reliability is not achieved, and give supply lines
Bring security risk in road.It cannot be guaranteed personal safety, can not prevent electric spark from generating.State Bureau and security bureau find more mines all
It gives fine to put on record processing, needs leak(age) test to bypass the immediate leadership thus and jump malfunction compatible with mobile substation and application.
Summary of the invention
Leak(age) test proposed by the present invention, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application, solves the prior art
There are the problem of.
To achieve the goals above, present invention employs following technical solutions:
Leak(age) test, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, including leakage experiment leapfrog mode hopping block and mobile substation
Compatible malfunction module, the compatible malfunction module in the mobile substation include for becoming with total power distribution unit, distribution electric unit, movement
It presses unit and increases feed element, the leakage experiment leapfrog mode hopping includes level-one residual current protective unit, second level earth leakage protective list
Member, three-level residual current protective unit, level Four residual current protective unit, end residual current protective unit bypass the immediate leadership and jump signal acquisition unit, bypass the immediate leadership
It jumps signal processing unit and regulation unit, total power distribution unit, distribution electric unit, mobile voltage transformation unit and increase feedback is jumped in leapfrog
Electric unit is sequentially connected, and increases feed element, level-one residual current protective unit, second level residual current protective unit, level Four earth leakage protective list
Member and end residual current protective unit are sequentially connected, and three-level residual current protective unit is connected with level Four residual current protective unit, are bypassed the immediate leadership and are jumped letter
Number acquisition unit bypasses the immediate leadership to jump signal processing unit and bypass the immediate leadership and jumps regulation unit and be sequentially connected, and bypasses the immediate leadership and jumps signal acquisition unit and one
Grade residual current protective unit, second level residual current protective unit, three-level residual current protective unit, level Four residual current protective unit and end electric leakage are protected
Unit connection is protected, bypasses the immediate leadership and jumps regulation unit and level-one residual current protective unit, second level residual current protective unit, three-level earth leakage protective list
Member, level Four residual current protective unit are connected with end residual current protective unit.
Leak(age) test, which is bypassed the immediate leadership, jumps malfunction System Utilization Procedure compatible with mobile substation, the steps include:
S1, determine mobile voltage transformation unit and increase at a distance from feed element and the output power of mobile voltage transformation unit feeder ear and
Power supply line's length；
S2, the low pressure sampling plate in mobile voltage transformation unit is increased to electrolytic capacitor, while by increased electrolytic capacitor and increases feedback
Electric unit is attached；
S3, signal acquisition unit real-time monitoring level-one residual current protective unit, second level residual current protective unit, three-level leakage are jumped using bypassing the immediate leadership
The residual voltage current information of electric protection unit and level Four residual current protective unit operation, and the information of monitoring is transmitted to more
Grade jumps signal processing unit, and the data that final leapfrog jump regulation unit is obtained according to processing are to level-one residual current protective unit, second level
Residual current protective unit, the time delay condition of three-level residual current protective unit and level Four residual current protective unit at work are set,
Mode is concurrently set to leak electricity according to level-one residual current protective unit to second level residual current protective unit, three-level residual current protective unit and level Four
Gradually successively decrease in the direction of protection location.
Preferably, total power distribution unit carries out rectification seamless regulation to the alternating current of input, and distribution electric unit will be used for city
Electricity electricity consumption adjusted is shunted, and the electricity consumption after shunting is carried out transformation regulation by mobile voltage transformation unit according to actual needs, is increased
Add feed element for carrying out compatible allotment to mobile voltage transformation unit.
Preferably, the level-one residual current protective unit is used to carry out the electricity consumption after transformation level-one leakage protection, second level leakage
Electric protection unit is used to carry out the electricity consumption after transformation second level leakage protection, and three-level residual current protective unit is used for the use after transformation
Electricity carries out three-level leakage protection, and level Four residual current protective unit is used to carry out the electricity consumption after transformation level Four leakage protection, end leakage
Electric protection unit is used to carry out isolating and protecting to the electricity consumption after transformation, and jump signal acquisition unit of bypassing the immediate leadership is protected for acquiring level-one electric leakage
Protect the residual voltage of unit, second level residual current protective unit, three-level residual current protective unit and level Four residual current protective unit operation
Current information bypasses the immediate leadership and jumps signal processing unit for the residual voltage current information of acquisition to be carried out processing conversion, bypasses the immediate leadership to jump and adjust
Control unit is protected for controlling level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four electric leakage
Protect the time delay condition of unit at work.
Preferably, the level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four leakage
Electric protection unit is all made of model BKD20-400 Protection for Mine Vacuum Feed Switch, and end residual current protective unit uses KBZ20-400
Vacuum feed switch.
Preferably, total power distribution unit uses PBG-400 mineral high-voltage vacuum distribution device for explosion-proof type permanent, point
Power distribution unit uses PBG-200 mineral high-voltage vacuum distribution device for explosion-proof type permanent, and mobile voltage transformation unit uses KBSGZY-
166 mobile substation.
In the present invention,
The compatible malfunction module of leakage experiment leapfrog mode hopping block and mobile substation of design utilization setting, entire significant effect,
It effectively avoids the leapfrog of feeding switch from jumping situation, realizes mobile substation and feed compatibling problem, reduce scope of power outage,
Protector sensitivity is improved, guarantees to reduce influence time for reliability, avoids safety accident, improve bulk supply circuit
Security performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that malfunction system compatible with mobile substation is jumped in leak(age) test proposed by the present invention leapfrog；
Fig. 2 is that malfunction system leakage experiment leapfrog mode hopping block compatible with mobile substation is jumped in leak(age) test proposed by the present invention leapfrog
Structural schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-2, leak(age) test, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, including leakage experiment leapfrog mode hopping
The compatible malfunction module of block and mobile substation, the compatible malfunction module in mobile substation include for electric with total power distribution unit, distribution
Unit, mobile voltage transformation unit and increase feed element, leakage experiment leapfrog mode hopping include level-one residual current protective unit, second level electric leakage
Protection location, level Four residual current protective unit, end residual current protective unit, bypasses the immediate leadership and jumps signal acquisition list at three-level residual current protective unit
Member bypasses the immediate leadership to jump signal processing unit and bypass the immediate leadership and jumps regulation unit, total power distribution unit, distribution electric unit, mobile voltage transformation unit and increasing
Add feed element to be sequentially connected, increases feed element, level-one residual current protective unit, second level residual current protective unit, level Four electric leakage guarantor
Shield unit and end residual current protective unit are sequentially connected, and three-level residual current protective unit is connected with level Four residual current protective unit, are bypassed the immediate leadership
It jumps signal acquisition unit, leapfrog jump signal processing unit and jump regulation unit of bypassing the immediate leadership is sequentially connected, leapfrog jump signal acquisition unit
It is leaked with level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit, level Four residual current protective unit and end
Electric protection unit connection, bypasses the immediate leadership and jumps regulation unit and level-one residual current protective unit, second level residual current protective unit, three-level earth leakage protective
Unit, level Four residual current protective unit are connected with end residual current protective unit.
Leak(age) test, which is bypassed the immediate leadership, jumps malfunction System Utilization Procedure compatible with mobile substation, the steps include:
S1, determine mobile voltage transformation unit and increase at a distance from feed element and the output power of mobile voltage transformation unit feeder ear and
Power supply line's length；
S2, the low pressure sampling plate in mobile voltage transformation unit is increased to electrolytic capacitor, while by increased electrolytic capacitor and increases feedback
Electric unit is attached；
S3, signal acquisition unit real-time monitoring level-one residual current protective unit, second level residual current protective unit, three-level leakage are jumped using bypassing the immediate leadership
The residual voltage current information of electric protection unit and level Four residual current protective unit operation, and the information of monitoring is transmitted to more
Grade jumps signal processing unit, and the data that final leapfrog jump regulation unit is obtained according to processing are to level-one residual current protective unit, second level
Residual current protective unit, the time delay condition of three-level residual current protective unit and level Four residual current protective unit at work are set,
Mode is concurrently set to leak electricity according to level-one residual current protective unit to second level residual current protective unit, three-level residual current protective unit and level Four
Gradually successively decrease in the direction of protection location.
Further, total power distribution unit carries out rectification seamless regulation to the alternating current of input, and distribution electric unit will be used for alternating current
Electricity consumption adjusted is shunted, and the electricity consumption after shunting is carried out transformation regulation by mobile voltage transformation unit according to actual needs, is increased
Feed element is used to carry out compatible allotment to mobile voltage transformation unit.
Especially, level-one residual current protective unit is used to carry out the electricity consumption after transformation level-one leakage protection, and second level electric leakage is protected
Protect unit be used for after transformation electricity consumption carry out second level leakage protection, three-level residual current protective unit be used for the electricity consumption after transformation into
Row three-level leakage protection, level Four residual current protective unit are used to carry out the electricity consumption after transformation level Four leakage protection, and end electric leakage is protected
It protects unit to be used to carry out isolating and protecting to the electricity consumption after transformation, bypasses the immediate leadership and jump signal acquisition unit for acquiring level-one earth leakage protective list
The residual voltage electric current of member, second level residual current protective unit, three-level residual current protective unit and level Four residual current protective unit operation
Information bypasses the immediate leadership and jumps signal processing unit for the residual voltage current information of acquisition to be carried out processing conversion, and bypassing the immediate leadership, it is single to jump regulation
Member is for controlling level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four earth leakage protective list
The time delay condition of member at work.
In addition, level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four earth leakage protective
Unit is all made of model BKD20-400 Protection for Mine Vacuum Feed Switch, and end residual current protective unit is presented using KBZ20-400 vacuum
Electric switch.
In addition to this, total power distribution unit uses PBG-400 mineral high-voltage vacuum distribution device for explosion-proof type permanent, distribution
Electric unit uses PBG-200 mineral high-voltage vacuum distribution device for explosion-proof type permanent, and mobile voltage transformation unit uses KBSGZY-
166 mobile substation increases feed element and uses KBZ20-400 vacuum feed switch；
Embodiment one:
Output power determination mobile voltage transformation unit first and increase at a distance from feed element and move voltage transformation unit feeder ear
With power supply line's length, when mobile voltage transformation unit and when increasing feed element and being arranged within 5 meters, by the leakage of mobile voltage transformation unit
Electricity delay setting 0.2S increases electric leakage delay the setting 0.0S, residual voltage UO:1.5V, zero-sequence current IO of feed element:
The 22UF/25V anode of increased electrolytic capacitor, is connect 17 lines for increasing feed element by 1.5A, and increased electrolytic capacitor cathode connects
Increase by 18 lines of feed element；When 200 meters of feed element distance of mobile voltage transformation unit and increase or more, mobile voltage transformation unit leakage
Electricity delay setting 0.2S increases feed element electric leakage delay setting 0.0S, residual voltage UO1.3V, zero-sequence current IO1.3mA；When
When power supply line's length of mobile voltage transformation unit is more than the equipment that 800 meters and/or startup power are greater than 1200KW, increased electrolysis
Capacitor carries out capacitor supplement voltage and springs up；
Embodiment two:
It is artificial to determine power supply line branch's capacitive sensing electric current and residual voltage over the ground according to power supply line's length, take zero sequence electric
Stream and residual voltage value jump signal processing unit and bypass the immediate leadership as leapfrog jumps the foundation of unit comparison and regulation, utilizes leapfrog
Jump signal acquisition unit real-time monitoring level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and four
The residual voltage current information of grade residual current protective unit operation, then bypass the immediate leadership jump the numerical value that will test of signal processing unit with
It is artificial to determine power supply line branch's capacitive sensing electric current and residual voltage numerical value carry out effect over the ground, bypass the immediate leadership jump regulation unit according to
The data of comparison are to level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four earth leakage protective
Data on unit are set, and concurrently set mode according to level-one residual current protective unit to second level residual current protective unit, three-level
The direction of residual current protective unit and level Four residual current protective unit is gradually successively decreased, wherein one group of data setting are as follows: level-one earth leakage protective
Unit delay setting 200ms(safety regulations in coal mine regulation, which leaks electricity to be delayed, must not exceed 0.2 second=200ms), second level earth leakage protective list
Member, which is delayed, is arranged 130ms setting UO:1.2V, IO:1.2mA, three-level residual current protective unit delay setting 90ms setting UO:1.2V,
IO:1.2mA, the delay of fourth stage residual current protective unit are that UO:1.3V, IO:1.3mA is arranged in 0ms.
Using the compatible malfunction module of the leakage experiment leapfrog mode hopping block of setting and mobile substation, entire effect is aobvious for the design
It writes, the leapfrog of feeding switch is effectively avoided to jump situation, realize mobile substation and feed compatibling problem, reduce power failure model
It encloses, improves protector sensitivity, guarantee to reduce influence time for reliability, avoid safety accident, improve bulk supply electricity
The security performance on road.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
It is " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relatively important
Property or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Person implicitly includes one or more of the features.In the description of the present invention, the meaning of " plurality " is two or two with
On, unless otherwise specifically defined.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. leak(age) test, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, including leakage experiment leapfrog mode hopping block and mobile power transformation
Stand compatible malfunction module, which is characterized in that the compatible malfunction module in the mobile substation include for total power distribution unit, distribution
Electric unit, mobile voltage transformation unit and increase feed element, the leakage experiment leapfrog mode hopping includes level-one residual current protective unit, two
Grade residual current protective unit, level Four residual current protective unit, end residual current protective unit, bypasses the immediate leadership and jumps signal at three-level residual current protective unit
Acquisition unit bypasses the immediate leadership and jumps signal processing unit and leapfrog jump regulation unit, total power distribution unit, distribution electric unit, mobile change
Pressure unit and increase feed element be sequentially connected, increase feed element, level-one residual current protective unit, second level residual current protective unit,
Level Four residual current protective unit and end residual current protective unit are sequentially connected, three-level residual current protective unit and level Four residual current protective unit
Connection, signal acquisition unit is jumped in leapfrog, signal processing unit is jumped in leapfrog and jump regulation unit of bypassing the immediate leadership is sequentially connected, and signal is jumped in leapfrog
Acquisition unit and level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit, level Four residual current protective unit
It is connected with end residual current protective unit, bypasses the immediate leadership and jump regulation unit and level-one residual current protective unit, second level residual current protective unit, three-level
Residual current protective unit, level Four residual current protective unit are connected with end residual current protective unit.
2. leak(age) test, which is bypassed the immediate leadership, jumps malfunction System Utilization Procedure compatible with mobile substation, the steps include:
S1, determine mobile voltage transformation unit and increase at a distance from feed element and the output power of mobile voltage transformation unit feeder ear and
Power supply line's length；
S2, the low pressure sampling plate in mobile voltage transformation unit is increased to electrolytic capacitor, while by increased electrolytic capacitor and increases feedback
Electric unit is attached；
S3, signal acquisition unit real-time monitoring level-one residual current protective unit, second level residual current protective unit, three-level leakage are jumped using bypassing the immediate leadership
The residual voltage current information of electric protection unit and level Four residual current protective unit operation, and the information of monitoring is transmitted to more
Grade jumps signal processing unit, and the data that final leapfrog jump regulation unit is obtained according to processing are to level-one residual current protective unit, second level
Residual current protective unit, the time delay condition of three-level residual current protective unit and level Four residual current protective unit at work are set,
Mode is concurrently set to leak electricity according to level-one residual current protective unit to second level residual current protective unit, three-level residual current protective unit and level Four
Gradually successively decrease in the direction of protection location.
3. leak(age) test according to claim 1, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, which is characterized in that institute
It states total power distribution unit and rectification seamless regulation is carried out to the alternating current of input, distribution electric unit will be used for alternating current electricity consumption adjusted and carry out
It shunts, the electricity consumption after shunting is carried out transformation regulation by mobile voltage transformation unit according to actual needs, is increased feed element and is used for shifting
Dynamic voltage transformation unit carries out compatible allotment.
4. leak(age) test according to claim 1, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, which is characterized in that institute
Level-one residual current protective unit is stated for carrying out level-one leakage protection to the electricity consumption after transformation, second level residual current protective unit is used for change
Electricity consumption after pressure carries out second level leakage protection, and three-level residual current protective unit is used to carry out the electricity consumption after transformation three-level electric leakage anti-
Shield, level Four residual current protective unit be used for after transformation electricity consumption carry out level Four leakage protection, end residual current protective unit for pair
Electricity consumption after transformation carries out isolating and protecting, bypasses the immediate leadership and jumps signal acquisition unit for acquiring level-one residual current protective unit, second level electric leakage
The residual voltage current information of protection location, three-level residual current protective unit and level Four residual current protective unit operation is bypassed the immediate leadership and is jumped
Signal processing unit is used to carrying out the residual voltage current information of acquisition into processing conversion, bypasses the immediate leadership and jumps regulation unit for controlling one
Grade residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four residual current protective unit are at work
Time delay condition.
5. leak(age) test according to claim 1, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, which is characterized in that institute
Level-one residual current protective unit, second level residual current protective unit, three-level residual current protective unit and level Four residual current protective unit is stated to be all made of
Model BKD20-400 Protection for Mine Vacuum Feed Switch, end residual current protective unit use KBZ20-400 vacuum feed switch.
6. leak(age) test according to claim 1, which is bypassed the immediate leadership, jumps malfunction system compatible with mobile substation, which is characterized in that institute
Total power distribution unit is stated using PBG-400 mineral high-voltage vacuum distribution device for explosion-proof type permanent, distribution electric unit uses PBG-
200 mineral high-voltage vacuum distribution device for explosion-proof type permanent, mobile voltage transformation unit use the mobile substation of KBSGZY-166.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347453.4A CN110086149A (en) | 2019-04-28 | 2019-04-28 | Leak(age) test, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application |
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|---|---|---|---|
| CN201910347453.4A CN110086149A (en) | 2019-04-28 | 2019-04-28 | Leak(age) test, which is bypassed the immediate leadership, jumps malfunction compatible with mobile substation and application |
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| CN205377447U (en) * | 2015-12-03 | 2016-07-06 | 鞍钢集团矿业公司 | Mobile substation intelligence monitoring device |
| CN108983024A (en) * | 2018-07-14 | 2018-12-11 | 山东工商学院 | Mining earth leakage protective test and distant place closing device |
| CN208656407U (en) * | 2018-05-14 | 2019-03-26 | 国电龙源电气有限公司 | The protection system for preventing mediate contact from getting an electric shock |
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| CN201478797U (en) * | 2009-08-31 | 2010-05-19 | 莱芜市泰山阳光电器有限公司 | Mine low voltage electric network flame-proof type timing sequence identification concentrate select-leakage protection device |
| CN102005745A (en) * | 2010-12-07 | 2011-04-06 | 傅桂兴 | IT power distribution system of 380/220V low voltage network and leakage protector thereof |
| CN202940556U (en) * | 2012-09-04 | 2013-05-15 | 北京矿能科技有限公司 | Mining explosion-proof type low-voltage power grid multi-level electric leakage protector |
| CN204441767U (en) * | 2015-01-08 | 2015-07-01 | 西门子变压器（武汉）有限公司 | Mobile substation |
| CN205377447U (en) * | 2015-12-03 | 2016-07-06 | 鞍钢集团矿业公司 | Mobile substation intelligence monitoring device |
| CN208656407U (en) * | 2018-05-14 | 2019-03-26 | 国电龙源电气有限公司 | The protection system for preventing mediate contact from getting an electric shock |
| CN108983024A (en) * | 2018-07-14 | 2018-12-11 | 山东工商学院 | Mining earth leakage protective test and distant place closing device |
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