CN218182080U - Interlocking control protection device for bus coupler cabinet and isolation cabinet of metal mine underground substation - Google Patents
Interlocking control protection device for bus coupler cabinet and isolation cabinet of metal mine underground substation Download PDFInfo
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- CN218182080U CN218182080U CN202221881127.5U CN202221881127U CN218182080U CN 218182080 U CN218182080 U CN 218182080U CN 202221881127 U CN202221881127 U CN 202221881127U CN 218182080 U CN218182080 U CN 218182080U
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- breaker
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Abstract
The utility model discloses a metal mine underground substation bus-bar and isolation cabinet interlocking control protection device, which comprises an interlocking control loop, wherein the interlocking control loop comprises a breaker closing relay, an isolation switch tripping relay and an isolation switch closing relay, and a first power supply end is connected with a second power supply end sequentially through a coil of the breaker closing relay, a first travel switch and a normally open contact of the isolation switch closing relay; the first power end is connected with the second power end sequentially through a coil of the disconnecting switch tripping relay, the fourth travel switch and a normally closed contact of the breaker closing relay. The utility model discloses an interlocking control has realized that female cabinet and the isolation cabinet of alliing oneself with earlier closing isolator when closing a floodgate closes the circuit breaker again, divides the requirement of circuit breaker subdivision isolator earlier when the separating brake.
Description
Technical Field
The utility model relates to an electric power protection technical field, concretely relates to female cabinet and the isolation cabinet interlocking control protection device that allies oneself with of metal mine underground substation.
Background
At present, a metal mine underground central substation or a large mining area needs to supply power by a double-loop power supply, and two paths of power supplies are connected between double-loop high-voltage incoming line cabinets and isolation cabinets through a bus connection cabinet. If two underground power supplies supply power simultaneously, once one side of the two underground power supplies fails, the influence range is enlarged, and the risk of faults such as circulation, short circuit and the like caused by two phase sequence errors exists, so that the two underground power supplies cannot supply power simultaneously, and the load communication of the two sides is realized through a bus coupler cabinet and an isolation cabinet under the common condition.
When the main connection cabinet and the isolation cabinet are in contact operation, the isolation switch is required to be closed firstly and then the circuit breaker is required to be closed firstly when switching-on is carried out, the circuit breaker is required to be broken firstly and then the isolation switch is required to be separated when switching-off is carried out, and the possibility of reverse switching-on sequence exists in the existing control mode because no effective prevention and control measures exist, such as misoperation of an operator, and the isolation switch is extremely easy to burn or even cause explosion.
SUMMERY OF THE UTILITY MODEL
The utility model provides a female cabinet and isolation cabinet interlocking control protection device that allies oneself with of metal mine transformer substation in pit, its purpose: accidents such as burning and even explosion of the isolating switch caused by misoperation of an operator when loads on two sides in the underground substation are communicated are avoided.
The utility model discloses technical scheme as follows:
the interlocking control protection device comprises a breaker arranged on a female combined cabinet, a disconnecting switch arranged on the disconnecting cabinet and an interlocking control loop, wherein the interlocking control loop comprises a breaker closing relay MHJ, a disconnecting switch tripping relay GTJ and a disconnecting switch closing relay GHJ, a first connecting end of a coil part of the breaker closing relay MHJ is connected with a first power end-KM, and a second connecting end of the coil part of the breaker closing relay MHJ is connected with a second power end + KM sequentially through a first travel switch DL-1 and a normally open contact GHJ-1 of the disconnecting switch closing relay.
And a second connecting end of the coil part of the disconnecting switch tripping relay GTJ is connected with a second power supply end + KM through a fourth travel switch DL-4 and a normally closed contact MHJ-1 of a breaker closing relay in sequence.
The first power supply end-KM is also connected with a second power supply end + KM through a coil part of the isolating switch closing relay GHJ and a third stroke switch DL-3 in sequence.
Furthermore, the interlocking control loop further comprises a breaker closing protection relay MHBJ, a disconnecting switch tripping protection relay GTBJ and a disconnecting switch closing protection relay GHBJ, wherein a coil part of the breaker closing protection relay MHBJ is connected in series with a normally open contact MHBJ-1 of the breaker closing protection relay and then is connected between the normally open contact GHJ-1 of the disconnecting switch closing relay and a second power end + KM.
And a coil part of the disconnecting switch tripping protection relay GTBJ is connected in series with a normally open contact GTBJ-1 of the disconnecting switch tripping protection relay and then is connected between a normally closed contact MHJ-1 of the breaker closing relay and a second power supply end + KM.
And a coil part of the disconnecting switch closing protection relay GHBJ is connected in series with a normally open contact GHBJ-1 of the disconnecting switch closing protection relay and then is connected between the third stroke switch DL-3 and a second power end + KM.
Further, the interlock control circuit is arranged in the relay instrument room.
Furthermore, an automatic energy storage motor and a manual energy storage device are arranged inside the circuit breaker, and a protective partition plate is arranged between the upper and lower moving and fixed contacts of the circuit breaker.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) An interlocking control loop is arranged between the bus coupler cabinet and the isolation cabinet, and the interlocking control of a control relay realizes the requirements that the bus coupler cabinet and the isolation cabinet firstly close an isolating switch and then close a circuit breaker when switching on and then break the circuit breaker and then the isolating switch when switching off, thereby effectively avoiding the accidents of burning and even explosion of the isolating switch caused by misoperation due to the fact that the switching-on sequence of operators is opposite;
(2) The switching-on/switching-off protective relays are arranged on the switching-on/switching-off loops of the circuit breaker and the isolating switch, so that misoperation under abnormal conditions of overvoltage, undervoltage and the like is prevented, and the reliability and the power utilization safety are improved;
(3) The automatic energy storage motor inside the circuit breaker can automatically store energy when the circuit breaker is switched on, the labor intensity of a power distributor is reduced, the circuit breaker can still normally switch on when the manual energy storage device guarantees that the automatic energy storage motor breaks down, a partition plate is arranged between the upper static contact and the lower static contact for protection, accidents such as electric shock by mistake and the like can be effectively prevented when the circuit breaker is maintained in an electrified mode, and therefore reliability and power utilization safety of the circuit breaker are improved.
Drawings
FIG. 1 is a schematic diagram of an interlock control loop;
fig. 2 is a schematic diagram of the communication between the bus coupler cabinet and the isolation cabinet.
Detailed Description
The technical scheme of the utility model is explained in detail in the following with the attached drawings:
as shown in fig. 1, the interlocking control protection device for the metal mine underground substation primary connection cabinet and the isolation cabinet comprises a breaker 2 installed in the primary connection cabinet, an isolation switch 8 installed in the isolation cabinet, and an interlocking control loop, wherein the interlocking control loop comprises a breaker closing relay MHJ, a breaker tripping relay MTJ, an isolation switch tripping relay GTJ and an isolation switch closing relay GHJ, a first connection end of a coil part of the breaker closing relay MHJ is connected with a first power end-KM, a second connection end of the coil part of the breaker closing relay MHJ is connected with a second power end + KM sequentially through a first travel switch DL-1 and a normally open contact GHJ-1 of the isolation switch closing relay, and the coil part of the breaker closing relay MHJ and the first travel switch DL-1 form a breaker closing operation mechanism.
The first power end-KM is connected with a second power end + KM sequentially through a coil part of the breaker tripping relay MTJ and a second travel switch DL-2, and the coil part of the breaker tripping relay MTJ and the second travel switch DL-2 form a breaker tripping operation mechanism.
The first connecting end of the coil part of the disconnecting switch tripping relay GTJ is connected with a first power end-KM, the second connecting end of the coil part of the disconnecting switch tripping relay GTJ is connected with a second power end + KM through a fourth travel switch DL-4 and a normally closed contact MHJ-1 of a breaker closing relay in sequence, and the coil part of the disconnecting switch tripping relay GTJ and the fourth travel switch DL-4 form a disconnecting switch tripping operation mechanism.
The first power end-KM is connected with the second power end + KM sequentially through a coil part of the disconnecting switch closing relay GHJ and the third stroke switch DL-3, and the coil part of the disconnecting switch closing relay GHJ and the third stroke switch DL-3 form a disconnecting switch closing operation mechanism.
Preferably, the interlock control loop further includes a breaker closing protection relay MHBJ, a breaker tripping protection relay MTBJ, a disconnector tripping protection relay GTBJ and a disconnector closing protection relay GHBJ, and a coil part of the breaker closing protection relay MHBJ is connected in series with a normally open contact MHBJ-1 of the breaker closing protection relay and then connected between the normally open contact GHJ-1 of the disconnector closing relay and a second power supply terminal + KM.
And the coil part of the breaker tripping protection relay MTBJ is connected in series with the normally open contact MTBJ-1 of the breaker tripping protection relay and then connected between the second travel switch DL-2 and a second power supply end + KM.
And a coil part of the disconnecting switch tripping protection relay GTBJ is connected in series with a normally open contact GTBJ-1 of the disconnecting switch tripping protection relay and then is connected between a normally closed contact MHJ-1 of the breaker closing relay and a second power supply end + KM.
And a coil part of the disconnecting switch closing protection relay GHBJ is connected in series with a normally open contact GHBJ-1 of the disconnecting switch closing protection relay and then is connected between the third stroke switch DL-3 and a second power end + KM.
The working principle of the interlocking control loop is as follows: when closing a switch, the isolating switch closes a switch loop: manually turning on the isolating switch 8, enabling a coil of a closing protection relay GHBJ of the isolating switch to be electrified, closing a normally open contact GHBJ-1, manually shaking the isolating switch 8 to a position, then closing a third stroke switch DL-3, enabling a coil of a closing relay GHJ of the isolating switch to be electrified, and enabling the isolating switch to realize closing operation; a circuit breaker closing loop: manually switching on the breaker 2, enabling a coil of a breaker switching-on protection relay MHBJ to be electrified, enabling a normally open contact MHBJ-1 to be closed, manually shaking the breaker 2 to a position, enabling a first travel switch DL-1 to be closed, enabling a coil of the breaker switching-on relay MHJ to be electrified, enabling the normally open contact GHJ-1 of the breaker switching-on relay to be in an open state if the isolating switch 8 is not switched on, locking a breaker switching-on operating mechanism, and not switching on the breaker 2; when the isolating switch 8 of the isolating cabinet is in place, the coil of the isolating switch closing relay GHJ is electrified, the normally open contact GHJ-1 of the isolating switch closing relay is closed, and the circuit breaker 2 can realize the closing operation. Therefore, the requirement that the disconnecting switch is firstly switched on and then the circuit breaker is switched on is met.
When opening, the circuit breaker trip circuit: manually disconnecting the breaker 2, enabling a coil of the breaker tripping protection relay MTBJ to be electrified, closing the normally open contact MTBJ-1, manually swinging the breaker 2 to a position, closing the second travel switch DL-2, enabling the coil of the breaker tripping relay MTJ to be electrified, and realizing tripping operation by the breaker; trip circuit of the disconnecting switch: manually disconnecting the isolating switch 8, enabling a coil of the isolating switch tripping protection relay GTBJ to be electrified, closing the normally open contact GTBJ-1, manually shaking the isolating switch 8 to a position, closing the fourth travel switch DL-4, enabling the coil of the isolating switch tripping relay GTJ to be electrified, and enabling the isolating switch 8 to execute tripping operation if the circuit breaker 2 is in a tripping state and the normally closed contact MHJ-1 of the circuit breaker closing relay is in a closing state; if the circuit breaker 2 is in a closing state, a coil of a circuit breaker closing relay MHJ is electrified, a normally closed contact MHJ-1 of the circuit breaker closing relay is disconnected, the disconnecting switch tripping operation mechanism is locked, and the disconnecting switch 8 cannot execute tripping operation. Therefore, the requirement that the circuit breaker is firstly disconnected and then the isolating switch is disconnected is met.
The interlocking control loop is arranged in the relay instrument room.
Further, inside automatic energy storage motor and the manual energy memory of being equipped with of circuit breaker 2, be equipped with the protection baffle between the upper and lower sound contact of circuit breaker 2. The automatic energy storage motor inside the circuit breaker can automatically store energy when switching on, labor intensity of a power distributor is reduced, the circuit breaker can still normally switch on when the manual energy storage device guarantees that the automatic energy storage motor fails, a partition plate is arranged between an upper static contact and a lower static contact for protection, and accidents such as electric shock by mistake can be effectively prevented when live-line maintenance is carried out.
As shown in fig. 2, a first connection end of the circuit breaker 2 is connected with a first bus bar 1, a second connection end of the circuit breaker 2 is connected with a second connection end of an isolation switch 8 through a communication bus bar 7, and the first connection end of the isolation switch 8 is connected with a second bus bar 3; the circuit breaker 2 is installed in the handcart room of the mother gang cabinet, the first busbar 1 penetrates through a through hole between corresponding cabinet bodies to be installed in the bus room of the mother gang cabinet, the through hole is isolated, the type of the first busbar 1 is TMY-3 (80 x 10), the joint of the main busbar and the branch busbar is embossed, the end corner is provided with a guide corner, and an insulating shrinkage pipe is penetrated and sleeved to prevent accidents such as overheating and electric shock caused by poor contact. The isolating switch 8 is arranged in a handcart room of the isolating cabinet and used for breaking the upper busbar and the lower busbar; the second busbar 3 is arranged in a busbar chamber of the isolation cabinet, the contact busbar 7 is arranged in a cable chamber of the busbar cabinet, and the contact busbar 7 is used for connecting the busbar cabinet and the isolation cabinet.
The second connecting end of the breaker 2 is connected with the grounding end through a resonance elimination device 5, the resonance elimination device 5 is a high-capacity nonlinear resistor, plays roles in damping and current limiting, and further improves the electricity utilization safety, and the resonance elimination device 5 is installed in a cable chamber of the female header.
The second connecting end of the circuit breaker 2 is also connected with a current transformer 4, the current transformer 4 converts large current into small current through a certain transformation ratio for measurement, protection and other purposes, and the current transformer 4 is installed in a cable chamber of the bus coupler cabinet.
The second link of circuit breaker 2 is connected with the earthing terminal through power indicator 6, and power indicator 6 is used for instructing female arranging whether to switch on, reminds power distribution worker etc. to pay attention to safety, power indicator 6 installs in the relay instrument room.
The positions of all parts in the bus coupler cabinet and the isolation cabinet are reasonably arranged, and the on-site installation and maintenance are facilitated.
Claims (4)
1. The utility model provides a metal mine is female allies oneself with cabinet and isolation cabinet interlocking control protection device in transformer substation in pit, including installing in female circuit breaker (2) of alliing oneself with the cabinet and installing in isolator (8) of isolation cabinet, its characterized in that: the interlocking control circuit comprises a breaker closing relay MHJ, an isolating switch tripping relay GTJ and an isolating switch closing relay GHJ, wherein a first connecting end of a coil part of the breaker closing relay MHJ is connected with a first power supply end-KM, and a second connecting end of the coil part of the breaker closing relay MHJ is connected with a second power supply end + KM sequentially through a first travel switch DL-1 and a normally open contact GHJ-1 of the isolating switch closing relay;
a first connecting end of a coil part of the disconnecting switch tripping relay GTJ is connected with a first power end-KM, and a second connecting end of the coil part of the disconnecting switch tripping relay GTJ is connected with a second power end + KM through a fourth travel switch DL-4 and a normally closed contact MHJ-1 of a breaker closing relay in sequence;
the first power supply end-KM is also connected with a second power supply end + KM through a coil part of the isolating switch closing relay GHJ and a third stroke switch DL-3 in sequence.
2. The metal mine underground substation bus connection cabinet and isolation cabinet interlocking control protection device according to claim 1, characterized in that: the interlocking control loop further comprises a breaker closing protection relay MHBJ, a disconnecting switch tripping protection relay GTBJ and a disconnecting switch closing protection relay GHBJ, wherein a coil part of the breaker closing protection relay MHBJ is connected in series with a normally open contact MHBJ-1 of the breaker closing protection relay and then is connected between the normally open contact GHJ-1 of the disconnecting switch closing relay and a second power supply end + KM;
a coil part of the disconnecting switch tripping protection relay GTBJ is connected in series with a normally open contact GTBJ-1 of the disconnecting switch tripping protection relay and then is connected between a normally closed contact MHJ-1 of the breaker closing relay and a second power supply end + KM;
and a coil part of the isolating switch closing protection relay GHBJ is connected in series with a normally open contact GHBJ-1 of the isolating switch closing protection relay and then is connected between the third stroke switch DL-3 and a second power supply end + KM.
3. The metal mine underground substation bus-bar cabinet and isolation cabinet interlocking control protection device according to claim 1, characterized in that: the interlocking control loop is arranged in the relay instrument room.
4. The metal mine underground substation busbar cabinet and isolation cabinet interlocking control protection device as claimed in any one of claims 1 to 3, wherein: the circuit breaker (2) is internally provided with an automatic energy storage motor and a manual energy storage device, and a protective partition plate is arranged between an upper moving contact and a lower moving contact of the circuit breaker (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221881127.5U CN218182080U (en) | 2022-07-21 | 2022-07-21 | Interlocking control protection device for bus coupler cabinet and isolation cabinet of metal mine underground substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221881127.5U CN218182080U (en) | 2022-07-21 | 2022-07-21 | Interlocking control protection device for bus coupler cabinet and isolation cabinet of metal mine underground substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218182080U true CN218182080U (en) | 2022-12-30 |
Family
ID=84614887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221881127.5U Active CN218182080U (en) | 2022-07-21 | 2022-07-21 | Interlocking control protection device for bus coupler cabinet and isolation cabinet of metal mine underground substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218182080U (en) |
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2022
- 2022-07-21 CN CN202221881127.5U patent/CN218182080U/en active Active
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