CN206283165U - A kind of transformer neutral point earthing resistance cabinet - Google Patents
A kind of transformer neutral point earthing resistance cabinet Download PDFInfo
- Publication number
- CN206283165U CN206283165U CN201621385473.9U CN201621385473U CN206283165U CN 206283165 U CN206283165 U CN 206283165U CN 201621385473 U CN201621385473 U CN 201621385473U CN 206283165 U CN206283165 U CN 206283165U
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- lock
- disconnecting switch
- point
- isolation
- operating mechanism
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Abstract
The utility model discloses a kind of transformer neutral point earthing resistance cabinet, it is related to technical field of transformer equipment, including isolation lock, door lock and isolator operating mechanism；Isolator operating mechanism is provided with open keyhole and obturator hernia, isolation lock is fixedly mounted on isolator operating mechanism sidepiece, the lock core of isolation lock enters in the open keyhole of isolator operating mechanism when isolation lock is closed, and the lock core of isolation lock exits the open keyhole of isolator operating mechanism when isolation lock is opened；The normally closed point QF of transformer power transmission breaker is connected in the coil DQS1 loops of isolation lock；Disconnecting switch is provided with opened point QS 1 and normally closed point QS 2, and the opened point QS 1 of disconnecting switch is connected in the closing coil QF HQ loops of transformer power transmission, and the normally closed point QS 2 of disconnecting switch is connected in the coil DQS2 loops of door lock；The utility model has the safety of enforceable protection operating personnel, the characteristics of prevent the potential safety hazard that operating personnel are brought due to operational error.
Description
Technical field
The utility model is related to technical field of transformer equipment, more particularly to a kind of transformer neutral point earth resistance
Cabinet.
Background technology
With the development of national economy, the situation that many urban power distribution networks are changed over based on overhead transmission line,
But based on cable run, at the same time, the closed SF6 switch cubicles of some novel devices, such as compact conformation, the poly- second of crosslinking
Alkene cable and Zinc-Oxide Arrester etc. are increasingly widely applied, and this allows for the non-effective earthing mode continued to use originally
Some are not applied to.As also in the case, using isolated neutral or through grounding through arc mode, there is single-phase earthing
Overvoltage very high can be produced during failure, various resonance overvoltages, its insulation can not voluntarily recover, not in time disengagement failure, held
Easily make failure propagation.Transformer neutral point ground resistance apparatus, by distribution network with neutral grounded through resistance, limit its failure electricity
Stream, makes relay protection device have time enough to be detected, realizes tripping operation and standby switching, it is to avoid power distribution network and electrical equipment
Destroyed.
Although the effect of transformer neutral point earthing resistance cabinet is fault current limiting, electricity is grounded in transformer neutral point
When resistance cabinet works there is very big potential safety hazard to human body in internal current, even fatal.Operating personnel are powered due to neglecting
Personal injury can be caused when disconnecting switch operation and opening resistor box.
Utility model content
The technical problems to be solved in the utility model is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of transformer is neutral
Point earthing resistance cabinet, solves the problems, such as that staff produces potential safety hazard because operational error carries out operation to powered resistor box,
With pressure type switch protection, the characteristics of safety coefficient is high.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of transformer neutral point ground connection
Resistor box, including isolation lock, door lock and isolator operating mechanism；The opening of door lock control resistance cabinet door and closing；Keep apart
Close operating mechanism and be provided with open keyhole and obturator hernia, isolation lock is fixedly mounted on the sidepiece of isolator operating mechanism, isolates locking
During conjunction the lock core of isolation lock enter isolator operating mechanism open keyhole in, isolation lock open when isolation lock lock core exit every
From the open keyhole of switch operating mechanism；The normally closed point QF of transformer power transmission breaker is connected on the coil DQS1 loops of isolation lock
In；Disconnecting switch is provided with opened point QS-1 and normally closed point QS-2, the opened point QS-1 closures when disconnecting switch is in "on" position,
Normally closed point QS-2 disconnects, and when disconnecting switch is in gate-dividing state, opened point QS-1 disconnects, normally closed point QS-2 closures, keeps apart
The opened point QS-1 of pass is connected in the closing coil QF-HQ loops of transformer power transmission, and the normally closed point QS-2 of disconnecting switch is connected on
In the coil DQS2 loops of door lock.
Preferably, the isolation lock and door lock are electromagnetic lock.
Preferably, the isolator operating mechanism is hand-power machinery operating mechanism, divides, closes disconnecting switch.
Preferably, the isolator operating mechanism is provided with two gears, respectively switch closing and switch opening position.
Preferably, the isolation lock is provided with two gears, respectively closes shelves and disconnects shelves.
Preferably, the isolator operating mechanism, isolation lock and door lock are arranged in resistor box cabinet door.
It is using the beneficial effect produced by above-mentioned technical proposal：The utility model is neutral by designing a kind of transformer
Point earthing resistance cabinet, is provided with electric power latch-up protection system on resistor box, and mandatory protection is carried out by following：
1st, because the normally closed point QF of transformer power transmission breaker is connected in the coil DQS1 loops of isolation lock, transformer is worked as
During in energization work, isolation lock coil DQS1 is in "on" position, and isolation lock closure, the lock core of isolation lock is located at disconnecting switch
In the lipostomous of operating mechanism, disconnecting switch cannot be opened, and when only transformer processes off-position, disconnecting switch could beat
Open, this part ensure that only transformer power-off could open the disconnecting switch of isolation resistance cabinet, prevent operating personnel powered
Resistor box disconnecting switch is operated a switch.
2nd, because the normally closed point QS-2 of disconnecting switch is connected in the coil DQS2 loops of door lock, only when disconnecting switch is in
Gate-dividing state, the normally closed point QS-2 of disconnecting switch is in closure state, and the coil DQS2 of door lock is powered, and door lock can be opened, no
Then resistor box is in "on" position, and door lock can not be opened, and this design ensure that only resistor box power-off could open resistor box, protect
Demonstrate,prove the safety of operating personnel.
3rd, the opened point QS-1 of disconnecting switch is connected in the closing coil QF-HQ loops of transformer power transmission, is only isolated
Switch is in "on" position, and disconnecting switch opened point QS-1 closures, transformer could close a floodgate power transmission, and this design can prevent operation
Personnel are powered to close a floodgate to resistor box disconnecting switch, it is ensured that the safety of operating personnel.
Design more than, the utility model can prevent operating personnel with the safety of enforceable protection operating personnel
Due to the potential safety hazard that operational error brings.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is transformer power transmission breaker and isolation lock circuit connection diagram.
Fig. 3 is disconnecting switch and door lock circuit connection figure.
Fig. 4 is the circuit connection diagram of disconnecting switch and transformer power transmission breaker.
In figure：1st, door lock；2nd, isolation lock；3rd, isolator operating mechanism.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, be a kind of structural representation of transformer neutral point earthing resistance cabinet of the utility model, including isolation
Lock 2, door lock 1 and isolator operating mechanism 3；The opening of the control resistance cabinet door of door lock 1 and closing；Isolator operating mechanism 3
Open keyhole and obturator hernia are provided with, isolation lock 2 is fixedly mounted on the sidepiece of isolator operating mechanism 3, isolates when isolation lock 2 is closed
The lock core of lock 2 enters in the open keyhole of isolator operating mechanism 3, and the lock core of isolation lock 2 is exited and kept apart when isolation lock 2 is opened
Close the open keyhole of operating mechanism 3；The normally closed point QF of transformer power transmission breaker is connected in the coil DQS1 loops of isolation lock 2；
Disconnecting switch is provided with opened point QS-1 and normally closed point QS-2, the opened point QS-1 closures when disconnecting switch is in "on" position, often
Close point QS-2 disconnects, and when disconnecting switch is in gate-dividing state, opened point QS-1 disconnects, normally closed point QS-2 closures, disconnecting switch
Opened point QS-1 be connected in the closing coil QF-HQ loops of transformer power transmission, the normally closed point QS-2 of disconnecting switch is connected on door
In the coil DQS2 loops of lock 1.
As shown in Fig. 2 be transformer power transmission breaker and the circuit connection diagram of isolation lock 2, due to transformer power transmission breaker
Normally closed point QF be connected in the coil DQS1 loops of isolation lock 2, when transformer be in energization work when, the normally closed point of breaker
QF is disconnected, and the coil DQS1 of isolation lock 2 is in off-position, and isolation lock 2 is closed, and the lock core of isolation lock 2 is located at isolator operation
In the lipostomous of mechanism 3, disconnecting switch cannot be opened, and when only transformer is in off-position, isolator operating mechanism 3 is
Can act and open disconnecting switch, this is designed to the isolator operation machine for ensureing there was only transformer power-off ability actuating resistor box
Structure 3, opens disconnecting switch, prevents operating personnel powered and resistor box disconnecting switch is operated a switch.
As shown in figure 3, be disconnecting switch and the circuit connection diagram of door lock 1, because the normally closed point QS-2 of disconnecting switch is connected on door
In the coil DQS2 loops of lock 1, only when disconnecting switch is in gate-dividing state, the normally closed point QS-2 of disconnecting switch is in closed form
State, the coil DQS2 of door lock 1 is powered, and door lock 1 can be opened, and otherwise resistor box is in "on" position, and door lock 1 can not be opened, this
Plant design and ensure that only resistor box power-off could open resistor box, it is ensured that the safety of operating personnel.
As shown in figure 4, being disconnecting switch and the circuit connection diagram of transformer power transmission breaker, the opened point of disconnecting switch
QS-1 is connected in the closing coil QF-HQ loops of transformer power transmission, and only disconnecting switch is in "on" position, and disconnecting switch is normal
QS-1 closures are prescribed, transformer could close a floodgate power transmission, and this design can prevent the powered actuating resistor box disconnecting switch of operating personnel
Operating mechanism 3 is closed a floodgate, it is ensured that the safety of operating personnel.
The isolation lock 2 and door lock 1 used in the design are electromagnetic lock, electromagnetic lock by electromagnetic principle can with according to whether
Be powered voluntarily switch motion, it is ensured that the mandatory protection of the design.
The isolator operating mechanism 3 used in the design be hand-power machinery operating mechanism, actuating disconnecting switch point, close
Lock, two gears are respectively closing position and open position.
The isolator operating mechanism 3, isolation lock 2 and door lock 1 are arranged in resistor box cabinet door.
After adopting the above technical scheme, the utility model can prevent operation with the safety of enforceable protection operating personnel
The potential safety hazard that personnel are brought due to operational error.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of transformer neutral point earthing resistance cabinet, it is characterised in that：Including isolation lock（2）, door lock（1）Grasped with disconnecting switch
Make mechanism（3）；Door lock（1）Control the opening of resistance cabinet door and close；Isolator operating mechanism（3）It is provided with open keyhole and locking
Hole, isolation lock（2）It is fixedly mounted on isolator operating mechanism（3）Sidepiece, isolation lock（2）Isolation lock during closure（2）Lock core
Into isolator operating mechanism（3）Open keyhole in, isolation lock（2）Isolation lock during opening（2）Lock core exit disconnecting switch
Operating mechanism（3）Open keyhole；The normally closed point QF of transformer power transmission breaker is connected on isolation lock（2）Coil DQS1 loops
In；Disconnecting switch is provided with opened point QS-1 and normally closed point QS-2, the opened point QS-1 closures when disconnecting switch is in "on" position,
Normally closed point QS-2 disconnects, and when disconnecting switch is in gate-dividing state, opened point QS-1 disconnects, normally closed point QS-2 closures, keeps apart
The opened point QS-1 of pass is connected in the closing coil QF-HQ loops of transformer power transmission, and the normally closed point QS-2 of disconnecting switch is connected on
Door lock（1）Coil DQS2 loops in.
2. a kind of transformer neutral point earthing resistance cabinet according to claim 1, it is characterised in that：The isolation lock（2）
And door lock（1）It is electromagnetic lock.
3. a kind of transformer neutral point earthing resistance cabinet according to claim 1, it is characterised in that：The disconnecting switch behaviour
Make mechanism（3）Be a kind of hand-power machinery operating mechanism, actuating disconnecting switch point, close a floodgate.
4. a kind of transformer neutral point earthing resistance cabinet according to claim 1, it is characterised in that：The disconnecting switch behaviour
Make mechanism（3）It is provided with two gears, respectively the switch closing and switch opening position of disconnecting switch.
5. a kind of transformer neutral point earthing resistance cabinet according to claim 1, it is characterised in that：The isolation lock（2）
Two gears are provided with, shelves are respectively closed and is disconnected shelves.
6. a kind of transformer neutral point earthing resistance cabinet according to claim 1, it is characterised in that：The disconnecting switch behaviour
Make mechanism（3）, isolation lock（2）And door lock（1）In resistor box cabinet door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385473.9U CN206283165U (en) | 2016-12-16 | 2016-12-16 | A kind of transformer neutral point earthing resistance cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385473.9U CN206283165U (en) | 2016-12-16 | 2016-12-16 | A kind of transformer neutral point earthing resistance cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206283165U true CN206283165U (en) | 2017-06-27 |
Family
ID=59072540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621385473.9U Active CN206283165U (en) | 2016-12-16 | 2016-12-16 | A kind of transformer neutral point earthing resistance cabinet |
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| Country | Link |
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| CN (1) | CN206283165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109192569A (en) * | 2018-10-31 | 2019-01-11 | 常州赛尔克瑞特电气有限公司 | A kind of control method being latched between three station grounding switch and breaker open operation |
-
2016
- 2016-12-16 CN CN201621385473.9U patent/CN206283165U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109192569A (en) * | 2018-10-31 | 2019-01-11 | 常州赛尔克瑞特电气有限公司 | A kind of control method being latched between three station grounding switch and breaker open operation |
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