CN212258115U - Switch cabinet protection interlocking device - Google Patents
Switch cabinet protection interlocking device Download PDFInfo
- Publication number
- CN212258115U CN212258115U CN202021326355.7U CN202021326355U CN212258115U CN 212258115 U CN212258115 U CN 212258115U CN 202021326355 U CN202021326355 U CN 202021326355U CN 212258115 U CN212258115 U CN 212258115U
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- contact
- electromagnetic lock
- cubical switchboard
- photoelectric switch
- switch cabinet
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- 230000001012 protector Effects 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 description 18
- 238000012360 testing method Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a cubical switchboard protection interlock. Including installing the electromagnetic lock on the cubical switchboard, the electromagnetic lock includes first contact and the second contact of establishing ties each other, first contact electric connection is used for detecting the photoelectric switch who has or not the circuit breaker, second contact electric connection is to installing the overvoltage protection ware in the cubical switchboard. When the photoelectric switch does not detect the breaker, the first contact is normally closed; and when the overvoltage protector does not detect voltage, the second contact is normally closed. And a back cabinet of the switch cabinet cable bin is provided with a hand hole door for measuring insulation, and the electromagnetic lock is arranged on the hand hole door. The utility model discloses utilize series circuit as and the condition set up the interlocking, contain two kinds and can overhaul measured safety condition to reach promotion safety protection, reduction safety risk.
Description
Technical Field
The utility model belongs to the technical field of power equipment safety, especially, relate to a cubical switchboard protection interlock.
Background
A thermal power plant commonly uses single-loop power supply equipment such as a 6KV motor, all motors of a standby unit and standby motors of a normal operation unit have a long-time non-operation phenomenon, and motor insulation needs to be measured every 15 days according to operation regulations of the thermal power plant so as to ensure that motor equipment is in a reliable standby state. At present, two operation methods are generally adopted for measuring insulation of a motor of a thermal power plant, wherein firstly, an electricity testing trolley is used for testing electricity, the measurement insulation is carried out after no electricity is confirmed, secondly, a cable cabin of a switch cabinet is opened for testing electricity, and the measurement insulation is carried out after no electricity is confirmed.
However, the two electricity testing modes both involve the fact that an electricity testing trolley enters a switch cabin to conduct on-off grounding disconnecting link operation, and the problem of wrong interval exists. The on-site cubical switchboard of the same type of power plant generally only is equipped with one and tests the electric dolly, and tests the mechanical cooperation between electric dolly and the cubical switchboard and often have small difference, tests and easily causes the deformation of mechanism in the cabinet after the electric dolly passes in and out the cubical switchboard for a long time, causes the cubical switchboard trouble to increase, therefore this two kinds of modes all have great safety risk. If an operator manually specifies that a circuit breaker is not to be placed in the switch cabinet when measuring insulation, the circuit breaker is required to be measured in a non-electric state for safety requirements, and therefore a protection device is required to be arranged to improve safety guarantee for avoiding negligence.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cubical switchboard protects interlock utilizes series circuit to set up the electromagnetic lock that must satisfy the condition simultaneously could communicate, contains two kinds and can overhaul under the measuring safety condition as dual guarantee, can reach the effect that promotes the safety guarantee, reduces the safety risk.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the switch cabinet protection interlocking device comprises an electromagnetic lock, a first contact and a second contact which are arranged on a switch cabinet, wherein a circuit which is mutually connected in series is formed between the electromagnetic lock and the first contact as well as between the electromagnetic lock and the second contact; when the photoelectric switch does not detect the breaker, the first contact is normally closed; and when the overvoltage protector does not detect voltage, the second contact is normally closed.
Through setting up the electromagnetic lock, first contact and second contact are established ties each other, can establish to two conditions of interlocking with judgement voltage with satisfying or not having the circuit breaker simultaneously, when not having the circuit breaker in the cubical switchboard and not having the electricity, first contact and second contact are in the normally closed state, and the electromagnetic lock can be opened at any time and measure, and has the circuit breaker or have the electricity when having above-mentioned arbitrary situation to take place promptly, and first contact or second contact disconnection, the electromagnetic lock loses the electricity and can not open, then can't open the hand hole door. The level of protection safety can be improved, the safety guarantee is improved, and the safety risk is reduced.
The utility model discloses a further improvement is that the back cabinet in cubical switchboard cable chamber is seted up and is used for measuring insulating hand hole door, the electromagnetic lock is installed on the hand hole door.
The utility model discloses a further improvement scheme is, install insulating skin on the hand hole door.
The utility model discloses a further improvement is, photoelectric switch comprises transmitter and receiver, the transmitter with the receiver corresponds the setting both sides in the cubical switchboard.
The utility model discloses a further improvement is, the electromagnetic lock with the equal electric connection of photoelectric switch is to lighting power supply.
The utility model discloses a further improvement scheme is, overvoltage protector still electric connection to can follow the warning light that the outward appearance was observed, when overvoltage protector did not detect voltage, the warning light goes out; when the overvoltage protector detects voltage, the prompting lamp is turned on.
Compared with the prior art, the utility model, the beneficial effect who brings has:
(1) through setting up the electromagnetic lock, first contact and second contact are established ties each other, can establish to two conditions of interlocking with judgement voltage with satisfying or not having the circuit breaker simultaneously, when not having the circuit breaker in the cubical switchboard and not having the electricity, first contact and second contact are in the normally closed state, and the electromagnetic lock can be opened at any time and measure, and has the circuit breaker or have the electricity when having above-mentioned arbitrary situation to take place promptly, and first contact or second contact disconnection, the electromagnetic lock loses the electricity and can not open, then can't open the hand hole door. The level of protection safety can be improved, the safety guarantee is improved, and the safety risk is reduced.
(2) At the back cabinet installation hand hole door in cubical switchboard cable chamber, staff only need measure through the hand hole door when surveying insulating, reduce the operation of opening cubical switchboard cable chamber, stop the operation personnel and walk wrong interval, the risk of mistake closure earthing knife-switch.
(3) The optoelectronic switch uses a reflector and emitter separated by a transmissive type with a large detectable spacing.
(4) Can indicate overvoltage protector whether have electricity through setting up the warning light, when the electromagnetic lock can't be opened, can investigate fast and judge the reason by, reduce maintenance work load.
Drawings
FIG. 1 is a schematic diagram of a simple structure for installing the photoelectric switch of the present invention
FIG. 2 is the simple structure schematic diagram of the electromagnetic lock of the present invention
FIG. 3 is the schematic diagram of the interlocking process module of the present invention
In the figure: 1-a switch cabinet; 2-an electromagnetic lock; 3-a photoelectric switch; 4-a transmitter; 5-a receiver; 6-hand hole door.
Detailed Description
The present invention will be further clarified by the following detailed description, which is to be understood as being given by way of illustration only, and not by way of limitation, of the scope of the invention, which, after reading the present invention, is intended to fall within the scope of the appended claims, as modified by those skilled in the art in various equivalent forms.
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Example (b):
cubical switchboard protection interlock, including installing electromagnetic lock 2, first contact and the second contact on cubical switchboard 1, electromagnetic lock 2 with first contact with the second contact forms the circuit of establishing ties each other, first contact electric connection is to being used for detecting photoelectric switch 3 that has or not the circuit breaker, second contact electric connection is to installing the overvoltage protection ware in cubical switchboard 1.
Said first contact and said second contact are so-called contacts.
When the photoelectric switch 3 does not detect the breaker, the first contact is normally closed; and when the overvoltage protector does not detect voltage, the second contact is normally closed.
The electromagnetic lock 2 and the photoelectric switch 3 are both electrically connected to a lighting power supply with the model of AC 220V.
The photoelectric switch 3 can be of a diffuse reflection type or a convection type, in the embodiment, a convection type is used, the type of the photoelectric switch 3 is ohm dragon E3JK-TR12-D + E3JK-TR12, normally, two photoelectric switches 3 of the convection type are provided, and each photoelectric switch is composed of two separated transmitters 4 and two separated receivers 5, and the transmitters 4 and the receivers 5 are correspondingly arranged on two sides in the switch cabinet 1. In normal cubical switchboard, the circuit breaker usually has fixed operating position, therefore the both sides of photoelectric switch installation mainly are located the both sides of monitoring circuit breaker operating position, and the circuit breaker can not carry out insulating detection when being located operating position, does not have circuit breaker or circuit breaker when the operating position is not in the cubical switchboard 1, with 3 electric connection's of photoelectric switch first contact is the normally closed state, prescribes the circuit breaker must pull out outside the 1 cable compartment of cubical switchboard when surveying insulating, consequently when putting the circuit breaker in the cubical switchboard 1, interrupts transmitter 4 with light beam between the receiver 5 produces switching signal's change, first contact is disconnected by the normally closed state. The specific height position of the photoelectric switch 3 is adjusted according to the common placing positions of the switch cabinet 1 and the circuit breaker, and a plurality of groups of photoelectric switches 3 can also be installed.
When insulation is measured, the situation that no electricity passes through the switch cabinet 1 needs to be guaranteed, and an overvoltage protector is arranged in the switch cabinet 1 to transmit an electric signal. When the switch cabinet 1 is in a non-power state, the second contact which is connected with the overvoltage protector and is used for transmitting signals is in a normally closed state; when electricity exists in the switch cabinet 1, the overvoltage protector transmits signals to the second contact, and the second contact is disconnected.
Through setting up electromagnetic lock 2, first contact and the mutual series connection of second contact, can establish two conditions of interlocking with judging voltage with satisfying whether having the circuit breaker simultaneously, need survey when insulating operation promptly, must guarantee in the cubical switchboard 1 not have circuit breaker and electroless, whether photoelectric switch 3 accessible infrared detection exists the circuit breaker. When needing to survey insulating, as long as there is the circuit breaker or have electricity in any case, because first contact and second contact are established ties, electromagnetic lock 2 can't all be opened, brings dual guarantee and improves protection security level.
Example 2:
in order to reduce the operation that the electricity testing trolley enters the switch cabinet 1, the grounding disconnecting link is switched on and off, and the problem of wrong interval is avoided, so that the operation risk is further reduced. A hand hole door 6 for measuring insulation is arranged on a rear cabinet of a cable cabin of the switch cabinet 1, the electromagnetic lock 2 is installed on the hand hole door 6, and an insulation skin is installed on the hand hole door 6.
In order to further lock the unable reason of opening of electromagnetic lock 2 fast by, arrange in order to reduce maintenance work load fast, set up the warning light that is observable from outside, warning light electric connection to overvoltage protector, when electric the warning light lights, when electroless the warning light does not light, when electromagnetic lock 2 can't open, can be according to the source of warning light predetermined problem.
The rest is the same as embodiment 1, and is not described herein.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Cubical switchboard protection interlock, its characterized in that: the circuit comprises an electromagnetic lock (2), a first contact and a second contact which are arranged on a switch cabinet (1), wherein a circuit which is mutually connected in series is formed among the electromagnetic lock (2), the first contact and the second contact, the first contact is electrically connected to a photoelectric switch (3) for detecting whether a circuit breaker exists, and the second contact is electrically connected to an overvoltage protector arranged in the switch cabinet (1); when the photoelectric switch (3) does not detect the breaker, the first contact is normally closed; and when the overvoltage protector does not detect voltage, the second contact is normally closed.
2. The switchgear protection interlock as claimed in claim 1, wherein: and a hand hole door (6) for measuring insulation is arranged on a rear cabinet of the cable bin of the switch cabinet (1), and the electromagnetic lock (2) is installed on the hand hole door (6).
3. The switchgear protection interlock as claimed in claim 2, wherein: and an insulating skin is arranged on the hand hole door (6).
4. A switchgear protection interlock as claimed in any one of claims 1 to 3, characterized in that: the photoelectric switch (3) is composed of a transmitter (4) and a receiver (5), and the transmitter (4) and the receiver (5) are correspondingly arranged on two sides in the switch cabinet (1).
5. The switchgear protection interlock as claimed in claim 4, wherein: the electromagnetic lock (2) and the photoelectric switch (3) are both electrically connected to a lighting power supply.
6. The switchgear protection interlock as claimed in claim 5, wherein: the overvoltage protector is also electrically connected to a prompting lamp which can be observed from the outside, and the prompting lamp is turned off when the overvoltage protector does not detect voltage; when the overvoltage protector detects voltage, the prompting lamp is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021326355.7U CN212258115U (en) | 2020-07-08 | 2020-07-08 | Switch cabinet protection interlocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021326355.7U CN212258115U (en) | 2020-07-08 | 2020-07-08 | Switch cabinet protection interlocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212258115U true CN212258115U (en) | 2020-12-29 |
Family
ID=73980077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021326355.7U Withdrawn - After Issue CN212258115U (en) | 2020-07-08 | 2020-07-08 | Switch cabinet protection interlocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212258115U (en) |
-
2020
- 2020-07-08 CN CN202021326355.7U patent/CN212258115U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201229 Effective date of abandoning: 20231208 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201229 Effective date of abandoning: 20231208 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |