CN106655898B - Reactor cabinet control circuit - Google Patents
Reactor cabinet control circuit Download PDFInfo
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- CN106655898B CN106655898B CN201710146546.1A CN201710146546A CN106655898B CN 106655898 B CN106655898 B CN 106655898B CN 201710146546 A CN201710146546 A CN 201710146546A CN 106655898 B CN106655898 B CN 106655898B
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- vacuum contactor
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- relay
- open contact
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
Abstract
A reactor cabinet control circuit comprises a breaker QF, an intermediate relay KA, a relay 1ZJ, a vacuum contactor KM and a power supply; the circuit comprises a delay starting circuit, a closing circuit and a vacuum contactor control circuit, wherein the delay starting circuit, the closing circuit and the vacuum contactor control circuit are connected in parallel and are connected to two ends of a power supply; the delay starting circuit is formed by serially connecting coils of a breaker QF and an intermediate relay KA; the switching-on loop is formed by connecting a normally open contact of the intermediate relay KA with a coil of the relay 1ZJ in series; the control loop of the vacuum contactor is that a normally open contact of the relay 1ZJ is connected with a coil of the vacuum contactor KM; the reactor cabinet is connected in parallel at two ends of the power supply. The circuit has the advantages that: the reactor cabinet is protected by the vacuum contactor control loop, and when the vacuum contactor control loop has a problem, the PLC alarm can be started.
Description
Technical Field
The invention relates to the field of reactor cabinets, in particular to a control circuit of a reactor cabinet.
Background
The pump is used as key equipment of a coal mine factory building, provides main feeding for a coal mine system, and can directly influence normal production of the system once a fault occurs. The combination pump comprises a feeder cabinet and a reactor cabinet, and in the use process, the reactor needs to be shorted to prevent the reactor from being overheated due to long-time electrification, so a control circuit is needed to protect the reactor.
Disclosure of Invention
The invention aims to solve the technical problem that a reactor cabinet is electrified for a long time to be overheated and damaged, so that the control circuit of the reactor cabinet is provided.
The reactor cabinet control circuit is characterized by comprising a breaker QF, an intermediate relay KA, a relay 1ZJ, a vacuum contactor KM and a power supply; the circuit comprises a delay starting circuit, a closing circuit and a vacuum contactor control circuit, wherein the delay starting circuit, the closing circuit and the vacuum contactor control circuit are connected in parallel and are connected to two ends of a power supply;
the delay starting circuit is formed by serially connecting coils of a breaker QF and an intermediate relay KA;
the switching-on loop is formed by connecting a normally open contact of the intermediate relay KA with a coil of the relay 1ZJ in series;
the vacuum contactor control loop is that a normally open contact of the relay 1ZJ is connected with a coil of the vacuum contactor KM;
the reactor cabinets are connected in parallel at two ends of the power supply.
Still include first time relay KT1, the coil of first time relay KT1 connects in parallel at the both ends of the coil of intermediate relay KA, the normally open contact setting of first time relay KT1 is on the closing circuit, and establishes ties with the normally open contact of intermediate relay KA.
The automatic gear shifting device further comprises a stop button SB, a shifting knob SB1 and a start button SB2, wherein the shifting knob comprises an automatic gear switch and a manual gear switch;
the stop button SB is connected with two ends of the automatic gear switch in series and then connected on the switching-on loop in series;
the manual gear switch is connected with the starting button SB2 in series, and the series circuit is connected in parallel with the two ends of the circuit after the normally open contact of the first time relay KT1 and the automatic gear switch are connected to form a control locking loop.
The two ends of the serial circuit of the manual gear switch and the starting button SB2 are also connected with normally open contacts of the relay 1ZJ in parallel to form a self-holding loop.
The starting timing overrun loop comprises a first normally-closed contact of a vacuum contactor KM, a normally-open contact of an intermediate relay KA and a second time relay KT2; the starting timing overrun loop is connected in parallel with two ends of the power supply; the first normally-closed contact of the vacuum contactor KM and the normally-open contact of the intermediate relay KA are sequentially connected in series, and the second time relay KT2 is connected in series.
The vacuum contactor is characterized by further comprising a second normally-closed contact of the vacuum contactor KM, wherein the second normally-closed contact of the vacuum contactor KM is connected in parallel with two ends of the first normally-closed contact of the vacuum contactor KM.
The power supply comprises a short circuit display loop which is connected in parallel with two ends of a power supply; the short circuit display loop comprises a normally open contact and a short circuit display lamp of the vacuum contactor KM, and the normally open contact and the short circuit display lamp of the vacuum contactor KM are connected in series.
Still include second time relay KT 2's second normally open contact and PLC, second time relay KT 2's second normally open contact one end is connected with PLC, and the other end is connected with the power.
The electric power generator further comprises a start indicator lamp which is connected in parallel with two ends of the coil of the second time relay KT2.
The positive and negative output ends of the power supply are connected in series with an air switch 2ZK.
The invention has the advantages that:
(1) According to the invention, the breaker QF is sucked, high-voltage electricity reaches an upper port of a reactor cabinet through a cable, at the moment, because a vacuum contactor KM in the reactor cabinet is not sucked, the high-voltage electricity is applied to the reactor, when the breaker QF is closed in a delay starting circuit, a delay circuit is started, an intermediate relay KA and a time relay KT1 are sucked, contacts of the time relay KT1 and the intermediate relay KA in a corresponding reactor cabinet closing circuit are closed, if a control stop button SB is closed and a switching knob SB1 is closed at an automatic gear switch, the closing circuit condition of the reactor cabinet is met, the relay 1ZJ is sucked, a normally open contact of the relay 1ZJ is closed, namely, a vacuum contactor control circuit is conducted, namely, a vacuum contactor KM coil in the circuit is sucked, after the vacuum contactor KM is sucked, the vacuum contactor and the reactor are connected in parallel, the resistance of the vacuum contactor is far smaller than that of the reactor, and current is led from a short circuit branch circuit of the low-resistance in the parallel circuit, so that the motor of the reactor is closed, the motor is started, and the motor is safely started.
(2) In the normal use process, an auxiliary contact of a vacuum contactor KM in a reactance cabinet is clamped due to deformation of overheat plastic, a normally-open contact of the vacuum contactor KM and a first normally-closed contact of the vacuum contactor KM are a pair of contacts, the normally-open contact of the vacuum contactor KM is changed into a normally-closed state, the first normally-closed contact of the vacuum contactor KM is changed into a normally-open state, when the high-voltage circuit breaker QF of the feeder cabinet is started again, the vacuum contactor KM is clamped by the auxiliary contact, a contactor power mechanism cannot normally act, a reactor cannot be shorted, and the reactor cabinet is protected from 'over-limit starting timing' because the first normally-closed point of the vacuum contactor KM is not in a normal closed state, a protection condition is not met, and a second time relay KT2 cannot be started normally. In a feeder cabinet, a first normally open contact of a second time relay KT2 controls on-off of a breaker QF, when the first normally open contact of the second time relay KT2 is electrically closed, the breaker QF is attracted, otherwise, the breaker QF is opened, so that a coil of a vacuum contactor KM cannot be electrified, a protection function cannot be realized, and a reactor cabinet 'short circuit indication loop' is closed due to a normally open contact of the vacuum contactor KM, so that a false signal of loop 'short circuit' is caused.
(3) According to the invention, a time relay KT2 contact with overtime short circuit is started, a signal of the time relay KT2 contact is returned to a dispatching industrial personal computer, an alarm display is made on the dispatching industrial personal computer by writing a corresponding program, if in a starting state, when the overtime short circuit is detected, a 'short circuit overtime alarm' is displayed on a dispatching picture, after the alarm is found, a dispatcher can timely inform an electrician to check before the electrician, timely stop the high-voltage feeder cabinet, stop equipment, search for and solve corresponding faults, and the possibility of long-term overheat burnout of a reactor is reduced.
(4) The short circuit indicator lamp is arranged in the invention, so that whether the short circuit is successful can be checked more intuitively.
Drawings
Fig. 1 is a schematic diagram of a control circuit of a reactor tank of the present invention.
Detailed Description
As shown in fig. 1, the reactor cabinet control circuit comprises a breaker QF, an intermediate relay KA, a relay 1ZJ, a vacuum contactor KM, a power supply, a first time relay KT1, a second normally-closed contact of the vacuum contactor KM, a second normally-open contact of a second time relay KT2 and a PLC. Stop button SB, shift knob SB1, start button SB2, shift knob includes automatic gear switch and manual gear switch.
The circuit comprises a delay starting circuit, a closing circuit and a vacuum contactor control circuit, wherein the delay starting circuit, the closing circuit and the vacuum contactor control circuit are connected in parallel and are connected to two ends of a power supply.
The starting timing overrun loop comprises a first normally closed contact of the vacuum contactor KM, a normally open contact of the intermediate relay KA and a second time relay KT2, and the starting timing overrun loop is connected in parallel with two ends of a power supply.
The power supply comprises a short circuit display loop which is connected in parallel with two ends of a power supply; the short circuit display loop comprises a normally open contact and a short circuit display lamp of the vacuum contactor KM.
The delay starting circuit is formed by serially connecting coils of a breaker QF and an intermediate relay KA.
The switching-on loop is formed by connecting a normally open contact of the intermediate relay KA with a coil of the relay 1ZJ in series.
The vacuum contactor control loop is that a normally open contact of the relay 1ZJ is connected with a coil of the vacuum contactor KM.
The reactor cabinets are connected in parallel at two ends of the power supply.
The coil of first time relay KT1 connects in parallel at the both ends of the coil of intermediate relay KA, the normally open contact of first time relay KT1 sets up on the closing circuit, and establishes ties with the normally open contact of intermediate relay KA.
The stop button SB is connected with two ends of the automatic gear switch in series and then connected on the switching-on loop in series;
the manual gear switch is connected with the starting button SB2 in series, and the series circuit is connected in parallel with the two ends of the circuit after the normally open contact of the first time relay KT1 and the automatic gear switch are connected to form a control locking loop.
The two ends of the serial circuit of the manual gear switch and the starting button SB2 are also connected with normally open contacts of the relay 1ZJ in parallel to form a self-holding loop.
The first normally-closed contact of the vacuum contactor KM and the normally-open contact of the intermediate relay KA are sequentially connected in series, and the second time relay KT2 is connected in series.
The second normally-closed contacts of the vacuum contactor KM are connected in parallel with the two ends of the first normally-closed contacts of the vacuum contactor KM.
And the normally open contact and the short-circuit display lamp of the vacuum contactor KM are connected in series.
One end of a second normally open contact of the second time relay KT2 is connected with the PLC, and the other end of the second normally open contact is connected with a power supply. In the feeder cabinet, the first normally open contact of the second time relay KT2 controls the on-off of the breaker QF, when the first normally open contact of the second time relay KT2 is electrically closed, the breaker QF is attracted, otherwise, the breaker QF is opened.
The electric power generator further comprises a start indicator lamp which is connected in parallel with two ends of the coil of the second time relay KT2.
The positive and negative output ends of the power supply are connected in series with an air switch 2ZK.
The working process of the system is as follows:
when the normal starting condition of the feeder cabinet is met, the breaker QF is sucked, high-voltage electricity reaches the upper port of the reactor cabinet through the cable and the air switch 2ZK, at the moment, the vacuum contactor KM in the reactor cabinet is not sucked, so the high-voltage electricity is applied to the reactor, when the breaker QF in the delay starting loop is closed, the delay loop is started, the intermediate relay KA and the time relay KT1 are sucked, the contacts of the time relay KT1 and the intermediate relay KA in the corresponding reactor cabinet closing loop are closed, if the control stop button SB is closed, the switching knob SB1 is closed at the automatic gear switch, the closing loop condition of the reactor cabinet is met, the relay 1ZJ is sucked, the normally open contact of the relay 1ZJ is closed, namely the vacuum contactor control loop is conducted, namely the vacuum contactor KM coil in the loop is sucked, after the vacuum contactor KM is sucked, the vacuum contactor and the reactor are connected in parallel, the resistance of the vacuum contactor is far smaller than the resistance of the reactor, the current is conducted from the low-resistance contactor branch of the motor, so the power supply loop is completely shorted, and the power supply loop is safely started, and the power supply loop is formed.
When the vacuum contactor KM is powered on, normally, a normally open contact of the vacuum contactor KM is closed, namely a short circuit indicator lamp is lighted, a first normally closed contact of the vacuum contactor KM and a second normally closed contact of the vacuum contactor KM are opened, and a timing overrun loop is started to be disconnected. When abnormal conditions occur, the first normally-closed contact of the vacuum contactor KM and the second normally-closed contact of the vacuum contactor KM are in a closed state, at the moment, the coil of the second time relay KT2 is electrified, namely, a starting timing overrun loop is started, after the second time relay KT2 is delayed for 20 seconds, the first normally-open contact of the second time relay KT2 and the second normally-open contact of the second time relay KT2 are closed, the breaker QF is disconnected due to the disconnection of the first normally-open contact of the second time relay KT2, the coil of the vacuum contactor KM is finally powered off, short-circuit failure is caused, and meanwhile, the second normally-open contact of the second time relay KT2 enables the PLC to send an alarm signal of the failure of the short-circuit reactor.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. The reactor cabinet control circuit is characterized by comprising a breaker QF, an intermediate relay KA, a relay 1ZJ, a vacuum contactor KM and a power supply; the circuit comprises a delay starting circuit, a closing circuit and a vacuum contactor control circuit, wherein the delay starting circuit, the closing circuit and the vacuum contactor control circuit are connected in parallel and are connected to two ends of a power supply;
the delay starting circuit is formed by serially connecting coils of a breaker QF and an intermediate relay KA;
the switching-on loop is formed by connecting a normally open contact of the intermediate relay KA with a coil of the relay 1ZJ in series;
the vacuum contactor control loop is that a normally open contact of the relay 1ZJ is connected with a coil of the vacuum contactor KM;
the reactor cabinets are connected in parallel at two ends of the power supply;
the circuit also comprises a first time relay KT1, wherein the coil of the first time relay KT1 is connected in parallel with the two ends of the coil of the intermediate relay KA, and the normally open contact of the first time relay KT1 is arranged on the closing circuit and is connected in series with the normally open contact of the intermediate relay KA;
the starting timing overrun loop comprises a first normally-closed contact of a vacuum contactor KM, a normally-open contact of an intermediate relay KA and a second time relay KT2; the starting timing overrun loop is connected in parallel with two ends of the power supply; the first normally-closed contact of the vacuum contactor KM, the normally-open contact of the intermediate relay KA and the second time relay KT2 are sequentially connected in series, and the first normally-open contact of the second time relay KT2 controls the on-off of the breaker QF;
the vacuum contactor comprises a vacuum contactor KM, a first normally-closed contact and a second normally-closed contact, wherein the first normally-closed contact is connected with the vacuum contactor KM in parallel;
the breaker QF is attracted, high-voltage electricity reaches an upper port of the reactor cabinet, because the vacuum contactor KM in the reactor cabinet is not attracted yet, the high-voltage electricity is added to the reactor cabinet, when the breaker QF is attracted in the delay starting circuit, the delay starting circuit is started, the intermediate relay KA and the first time relay KT1 are attracted, the normally open contact of the first time relay KT1 and the normally open contact of the intermediate relay KA in the closing circuit are closed, the relay 1ZJ is attracted, the normally open contact of the relay 1ZJ is closed, the vacuum contactor control circuit is conducted, the coil of the vacuum contactor KM in the vacuum contactor control circuit is attracted, current flows from a branch of the vacuum contactor KM with low resistance, and the short circuit work of the reactor cabinet is completed;
when the vacuum contactor KM is powered on, under normal conditions, a first normally-closed contact of the vacuum contactor KM and a second normally-closed contact of the vacuum contactor KM are opened, a starting timing overrun loop is opened, and when abnormal conditions occur, the first normally-closed contact of the vacuum contactor KM and the second normally-closed contact of the vacuum contactor KM are in a closed state, a coil of the second time relay KT2 is powered on, and the starting timing overrun loop is started.
2. The reactor cabinet control circuit of claim 1, further comprising a stop button SB, a shift knob SB1, a start button SB2, the shift knob comprising an automatic shift switch and a manual shift switch;
the stop button SB is connected with two ends of the automatic gear switch in series and then connected on the switching-on loop in series;
the manual gear switch is connected with the starting button SB2 in series, and the series circuit is connected in parallel with the two ends of the circuit after the normally open contact of the first time relay KT1 and the automatic gear switch are connected to form a control locking loop.
3. The reactor cabinet control circuit according to claim 2, wherein the two ends of the series circuit of the manual gear switch and the start button SB2 are further connected with normally open contacts of the relay 1ZJ in parallel to form a self-holding loop.
4. The reactor cabinet control circuit of claim 1, comprising a shorting display loop connected in parallel across the power supply; the short circuit display loop comprises a normally open contact and a short circuit display lamp of the vacuum contactor KM, and the normally open contact and the short circuit display lamp of the vacuum contactor KM are connected in series.
5. The reactor cabinet control circuit of claim 1, further comprising a second normally open contact of the second time relay KT2 and a PLC, wherein one end of the second normally open contact of the second time relay KT2 is connected to the PLC, and the other end is connected to a power supply.
6. The reactor cabinet control circuit of claim 1, further comprising a start indicator lamp connected in parallel across the coil of the second time relay KT2.
7. The reactor cabinet control circuit according to claim 1, wherein the positive and negative output terminals of the power supply are each connected in series with an air switch 2ZK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710146546.1A CN106655898B (en) | 2017-03-13 | 2017-03-13 | Reactor cabinet control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710146546.1A CN106655898B (en) | 2017-03-13 | 2017-03-13 | Reactor cabinet control circuit |
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| CN106655898A CN106655898A (en) | 2017-05-10 |
| CN106655898B true CN106655898B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710146546.1A Active CN106655898B (en) | 2017-03-13 | 2017-03-13 | Reactor cabinet control circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181238A (en) * | 2017-07-18 | 2017-09-19 | 攀钢集团西昌钢钒有限公司 | Distribution system high-voltage motor control loop |
| CN109087823A (en) * | 2018-10-18 | 2018-12-25 | 广州白云电器设备股份有限公司 | The device and switchgear of antiground switch indication light Pre-handoff |
| CN109599279B (en) * | 2018-12-29 | 2024-03-22 | 国家电网有限公司 | Control device of circuit breaker |
| CN110095679A (en) * | 2019-05-15 | 2019-08-06 | 国电南瑞科技股份有限公司 | A kind of current supply circuit detection device and method |
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| JPH05292767A (en) * | 1992-04-06 | 1993-11-05 | Mitsubishi Electric Corp | Reactor starter for induction motor |
| CN2367001Y (en) * | 1999-02-11 | 2000-03-01 | 高文革 | Frequency sensitive rheostat starting protective arrangement for threephase asynchronous motor |
| CN103500985A (en) * | 2013-10-10 | 2014-01-08 | 鞍钢集团矿业公司 | Protection device and method for rotary supporting bearing and driving motor of thickener |
| CN205335731U (en) * | 2016-01-22 | 2016-06-22 | 山东先河悦新机电股份有限公司 | Mining general type handcart -type of dual supply high pressure vacuum starting switch cabinet |
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| CN106655898A (en) | 2017-05-10 |
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