CN110266099A - A kind of three phase mains switching device and its working method - Google Patents
A kind of three phase mains switching device and its working method Download PDFInfo
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- CN110266099A CN110266099A CN201910479833.3A CN201910479833A CN110266099A CN 110266099 A CN110266099 A CN 110266099A CN 201910479833 A CN201910479833 A CN 201910479833A CN 110266099 A CN110266099 A CN 110266099A
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- contactor
- auxiliary contact
- relay
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- opened auxiliary
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a kind of three phase mains switching devices, it includes main power source, backup power source, first circuit breaker Q F1, second circuit breaker Q F2, first electrothermal relay FR1, second electrothermal relay FR2, third electrothermal relay FR3, first contactor KM1, second contactor KM2, third contactor KM3, 4th contactor KM4, first intermediate relay KA1, second intermediate relay KA2, third intermediate relay KA3, first time relay KT1, second time relay KT2, first indicator light H1, second indicator light H2, third indicator light H3, 4th indicator light H4, first terminal arranges X1.The invention also discloses a kind of working methods of three phase mains switching device, can be realized the automatic switchover of two-way three phase mains, improve the reliability of power supply system.
Description
Technical field
The present invention relates to a kind of three phase mains switching device and its working methods.
Background technique
In thermal power plant, in order to improve the reliability of power supply system, double loop power supply is often used to provide for equipment dynamic
Power, when mains power failure, accessory power supply can quickly access current supply circuit, not will lead to the stoppage in transit of equipment.It is main in order to reach
The purpose that stand-by power source is switched fast is needed using reliable power transfer device, and such as application No. is in 201610722757.0
State's patent.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of three phase mains switching dress
It sets and its working method, can be realized the automatic switchover of two-way three phase mains, improve the reliability of power supply system.
Technical solution used by the present invention solves the above problems is: a kind of three phase mains switching device, it is characterised in that:
Including main power source, backup power source, the first circuit breaker Q F1, the second circuit breaker Q F2, the first electrothermal relay FR1, the second electrothermal relay
FR2, the main contacts of first contactor KM1, second contactor KM2 main contacts；A1 phase, B1 phase, the C1 phase point of the main power source
It is not connected with the main contacts 1,3,5 of the first circuit breaker Q F1；The main contacts 2,4,6 of the first circuit breaker Q F1 is warm with first respectively
The main contacts 1,3,5 of relay FR1 is connected；The main contacts 2,4,6 of the first electrothermal relay FR1 respectively with first contactor
The main contacts 1,3,5 of KM1 is connected；The main contacts 2,4,6 of the first contactor KM1 respectively with the main touching of second contactor KM2
Point 2,4,6 is connected, meanwhile, and output is connected to load.
Further, three phase mains switching device further includes main power source indicating circuit, backup power source indicating circuit, main power source
Working indicating, backup power source working indicating；Wherein, the loop A 1 of the first intermediate relay KA1, the first indicator light H1
X1 be connected with the main contacts 6 of the first electrothermal relay, the X2 of the loop A 2 of the first intermediate relay KA1, the first indicator light H1
It is connected with N；The loop A 1 of second intermediate relay KA2, the second indicator light H2 X1 it is equal be connected with N, the second intermediate relay
The loop A 2 of KA2, the second indicator light H2 X2 be connected with the main contacts 2 of the second electrothermal relay FR2；The X1 of third indicator light H3
It is connected with the normally opened auxiliary contact 14 of first contactor KM1, the normally opened auxiliary of the X1 and second contactor KM2 of the 4th indicator light H4
Contact 14 is connected, the normally opened auxiliary contact 13 of first contactor KM1, second contactor KM2 normally opened auxiliary contact 13 and N phase
Even, the X2 of third indicator light H3, the X2 of the 4th indicator light H4 are connected with the main contacts 2 of second contactor KM2.
Further, three phase mains switching device further includes double loop power supply locked loop, the double loop power supply locked loop
Including third electrothermal relay FR3, third contactor KM3, the 4th contactor KM4, first time relay KT1, the second time after
Electric appliance KT2；Wherein, the loop A 2 of first contactor KM1, the loop A 1 of second contactor KM2, first time relay KT1
Loop A 2, the loop A 1 of the second time relay KT2, the loop A 2 of third intermediate relay KA3 are connected with N；First contact
The loop A 1 of device KM1 is connected with the normally closed auxiliary contact 12 of second contactor KM2,1 He of loop A of third intermediate relay KA3
The normally opened auxiliary contact 4 of first time relay KT1 are connected, the normally closed auxiliary contact 11 of second contactor KM2, at the first time after
The normally opened auxiliary contact 3 of electric appliance KT1, the loop A 1 of first time relay KT1 are touched with the normally opened auxiliary of the 4th contactor KM4
Point 14 is connected, and the normally opened auxiliary contact 13 of the 4th contactor KM4 are connected with the normally opened auxiliary contact 14 of third contactor KM3, the
The normally opened auxiliary contact 13 of three contactor KM3 are connected with the main contacts 2 of third electrothermal relay FR3, the master of third electrothermal relay FR3
Contact 1 is connected with the main contacts 6 of the first electrothermal relay FR1；The loop A 2 of second contactor KM2 and the second time relay KT2
Normally opened auxiliary contact 3 be connected, the coil of the normally opened auxiliary contact 4 of the second time relay KT2, the second time relay KT2
A2 is connected with the normally closed auxiliary contact 4 of third intermediate relay KA3, the normally closed auxiliary contact 12 of third intermediate relay KA3
It is connected with the normally closed auxiliary contact 12 of first contactor KM1, the normally closed auxiliary contact 11 of first contactor KM1 and the second hot relay
The main contacts 2 of device FR2 is connected.
Further, three phase mains switching device further includes status signal output circuit, the status signal output circuit
Normally opened auxiliary including first terminal row X1, the normally opened auxiliary contact of the first intermediate relay KA1, the second intermediate relay KA2
Contact, the normally opened auxiliary contact of first contactor KM1 and second contactor KM2 normally opened auxiliary contact；Wherein, among first after
The normally opened auxiliary contact 5 of electric appliance KA1 are connected with the 1 of first terminal row X1, the normally opened auxiliary contact 9 of the first intermediate relay KA1
It is connected with the 2 of first terminal row X1；The normally opened auxiliary contact 5 of second intermediate relay KA2 are connected with the 3 of first terminal row X1,
The normally opened auxiliary contact 9 of second intermediate relay KA2 are connected with the 4 of first terminal row X1；The normally opened auxiliary of first contactor KM1
Contact 23 is connected with the 5 of first terminal row X1,6 phases of normally opened auxiliary contact 24 and first terminal the row X1 of first contactor KM1
Even；The normally opened auxiliary contact 23 of second contactor KM2 are connected with the 7 of first terminal row X1, the normally opened auxiliary of second contactor KM2
Contact 24 is connected with the 8 of first terminal row X1.
Further, the normally opened auxiliary contact timing closing time of the first time relay KT1 is 2s.
Further, the normally opened auxiliary contact timing closing time of second time relay KT2 is 60s.
Further, the first indicator light H1, the second indicator light H2, third indicator light H3 and the 4th indicator light H4 are
Red indicating light.
The working method of the three phase mains switching device is as follows:
(1) the first circuit breaker Q F1 and the second circuit breaker Q F2 are closed when working, first contactor KM1, which is powered, to be attracted, often
Main contacts closure is opened, the normally opened auxiliary contact closure of third contactor KM3 and the 4th contactor KM4, main power source is load supplying；
(2) it was connecting for the second circuit breaker Q F2 moment, the second time relay KT2, which is powered, to be attracted, but in the normally opened of its timing closing
Before auxiliary contact are connected, the normally closed auxiliary contact of first contactor KM1 is disconnected, and the second time relay KT2 powers off release again,
Second contactor KM2 can not be attracted；
(3) after main power source is powered off because of failure, first contactor KM1, third intermediate relay KA3, first time relay KT1
It discharges, the normally opened main contacts of first contactor KM1 disconnects, and first contactor KM1 and third intermediate relay KA3's is normally closed auxiliary
Contact closure is helped, the second time relay KT2 is attracted, is delayed after 2s, the normally opened auxiliary contact of the second time relay KT2 connect
Logical, second contactor KM2, which is powered, to be attracted, and normally opened main contacts is connected, and backup power source is load supplying；
(4) when working power restores electricity, first time relay KT1 obtain it is electric, be delayed 60s after, first time relay KT1
Normally opened auxiliary contact closure, third intermediate relay KA3 obtain electric actuation, and normally closed auxiliary contact disconnects, second time relay
The normally closed auxiliary contact of KT2 and second contactor KM2 release, second contactor KM2 is connected, and first contactor KM1 obtains electric actuation,
Restoring main power source again is load supplying.
Compared with prior art, the present invention having the following advantages that and effect: three phase mains switching device proposed by the present invention
Simply, reliably, using conveniently, when mains power failure, it can be rapidly switched to backup power source circuit, when main power source restores it
Afterwards, and it is switched to main power circuit, improves the reliability of power supply system.
Detailed description of the invention
Fig. 1 is the electrical schematic diagram of the embodiment of the present invention.
Fig. 2 is the status signal output principle figure of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Three phase mains switching device in the present embodiment, as shown in Figure 1, including main power source, backup power source, the first breaker
QF1, the second circuit breaker Q F2, the first electrothermal relay FR1, the second electrothermal relay FR2, third electrothermal relay FR3, first contactor
KM1, second contactor KM2, third contactor KM3, the 4th contactor KM4, the first intermediate relay KA1, the second intermediate relay
Device KA2, third intermediate relay KA3, first time relay KT1, the second time relay KT2, the first indicator light H1, second
Indicator light H2, first terminal arrange X1.
A1 phase, B1 phase, the C1 phase of main power source are connected with the main contacts 1,3,5 of the first circuit breaker Q F1 respectively；First breaker
The main contacts 2,4,6 of QF1 is connected with the main contacts 1,3,5 of the first electrothermal relay FR1 respectively；The main touching of first electrothermal relay FR1
Point 2,4,6 is connected with the main contacts of first contactor KM1 1,3,5 respectively；The main contacts 2,4,6 of first contactor KM1 respectively with
The main contacts 2,4,6 of second contactor KM2 is connected, meanwhile, and output is connected to load.
The loop A 1 of first intermediate relay KA1, the first indicator light H1 X1 and the first electrothermal relay 6 phase of main contacts
Even, the loop A 2 of the first intermediate relay KA1, the first indicator light H1 X2 equal be connected with N；The line of second intermediate relay KA2
Circle A1, the second indicator light H2 X1 it is equal be connected with N, the loop A 2 of the second intermediate relay KA2, the second indicator light H2 X2 it is equal and
The main contacts 2 of second electrothermal relay FR2 is connected；The normally opened auxiliary contact 14 of the X1 and first contactor KM1 of third indicator light H3
It is connected, the normally opened auxiliary contact 14 of the X1 and second contactor KM2 of the 4th indicator light H4 are connected, and first contactor KM1's is normally opened
Auxiliary contact 13, second contactor KM2 normally opened auxiliary contact 13 be connected with N, X2, the 4th indicator light of third indicator light H3
The X2 of H4 is connected with the main contacts 2 of second contactor KM2.
The loop A 2 of first contactor KM1, the loop A 1 of second contactor KM2, first time relay KT1 coil
A2, the loop A 1 of the second time relay KT2, the loop A 2 of third intermediate relay KA3 are connected with N；First contactor KM1
Loop A 1 be connected with the normally closed auxiliary contact 12 of second contactor KM2, the loop A 1 of third intermediate relay KA3 and when first
Between relay KT1 normally opened auxiliary contact 4 be connected, normally closed auxiliary contact 11, the first time relay of second contactor KM2
The normally opened auxiliary contact 3 of KT1, first time relay KT1 loop A 1 and the normally opened auxiliary contact 14 of the 4th contactor KM4
It is connected, the normally opened auxiliary contact 13 of the 4th contactor KM4 are connected with the normally opened auxiliary contact 14 of third contactor KM3, and third connects
The normally opened auxiliary contact 13 of tentaculum KM3 are connected with the main contacts 2 of third electrothermal relay FR3, the main contacts of third electrothermal relay FR3
1 is connected with the main contacts 6 of the first electrothermal relay FR1；The loop A 2 of second contactor KM2 and the second time relay KT2's is normal
It opens auxiliary contact 3 to be connected, the normally opened auxiliary contact 4 of the second time relay KT2, the loop A 2 of the second time relay KT2 are equal
It is connected with the normally closed auxiliary contact 4 of third intermediate relay KA3, the normally closed auxiliary contact 12 of third intermediate relay KA3 and
The normally closed auxiliary contact 12 of one contactor KM1 is connected, the normally closed auxiliary contact 11 and the second electrothermal relay of first contactor KM1
The main contacts 2 of FR2 is connected.
As shown in Fig. 2, the normally opened auxiliary contact 5 of the first intermediate relay KA1 are connected with the 1 of first terminal row X1, first
The normally opened auxiliary contact 9 of intermediate relay KA1 are connected with the 2 of first terminal row X1；The normally opened auxiliary of second intermediate relay KA2
Contact 5 is connected with the 3 of first terminal row X1, and the 4 of normally opened auxiliary contact 9 and first terminal the row X1 of the second intermediate relay KA2
It is connected；The normally opened auxiliary contact 23 of first contactor KM1 are connected with the 5 of first terminal row X1, and first contactor KM1's is normally opened auxiliary
Contact 24 is helped to be connected with the 6 of first terminal row X1；The 7 of normally opened auxiliary contact 23 and first terminal the row X1 of second contactor KM2
It is connected, the normally opened auxiliary contact 24 of second contactor KM2 are connected with the 8 of first terminal row X1.
In the present embodiment, the normally opened auxiliary contact timing closing time of first time relay KT1 is 2s.
In the present embodiment, the normally opened auxiliary contact timing closing time of the second time relay KT2 is 60s.
In the present embodiment, the first indicator light H1, the second indicator light H2, third indicator light H3 and the 4th indicator light H4 are
Red indicating light.
Working method is as follows:
(1) the first circuit breaker Q F1 and the second circuit breaker Q F2 are closed when working, first contactor KM1, which is powered, to be attracted, often
Main contacts closure is opened, the normally opened auxiliary contact closure of third contactor KM3 and the 4th contactor KM4, main power source is load supplying；
(2) it was connecting for the second circuit breaker Q F2 moment, the second time relay KT2, which is powered, to be attracted, but in the normally opened of its timing closing
Before auxiliary contact are connected, the normally closed auxiliary contact of first contactor KM1 is disconnected, and the second time relay KT2 powers off release again,
Second contactor KM2 can not be attracted；
(3) after main power source is powered off because of failure, first contactor KM1, third intermediate relay KA3, first time relay KT1
It discharges, the normally opened main contacts of first contactor KM1 disconnects, and first contactor KM1 and third intermediate relay KA3's is normally closed auxiliary
Contact closure is helped, the second time relay KT2 is attracted, is delayed after 2s, the normally opened auxiliary contact of the second time relay KT2 connect
Logical, second contactor KM2, which is powered, to be attracted, and normally opened main contacts is connected, and backup power source is load supplying；
(4) when working power restores electricity, first time relay KT1 obtain it is electric, be delayed 60s after, first time relay KT1
Normally opened auxiliary contact closure, third intermediate relay KA3 obtain electric actuation, and normally closed auxiliary contact disconnects, second time relay
The normally closed auxiliary contact of KT2 and second contactor KM2 release, second contactor KM2 is connected, and first contactor KM1 obtains electric actuation,
Restoring main power source again is load supplying.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology should belong to guarantor of the invention in made change without departing from the spirit and scope of the invention
Protect range.
Claims (8)
1. a kind of three phase mains switching device, it is characterised in that: including main power source, backup power source, the first circuit breaker Q F1, second
Circuit breaker Q F2, the first electrothermal relay FR1, the second electrothermal relay FR2, the main contacts of first contactor KM1, second contactor KM2
Main contacts；A1 phase, B1 phase, the C1 phase of the main power source are connected with the main contacts 1,3,5 of the first circuit breaker Q F1 respectively；It is described
The main contacts 2,4,6 of first circuit breaker Q F1 is connected with the main contacts 1,3,5 of the first electrothermal relay FR1 respectively；It is described first heat after
The main contacts 2,4,6 of electric appliance FR1 is connected with the main contacts of first contactor KM1 1,3,5 respectively；The first contactor KM1's
Main contacts 2,4,6 is connected with the main contacts of second contactor KM2 2,4,6 respectively, meanwhile, and output is connected to load.
2. three phase mains switching device according to claim 1, it is characterised in that: further include main power source indicating circuit, standby
With power indicating circuit, main power source working indicating, backup power source working indicating；Wherein, the first intermediate relay KA1
Loop A 1, the first indicator light H1 X1 be connected with the main contacts 6 of the first electrothermal relay, the line of the first intermediate relay KA1
Circle A2, the first indicator light H1 X2 equal be connected with N；The loop A 1 of second intermediate relay KA2, the second indicator light H2 X1 and
N be connected, the loop A 2 of the second intermediate relay KA2, the second indicator light H2 X2 and the second electrothermal relay FR2 main contacts 2
It is connected；The normally opened auxiliary contact 14 of the X1 and first contactor KM1 of third indicator light H3 are connected, the X1 of the 4th indicator light H4 and
The normally opened auxiliary contact 14 of two contactor KM2 are connected, the normally opened auxiliary contact 13 of first contactor KM1, second contactor KM2
Normally opened auxiliary contact 13 are connected with N, the X2 of third indicator light H3, the 4th indicator light H4 X2 and second contactor KM2
Main contacts 2 is connected.
3. three phase mains switching device according to claim 1, it is characterised in that: it further include double loop power supply locked loop,
The double loop power supply locked loop includes third electrothermal relay FR3, third contactor KM3, the 4th contactor KM4, first time
Relay KT1, the second time relay KT2；Wherein, the loop A 2 of first contactor KM1, the loop A 1 of second contactor KM2,
The loop A 2 of first time relay KT1, the loop A 1 of the second time relay KT2, the loop A 2 of third intermediate relay KA3
It is connected with N；The loop A 1 of first contactor KM1 is connected with the normally closed auxiliary contact 12 of second contactor KM2, among third after
The loop A 1 of electric appliance KA3 is connected with the normally opened auxiliary contact 4 of first time relay KT1, the normally closed auxiliary of second contactor KM2
Contact 11, the normally opened auxiliary contact 3 of first time relay KT1, first time relay KT1 loop A 1 with the 4th contact
The normally opened auxiliary contact 14 of device KM4 are connected, and the normally opened auxiliary contact 13 of the 4th contactor KM4 and third contactor KM3's is normally opened
Auxiliary contact 14 are connected, and the normally opened auxiliary contact 13 of third contactor KM3 are connected with the main contacts 2 of third electrothermal relay FR3, the
The main contacts 1 of three electrothermal relay FR3 is connected with the main contacts 6 of the first electrothermal relay FR1；2 He of loop A of second contactor KM2
The normally opened auxiliary contact 3 of second time relay KT2 are connected, when normally opened auxiliary contact 4, second of the second time relay KT2
Between the loop A 2 of relay KT2 be connected with the normally closed auxiliary contact 4 of third intermediate relay KA3, third intermediate relay KA3
Normally closed auxiliary contact 12 be connected with the normally closed auxiliary contact 12 of first contactor KM1, the touching of the normally closed auxiliary of first contactor KM1
Point 11 is connected with the main contacts 2 of the second electrothermal relay FR2.
4. three phase mains switching device according to claim 1, it is characterised in that: it further include status signal output circuit,
The status signal output circuit includes first terminal row X1, the normally opened auxiliary contact of the first intermediate relay KA1, among second
The normally opened auxiliary of the normally opened auxiliary contact of relay KA2, the normally opened auxiliary contact of first contactor KM1 and second contactor KM2
Contact；Wherein, the normally opened auxiliary contact 5 of the first intermediate relay KA1 are connected with the 1 of first terminal row X1, the first intermediate relay
The normally opened auxiliary contact 9 of device KA1 are connected with the 2 of first terminal row X1；5 He of normally opened auxiliary contact of second intermediate relay KA2
The 3 of first terminal row X1 are connected, and the normally opened auxiliary contact 9 of the second intermediate relay KA2 are connected with the 4 of first terminal row X1；The
The normally opened auxiliary contact 23 of one contactor KM1 are connected with the 5 of first terminal row X1, the normally opened auxiliary contact of first contactor KM1
24 are connected with the 6 of first terminal row X1；The normally opened auxiliary contact 23 of second contactor KM2 are connected with the 7 of first terminal row X1, the
The normally opened auxiliary contact 24 of two contactor KM2 are connected with the 8 of first terminal row X1.
5. three phase mains switching device according to claim 3, it is characterised in that: the first time relay KT1's
The normally opened auxiliary contact timing closing time is 2s.
6. three phase mains switching device according to claim 3, it is characterised in that: second time relay KT2's
The normally opened auxiliary contact timing closing time is 60s.
7. three phase mains switching device according to claim 2, it is characterised in that: the first indicator light H1, second refer to
Show that lamp H2, third indicator light H3 and the 4th indicator light H4 are red indicating light.
8. a kind of working method of the three phase mains switching device as described in any one of claim 1 ~ 7, it is characterised in that: mistake
Journey is as follows:
(1) the first circuit breaker Q F1 and the second circuit breaker Q F2 are closed when working, first contactor KM1, which is powered, to be attracted, often
Main contacts closure is opened, the normally opened auxiliary contact closure of third contactor KM3 and the 4th contactor KM4, main power source is load supplying；
(2) it was connecting for the second circuit breaker Q F2 moment, the second time relay KT2, which is powered, to be attracted, but in the normally opened of its timing closing
Before auxiliary contact are connected, the normally closed auxiliary contact of first contactor KM1 is disconnected, and the second time relay KT2 powers off release again,
Second contactor KM2 can not be attracted；
(3) after main power source is powered off because of failure, first contactor KM1, third intermediate relay KA3, first time relay KT1
It discharges, the normally opened main contacts of first contactor KM1 disconnects, and first contactor KM1 and third intermediate relay KA3's is normally closed auxiliary
Contact closure is helped, the second time relay KT2 is attracted, is delayed after 2s, the normally opened auxiliary contact of the second time relay KT2 connect
Logical, second contactor KM2, which is powered, to be attracted, and normally opened main contacts is connected, and backup power source is load supplying；
(4) when working power restores electricity, first time relay KT1 obtain it is electric, be delayed 60s after, first time relay KT1
Normally opened auxiliary contact closure, third intermediate relay KA3 obtain electric actuation, and normally closed auxiliary contact disconnects, second time relay
The normally closed auxiliary contact of KT2 and second contactor KM2 release, second contactor KM2 is connected, and first contactor KM1 obtains electric actuation,
Restoring main power source again is load supplying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479833.3A CN110266099B (en) | 2019-06-04 | 2019-06-04 | Three-phase power supply switching device and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479833.3A CN110266099B (en) | 2019-06-04 | 2019-06-04 | Three-phase power supply switching device and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110266099A true CN110266099A (en) | 2019-09-20 |
| CN110266099B CN110266099B (en) | 2023-11-14 |
Family
ID=67916615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910479833.3A Active CN110266099B (en) | 2019-06-04 | 2019-06-04 | Three-phase power supply switching device and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110266099B (en) |
Cited By (1)
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| CN112260393A (en) * | 2020-10-20 | 2021-01-22 | 新誉庞巴迪信号系统有限公司 | Automatic switching circuit and method for cold standby redundancy system |
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