CN201656555U - Three-power-supply automatic switching-over device - Google Patents

Three-power-supply automatic switching-over device Download PDF

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Publication number
CN201656555U
CN201656555U CN2010202084314U CN201020208431U CN201656555U CN 201656555 U CN201656555 U CN 201656555U CN 2010202084314 U CN2010202084314 U CN 2010202084314U CN 201020208431 U CN201020208431 U CN 201020208431U CN 201656555 U CN201656555 U CN 201656555U
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CN
China
Prior art keywords
power supply
stand
switching
module
lead
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Expired - Lifetime
Application number
CN2010202084314U
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Chinese (zh)
Inventor
王勇
吴明宇
张红军
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Longjing Kejie environmental protection technology (Shanghai) Co., Ltd.
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Shanghai Longking Environmental Protection Co Ltd
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Priority to CN2010202084314U priority Critical patent/CN201656555U/en
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Publication of CN201656555U publication Critical patent/CN201656555U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses a three-power-supply automatic switching-over device, which comprises a working power supply, a first emergency power supply, a second emergency power supply, and incoming circuit breakers Q1, Q2 and Q3 which are respectively connected with the working power supply, the first emergency power supply and the second emergency power supply, wherein a switching value connecting terminal of the three-power-supply is connected with an upper computer through a switching value input/output module; the upper computer comprises a Q1 tripping module, a Q2 switching-on module and a Q3 switching-on module; when the voltage of the bus is low, the working power supply is disconnected, and the emergency power supply is switched on, when the first emergency power supply can not be normally switched on, the second emergency power supply is switched on to supply power. The upper computer is of a DCS system or PLC system. The beneficial effects of the utility model are that the three-power-supply automatic switching-over device adopts the upper computer control device to realize the automatic switching-over of three power supplies, is convenient to maintain and reduces the cost. And in addition, the utility model adopts the switching-over way of break-before-make, and ensures safe and reliable switching of the emergency power supply.

Description

Three-power supply automatic switching device
Technical field
The utility model relates to a kind of automatic switching control equipment of three-way power.
Background technology
When there is the three-way power inlet wire in motor control center (hereinafter to be referred as MCC), usually, two cover double-power supply switching devices are adopted in the switching of MCC three-way power inlet wire, promptly adopt the first cover double-power supply switching device that the first via and the second road power supply are switched back output earlier, and then switch with the output and the 3rd power supply of the second cover double-power supply switching device with the first cover double-power supply switching device; Perhaps adopting relay to build logical circuit switches.
Said method equipment is more, has increased fault point and maintenance workload, and needs the use that cooperatively interacts of two cover double-power supply switching devices, and cost is higher.
The utility model content
Technical problem to be solved in the utility model provides a kind of three-power supply automatic switching device, and is easy to maintenance, reduces cost.
For solving the problems of the technologies described above the technical scheme that adopts be: a kind of three-power supply automatic switching device is provided, comprise working power, first stand-by power supply, second stand-by power supply and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; Wherein, the switching value binding post of described three power supplys links to each other with host computer by the switching value input/output module; Described host computer comprises: the Q1 module that trips, monitor busbar voltage, and when the MCC busbar voltage is low, think that working power breaks down, described Q1 tripping operation module output Q1 trip signal disconnects working power; Q2 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and the described first stand-by power supply side voltage normal, described Q2 combined floodgate module output Q2 switching signal, the first stand-by power supply lead-in circuit breaker Q2 closure is powered by described first stand-by power supply; Q3 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and described first stand-by power supply can not normally drop into, described Q3 combined floodgate module output Q3 switching signal, the second stand-by power supply lead-in circuit breaker Q3 closure is powered by described second stand-by power supply.
Above-mentioned three-power supply automatic switching device, wherein, the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer by switching input module; State output end of working power, first stand-by power supply and second stand-by power supply links to each other with host computer by switching input module; Described host computer links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.
Above-mentioned three-power supply automatic switching device, described host computer are DCS system or PLC system.
The utility model contrast prior art has following beneficial effect: three-power supply automatic switching device utilizes the PC control device to realize that three power supplys automatically switch, and is easy to maintenance, reduces cost; Adopt the switching mode of break-before-make, it is safe and reliable to have guaranteed that stand-by power supply drops into.
Description of drawings
Fig. 1 is MCC three electric power incoming line principle winding diagrams;
Fig. 2 is the host computer high-level schematic functional block diagram;
Fig. 3 is a host computer logic control schematic diagram;
Fig. 4 is MCC three electric power incoming line automatic switchover flow charts.
Among the figure: the 1-working power; 2-first stand-by power supply; 3-second stand-by power supply; The 4-Q1 module that trips; 5-Q2 combined floodgate module; 6-Q3 combined floodgate module; The 7-host computer; 8-switching value input/output module; 9-switching value binding post.
Q1-working power lead-in circuit breaker; The Q2-first stand-by power supply lead-in circuit breaker; The Q3-second stand-by power supply lead-in circuit breaker; The PT-bus-bar potential transformer; FU-protects fuse.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 1 is MCC three electric power incoming line principle winding diagrams; Fig. 2 is the host computer high-level schematic functional block diagram.
See also Fig. 1 and Fig. 2, three-power supply automatic switching device of the present utility model comprises working power 1, first stand-by power supply, 2, the second stand-by power supplies 3 and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; Wherein, the switching value binding post 9 of described three power supplys links to each other with host computer 7 by switching value input/output module 8; Described host computer 7 comprises Q1 tripping operation module 4, Q2 combined floodgate module 5 and Q3 combined floodgate module 6.
The Q1 module 4 that trips monitors busbar voltage, when the MCC busbar voltage is low, thinks that working power breaks down, 7 Q1 trip signals of described host computer, i.e. and Q1 tripping operation module 4 output Q1 trip signals disconnect working power;
Q2 combined floodgate module 5, after described working power lead-in circuit breaker Q1 tripping operation and described first stand-by power supply normal, promptly the first stand-by power supply side voltage is normal, the first stand-by power supply state output end fault-free signal, described host computer is sent out the order of Q2 combined floodgate, be Q2 combined floodgate module 5 output Q2 switching signals, the first stand-by power supply lead-in circuit breaker Q2 closure is by described first stand-by power supply power supply;
Q3 combined floodgate module 6, after described working power lead-in circuit breaker Q1 tripping operation and described first stand-by power supply can not normally drop into, promptly the first stand-by power supply side voltage is undesired, perhaps the first stand-by power supply state output end has fault-signal, described host computer is sent out the order of Q3 combined floodgate, be Q3 combined floodgate module 6 output Q3 switching signals, the second stand-by power supply lead-in circuit breaker Q3 closure is by described second stand-by power supply power supply.
The concrete wiring of switching value binding post 9 and switching value input/output module 8 is as follows: the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer 7 by switching input module; State output end of described working power 1, first stand-by power supply 2 and second stand-by power supply 3 links to each other with host computer 7 by switching input module; Described host computer 7 links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.The switching value lead-out terminal of described lead-in circuit breaker Q1, Q2 and Q3 comprises: the "on" position of Q1~Q3, tripped condition; State output end of described three power supplys comprises that fault trip, resultant fault, mains side voltage are normal, and the MCC busbar voltage is low.Described host computer 7 comprises by switching value output module output signal: the combined floodgate order of Q1~Q3, trip signal.PT is the MCC bus-bar potential transformer among Fig. 1, and for host computer 7 provides the busbar voltage low signal, FU is a PT protection fuse.Described host computer 7 can adopt the Indusstrial of German ABB ITThe AC800F system; Described switching value input/output module 8 can adopt the Indusstrial of German ABB ITThe DI810 input module of AC800F system and D0810 output module.
Fig. 3 is the utility model host computer logic control schematic diagram; Fig. 4 is MCC three electric power incoming line automatic switchover flow charts.
Please continue referring to Fig. 3 and Fig. 4, power industry distribution technique field is generally adopted dcs (hereinafter to be referred as DCS) or is used a PLC control electric equipment, it is the device that host computer can have the logic control function for DCS system or PLC system etc., be host computer below with DCS, MCC three electric power incoming line automatic switchover flow processs of the present utility model are as follows:
Step S1: when moving first, enter step S2;
Step S2: check whether three power supplys are normal,
1) if undesired, then enter step S3 and overhaul three power circuits, return step S2 after maintenance is finished;
2) if normal, then enter step S4 and disconnect Q2, Q3, closed Q1, and drop into three power supply automatic switchover logics, enter step S5 then;
Step S5: monitor the MCC busbar voltage;
Step S6: detect whether satisfy logic 1., promptly move Q1 tripping operation module 4, judge whether to need to cut off working power 1;
1) if do not satisfy, then returns step S5;
2) if satisfy, then enter step S7DCS and send out the Q1 trip signal, i.e. the tripping operation of Q1 among DCS module 4 output Q1 trip signals disconnect working power;
Step S8: detect whether satisfy logic 2., promptly move Q2 combined floodgate module 5, judge whether to need to drop into first stand-by power supply 2;
1) if satisfy, then enter step S9DCS and send out the Q2 order of closing a floodgate, i.e. 5 output Q2 switching signals of Q2 combined floodgate module among the DCS, the Q2 breaker closing by the power supply of first stand-by power supply, and skips to step S12 and withdraws from the automatic switchover logic;
2) if do not satisfy, then enter step S10;
Step S10: operation, detect whether satisfy logic 3., promptly move Q3 combined floodgate module 6, judge whether to need to drop into second stand-by power supply 3;
1) if satisfy, then enter step S11DCS and send out the Q3 order of closing a floodgate, i.e. 6 output Q3 switching signals of Q3 combined floodgate module among the DCS, the Q3 breaker closing by the power supply of second stand-by power supply, and skips to step 12 and withdraws from the automatic switchover logic;
2) if do not satisfy, then enter step S12;
Step S12: withdraw from the automatic switchover logic, and return step S3, prepare to drop into three power supply automatic switchover logics next time.
In sum, the three-power supply automatic switching device that provides of the present utility model, the switching mode of employing break-before-make, it is safe and reliable to have guaranteed that stand-by power supply drops into.In addition, this programme adopts and hauls oneself willingly into the not mode of runback, is for after dropping at stand-by power supply, guarantees that other two-way power supply under normal situation, by manually resetting, has guaranteed the safe and reliable of distribution system, and flexible operation.

Claims (3)

1. a three-power supply automatic switching device comprises working power, first stand-by power supply, second stand-by power supply and lead-in circuit breaker Q1, the Q2 and the Q3 that link to each other with described working power, first stand-by power supply and second stand-by power supply respectively; It is characterized in that the switching value binding post of described three power supplys links to each other with host computer by the switching value input/output module; Described host computer comprises:
The Q1 module that trips monitors busbar voltage, when busbar voltage is low, thinks that working power breaks down, and described Q1 tripping operation module output Q1 trip signal disconnects working power;
Q2 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and the described first stand-by power supply side voltage normal, described Q2 combined floodgate module output Q2 switching signal, the first stand-by power supply lead-in circuit breaker Q2 closure is powered by described first stand-by power supply;
Q3 combined floodgate module, when described working power lead-in circuit breaker Q1 tripping operation back and described first stand-by power supply can not normally drop into, described Q3 combined floodgate module output Q3 switching signal, the second stand-by power supply lead-in circuit breaker Q3 closure is powered by described second stand-by power supply.
2. three-power supply automatic switching device as claimed in claim 1, it is characterized in that the switching value lead-out terminal of described working power lead-in circuit breaker Q1, the first stand-by power supply lead-in circuit breaker Q2 and the second stand-by power supply lead-in circuit breaker Q3 links to each other with host computer by switching input module; State output end of described working power, first stand-by power supply and second stand-by power supply links to each other with host computer by switching input module; Described host computer links to each other by the folding lock input terminal of switching value output module and described lead-in circuit breaker Q1, Q2 and Q3.
3. three-power supply automatic switching device as claimed in claim 1 is characterized in that, described host computer is DCS system or PLC system.
CN2010202084314U 2010-05-28 2010-05-28 Three-power-supply automatic switching-over device Expired - Lifetime CN201656555U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202084314U CN201656555U (en) 2010-05-28 2010-05-28 Three-power-supply automatic switching-over device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202084314U CN201656555U (en) 2010-05-28 2010-05-28 Three-power-supply automatic switching-over device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860075A (en) * 2010-05-28 2010-10-13 上海龙净环保科技工程有限公司 Three-power supply automatic switching device
CN103795076A (en) * 2014-03-05 2014-05-14 贾继莹 Three-phase load automatic balancer and phase changing device thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860075A (en) * 2010-05-28 2010-10-13 上海龙净环保科技工程有限公司 Three-power supply automatic switching device
CN103795076A (en) * 2014-03-05 2014-05-14 贾继莹 Three-phase load automatic balancer and phase changing device thereof

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C14 Grant of patent or utility model
ASS Succession or assignment of patent right

Owner name: LONGKING ENVIRONMENTAL PROTECTION TECHNOLOGY (SHAN

Free format text: FORMER OWNER: SHANGHAI LONGKING ENVIRONMENTAL PROTECTION CO., LTD.

Effective date: 20150616

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20150616

Address after: 201106, Shanghai, Suide Road, Putuo District, No. 175, three, 3 north

Patentee after: Longjing Kejie environmental protection technology (Shanghai) Co., Ltd.

Address before: 201203. F building, No. 2500 East Dragon Road, Zhangjiang hi tech park, Shanghai

Patentee before: Shanghai Longking Environmental Protection Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20101124

CX01 Expiry of patent term