CN201234136Y

CN201234136Y - Dual power source electricity supply system

Info

Publication number: CN201234136Y
Application number: CNU2008201132027U
Authority: CN
Inventors: 陆秋明
Original assignee: KAIDA ELECTRICAL INSTRUMENTS CO Ltd SUZHOU
Current assignee: KAIDA ELECTRICAL INSTRUMENTS CO Ltd SUZHOU
Priority date: 2008-07-16
Filing date: 2008-07-16
Publication date: 2009-05-06
Anticipated expiration: 2018-07-16

Abstract

The utility model relates to a dual-power supply system, which comprises two power supplies, buses respectively electrically connected with each power supply, main transformer breakers electrically connected between the corresponding power supply and the bus, and a bus tie breaker electrically connected between two buses. When one of the main transformer breakers is tripped, the bus tie breaker is closed to achieve persistent power supply from the system to loads on each bus, thereby ensuring normal operation of the loads on the buses of the main transformer breaker with faults, and ensuring smooth production and life.

Description

Dual power supply system

Technical field

The utility model relates to a kind of dual power supply system.

Background technology

Electric power system is carried out the electricity conveying by power cabinet usually at present; it comprises the inlet wire power supply; the bus that is electrically connected with power supply; usually a plurality of loads distribute on the bus; power supply by bus to each electric; between power supply and bus, also be electrically connected with the main transformer circuit breaker; the main transformer circuit breaker has combined floodgate; separating brake; operating states such as dropout; it is used to protect load on the bus; when the main transformer circuit breaker breaks down and threads off; power supply will stop the power supply to load; therefore single power cabinet power supply can not guarantee continuous power supply, thereby to producing; life exerts an influence.

The utility model content

The utility model purpose just provides a kind of dual power supply system that guarantees continued power.

In order to reach the foregoing invention purpose, the technical solution of the utility model is: a kind of dual power supply system, it comprises the two-way power supply power supply, the bus that is electrically connected with described each power supply respectively, be connected electrically in the main transformer circuit breaker between corresponding power supply and the bus, described each circuit breaker has separating brake, close a floodgate, three service positions of threading off, described each power supply is by the electric of combined floodgate on respective bus bars of corresponding main transformer circuit breaker, this system also comprises the bus that is connected electrically between described two sections buses, when described wherein one road main transformer circuit breaker tripping, the load continued power of realization system on each bus thereby described bus closes a floodgate.

Because the utilization of technique scheme, the utility model compared with prior art has following advantage: owing to also be electrically connected bus between the bus of two power supplies, like this when wherein a main transformer circuit breaker breaks down, bus is with combined floodgate work, thereby the load on the main transformer circuit breaker bus that guarantees to break down still can get electric work, and that guarantees to produce, live carries out smoothly.

Description of drawings

Accompanying drawing 1 is the utility model electricity principle schematic;

Accompanying drawing 2 is the utility model 1# power supply master cabinet circuit theory diagrams;

Accompanying drawing 3 is the female connection of the utility model cabinet circuit theory diagrams;

Accompanying drawing 4 is the utility model 2# power supply master cabinet circuit theory diagrams;

Wherein: 1, power supply; 2, main transformer circuit breaker; 3, bus; 4, bus.

Embodiment

Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:

Dual power supply system as shown in Figure 1, comprise two-way power supply power supply 1, bus 3, be connected electrically in the main transformer circuit breaker 2 between corresponding power supply 1 and the bus 3, bus 3 is connected with a plurality of electric loadings of using, between two-way bus 3, also be electrically connected with bus 4, above-mentioned main transformer circuit breaker 2 and bus 4 adopt the two key lockings of three locks, each circuit breaker has combined floodgate, separating brake, three service positions of dropout, therefore, the utility model dual power supply system has following several running status, physical circuit figure reference as 2 to Fig. 4:

First kind of running status is that described two main transformer circuit breakers 2 close a floodgate, bus 4 lockings: i.e. this moment, the main transformer circuit breaker 1QF of 1# power supply master cabinet closes a floodgate, and it is often driven auxiliary contact and closes, auxiliary auxiliary relay 1KA1 coil electricity adhesive, auxiliary auxiliary relay 1KA1 normally-closed contact is separately; Equally, the main transformer circuit breaker 2QF of 2# power supply master cabinet closes a floodgate, and it is often driven auxiliary contact and closes, auxiliary auxiliary relay 2KA1 coil electricity adhesive, and auxiliary auxiliary relay 2KA1 normally-closed contact is separately; Because auxiliary auxiliary relay 1KA1,2KA1 normally-closed contact all separate, bus 3QF closing coil XF can't switch on, and promptly bus can't be closed a floodgate by locking, and under the situation, load is powered by the power supply on the corresponding bus hereinto.

Second kind of running status is one of them combined floodgate in the two main transformer circuit breakers, bus closes a floodgate, when cutting off the power supply as main transformer when 2# power supply master cabinet, the under-voltage coil MN arrow pressure-off of 2# main transformer circuit breaker 2QF is buckled, circuit breaker 2QF tripping operation, it often drives auxiliary contact separately, and auxiliary auxiliary relay 2KA1 coil blackout separates, normally-closed contact closes; Voltage relay 2KV1, the 2KV2 coil blackout separates, normally opened contact separately, voltage auxiliary relay 2KA4 coil blackout separates, normally-closed contact closes, because auxiliary auxiliary relay 2KA1, voltage auxiliary relay 2KA4 normally-closed contact closes, the adhesive of time relay KT coil electricity, time relay KT time-delay normally opened contact closes, the bus closing coil XF combined floodgate of switching at this moment, bus closes a floodgate, then it is often driven auxiliary contact and closes, auxiliary auxiliary relay 3KA2 coil electricity adhesive, the 3KA2 normally-closed contact separately, 2# power supply main transformer circuit breaker 2QF closing circuit separately, closing coil XF combined floodgates of can't switching on, promptly 2# main transformer circuit breaker 2QF can't be closed a floodgate by locking at this moment, so pass through the 1# power supply electric on two sections buses respectively, guarantee the continuity of power supply.

If the outage of 1# power supply main transformer, then 2# main transformer breaker closing, bus close a floodgate, thereby realize the 2# power supply electric on two sections buses respectively, and its principle is identical with above-mentioned situation, does not repeat them here.

Claims

1, a kind of dual power supply system, it comprises two-way power supply power supply (1), the bus (3) that is electrically connected with described each power supply (1) respectively, be connected electrically in the main transformer circuit breaker (2) between corresponding power supply (1) and the bus (3), described each circuit breaker has separating brake, close a floodgate, three service positions of threading off, described each power supply (1) is by the electric of combined floodgate on respective bus bars (3) of corresponding main transformer circuit breaker (2), it is characterized in that: this system also comprises the bus (4) that is connected electrically between described two sections buses (3), when described wherein one road main transformer circuit breaker (2) is threaded off, described bus (4) thus close a floodgate the load continued power of realization system on each bus.