CN203367780U

CN203367780U - Electrical closing blocking device

Info

Publication number: CN203367780U
Application number: CN 201320476611
Authority: CN
Inventors: 周清平; 陈岳
Original assignee: HNAC Technology Co Ltd
Current assignee: HNAC Technology Co Ltd
Priority date: 2013-08-06
Filing date: 2013-08-06
Publication date: 2013-12-25
Anticipated expiration: 2023-08-06

Abstract

The utility model discloses an electrical closing blocking device including a first power switch closing loop, a second power switch closing loop, and a connecting switch closing loop. A first breaker is serially connected in the first power switch closing loop, a second breaker is serially connected in the second power switch closing loop, a third breaker is serially connected in the connecting switch closing loop, the normally closed auxiliary contact of the third breaker is serially connected in the first power switch closing loop, the second power switch closing loop is serially connected with the normally closed auxiliary contact of the third breaker, and the connecting switch closing loop is serially connected with the normally opened and normally closed auxiliary contact of the first breaker and the normally opened and normally closed auxiliary contact of the second breaker. The electrical closing blocking device reduces the cabinet cross connection line of a first power cabinet and a second power cabinet and the contact wire end for mutually blocking in each cabinet only has five contacts, thereby greatly facilitating the wiring of the production and the wire laying and wiring of a on-site cable.

Description

A kind of electric closing locking device

Technical field

The utility model relates to the low-voltage distribution field, particularly a kind of electric closing locking device.

Background technology

The primary connection list mother partition mode of connection commonly used in low voltage power distribution network, in the electric closing locking electric power system of two inlet wire one buses, electric closing locking scheme mode is of a great variety, and the most frequently used electric closing locking mode principle is:

1, the normally closed auxiliary contact of circuit breaker in the normally closed auxiliary contact of circuit breaker, interconnection switch closing circuit in serial connection second source switch closing circuit in the first mains switch closing circuit;

2, the normally closed auxiliary contact of circuit breaker in the normally closed auxiliary contact, second source switch closing circuit of circuit breaker in serial connection the first mains switch closing circuit in the interconnection switch closing circuit;

3, be connected in series the normally closed auxiliary contact of circuit breaker in the normally closed auxiliary contact, interconnection switch closing circuit of circuit breaker in the first mains switch closing circuit at second source switch closing circuit;

There is following shortcoming in this electric closing locking mode:

1) this electric closing locking device connecting line is many, in each cabinet each other locking contact the end of a thread have more than 8 contacts;

2) this electric closing locking device, exists across the cabinet line when far away at two incoming power standoff distances, and locking cable line length and site operation wiring are also extremely inconvenient.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model provides a kind of simple in structure, production wiring and site operation electric closing locking device easily.

The technical scheme that the utility model addresses the above problem is: a kind of electric closing locking device, comprise the first mains switch closing circuit, second source switch closing circuit and interconnection switch closing circuit, be serially connected with the first circuit breaker in described the first mains switch closing circuit, second source switch closing circuit is serially connected with the second circuit breaker, the interconnection switch closing circuit is serially connected with the 3rd circuit breaker, also be serially connected with the normally closed auxiliary contact of the 3rd circuit breaker in described the first mains switch closing circuit, described second source switch closing circuit is serially connected with the normally closed auxiliary contact of the 3rd circuit breaker, described interconnection switch closing circuit is serially connected with the normally-open normally-close auxiliary contact of the first circuit breaker and the normally-open normally-close auxiliary contact of the second circuit breaker, wherein the normally closed auxiliary contact of the first circuit breaker is connected in series with the auxiliary contact of often opening of the second circuit breaker, be attempted by again the two ends of often driving auxiliary contact of normally closed auxiliary contact and second circuit breaker of described the first circuit breaker after often the driving auxiliary contact and the normally closed auxiliary contact of the second circuit breaker is connected in series of the first circuit breaker.

It is chain that described the first circuit breaker, the second circuit breaker, the 3rd circuit breaker are set to three lock two key mechanicals.

The beneficial effects of the utility model are:

1, the utility model reduced the first power cabinet and second source cabinet across the cabinet line;

2, in each cabinet each other locking contact the end of a thread only have 5 contacts, greatly facilitate the wiring of production and unwrapping wire and the wiring of site operation cable.

The accompanying drawing explanation

Fig. 1 is circuit theory schematic diagram of the present utility model.

The control principle drawing that Fig. 2 is the utility model circuit breaker.

In figure: 1FU, 2FU, 3FU, 4FU are fuse; 1QF is the first circuit breaker; 2QF is the second circuit breaker; 3QF is the 3rd circuit breaker; 3KA1 is auxiliary relay; 1SB1,2SB1,3SB1 are switch knob.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described.

As Fig. 1, shown in Fig. 2, the utility model comprises the first mains switch closing circuit, second source switch closing circuit and interconnection switch closing circuit, be serially connected with the first circuit breaker 1QF in described the first mains switch closing circuit, second source switch closing circuit is serially connected with the second circuit breaker 2QF, the interconnection switch closing circuit is serially connected with the 3rd circuit breaker 3QF, also be serially connected with the normally closed auxiliary contact of the 3rd circuit breaker 3QF in described the first mains switch closing circuit, described second source switch closing circuit is serially connected with the normally closed auxiliary contact of the 3rd circuit breaker 3QF, described interconnection switch closing circuit is serially connected with the normally-open normally-close auxiliary contact of the first circuit breaker 1QF and the normally-open normally-close auxiliary contact of the second circuit breaker 2QF, wherein the normally closed auxiliary contact of the first circuit breaker 1QF is connected in series with the auxiliary contact of often opening of the second circuit breaker 2QF, be attempted by again the two ends of often driving auxiliary contact of normally closed auxiliary contact and the second circuit breaker 2QF of described the first circuit breaker 1QF after often the driving auxiliary contact and the normally closed auxiliary contact of the second circuit breaker 2QF is connected in series of the first circuit breaker 1QF.

As shown in Figure 1: " L101, L102, L103 " and " L201, L202, L203 " power end has electricity, now closes the first circuit breaker 1QF and the second circuit breaker 2QF, and the 3rd circuit breaker 3QF disconnects; After the first circuit breaker 1QF or the second circuit breaker 2QF are due to dead electricity or fault trip, now should close the 3rd circuit breaker 3QF, now the first circuit breaker 1QF or the second circuit breaker 2QF are with two sections bus I and II to continue power supply; The first circuit breaker 1QF, the second circuit breaker 2QF, the 3rd circuit breaker 3QF are set to the chain and electrical interlock of three lock two key mechanicals.

As shown in Figure 2: when the 3rd circuit breaker 3QF separating brake, the first circuit breaker 1QF could pass through switch knob 1SB1 and close a floodgate; When the 3rd circuit breaker 3QF separating brake, the second circuit breaker 2QF could pass through switch knob 2SB1 and close a floodgate; When the first circuit breaker 1QF separating brake and the second circuit breaker 2QF close a floodgate or close a floodgate and during the second circuit breaker 2QF separating brake, the 3rd circuit breaker 3QF could pass through switch knob 3SB1 combined floodgate as the first circuit breaker 1QF.

Claims

1. an electric closing locking device, comprise the first mains switch closing circuit, second source switch closing circuit and interconnection switch closing circuit, be serially connected with the first circuit breaker in described the first mains switch closing circuit, second source switch closing circuit is serially connected with the second circuit breaker, the interconnection switch closing circuit is serially connected with the 3rd circuit breaker, it is characterized in that: the normally closed auxiliary contact that also is serially connected with the 3rd circuit breaker in described the first mains switch closing circuit, described second source switch closing circuit is serially connected with the normally closed auxiliary contact of the 3rd circuit breaker, described interconnection switch closing circuit is serially connected with the normally-open normally-close auxiliary contact of the first circuit breaker and the normally-open normally-close auxiliary contact of the second circuit breaker, wherein the normally closed auxiliary contact of the first circuit breaker is connected in series with the auxiliary contact of often opening of the second circuit breaker, be attempted by again the two ends of often driving auxiliary contact of normally closed auxiliary contact and second circuit breaker of described the first circuit breaker after often the driving auxiliary contact and the normally closed auxiliary contact of the second circuit breaker is connected in series of the first circuit breaker.

2. electric closing locking device as claimed in claim 1, it is characterized in that: it is chain that described the first circuit breaker, the second circuit breaker, the 3rd circuit breaker are set to three lock two key mechanicals.