CN201185344Y

CN201185344Y - Electrical distribution busbar protective device

Info

Publication number: CN201185344Y
Application number: CNU2007201743350U
Authority: CN
Inventors: 韩利海; 徐贞华; 鄢榕青; 黎雪英
Original assignee: Jiangxi Copper Corp
Current assignee: Jiangxi Copper Corp
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2009-01-21
Anticipated expiration: 2017-12-28

Abstract

The utility model belongs to a power distribution protector which comprises a but inlet switch 1, a section II bus 2, a section II outlet switch 3, a bus connected switch 4, a section I bus 5, a section I outlet switch 6 and a programmable controller 7; all switches are provided with current sensors. The programmable controller 7 can judge the short-circuit section and switch failures according to the signal duration of the current sensors and sends the disconnecting control signal to the switch of the higher level, and is very reliable.

Description

A kind of distribution bus protective device

Technical field

The utility model belongs to a kind of controller switching equipment protective device, and is especially relevant with the protection of distribution line bus.

Background technology

In the power supply-distribution system of China; the automatic safety device of 6-35KV system generally prolongs uses the syllogic protective relaying device; load lines at different levels are passed by current protection and are adopted different definite values, and are equipped with reliability, sensitivity, selectivity and the quick-action of corresponding time As soon as possible Promising Policy protective device.Its weak point is that the busbar fault in power station itself is difficult to take quick safeguard measure, and destructiveness that its short circuit causes and influence surface are much bigger during than line short.

Summary of the invention

The purpose of this utility model provides the high distribution bus protective device of a kind of reliability.

The purpose of this utility model reaches like this: comprise by bus service entrance switch, II section bus, II section going out the dual pressure control switch system that the related switch of wiretap, bus, I section bus, I section outlet switch are formed, and Programmable Logic Controller, wherein, bus service entrance switch, II section go out the related switch of wiretap, bus, the I section goes out to be separately installed with current inductor in the wiretap; Programmable Logic Controller signal output part and signal input part go out wiretap, the related switch of bus, I section with bus service entrance switch, II section respectively and go out that wiretap is corresponding to link to each other.

From the above; bus service entrance switch, II section go out the current inductor that the related switch of wiretap, bus, I section go out in the wiretap induced signal are passed to programmable controller; can judge whether each switch segments has short-circuit conditions; after the short-circuit signal certain time; whether just can judge respective switch malfunctioning; perhaps short circuit occurs on the corresponding bus; in both cases; electric current on the bus is all very big; damage to bus is also very big; this moment, programmable controller just sent open command to the upper level quick closing valve, reached the purpose of protection bus.

Description of drawings

Fig. 1 is the utility model principle schematic.

Embodiment

Referring to Fig. 1, the utility model comprises that going out the related switch 4 of wiretap 3, bus, I section bus 5, I section by bus service entrance switch 1, II section bus 2, II section goes out the dual pressure control switch system that wiretap 6 is formed, and Programmable Logic Controller 7, wherein, bus service entrance switch 1, II section go out the related switch 4 of wiretap 3, bus, the I section goes out in the wiretap 6 to be separately installed with current inductor; Programmable Logic Controller 7 signal output parts and signal input part go out wiretap 3, the related switch 4 of bus, I section by holding wire 71,73,74,76 and bus service entrance switch 1, II section respectively and go out 6 corresponding linking to each other of wiretap.

During use, establish power supply and supply II section bus 2, through the related switch 4 band I section buses of bus 5, two buses load is arranged all again by bus service entrance switch 1.When 2 short circuits of II section bus, the current inductor in the bus service entrance switch 1 records short circuit current, and other current inductor does not measure short circuit current, and then Programmable Logic Controller 7 sends to instruct bus service entrance switch 1 is tripped rapidly.If the current inductor that the II section goes out in the wiretap 3 records short circuit current, then the current inductor in the bus service entrance switch 1 also records short circuit current, if programmable controller 7 received durations reach 0.25 second, it is malfunctioning that then decidable II section goes out wiretap 3, Programmable Logic Controller 7 sends the instruction that bus service entrance switch 1 disconnects, and reaches the purpose of protection II section bus 2; The time-delay that Programmable Logic Controller is set up can not tripped bus service entrance switch 1 immediately, and misoperation reduces, and the electricity consumption reliability of other section is strengthened, and has the advantage of stable performance.This shows, compare with original technology that the utility model has been realized switch control interlock function, reliability strengthens greatly, because the judgement of the time of Programmable Logic Controller 7 is more accurate, practicality of the present utility model is improved greatly again.

Claims

1, a kind of distribution bus protective device, comprise that going out the related switch (4) of wiretap (3), bus, I section bus (5), I section by bus service entrance switch (1), II section bus (2), II section goes out the dual pressure control switch system that wiretap (6) is formed, and Programmable Logic Controller (7), it is characterized in that: bus service entrance switch (1), II section go out the related switch (4) of wiretap (3), bus, the I section goes out in the wiretap (6) to be separately installed with current inductor; Programmable Logic Controller (7) signal output part and signal input part go out wiretap (3), the related switch of bus (4), I section by holding wire (71), (73), (74), (76) and bus service entrance switch (1), II section respectively and go out corresponding linking to each other of wiretap (6).