CN105842619A - 252kV tank type alternating current SF6 circuit breaker inspection method - Google Patents

Abstract

The invention discloses a 252kV tank type alternating current SF6 circuit breaker inspection method. The method includes the following steps that: a circuit breaker is connected into a current value-set circuit of which the voltage is 252KV and of which the frequency is 50Hz, the electrical parameters of the circuit breaker are inspected; the circuit breaker is arranged in an environment where the temperature of surrounding air does not exceed 40 DEG C, and the temperature rise of the circuit breaker is inspected; in a set time, the value of current passing through the circuit breaker under a switched-on state is made to be 40KA, so that the withstand current of the circuit breaker in the set time can be inspected, wherein the set time is 3s; rated peak withstand current inspection is carried out, namely, the current peak of the first large half wave of rated short-time withstand current which can be withstood by the circuit breaker under a switched-on state is inspected, wherein the current peak is not greater than 125KA; and current passing through the circuit breaker is made to be 40KA, so that the short-circuiting condition of the circuit breaker can be detected, the spring operation device of the circuit breaker is inspected, and after switching-on operation is completed, energy re-storage is performed on a switching-on spring, which can be completed in 15s to 20s. The 252kV tank type alternating-current SF6 circuit breaker inspection method is advantageous in that the method can decrease the failure rate of equipment.

Description

252kV The pot type exchange SF6 chopper method of inspection

Technical field

The present invention relates to field of electrical equipment, in particular it relates to a kind of 252kV pot type exchange SF6 chopper method of inspection.

Background technology

At present, the scheduled overhaul system that in power system, power equipment uses mostly also exists major defect, and as frequent in provisional maintenance, maintenance deficiency or maintenance surplus, blindly maintenance etc., this makes countries in the world costly in terms of maintenance of equipment every year.And for a long time, China's power system performs periodic inspection system to power equipment, to equipment Inspection and maintenance, thus there is the drawback that maintenance is excessively not enough with maintenance in the most planned time cycle.Because of fault at power train unification, often cause large-area power failure.And there is the problem that fault rate is higher in existing power equipment.

Summary of the invention

It is an object of the invention to, for the problems referred to above, propose a kind of 252kV pot type exchange SF6 chopper method of inspection, to realize the advantage reducing equipment failure rate.

For achieving the above object, the technical solution used in the present invention is:

A kind of 252kV pot type exchange SF6 chopper method of inspection, including,

Step 1, chopper is connected to voltage be 252KV, frequency be 50Hz and set current value circuit in, the electric parameter of chopper is tested；

Step 2, chopper putting into surrounding air less than in the environment of 40 DEG C, the temperature rise to chopper is tested；

Step 3, set time in, making by the current value of chopper under "on" position is 40KA, thus checks the tolerance electric current within the setting time of chopper, and the time that sets is as 3s；

Step 5, Rated peak withstand current are checked, i.e. the current peak of first major loop of the specified KA Rms of enough carryings under inspection breaker closing state, and the current peak of first major loop is not more than 125KA；

Step 6, make by the electric current of chopper to be 40kA, thus the short-circuit conditions of chopper is detected；

Step 7, spring operation means to chopper are tested, and after closing operation completes, to switching-in spring again energy storage, need to complete in 15 to 20 seconds.

Preferably, described step 1 sets current value as 2500A, 3150A, 4000A or 5000A.Technical scheme, by testing 252kV pot type exchange SF6 chopper, reduces the purpose of equipment failure rate.

Detailed description of the invention

A kind of 252kV pot type exchange SF6 chopper method of inspection, including,

Step 1, chopper is connected to voltage be 252KV, frequency be 50Hz and set current value circuit in, the electric parameter of chopper is tested；

Step 2, chopper putting into surrounding air less than in the environment of 40 DEG C, the temperature rise to chopper is tested；

Step 3, set time in, making by the current value of chopper under "on" position is 40KA, thus checks the tolerance electric current within the setting time of chopper, and the time that sets is as 3s；

Step 5, Rated peak withstand current are checked, i.e. the current peak of first major loop of the specified KA Rms of enough carryings under inspection breaker closing state, and the current peak of first major loop is not more than 125KA；

Step 6, make by the electric current of chopper to be 40kA, thus the short-circuit conditions of chopper is detected；

Step 7, spring operation means to chopper are tested, and after closing operation completes, to switching-in spring again energy storage, need to complete in 15 to 20 seconds.

Preferably, step 1 sets current value as 2500A, 3150A, 4000A or 5000A.Also including detecting between the conjunction timesharing to chopper, be not more than 60ms between the conjunction timesharing of chopper, preferred scheme is not more than 50ms for closing between timesharing.

Last it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (2)

1. a 252kV pot type exchange SF6 chopper method of inspection, it is characterised in that include,

Step 1, chopper is connected to voltage be 252KV, frequency be 50Hz and set current value circuit in, the electric parameter of chopper is tested；

Step 2, chopper putting into surrounding air less than in the environment of 40 DEG C, the temperature rise to chopper is tested；

Step 3, set time in, making by the current value of chopper under "on" position is 40KA, thus checks the tolerance electric current within the setting time of chopper, and the time that sets is as 3s；

Step 5, Rated peak withstand current are checked, i.e. the current peak of first major loop of the specified KA Rms of enough carryings under inspection breaker closing state, and the current peak of first major loop is not more than 125KA；

Step 6, make by the electric current of chopper to be 40kA, thus the short-circuit conditions of chopper is detected；

Step 7, spring operation means to chopper are tested, and after closing operation completes, to switching-in spring again energy storage, need to complete in 15 to 20 seconds.

The 252kV pot type the most according to claim 1 exchange SF6 chopper method of inspection, it is characterised in that set current value in described step 1 as 2500A, 3150A, 4000A or 5000A.