Climate laboratory test three-phase inconsistent time relay automatic commutation device

Abstract

The invention provides a climate laboratory test three-phase inconsistent time relay automatic commutation device comprising a housing, the housing is provided with a power supply unit, a signal input unit, a signal switching output unit and an automatic commutation unit, and the signal input unit is connected with the automatic commutation unit; the signal input unit is connected with the signal switching output unit; the automatic commutation unit comprises four groups of switching signal relay modules, the four groups of switching signal relay modules are connected in parallel and then are connected with the signal input unit, and the four groups of switching signal relay modules can detect four groups of three-phase inconsistent time relays at the same time. According to the invention, the output direction of the input test signal is controlled through the automatic commutation unit, so that multiple tests are realized through one-time wiring, automatic switching of signal output is completed, the purpose of checking four groups of three-phase inconsistent time relays through one-time wiring test is realized, repeated manual commutation is avoided, the test equipment is frequently started and shut down, so that the repeated disassembly and assembly times of the test wiring are effectively reduced.

Description

technical field [0001] The invention relates to the field of automatic phase change of relays with three-phase inconsistencies, in particular to an automatic phase change device for time relays with three-phase inconsistencies tested in a climate laboratory. Background technique [0002] Power system faults are generally transient faults. Usually, at the moment of a fault, the relay protection device of the power system will act quickly to quickly remove the fault to ensure the safe and stable operation of the power system. However, the faults of the power system are various and unpredictable. In order to quickly supply power after the fault is quickly removed, the power system often only jumps out of the faulty phase, and the non-faulty phase remains in operation. After the fault is removed, the reclosing action of the relay protection makes the line run normally. But if a permanent fault occurs, the circuit breaker will trip immediately after reclosing. Since the circui...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an automatic phase change device for relays with three-phase inconsistencies tested in a climate laboratory to solve the problem that the existing device can only test one relay at a time

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