Intelligent frame breaker overload instant test-bed and control method

Abstract

The invention relates to an intelligent frame breaker overload instant test-bed and a control method. The test-bed comprises an industrial control computer, an industrial touch display screen, and a stabilized power source; the industrial touch display screen is connected with the industrial control computer through a matched cable; the stabilized power source comprises a switch power source connected between 220 V power sources in parallel; an output port of the industrial control computer is connected to a signal processing unit and connect with a relay control circuit, a contactor control circuit, a motor control circuit and three automatic stabilized current circuits. For controlling a conduction time of a voltage-regulating motor, a transformer firstly computes voltage according to current required by a current acquiring signal, then computes the conduction time of the motor; three phases are repeatedly regulated to achieve the current-stabilization effect; furthermore, a testingcircuit is in starlike jointing method, other two phases can be influenced when any one phase current is adjusted; in addition, the testing circuit can act while feeding back a signal, thereby improving a current-stabilization speed; the current-stabilization time is within 2 seconds and the current-stabilization precision is high.

Description

technical field [0001] The invention belongs to an intelligent frame circuit breaker test equipment, in particular to an intelligent frame circuit breaker overload instantaneous test bench and a control method. Background technique [0002] Low-voltage electrical appliances are the basic components of the machinery industry, and the performance and quality of their products directly affect the reliable operation of power systems and industrial control systems. According to national standards and IEC standards, low-voltage circuit breakers must undergo tests including overload long-delay tripping characteristics before leaving the factory. The main technical parameters of the circuit breaker tripping characteristic test bench on the market include: three-phase voltage regulation technology; the three-phase steady current adopts the connection method of angular input and star output, and the three phases are involved with each other, and one phase has a greater influence. Lar...

AI Technical Summary

Problems solved by technology

The main technical parameters of the circuit breaker tripping characteristic test bench on the market include: three-phase voltage regulation technology; the three-phase steady current adopts the connection method of angular input and star output, and the three phases are involved with each other, and one phase has more influence. Large, the other two phases have small movements, resulting in inaccurate steady current. The artificial three-phase steady current used in the three-phase steady current, because the artificial need to repeatedly adjust the three-phase current to achieve the current required for the test, so it takes a long time to adjust a current range. Long, it takes about a few minutes to ten minutes, and the accuracy is not higher than 3%

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