A device for online testing of circuit breaker protection characteristics
A technology for online testing and protection characteristics, applied in circuit breaker testing, instruments, electric controllers, etc., can solve the problems of lack of power factor compensation, limited accuracy and efficiency of circuit breaker testing, and large device size, etc., to improve input and output performance, reduce invalid control rules, and improve the effect of power factor level
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[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.
[0030] like figure 1 As shown, in the embodiment of the present invention, an on-line testing device for circuit breaker protection characteristics is provided, including a front-stage subsystem 1 and a back-stage subsystem 2; the front-stage subsystem 1 is composed of an AC power supply U, a rectifier bridge ( It consists of diodes VD1~VD4), high-frequency filter capacitor C1 and boost chopper DC converter (consisting of inductor L1, triode VT 0 , diode VD5 and a voltage divider circuit formed by resistors R1 and R2), and the rear-stage subsystem 2 is composed of a full-bridge inverter circuit (by a triode VT). 1 ~VT 4 composition), filter circuit (composed of inductor L2 and filter capacitor C3), current booster T and load R; among them, it also includes a ...
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