The Use Of Peripheral Equipments - Veichi AC90 Manual

AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL

7.3 The use of peripheral equipments

Note：
Wiring breaker
①
To ensure wiring safe, protect power system and prevent malfunction impact other equipments working when
short-circuit happens, and protect while over-load, please do use wiring breaker between power supply and main
loop power input terminals R,S,T.
While choosing the breaker, the capacitance should be about 1.5-2 times of the rated output current of
the frequency inverter. Please compare the time characteristic of breaker and the characteristic of the
inverter protection (150% of the rated output current, one minute). Make sure there will be no skip.
Before main loop wiring, make sure to cut the breaker and electromagnetic contactor. Otherwise, there
is danger of electric shock.
Leakage current breaker
②
The frequency inverter outputs peak voltage high-speed switch square wave, so there is high frequency leakage current.
For earth protection to prevent electric shock and leakage current fire, please install leakage current breaker. Usually,
Chart 7-1: Peripheral equipments connetion fig
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BASIC OPERATION AND TRIAL RUN