Ah controls offers a three-phase voltage, current and frequency meter in 1/4 din cabinet [96 x 96 mm size] with independent display for each parameter. The vaf meter has bright seven segment led display for clear day light viewing, it has built-in three phase transducer for voltage and current, fild programmable ct ratio which is stored in non-volatile memory. It indicates voltage in the following sequence ry, yb, br, rn, yn, bn and current in r, y, b, by scroll key. The specifications of the meter are: auxiliary supply 110v model [85 - 130 v ac], 230v model [180 - 270v ac]; burden of >0.2 va on each voltage, current and frequency signal. >3.0 va on auxiliary supply; input range for voltage - 0-500 v ac, current 0.25-6.0 a, frequency 30-100 hz, and resolution is 1 count for voltage, 0.01 count for frequency, 0.1 count for ct ratio <100/5a, 1 count for ct ratio from 100/5 a-1000/5 a and 0.01 ka for ct ratio > 1000/5 a; accuracy class 2 for voltage and current, 0.1% of the range for frequency; operating ambient - 0-60ºc, rh <95% non condensing; and weight - 500 g [approximately].
