相电压保护继电器

INTRODUCTION

• Sequence/under voltage/over voltage/asymmetric voltage protection relays to continuously monitor AC power supplies in the 3φ4W system.
• Output relay will operate to ON (terminal 15 & terminal 18 close) when power is applied to the unit normally, and simultaneously detect if supplied power voltage are within the set voltage range, and phase in correct sequence.
• 5% to 20% Knob-adjustable separately for over voltage and under voltage.5% to 15% Knob-adjustable for asymmetric voltage .If voltage is over or under than the setting voltage for over 3 seconds, or asymmetic voltage is over the setting value for over 3 seconds, then the output relay will be released to its original position(terminal 15 & terminal 16 close).