Protection set

Main features

• three phase measuring circuit
• possibility to work in one, two or three phase protection systems
• measuring and continous diplaying of energising value
• record of value of current during last disturbance
• binary input to block relay operation
• LED display and set of buttons in order to operation of the relay
• optical indicating (with LED diodes) of pick-ups and trips, external blocking signal, measuring circuits continuity and proper operation of relay
• Relay output for pick-up signalling purpose (K1) and trip (K2, K3), watchdog or lack of aux. voltage purpose (K4) or blocked mode signalling (K5)
• self-test of proper operation of relay
• relay enclosure gives possibility to mount on 35 mm rail, surface mount or flush mount

RIT-430A controls the RMS values of measuring currents, selects the maximum value and compares it with setting value of current, which is set by user. If one of measured values exceeds the setting value, the relay pick-ups and after set time-delay, the trip signal is generated. Operation of relay is blocked when blocking input (Ubl) is energised.

TECHNICAL DATA