Protection set

Main features

• One phase measuring circuit
• Two definite-time overcurrent stages
• Measuring and continuous displaying of energising value
• Record of value of voltage during last disturbance
• Binary input in order block relay operation
• LED display and set of buttons in order to operation of the relay
• Optical indicating (with LED diodes) current voltage value (U<U1, U1<U<U2, U>U2), external blocking signal and proper operation of relay
• Relay output for signalling: pick-up of I or II stage (K1), operation of I stage (K2), operation of II stage (K3), failure or lack of aux. voltage (K4) or relay interlock by external signal (K5)
• Self-test of proper operation of relay
• Relay enclosure gives possibility to mount on 35 mm rail, surface mount or flush mount

The RIT-400A relay measures the value of current and compares it to the threshold value set by the user. If the measured value exceed one of the threshold values, the relay operates according to selected operation mode. Possible operation modes are: overcurrent or overcurrent with interlock. The interlocked operation mode depends on binary signal fed to binary input (U_bl).

TECHNICAL DATA