Protection set

Main features

• three possible modes of fault detecting: overcurrent, overcurrent with voltage restrain, directional overcurrent, settable undependent for each stage
• definite-time charateristic with one or two settable time delays or inverse time characteristic
• measurment of current electrical values (current, voltage, phase shift of current and voltage)
• event recorder: 20 unique events with capability of 300 events, time resolution 1 ms
• parameters of last disturbance recorder
• 2 binary inputs in order to block protection pick-up or auto-reclose function
• 5 programmable relay outputs (S1-S5)
• optical indicating (with LED diodes) of relay operation statuses
• watchdog contact
• test of relay outputs option
• self test of proper operation of relay
• real time clock
• communication RS-485 port for connectrion with PC computer or SCADA system (optional)
• relay enclosure gives possibility to mount on 35 mm rail, surface mount or flush mount

Energising values of RioK-442 protection relay are zero-sequence component of currents (3Io) and zero-sequence component of voltages (3Uo). The relay reacts if any of measured values exceeds the threshold value set by the user. Communication interface provides measured and calculated electrical values, binary inputs and outputs states and saved records. The manufacturer provides PC software allowing to set the relay, confirm signals, graphical display of measured values and browse records.

TECHNICAL DATA