Protection set

Main features

• three or four measuring inputs
• measuring of current electrical values
• real time clock
• event recorder of 33 or 52 unique events witch capability of 300 records
• parameters of last disturbance recorder, sum of tripped currents counter
• binary inputs for external protection with possibility to block particular protection functions or auto-reclose function
• generating of trip signal
• LCD display and buttons set in order to operation of relay
• optical indicating (with LED diodes) of relay operation statuses
• 5 programmable relay outputs (S1-S5)
• Relay output for signalling power supply module failure or lack of auxilliary voltage
• RS-485 port for remote control with MODBUS protocol (optional)
• self test of proper operation of relay
• relay enclosure gives possibility to mount on 35 mm rail, surface mount or flush mount

The energising values of RITz-421 relay are currents (IL1, IL2, IL3, and I₀) and residual voltage U₀ (optional). If any of measured values exceeds setting value (set by user), the relay operates in a manner dependind on configuration. With optional communication interface, the measured currents, binary inputs or outputs, register logs are provided. The PC software provided with relay allows to set the relay, confirm generated signals, graphical display of measured values and browse the register records.

TECHNICAL DATA