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3.
Product overview
3.1.
Use of the relay
The voltage relay REU 610 is a versatile multifunction protection relay mainly
designed for overvoltage and undervoltage protection and for supervision of
medium voltage distribution networks. The relay can also be used for protecting
generators, motors and transformers.
The relay is based on a microprocessor environment. A self-supervision system
continuously monitors the operation of the relay.
The HMI includes a liquid crystal display (LCD) which makes the local use of the
relay safe and easy.
Local control of the relay via serial communication can be carried out with a
computer connected to the front communication port. Remote control can be carried
out via the rear connector connected to the control and monitoring system through
the serial communication bus.
3.2.
Features
*
Overvoltage protection with definite-time or IDMT characteristic, low-set stage
*
Overvoltage protection with definite-time or IDMT characteristic, high-set stage
*
Based on phase-to-phase voltage measurement or negative phase-sequence
(NPS) voltage
*
Undervoltage protection with definite-time or IDMT characteristic, low-set stage
*
Can also be used as alarm stage
*
Undervoltage protection with definite-time or IDMT characteristic, high-set
stage
*
Based on phase-to-phase voltage measurement or positive phase-sequence
(PPS) voltage
*
Residual overvoltage protection with definite-time characteristic, low-set stage
*
Residual overvoltage protection with definite-time characteristic, high-set stage
*
Circuit-breaker failure protection
*
Trip counters for circuit-breaker condition monitoring
*
Trip-circuit supervision with possibility to route the warning signal to a signal
output
*
Trip lockout function
*
Four accurate voltage inputs
*
User-selectable rated voltage 100/110/115/120 V
*
User-selectable rated frequency 50/60 Hz
*
Three normally open power output contacts
*
Two change-over signal output contacts and three additional change-over signal
output contacts on the optional I/O module
*
Output contact functions freely configurable for wanted operation
Voltage Protection Relay
Operator's Manual
REU 610
REU 610
1MRS755770
