Product overview
3.1 Purpose of the relay
The relay is based on a microprocessor environment. A self-monitoring system continuously monitors the operation of the relay.
The human-machine interface includes a liquid crystal display (LCD) that makes local use of the relay safe and easy.
The relays can be controlled locally via serial communications from a computer connected to the front communication port.
Remote control is available through a serial communications bus connected to the rear connector of the control and monitoring system.
3.2. Features
* Three-phase non-directional overcurrent protection with timing or IDMT characteristics and low rectification phase.
* Three-phase non-directional overcurrent protection, high rectification phase
* Three-phase non-directional overcurrent protection, instantaneous stage
* Non-directional ground fault protection with timing or IDMT characteristics, low setting stage
* Non-directional ground-fault protection, high-calibration phase.
* Phase discontinuity protection
* Three-phase cable thermal overload protection
* Arc protection
* Two lens sensors for arc detection (optional)
* Automatic adjustment of reference level according to backlight intensity
* Arc detection by remote light signal
* Automatic reclosing 1…. .3 times
* Circuit breaker fault protection
* Trip counter for circuit breaker status monitoring
* Trip circuit monitoring with routing of warning signals to signal outputs
* Trip lockout function
* Four accurate current inputs
* User selectable rated frequency 50/60 Hz
* Three normally open power output contacts
* Two change-over signaling output contacts and three additional change-over signaling output contacts on optional I/O module
* Output contact functions can be freely configured according to requirements.
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