Sci-tech Three phase Under-Over Current Protection Relays Model ELTR 001A are protection relays particularly suitable for average complexity educational study purposes.
Each phase has its individual indicator, two alarm LEDs, each associated to one exchange contact and four push bottons to program the working parameters of the relay. The contacts can be freely associated to minimum or maximum thresholds. Default parameters are set at the plant and are recorded on the Instruction/experiment manual.
On the front panel there are 4 mm connectors for powering the instruments, a power on switch, current inputs/outputs and two exchange contacts for each phase, one for minimum and one for maximum, that are operated when the respective thresholds are exceeded.
Along with ‘Sci-tech Over-under Voltage protection relays’ & ‘Earth protection relays’ the system forms a comprehensive protection system.
Power Supply: 230V AC, 50Hz, 5VA
Max. Current: 10A
Contacts rating: 10A – 250V AC
Alarm Setting: Min / Max / Off
On/Off Relay: 0.1 – 9.9s
Hysteresis: 0 ÷ 100%