7SR45 Self Powered Overcurrent Protection Relay
The 7SR45 numeric relay provides both definite time and inverse time overcurrent and earth fault protection functions. The relay is designed to ensure sensitivity with a minimum operate setting of 0.2 x In for Phase Overcurrent Protection.The compact non draw-out design provides front fascia navigation keys, LCD and front USB port for ease of use. The relay is powered by the current transformers and does not require connection to an auxillary supply. Configuration can be done from the fascia or via the free of charge Reydisp Evolution PC Software.
FEATURES
User selectable hardware configuration to suit different bank arrangements
*3 pole overcurrent + 1 pole unbalance
* 1 pole overcurrent + 3 pole unbalance
Optional voltage inputs
Re-energisation blocking to prevent CB closing until bank has self discharged
Overvoltage protection by integration analysis of current
Suitable for use with both internally/externally fused and fuseless capacitors
User programmable characteristics for all inverse voltage, current and thermal curves
Unbalance protection with natural spill compensation
User selectable hardware configuration to suit different bank arrangements
*3 pole overcurrent + 1 pole unbalance
* 1 pole overcurrent + 3 pole unbalance
Optional voltage inputs
Re-energisation blocking to prevent CB closing until bank has self discharged
Overvoltage protection by integration analysis of current
Suitable for use with both internally/externally fused and fuseless capacitors
User programmable characteristics for all inverse voltage, current and thermal curves
Unbalance protection with natural spill compensation