Over-current protection relay P50 Agile P154

panel-mountdigitalprogrammable

The P154 is a four element (phase A, B, C, N) non-directional overcurrent and earth fault relay with its functions designed to cover a wide range of applications in the protection of cables and overhead lines deployed in industrial installations, public distribution networks, and other substations. The P154 is an economical choice, designed for deployment in volume, in lower voltage systems, in industrial installations, distribution network substations and as a backup relay in HV systems. P154 can also be applied for direct refurbishment of substations using older generations of non-communicating overcurrent relays. The principal protection functions in the relay are timed and instantaneous phase and earth fault protection, with up to 3 independent stages available. IEC and IEEE curve types are provided for IDMT functions. Additional versatility is provided thanks to the inclusion of negative sequence overcurrent, thermal overload, cold load pickup, inrush blocking, broken conductor, breaker fail, restricted earth fault, undercurrent/loss of load, and trip circuit supervision functions. Multiple setting groups are included. The hardware capability is broadened by a sensitive earth fault CT option, and a universal auxiliary power supply range to permit standardisation in procurement and inventories.