Ashida electronics pvt. Ltd. One of the leading designers, developer & manufacturers of electrical power protection relays, scada systems & metal detector offers wide range of protection relays. These are dsp based `numerical` communicable/non-communicable non-directional oc/ef relays. These are available with number of protection functions such as lbb, trip circuit supervision ,di/do etc.
Adr245b is design to meet the demand of low and medium switchgear control. The adr245b is a directional 3 oc and 1 ef relay with instantaneous high set and programmable output to simplify feeder protection wiring. The adr245b continuously monitors all 3 phase and earth current,through ct connections. The high-speed micro-controller samples this current through a 12-bit a/d
Converter. The micro-controller performs powerful digital algorithms to find out amplitude of current signal, direction of power flow then this value is use for protection and metering function. All measurement is tuned to fundamental frequency. Each input current is also displayed on 20 x 4 lcd display for metering
