Ashida electronics pvt. Ltd. Designers, developer & manufacturers of electrical power protection relays & scada systems. The company has obtained iso 9001:2000 certifications from m/s. Bvqi, u.K. Ashida electronics pvt. Ltd offers ashida numerical single pole oc/ef protection relay design adr111a available to meet demand of low and medium switchgear control. The adr111a is single pole oc/ef relay with instantaneous high set and programmable output to simplify feeder protection wiring. The adr111a continuously monitors earth current, through ct connections. The high-speed micro-controller samples this current through a 12-bit a/d converter. Each input current is also displayed on 16 x 2 lcd display for metering. The relay is having main three functions 1] protection 2] self- supervision 3] measurement. The key features of the ashida numerical single pole oc/ef protection relay design are: