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Numerical Directional 3 O/C + 1E/F IDMT Relay |
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Product category : Relays
Ashida electronics pvt. Ltd. Designers, developer & constructors of electrical power protection relays & scada systems. The company has gained iso 9001:2000 certifications from m/s. Bvqi, u.K. Ashida electronics pvt. Ltd offers ashida numerical directional 3 o/c + 1e/f idmt relay adr145a has main three functions 1] protection 2] self-supervision 3] measurement. Ashida numerical directional 3 o/c + 1e/f idmt relay is designed to meet demand of low and medium switchgear control. The adr145a is a directional 3 oc and 1 ef relay with instantaneous high set and programmable output to simplify feeder protection wiring. The adr145a 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. All measurement is tuned to fundamental frequency. Each input current is also displayed on 16 x 2 lcd display for metering. The relay is having. The key features of the ashida numerical directional 3 o/c + 1e/f idmt relay are:
4 element [3 phase + ef] over current idmt with instant trip.
Programmable [non- volatile] setting by local keys as well as remote setting by communication port.
Back - lit lcd display for settings.
Display of fault current. / load current.
Selection of curve: five selectable curves,
Normal inverse1 [c1], normal inverse2, [c2]
Very inverse [c3], extremely inverse [c4], long time inverse [c5].
Design using dsp technology
Latching of fault current.
Direction oc/ef characteristic.
Programmable mta +30, +45and +60 for phase and - 14, -30, -45 for ef.
Pass-word protection for setting
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