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AIR CIRCUIT BREAKERS - Electrical and Electronics Division

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TECHNICAL DATA<br />

TRANS�ORMER PROTECTION RELAY, CAPACITOR BANK PROTECTION RELAY<br />

Percentage Biased Transformer Differential Relay<br />

3 Phase Thermal + Over Current + Earth �ault Relay for transformer protection<br />

✦ Display of various parameters, trip count & trip data on 8 digit alphanumeric display.<br />

✦ Separate LEDs for various fault indication.<br />

✦ �our user programmable output relays.<br />

✦ Built in self supervision & self testing feature help maintenance.<br />

✦ Easy operation by 5 push buttons.<br />

✦ RS 485 port for serial communication with “MSCOM” User friendly software.<br />

Model MD32T IM30T DIN30C<br />

Description Transformer Differential + 3 Ph O/C, E/� + Thermal 3 Ph O/C, E/�<br />

Restricted E/� �or capacitor banks<br />

Device Code 87 RYB, 87N 50/51 RYBN, 49, 46, I 2 t 51/51 RYBN, 46, 37 Io<br />

Design Numeric Numeric Numeric<br />

�unctions Available Lowset Differential Lowset O/C O/C - 0.1 - 10 ln<br />

Lowset Op time :

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