ABB RELION REF615R Technical Manual page 363

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Table of Contents

1MRS240050-IB C

Technical Manual

A071114 V3 EN

Trip Curves for a typical 12 kV, 630 A, 16 kA vacuum interrupter

the number of closing-opening operations allowed for the circuit breaker

the current at the time of tripping of the circuit breaker

Calculation of Directional Coef

The directional coefficient is calculated according to the formula:

Supervision functions