369-HI-R-M-F-E-H-E 369 motor protection relay

The function of 369-HI-R-M-F-E-H-E: A, overcurrent protection –369-HI-R-M-F-E-H-E is in accordance with the maximum load current that may appear in the protected equipment or line to set. Such as large motor starting current (short time) and traversing short circuit current of non-fault current, to ensure the normal operation of equipment and lines. In order to make the upper and lower overcurrent protection selective, a corresponding step difference is set in the time limit
B, current rate break protection –369-HI-R-M-F-E-H-E is in accordance with the protected equipment or the line is not the end of the maximum short circuit current or the transformer secondary side of the three-phase short circuit current and set. Quick break protection action, theoretically current current break protection has no time limit. That is to cut off the circuit breaker with zero seconds or less time limit action.

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