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  1. sertec

    50 vs. 60 Hz electro-mechanical 50/51 calibration

    I've noticed some electrical-mechanical overcurrent(50/51) relays labeled 50/60 Hz and others labeled 60 HZ. We have been requested to calibrate several relays for 50Hz operation. Is there a consideration for 50 vz 60 Hz calibration of the same relay? We are in a 60Hz country. Thank you.

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