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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

What is the definition of ANSI 25 - Synchro-check?

This function checks the voltages upstream and downstream of a circuit breaker and
allows closing when the differences in amplitude, frequency and phase are within authorized limits.

Characteristics

adjustable and independent set points for differences in voltage, frequency and phase
adjustable lead time to take into account the circuit-breaker closing time
5 possible operating modes to take no-voltage conditions into account.