Phase Sequence Monitor / Phase Failure:

• Installing the Electro 11 pin plug-in series of control and timing devices is simple and straightforward since they are designed to fit into a conventional 11 pin base.
• Phase failure, phase reversal, and phase imbalance are detected by the SF1 by monitoring the negative phase sequence (NPS) voltage.
• The unit's NPS voltage is set at 7%.
• The unit will de-energize if any of these malfunctions take place.
• Re-energizing the relay is contingent upon the supply voltage self-correcting.
• If there is a balanced voltage variation, the unit won't respond.