Description3-phase and neutral monitoring plug-in relay for separate upper and lower voltage control in S1721. Often used to control all 3 phases and neutral where the supplied electrical power is unstable or varies in value in order to monitor that the attached motors are performing as required. ...
SYY155: Description3-phase and neutral monitoring plug-in relay for separate upper and lower voltage control in S1721. Often used to control all 3 phases and neutral where the supplied electrical power is u...
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3-phase and neutral monitoring plug-in relay for separate upper and lower voltage control in S1721. Often used to control all 3 phases and neutral where the supplied electrical power is unstable or varies in value in order to monitor that the attached motors are performing as required. The S1721 features built-in time delay