DOLD BD 5936.17 AC 50/60HZ 230V

The BD 5936 series safe master® Safety Relay for standstill monitoring of 3 and 1-phase asynchronous motors. It offers 2NO, 2NC contacts for 250VAC positively driven output contacts. The LED indicators are suitable for motor standstill, line breakage and operating voltage. At 2 terminals of the stator winding the BD 5936 measures the voltage of the slowing motor which has been induced by residual magnetism. If the induction voltage approaches 0 this indicates that the device is at a standstill and the output relay is activated. At the same time the monitor detects strand breaks between measurement inputs Z1/Z2 by means of a 6V direct current generated by the monitor. If a line breakage is detected, the output relay goes into the normal position (as when the motor is running). This state is saved and can only be cleared by (briefly) switching off the auxiliary voltage.