The ZUE150-U2 is an automatic-restart relay manufactured by the German company Bender; its official order number is typically B 936 152. This device is primarily used in industrial automation and power systems to provide undervoltage protection and control the automatic system restart following voltage recovery.
Core Technical Parameters
• Rated system voltage (Un): AC 50 Hz 220 V
• Order No. / Item No.: B 936 152
• Operating range: 0.65…1.15 Un
• Operating threshold: The limit values for voltage drop or recovery are set to 65% and 80% of the nominal voltage respectively.
• Contact capacity: AC 250 V / 5 A
• Adjustable delay range: t = 0.1…100 s (adjustable via stored energy time tAB and start delay tAN)
• Power consumption: Approx. 4.0 VA
Special Functions with Option U2
Compared with the basic ZUE150, models with suffix U2 have the following exclusive electrical features:
• Terminals U31 and U32: These terminals can be connected to an external normally open (N/O) "STOP" button.
• Disconnection mechanism: When the system is powered off or no system voltage is present, disconnection can still be realized by this design to prevent accidental or automatic system restart.
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