Voltage Relays  
Detection of over voltages and under voltages in single phase AC and DC, and three phase AC systems up to 690V. Bender voltage relays cover a wide variety of systems to be monitored and incorporate, depending on application and type, easily accessible potentiometers for adjustable alarm set points. These are: Over voltage, under voltage, time delay and hysteresis. 
Please refer to the table below to determine which voltage relay is suited for your application. 
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Left mouse click on type (table) or flag symbol for datasheet in pdf. format



      voltage relays, over voltage, overvoltage, under voltage undervoltage
     
      

     

     

  

 





 

BENDER System Adjustable Hz range Adjust. Adjust. Article #
Type Voltage Un Voltage range   Time  Hyst.  

Under- and Over voltage relay 1Ph AC /DC

     
SUA143 AC/DC 24V UC 10-30 40-400 120msec 3% B932802
SUA143 AC/DC 42V UC 20-60 40-400 120msec  3% B932803
SUA143 AC/DC110V UC 50-150 40-400 120msec  3% B932801
SUA143 AC/DC 230V UC 120-300 40-400 120msec  3% B932800
           

Under- and Over voltage relay 1Ph AC /DC

     
SUA145 AC/DC 24V UC 10-30 40-400 0.1-10 2-10% B93015508
SUA145 AC/DC 42V UC 20-60 40-400 0.1-10 2-10% B93015509
SUA145 AC/DC 110V UC 50-150 40-400 0.1-10 2-10% B93015510
SUA145 AC/DC 230V UC 120-300 40-400 0.1-10 2-10% B93015511
           

Under voltage relay 3Ph AC

       
SUD142 3AC 110V AC 80-120 50-60Hz   5%  B933559
SUD142 3AC 230V AC 140-220 50-60Hz   5%  B933558
SUD142 3AC 400V AC 260-420 50-60Hz   5%  B933557
           

Under voltage relay 3Ph/N AC

       
SUD140 3NAC 110V AC 40-60 50-60Hz   5%  B933556
SUD140 3NAC 230V AC 80-120 50-60Hz   5%  B933504
SUD140 3NAC 400V AC 160-240 50-60Hz   5%  B933505
           

Under- and Over voltage relay 3Ph AC & 3Ph NAC

     
SUD472 3AC 208V AC 150-300 50-60Hz 0.3-5   B9331 ...
SUD472 3AC 230V AC 150-300 50-60Hz 0.3-5   B933170
SUD472 3AC 400V AC 270-520 50-60Hz 0.3-5   B933702
           
SUD473 3NAC 208V AC 80-170 50-60Hz 0.3-5   B9331 ...
SUD473 3NAC 230V AC 80-170 50-60Hz 0.3-5   B933171
SUD473 3NAC 400V AC 150-300 50-60Hz 0.3-5   B933703
           

Under voltage relay 3Ph AC

       
SUR353Z 3AC 208V 0.7-0.95 Un 50-60Hz 0.5-5   B9336010
SUR353Z 3AC 230V 0.7-0.95 Un 50-60Hz 0.5-5   B9331 ...
SUR353Z 3AC 400V 0.7-0.95 Un 50-60Hz 0.5-5   B933667
SUR353Z 3AC 440V 0.7-0.95 Un 50-60Hz 0.5-5   B933648
SUR353Z 3AC 480V 0.7-0.95 Un 50-60Hz 0.1-10   B933663
SUR353Z 3AC 660V 0.7-0.95 Un 50-60Hz 0.5-5   B933001
SUR353Z 3AC 690V 0.7-0.95 Un 50-60Hz 0.5-5   B933611
           

Under voltage relay  3Ph AC fast response <100msec.

     
Common relay output for under and over voltage    
SUR353Z-71 3AC 208V 0.7-0.95 Un 50-60Hz <100ms.   B933 ...
SUR353Z-71 3AC 230V 0.7-0.95 Un 50-60Hz <100ms.   B933 ...
SUR353Z-71 3AC 400V 0.7-0.95 Un 50-60Hz <100ms.   B933017
SUR353Z-71 3AC 440V 0.7-0.95 Un 50-60Hz <100ms.   B933 ...
SUR353Z-71 3AC 500V 0.7-0.95 Un 50-60Hz <100ms.   B933 ...
SUR353Z-71 3AC 660V 0.7-0.95 Un 50-60Hz <100ms.   B933 ...
SUR353Z-71 3AC 690V 0.7-0.95 Un 50-60Hz <100ms.   B933016
           

Under and Over voltage relay 3Ph AC 

     
SUR358Z 3AC 208V 0.7-0.95 Un 50-60Hz 0.5-5   B9331 ...
SUR358Z 3AC 230V 0.7-0.95 Un 50-60Hz 0.5-5.   B9331 ...
SUR358Z 3AC 400V 0.7-0.95 Un 50-60Hz 0.5-5   B933701
SUR358Z 3AC 440V 0.7-0.95 Un 50-60Hz 0.5-5   B933669
SUR358Z 3AC 500V 0.7-0.95 Un 50-60Hz 0.5-5   B933055
SUR358Z 3AC 660V 0.7-0.95 Un 50-60Hz 0.5-5   B933005
SUR358Z 3AC 690V 0.7-0.95 Un 50-60Hz 0.5-5   B933 ...
           

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Please contact us at (800) 356-4266 or Fax. (610) 383-7100 for technical assistance or sales support. e-mail: info@benderrelay.com
Bender Inc. 700 Fox Chase, Coatesville, PA 19320

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