Westinghouse RC User Manual

  


  
  
    
      
        
       
        
         
         
 

       
       
        
      
        
        
        
       
      
     
          
       
       
     
       
        
        
      
       
       
          
         
       
        
        
        
       
      
         
         
      

      
      
  
 

     
      
        
        
          
    

         
      
       
    
 
 
       
       
        
         
         
         
        
          
        
          
          
        
          
    
       
        
          
       
           
          
  
        
       
          
       
      
 


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Westinghouse RC Specifications

General

Brand	Westinghouse
Model	RC
Category	Relays
Language	English

Summary

APPLICATION

CONSTRUCTION

Timing Unit

Describes the synchronous motor, gear train, drum, and cams.

Y Solenoid Unit

Explains the Y unit coil, plunger, and its effect on contacts Y5, Y6, Y7.

Instantaneous X Unit and Optional Cumulative Lockout

Describes the X unit, ratchet mechanism, and lockout contact.

Instantaneous Z Unit (When used)

Describes the Z unit as a clapper type auxiliary relay with specific contacts.

OPERATION

Motor Control

Explains how cams 1 and 2 control motor energization based on breaker status.

Closing Sequencing

States reclosure count and timing depend on #3 cam screw location.

Instantaneous Trip Lockout

Explains how Y13 and 14 contacts open the trip circuit after the first reclosure.

X-Y Anti-Pump Circuit

Describes the X-Y anti-pump circuit preventing premature breaker energization.

Lockout

Explains motor de-energization and manual reset requirement in lockout.

Reclosing Through Contact Y6

Explains how contact Y6 can be used for delayed reclosing.

Lockout Alarm

Describes setting up an alarm for when the breaker locks out.

Additional Instantaneous Tripping

Explains how contact #4 can re-establish the instantaneous trip circuit.

Selective One-Shot Instantaneous Reclosing

Explains how to achieve selective instantaneous reclosing using external devices.

Relays with Z Unit

Explains how the Z unit is energized and its contact functions.

Motor Operation from DC

Explains using an external inverter for DC motor operation.

CHARACTERISTICS

Burden Data

Lists maximum burdens for various units of the relay.

SETTINGS

Coil Resistor Reconnection

Details how to bypass coil resistors for different voltage/current configurations.

Drum Speed

Explains how to adjust the drum speed using the speed dial and clamping screw.

Reclose Sequence

Describes setting cam springs for reclosing intervals and maximum number of reclosures.

INSTALLATION

ADJUSTMENTS AND MAINTENANCE

Acceptance Check

Outlines factory settings and acceptance check procedures for the relay.

Routine Maintenance

Motor Lubrication

RENEWAL PARTS