Westinghouse HZ User Manual


 
    

     
 

      
      
      
       
     
         
       
      
     
      
     
      
       
      
       

     

         
       
      
       
        


    


    
         

      
     

        
      
       
        
      
       
        
      
      
 


 
 
  
   
       
     
      
     
        
       
       
       
      
    
       
        
       
 
   

     
 

    
      
      
      
      
       



    


    
    
     
       
       
  
  
     
    

     


       
       
        
        
       
        
      
      
  
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Westinghouse HZ Specifications

General

Ambient Temperature	-40°C to +70°C
Coil Voltage	12VDC, 24VDC, 120VAC, 240VAC
Insulation Resistance	100MΩ min at 500VDC
Dielectric Strength	1500VAC for 1 minute
Vibration Resistance	10-55Hz, 1.5mm amplitude
Shock Resistance	10G

Summary

INTRODUCTION

COMPONENTS OF COMPLETE EQUIPMENT

CARRIER RELAYING SCHEME

OPERATION OF SCHEME

Explains how distance and directional relays operate within the carrier scheme for fault detection and tripping.

Out-of-Step-Protection

Details how the system prevents relay operation during out-of-step conditions.

ADDITIONAL CARRIER CHANNEL USES

Covers the use of the carrier channel for secondary functions like telemetering and communication.