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Westinghouse CA-5 - User Manual

Westinghouse CA-5
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

 î˜č
î™Șî™Ÿîšƒî™€î™Łî™Łî™€îšƒî™î™Żî™Ș  î™șî™Ș  î™Șî™Șî™Ș

 îš„î™»î™î™«î™żî™“î™°î™»î™Šî™î™»îšą î™î™«î™ˆîšą î™•î™î™«î™î™»î™îš„î™°î™»îšą î™¶î™»î™°îš„î™î™†îš„î™žî™±î™Źîšą
 î˜¶î™Źî™±îš’îš™î™Źî›€ îš“îš±îš§îš§î™żîšî™žî›€   îš„î™°îšŽî™żî™§î™Źî˜…î›€ 
 î™„îš‡îš’î™§îš…î™żîšî™žî›€ îš¶î™Œî™żî™§î™Œî›€  î™Œî™ŽîšŽî™Źî›€ î™„î™Źî™Źîšî›€ î™żîšîš„î™Źîš™îš§î™Źî™Ș  îš§î™Œî™Źî›€
  îš„î™Źî™§îš±îš™î™żîšî™žî›€ îš§î™Œî™Źî›€  î™Șîš±îš™î™żîšî™žî›€ îš„î™Œî™żîš“îšŠî™Źîšîš§î˜…î›€ 
      î™±îš™î™Źî™Źîš†îš»î˜…î›€ î™żîšîš„îš“î™Źî™§îš§î›€ îš§î™œî™Źî›€
   îš§î™Œî™Žîš§î›€îš§î™Œî™Źîš»î›€  î™Ș  îš“îš™îš’îš“î™Źîš™îš†îš»î˜…î›€
î™Ș  îš§î™Œî™Źî›€   î™§î™Œî™Źî™§îš…î›€ îš§î™Œî™Źî›€ îš„î™Źîš§îš§î™żîšî™žîš„î›€ î™Ș î™Źîš†î™Źî™§îšŸ
 î™§îš’îšîšî™Źî™§îš§î™żîš’îšîš„î˜Œî›€
î˜”î˜Źî˜Źî˜Łî˜žî˜˜î˜“î˜±î˜ î˜«î˜©î˜č
 î˜čî˜”î˜ˆî˜§î›€îš™î™Źîš‡î™€îš„î›€  î™Ș î™Șî™żî™±î™±î™Źîš™î™Źîšîš§î™żî™Žîš‡î›€ îš“îššîš’îš§î™Źî™§îšŸ
  î™Źî™żîš§î™Œî™Źîš™î›€     îš§îš¶îš’î˜‰îš¶î™żîšî™Ș 
îš§îš™î™Žîšîš„î™±îš’îš™îšŠî™Źîš™î˜Œî›€ î™†î™Œî™Źî›€ îš§îš™î™Žîšîš„î™±îš’îš™îšŠî™Źîš™î›€ î™Ș  
î™Ș  îš“îąˆîš§î™Œî™Źî›€  îš„îš“îš™î™żîšŽî™žî˜Œî›€ î™†î™Œî™Źî›€  
  îš„îš“îš™î™żîšî™žî›€   îš„î™Źîšîš„î™żîš§î™żîšŽî™żîš§îš»î˜Œî›€ î™†î™Œî™Źî›€ îšč
î™ș î™Ș îš§î™Œî™Źî›€  îš™î™Źîš˜îš±î™żîš™î™ŹîšŠî™Źîšîš§îš„î˜Œî›€
î˜ș 
î™…î™Źîš„îš§îš™î™Žî™żîšîš§î›€  î™§îš±îš™îš™î™Źîšîš§î›€ î™Ș  îšșî™Ș 
   î™Șîš±îš™î™żîšî™žî›€ îšș  î™†î™Œî™Źî›€
î™§îš’îšŠî™„î™żîšî™Źî™Ș îš„î™Žîš§îš±îš™î™Žîš§î™żîš’îšî›€   îš§î™Œî™Źî›€îšŠî™Žî™żîšî›€ î™Șîšș
îš™î™Žîš§î™żîš’î˜ˆîšŠî™Łî™§î™Œîš€îšî™žî›€ î™§îš±îš™îš™î™Źîšîš§î›€ îš§îš™î™Žîšîš„î™±îš’îš™îšŠî™Źîš™îš„î›€  î™Źî™żîš§î™œî™Źîš™î›€ î™Ș 
îš§î™Œî™Źî›€  î™Ș  îšșî™Ș îšș  îš§î™Œî™Źî›€ îšș
îšș 
 
î˜șîš±îš™îš™î™Źîšîš§î›€  î™Ș   î™Ș 
îšșî™Ș 


î˜ș
î˜„î˜•î˜›î˜„î˜„î˜źî›€ î™±îš±îš™îš§î™Œî™Źîš™î›€ îš§î™Œî™Źî›€ î™Ș î™Č 
î™Ș  î™Ș         î™„î™Źîš§îš¶î™Źî™Źîšî›€
îš§î™Œî™Źî›€    î˜ș î™†î™Œî™Źî›€   î™Șî™Źî™±î™żîšî™Źî™Ș î™Žîš„î˜Źî›€


  îš’î™±î›€îš§îš’îš§î™Žîš‡î›€îšîš±îš‹î™„î™Źîš™î›€  î˜ș   


 î™§îš±îšĄî™Źîšîš§î›€ îš§îš™î™Žîšîš„î™±îš’îš™îšŠî™Źîš™î›€   











 îš™î™Źîš„î™żîš„îš§î™Žîšî™§î™Źî›€  îš§î™Œî™Źî›€ î™Ș îšșî™Ș î˜ș
îš¶î™żîšî™Ș îš™î™Źîš„î™żîš„îš§î™Žîšî™§î™Źî˜Œî›€
 îšș  îš§î™œî™Źî›€      îšŠîš±îš†îš§î™żî˜Šîš™î™ąî™żîš’î›€
î˜ș  î™Ș 

  î˜Č   îš§î™Œî™żîš„î›€ î˜ș î™Œî™Ąî›€ 
  
î™źî˜Ÿ
  î™Ș îš§î™Œî™Źî›€ î™Ș î™Ș 
îšșî™Ș



î˜ș
 îšș 




î˜č î˜č î˜č î˜č
î˜˜î˜«î˜Šî˜Źî˜€î˜šî˜±î˜šî˜č î˜źî˜šî˜”î˜ î˜°î˜žî˜«î˜©î˜č
î˜”îš„îš„îš±îšŠî™żîšî™žî›€  îš™î™Źîš„î™żîš„îš§î™Žîšî™§î™Źî›€ î™Ș  

  
îš§î™œî™Źî›€ î™Șî™Źîšî›€î™±î™Žî™§îš§îš’îš™î˜…î›€  î™żîš„î˜Źî›€



 
îšș 
  î˜Ș



î˜ș
 îšș 

î™†î™Œî™Źî›€ îš’îš§î™Œî™Źîš™î›€   î˜ș  îš§î™Œî™Źîšî›€ î™Œî™ŽîšŽî™Źî›€  î™Ș
  î™œî™żî™žî™Œî›€  îšș î˜Ș      îšș î˜Ș
 î™•îąˆîš§î™œî™Źî›€ îš’îš§î™Œî™Źîš™î›€   î˜ș    î™„îš±îšî™Źîšî›€  
   î˜œî˜˜î˜Ÿî˜Łî˜˜î˜˜î˜…î›€    î™Ș 
îš„î™Žîš§î™żîš„î™±î™Žî™§îš§îš’îššîšŒî˜…î›€ îš„î™żîšî™§î™Źî›€ îš§î™œî™Źî›€ î™„îš±îšî™Źîšî›€î™±î™Žî™§îš§îš’îš™îš„î›€   î˜Ș î™Ș
îšȘ îš™î™Źîš„îš“î™Źî™§îš§î™żîšŽî™Źîš†îš»î˜Œî›€
 î™§î™îš‡î™§îš±îš†î™Žîš§î™żîšî™žî›€ îš§î™Œî™Źî›€ î™Ș  îš§î™Œî™Źî›€   î™Ș
î™Ș
î˜˜î˜«î˜©î˜°î˜±î˜źî˜Žî˜—î˜±î˜ î˜«î˜©î˜č
î™†î™Œî™Źî›€  î˜ș  î™§îš’îšîš„î™żîš„îš§îš„î›€   
î™Șî™żî™±î™±î™Źîš™î™Źîšîššîš‚î™Žîš†î›€ îš±îšî™żîš§î˜…î›€  î™Ș  îš„îš¶î™żîš§î™§î™Œî›€ îš±îšî™żîš§î˜…î›€
î™Ș   î™Ș î™żîšîš„îš§î™Žîšîš§î™›î™Źîš’îš±îš„î›€  îš±îšî™żîš§î˜Žî›€
î™†î™Œî™Źî›€ î™§îš’îšîš„îš§îššîš±î™§îš§î™żîš’îšî›€ î™Ș   îš§î™œî™Źîš„î™Źî›€ îš±îšî™żîš§îš„î›€  
î™±îš’îš‡îš‡îš’îš¶îš„î˜Źî›€
î˜”î˜§î™„î˜ î˜§î˜Œî™Šî˜›î˜Źî˜§î™“ î˜Č î˜Č
î™†î™œî™żîš„î›€ îš±îšî™żîš§î›€   îš™î™Źîš„îš§îš™î™Žî™żîšî™żîšî™žî›€  îš¶î™żîš§î™œî›€ 
îš¶î™żîšî™Șî™żîšî™žîš„î˜…î›€î™›î™Ș î™Źîš†î™ŹîšŒî™Źîšîš§î›€îš¶î™œî™żî™§î™œî›€î™żîš„î›€î™Źîšî™Źîš™î™žî™żîšœî™Źî™Ș
  îšș îšșîšîš†î™żî™žîšŒî›€ î™§îš±îšąî™Źîšîš§î›€  
î™Ș îš¶î™żîš§î™Œî›€ îš§î™Œî™Źî›€ î™§îš±îš™îš™î™Źîšîš§î›€ î™·îš’îš¶î™żîšî™žî›€  îš§î™œî™Żî›€ î™Șî™żî™”î™Źîš™î™Żîšîš§î™żî™Žîš†î›€
  îš§î™Œî™Źî›€  î™§îš±îš™îššî™Źîšîš§î›€ îš§îš™î™Žîšîš„î™łîš’îš™îšŒî™Źîš™îš„î˜Œî›€ 
 îš§î™œî™Źî›€îš„î™Źîšîš„î™żîš§î™żîšŽî™żîš§îš»î›€  îš§î™Œî™Źî›€   î™Ș
  îšș îš§îš™î™Žîšîš„î™±îš’îššîšŠî™Źîš™î˜Œî›€
î™†î™Œî™Źî›€    îš§î™œî™Źî›€ î™Șîš±î™§îš§î™żîš’îšî˜ˆî™Ș 
îš¶î™żîš§î™Œî›€  î™Źîš‡î™Źî™§îššîš™îš’îšŠî™Žî™žîšî™Źîš§îš„î›€ îš’îš“î™Źîš™î™Žîš©î™żîšî™žî›€  îš§î™œî™Źî›€  î™Șî™żîš„î™§î˜Œî›€
î™†î™Œî™Źî›€  î™č  îš§î™œî™Źî›€ îš™î™Źîš„îšźî™•îšî™żîšî™č îšŽîšîąˆîš§î™œî™Źî›€
   îš§î™œî™Żî›€   î™ˆî™œî™Źîš„î™Źî›€
 î™Ș    î˜»î™żî™žîš„î˜Œî›€  î™Ș
î™†î™Œî™Źî›€ î™Ș  îšŠîš’îš±îšîš§î™Źî™Ș    î™Č î™†î™œî™Żî›€
 î™„î™Źî™î™żîšî™žî›€  îš§î™œî™Żî›€ îš™îšîąˆî™żîš„î›€    îššî™żî™«î™żîšî™žî›€ î™„î™ŹîšŸ
îš§îš¶î™Źî™Źîšî›€  îš„î™îš–îš“î™œî™żîš™î™Źî›€ îš„î™Żîš¶î™Żîšˆî›€ îšŠîšłî™Žî™î™§î™Żîš„î˜Œî›€  
 î™Ș  îš§î™œî™Źî›€îš±îš“îš“î™Źîš™î›€ î™Ș î™Čî›€îš©î™Ÿî™Żî›€ 
î™ˆî™œî™Źî›€   î™îš„îšŠî™ŻîšŒî™Šîš†îšŒî›€  î™îš§îš§î™î™©î™œî™Żî™Ș  
 î™„îš±îš„î™Œî™żîšî™žî›€  îš§î™œî™Źî›€ î™Ș  î™Œî™œî™Źîšî›€ îš§î™œî™Źî›€ 
  îš§î™Œî™Źî›€ îš„îš§î™Žîš§î™żîš’îšî™žîšŒî›€  îš§î™œî™Źî›€ 
 îš„îš“îš™î™żîšî™žî›€î™Șî™Č  î™Ș  îš¶î™żîš“î™żîšî™žî›€ î™î™§îš§î™żîš’îšî˜Œî›€î™ˆî™œî™Źî›€
î˜č î˜č î˜č
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Summary

APPLICATION

Transformer Relay

Requirements for transformer differential protection.

CONSTRUCTION

Percentage Differential Unit

Description of the differential unit's construction and operation.

OPERATION

CHARACTERISTICS

SETTING THE RELAY

INSTALLATION

ADJUSTMENTS AND MAINTENANCE

Differential Unit

Testing procedures for the differential unit's minimum pickup and slope.

Routine Maintenance

Repair Calibration

Minimum Pickup

Adjustment of spiral spring for minimum pickup current.

Percentage Slope Characteristic

Checking operating current for percentage slope curve.

Westinghouse CA-5 Specifications

General IconGeneral
TypeElectromechanical Relay
CategoryGeneral Purpose Relay
FunctionSwitching
Operating Temperature Range-40°C to +70°C
Contact FormDPDT
Contact Rating10A at 250VAC
Coil Voltage12VDC
Electrical Life100, 000 cycles
Mechanical Life10, 000, 000 operations

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