Transformer Winding Resistance Meters

       

LTCA-10

Load Tap Changer Analyzer

  
       
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The LTCA-10 Analyzer is a second generation load tap changer analyzer. The LTCA-10 accurately measures winding resistance of highly inductive power transformers. Triple resistance-reading channels allow the measurement of three winding resistances simultaneously. Four-wire (Kelvin) connections provide high accuracy and require no lead compensation. A special feature of this device is its ability to measure and graph the resistance trace of a transformer LTC during operation. Using a 60Vdc power supply, the LTCA-10 is capable of outputting 10 amperes.
  • Auto discharge circuit for operator safety
  • 3 resistance reading channels including one dynamic channel
  • Digital resistance reading from 1 micro-ohm to 500 ohms
  • Calculate equivalent resistance value at reference temperature
  • Stores 50 static records and 20 dynamic records
  • Built-in 4.5-inch thermal printer
  • Weighs less than 44 lbs.
       

LTCA-40

Load Tap Changer Analyzer

  
       
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The LTCA-40 Analyzer is a second generation load tap changer analyzer. The LTCA-40 accurately measures winding resistance of highly inductive power transformers. Triple resistance-reading channels allow the measurement of three winding resistances simultaneously. Four-wire (Kelvin) connections provide high accuracy and require no lead compensation. A special feature of this device is its ability to measure and graph the resistance trace of a transformer LTC during operation. Using a 60Vdc power supply, the LTCA-40 is capable of outputting 40 amperes.
  • Auto discharge circuit for operator safety
  • 3 resistance reading channels including one dynamic channel
  • Digital resistance reading from 1 micro-ohm to 500 ohms
  • Calculate equivalent resistance value at reference temperature
  • Stores 50 static records and 20 dynamic records
  • Built-in 4.5-inch thermal printer
  • Weighs less than 44 lbs.
       

TRM-20

Transformer Winding Resistance Meter

  
       
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The TRM-20 is Vanguard Instruments’ third generation transformer winding resistance meter. The TRM-20 is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.
  • Auto-discharge circuit for operator safety
  • Demagnetizes transformer after test
  • Selectable test current from 1A to 20A
  • RS-232C, USB, and Bluetooth computer interfaces
  • Built-in thermal printer
       

TRM-40

Transformer Winding Resistance Meter

  
       
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The TRM-40 is Vanguard Instruments’ third generation transformer winding resistance meter. The TRM-40 is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.
  • Auto-discharge circuit for operator safety
  • Demagnetizes transformer after test
  • Selectable test current from 1A to 40A
  • RS-232C, USB, and Bluetooth computer interfaces
  • Built-in thermal printer
       

WRM-10

Winding Resistance Ohmmeter

  
       
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The WRM-10 is a microprocessor based low resistance ohmmeter. With 10 Amperes of test current, the WRM-10 can quickly provide a stable resistance reading of any large transformer. Dual resistance-reading channels allow the user to measure two winding resistances on the same test cycle. To ensure the operator safety, the WRM-10 automatically discharges the transformer core energy after each test.
  • Auto Current Ranging from 10 MA to 10 Amps
  • Digital Resistance Reading from 1 micro-ohm to 2,000 ohms
  • Auto discharge circuit for operator safety
  • Weighs less than 27 lbs.
       

WRM-10P

Winding Resistance Ohmmeter

  
       
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The WRM-10P is a low resistance ohmmeter with all of the features of the WRM-10 above. In addition to the features of the WRM-10, the WRM-10P includes a built-in 2.5" wide thermal printer that allows test records to be printed in the field. Test records can also be downloaded to a PC.
  • Range from 1 micro-ohm to 2,000 ohm
  • Up to 10 Amperes of test current
  • Auto discharge circuit for operator safety
  • Built-in 2.5" Thermal Printer, computer interface
  • Stores 48 records of 63 readings
  • Weighs less than 27 lbs.
       

WRM-40

Winding Resistance Ohmmeter

  
       
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The WRM-40 is a microprocessor based low resistance ohmmeter. With 40 Amperes of test current, the WRM-40 can very quickly provide a stable resistance reading of any large transformer. Dual resistance-reading channels measure two winding resistances on the same test cycle. The WRM-40 ensures operator safety by automatically discharging the transformer core energy after each test.
  • Auto Current Ranging from 10 MA to 40 Amps
  • Digital Resistance Reading from 1 micro-ohm to 500 ohms
  • Auto discharge circuit for operator safety
  • Built-in 2.5" Thermal Printer, computer interface
  • Stores 48 records of 63 readings
  • Weighs less than 30 lbs.
       

Field Pictures

   
       
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