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Vanguard Instruments Company, Inc., Electronic Testing Equipment, Ontario, CA

Circuit Breaker Contact Resistance Meters

       

Low Resistance Micro-Ohmmeter

 
       
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The Vanguard Auto-Ohm 10 is a 10-ampere battery powered micro-ohmmeter designed for low-resistance-measuring applications such as the measurement of resistance in circuit breaker contacts, bushing contact joints, and welding joints. The unit is powered by four 3400mAh, 3.7Vdc Li-Ion rechargeable batteries. With these high capacity batteries, up to 2,900 tests per charge (10A/2 second duration) can be performed in the field.
  • High capacity Li-Ion batteries (perform up to 2,900 tests per charge (@ 10A/2 sec)
  • Built-in charger and line-power for continuous operation
  • Transformer winding resistance test mode
  • Contact resistance test mode
  • Protected to 600V
  • Lightweight (7.8 lbs. / 3.54 Kg)
       

DC Micro-Ohmmeter

 
       
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The Auto-Ohm-200 S3 is Vanguard’s fourth generation, microprocessor-based, true DC micro-ohmmeter. It is designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application. This high current and very lightweight (16.8 lbs/ 7.6 Kg) micro-ohmmeter is designed to meet the IEEE C57.09-1999 (5.15) requirement for testing circuit breaker contact resistance.

  • Very lightweight: 16.8 lbs. (7.6 Kg)
  • Measures circuit breaker contact resistance with safety ground on (with the Dual Ground option)
  • Stores test records on-board or on external USB Flash drive
  • 1 to 200A programmable test current
       

DC Micro-Ohmmeter

 
       
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The DMOM-200 S3 is Vanguard’s fourth generation, microprocessor-based, true DC micro-ohmmeter. It is designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application. This high current and very lightweight (19.8 lbs/ 8.9 Kg) micro-ohmmeter is designed to meet the IEEE C57.09-1999 (5.15) requirement for testing circuit breaker contact resistance.

  • Very lightweight: 19.8 lbs. (8.9 Kg)
  • Measures circuit breaker contact resistance with safety ground on (with the Dual Ground option)
  • Stores test records on-board or on external USB Flash drive
  • 1 to 200A programmable test current
  • Built-in 2.5" wide thermal printer
       

DC Micro-Ohmmeter

 
       
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The DMOM-600 is specifically designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application. This high current and very lightweight (33 lbs/ 15 Kg) micro-ohmmeter is designed to meet the IEEE C57.09-1999 (5.15) requirement for testing circuit breaker contact resistance.

  • Measures circuit breaker contact resistance with safety ground on (with the Dual Ground option)
  • Stores test records on-board or on external USB Flash drive
  • 10 to 600A programmable test current
  • Built-in 2.5" wide thermal printer
       

Safety Ground Tester

 
       
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The Vanguard SGT-200 Safety Ground Tester is a 200A DC micro-ohmmeter designed specifically to measure the resistance of protective in-service grounding and jumper cable assemblies. The SGT-200 can measure the resistance of the grounding cables, clamps and ferrules. The measured resistance values can be compared against the calculated values (using the ASTM 2249-03 standard) and a Pass/Fail result can be printed along with the measured resistance values. Since the SGT-200 uses a DC current, there is no need to uncoil the cable under test.

       

Field Pictures

   
       
DMOM-200 S3 Training at Eskom, Steelpoort, South Africa
DMOM-200 S3 at ABB Facility in Lima, Peru