The RMO-T Series of Tap Changer Analysers and Winding Ohmmeters are designed for winding resistance measurements (RMO-TW), and additional tap changer analysis capabilities (RMO-TD & RMO-TT). These instruments are based on the state-of-the-art technology, using the most advanced switch mode technology available today. All RMO-T units generate a true DC ripple free current with an automatically regulated measurement and discharging circuit.

RMO-TD & TT instruments can perform simple, quick and reliable transformer OLTC condition assessments. These instruments enable measurements of a winding resistance in every tap position, current ripple values (percentage of a current drop during a tap change) and transition times during tap changes.

Typical application areas of the RMO-T Series are high-voltage substations and industrial environments. They are intended to measure the resistance of:

Transformer windings

On-load tap changers

Generators

Electrical motors

High-current busbar joints

Cable splices

Welding joints

DV Power provides a 3-year warranty on all test instrumentation. This is a guarantee to our customers that they will receive the highest quality test equipment on the market.

RMO-TW series

Three-channel winding resistance measurement, one temperature measurement channel, automatic demagnetisation and tap changer verification.

Test current 5 mA – 10 A DC

Output Voltage up to 55 V DC

Sampling Rate 4 ms

Weight 8 kg

Test current 5 mA – 20 A DC

Output Voltage up to 55 V DC

Sampling Rate 4 ms

Weight 8 kg

Test current 5 mA – 30 A DC

Output Voltage up to 55 V DC

Sampling Rate 4 ms

Weight 8.5 kg

Test current 5 mA – 50 A DC

Output Voltage up to 55 V DC

Sampling Rate 4 ms

Weight 8.5 kg

RMO-TD series

Tap changer analysis (DRM) and OLTC motor current measurement in addition to all RMO-TW features.

Test current 5 mA – 25 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 10 kg

Test current 5 mA – 40 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 13.5 kg

Test current 5 mA – 60 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 14 kg

RMO-TT series

Extra temperature measurement channels in addition to all RMO-TD series features.

Test current 5 mA – 25 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 10 kg

Test current 5 mA – 40 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 13.5 kg

Test current 5 mA – 60 A DC

Output Voltage up to 55 V DC

Sampling Rate 0.1 ms

Weight 14 kg