RMO20TW

The Winding Ohmmeter RMO20TW is a portable and lightweight instrument (7,5 kg / 16.5 lbs) designed for the winding resistance measurement of inductive test objects and for on-load tap changer verification. The RMO20TW instrument generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. The injection of current and discharge of energy from the test object are both automatically regulated. The three independent channels enable testing of three windings in series. This instrument enables measurements of a winding resistance in every tap position of an on-load tap changer without discharging between the tests. Problems with switching of the OLTC, such as interruption, can be detected with these measurements.

Categoria:

Descrição

RMO-TW, TD and TT Series

The Tap Changer Analyzers & Winding Ohmmeters RMO-T series are designed for winding resistance measurement of inductive objects, and for a tap changer analysis. The RMO-T instruments are based on the state of the art technology, using the most advanced switch mode technology available today. The RMO-T instruments are accurate (0,1%), powerful (up to 100 A) and lightweight (7,5 – 15,5 kg). They generate a true DC ripple free current with automatically regulated measurement and discharging circuit.

RMO-T instruments can perform a simple, quick and reliable transformer on-load tap changer condition assessment. 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 the tap changes. Problems with a connection, contacts, and selector/diverter switch operation (tap change with interruption) can be detected with these measurements.

Typical application areas of the RMO-T 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