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Continue ReadingWinding Ohmmeter
Posted on by Nasir Anwar
Many different tests are performed on rotating machines to determine their state and discover possible future failures. One of the tests that are used to determine electrical problems is the DC winding resistance measurement. For the purpose of measuring low resistance accurately, winding ohmmeters such as RMO-M Series are used. Simple and quick reliable DC resistance measurement […]
Continue ReadingTransformer Demagnetizer
Posted on by Nasir Anwar
The transformer magnetic core may become magnetized as a result of DC current testing (such as winding resistance measurement), or when the transformer is taken out of service. In order to avoid problems such as the incorrect operation of protective relays, high inrush currents or erroneous diagnostics, it is recommended to perform demagnetization to eliminate this […]
Continue ReadingTurns Ratio Tester
Posted on by Nasir Anwar
Transformer turns ratio testers from TRT series are DV Power instruments mainly designed for the measurement of power transformer turns ratio. Also, they measure transformer excitation current and phase shift. Special tests, such as automatic vector group detection and magnetic balance, can be performed on three-phase transformers and three-phase autotransformers. All models, except TRT03 and TRT-H series, have […]
Continue ReadingWinding Resistance Meter & Tap Changer Analyzers
Posted on by Nasir Anwar
Winding resistance test of inductive test objects, such as power transformers, is one of the most effective non-intrusive ways of checking its condition. Due to their advanced design, DV Power winding resistance meters provide high test currents (up to 100 A DC) and high accuracy (up to 0.1%) within light and portable test instruments. In […]
Continue ReadingDisconnector Analyzer
Posted on by Nasir Anwar
Disconnector analyzers may have a large number of features and applications, but the most important one is the ability to measure the current, voltage and power of a specific motor drive. The usage and the diagnosis advantages of an analyzer can improve the operations and extend the life of the electrical motor. Another parameter to […]
Continue ReadingCB Analyzers & Timers
Posted on by Nasir Anwar
CAT circuit breaker analyzers and timers are advanced standalone or a PC controlled instruments for circuit breaker maintenance. Typical application areas of CAT instruments are medium and high voltage substations at electric power generation, transmission, and factories of switchgear. Also, industrial environments and electric power distribution are suitable application areas for these circuit breaker testing […]
Continue ReadingCoil Analyzers & Power Supply Units
Posted on by Nasir Anwar
Coil analyzers and power supply units are portable and lightweight devices intended for use in harsh switchyard and industrial environments. The typical application is switchgear and circuit breaker testing when substation battery is not connected or available. An advantage over substation battery is enabled testing in under-voltage and over-voltage conditions. Furthermore, the stable voltage outputs […]
Continue ReadingMicro-Ohmmeters
Posted on by Nasir Anwar
Contact resistance measurement is one of the most important and common tests during switchgear manufacturing, commissioning and maintenance stages. Besides switchgear testing, the RMO digital micro-ohmmeters are designed for simple, safe and efficient testing of: disconnecting switches, high-current bus bar joints, cable splices, welding joints, and different high-current links in factory and high-induction field environments. […]
Continue ReadingMotor Testing
Posted on by Nasir Anwar
Winding ohmmeters RMO-M series measure winding resistance of inductive test objects such as electrical motors and generators. Motor test or generator test of winding resistance is especially important for early-stage failure detection. RMO-M series instruments generate true DC ripple-free current with automatically regulated measurement and discharge process. Even more, test instruments are portable and enclosed in […]
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