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Megger’s TDS NT test set offers comprehensive facilities not only for the standards-compliant testing of power cables but also for diagnosing and accurately locating cable faults.

TDS NT test set

Fast and intuitive in operation, the TDS NT provides users with a convenient way of determining information about the quality and condition of their cable installations.

For cable testing and, when required, simultaneous partial discharge (PD) evaluation, the TDS NT uses Megger’s 50Hz Slope technology. This is a standards-compliant very low-frequency (VLF) test technology that employs a test voltage with a 0.1Hz cosine-rectangular waveform. 

The rising and falling slopes of this waveform are almost identical to the corresponding slopes of a 50Hz sine wave and, as a result, the test data obtained accurately relates to the behaviour of the cable when energised at power frequency.

In addition, the TDS NT provides damped AC (DAC) voltage testing. This allows detailed PD diagnostics to be performed and, because the test technique is inherently non-destructive, it is suitable for use not only on newly installed cables, but also as an aid to condition-based maintenance of older cable systems. Test data obtained with DAC voltage testing accurately relates to the behaviour of the cable when energised at power frequency. 

Key features and benefits

  • The software supplied with the TDS NT features fully automatic calibration with display of signal-to-noise ratio, as well as live PD mapping, which allows reliable automatic detection and precise location of partial discharge events while the test is being performed.
  • Immediately after a test has been completed, users can, with a simple mouse click, generate a report containing a structured summary of the most important measurements.
  • Designed with safety in mind, Megger’s TDS NT test sets incorporate an integrated discharge unit, earth loop monitoring and breakdown detection.
  • The test sets, which are available in 40kV and 60kV versions, consist of two major components: the voltage generator itself, which has two parts, and the partial discharge detector. This arrangement makes them easy to transport and convenient to use, even in challenging site locations.

Megger

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

Megger offers equipment for testing breakers, protection relays and CTs, as well as transformers, earthing systems and standby batteries to the electrical generation, transmission and distribution industries. In the LV sector Megger is the market leader for the testing of building wiring to the 17th Edition of the Wiring Regulations and portable appliances.

They have recently acquired a range of water leak detectors

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