PD Cable Monitor adds continuous testing of medium and high voltage cables

EA Technology’s PD Cable Monitor’s RFCT sensors provide continuous testing for PD activity in all types of MV/HV cables.

Plant City, Fla.—EA Technology has a developed a new system that continuously monitors Partial Discharge (PD) activity in all types of live MV/HV cables up to 2.5 miles in length.

Called the PD Cable Monitor, it uses Radio Frequency Current Transformer (RFCT) sensors that plug into the company’s existing UltraTEV Monitor and displays PD activity as picocoulombs (pC). It also functions as an alarm system, automatically alerting operators if PD activity reaches critical levels in any cable being monitored.

The PD Cable Monitor adds a sixth measurement capability to the UltraTEV Monitor, which already features five sensor technologies for measuring PD activity in switchgear and transformers, together with the environmental conditions that influence it: ultrasonic, Transient Earth Voltages (TEV), relative humidity, atmospheric pressure and temperature.

EA Technology USA President Don Genutis said: “The ability to test live cables continuously, without the need to de-energize them, has until now been the missing link in PD monitoring of substations. This is a big step forward in the quest for greater reliability and more effective condition-based asset management.”

The PD Cable Monitor is being offered for purchase as an add-on module for the UltraTEV Monitor or can be deployed as part of a field service by EA Technology technicians. It can be installed permanently or for short periods.

The standard package provides users with a real time graphical display of PD activity on the UltraTEV Monitor’s web-enabled hub, using a variety of parameters, including severity, magnitude and pulse count. Results can also be viewed online and the hub automatically transmits critical activity alerts via text message and/or email.

As an option, EA Technology offers to record cable PD activity as waveforms over time. These waveforms can then be analyzed by the company’s experts to provide detailed maps of the location and severity of PD-related faults, with recommended actions. The service is available online, anywhere in the world.

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