On-Line PD monitoring switchgear and its Efficiency

Are you interested in the diagnosis of any insulation fault before it happens and cause expensive irreparable damages? Then employing the use of an On-Line PD testing switchgear is the way to go. By this, you will be able to determine how safe existing switchgear is, provide lots of desirable and valuable information before you can consider making a replacement or even a retrofitting.

Below are some of the great benefits you anticipate to get when you employ the use of an on-Line PD monitoring and testing switchgear;

Ø  There is always a reduced network downtime

Ø  Switchboard safety is highly increased

Ø  Increasing the knowledge of the condition of your assets is inevitable. In fact this is the greatest pro of all of them.

The partial discharge measurement, testing and the monitoring process is carried out by the use of Transient Earth Voltage (TEV) sensors, Acoustic detectors as well as the High Frequency Current Transformers (HFCT).  There is no requirement for shutdown when the above sensors are being used since they happen to be all non-invasive.

The PD Cable Mapping

The capturing of waveforms from the sensors is done by the Testing Unit that performs a sampling rate of as high as 500 MS/s. The software used in this device ensures that the discharges are classified through examination of the waveform shape together with the frequencies. Since the waveforms are studied from multiple efficient TEV sensors, LIVE HV test engineers are able to read the PD levels as well as accurately locate the area where the PD emanates from.

As the switchgear continues to age, there is a greater likelihood that dangerous PD will increase. Most of the ageing switchgear has no capability of withstanding any internal fault.  As a result, the operators can end up grappling with more serious issues  of running aged switchgear which most often leads to failure.

PD testing switchgear will be able to detect any fault such as installation of cables in an unsuitable cable box. When you consider making a switchgear replacement, you are as well advised to run a PD testing since this can easily and quickly give you a direction to the switchboards that are imposing great risks to one’s network. PD testing is a network testing system that can also be used in the determination of the feasibility of a retrofitting of a new circuit breaker into an already existing switchboard.

Switchgears are tested for a partial discharge during the time of manufacture. However, the Australian Switchgear Maintenance Standard AS2467 does recommend that a routine checkup should be done on the switchgear insulation throughout the lifetime of the switchgear. The PD testing equipment that has been lately designed provides accurate assessments of insulation as well as locating all the PD sites. All these happen while the switchgear still remains live.

Online partial discharge testing and monitoring has helped many businesses to maintain the reliability and longevity of their electrical assets. It is the best investment to optimize on your infrastructure without making significant investments in retrofitting the installations.

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