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PD-SGS

The PD-SGS is an on-line Partial Discharge (PD) spot tester for HV assets. The instrument detects TEV signals generated by internal discharge in Air Insulated Switchgear (AIS), acoustic discharge generated by surface tracking or corona, high frequency signal generated by cable partial discharge, and ultra-high frequency signal generated by internal discharge in Gas Insulated Switchgear (GIS).

PD-SGS in action

Key Benefits

Rapidly survey the whole substation

and detect MV and HV problems before they occur

Personnel Safety Device

ensure the substation is clear of PD before conducting work

Hear the PD

only instrument available that allows the user to hear PD activity

Ensure accurate results

auto separation when the device detects background Noise instead of real PD

Ergonomic and compact design

fits in the user’s pocket and Is easy to use

Long lasting battery

allowing a whole day of testing without requiring a recharge

Spec sheet

Features

  • Measurement of TEV signals generated by internal AIS PD
  • Ultrasonic detection of surface PD activity
  • Compatible with HFCT and UHF sensors for cable and GIS PD activity
  • Automatic Background Noise Separation
  • Level Mode and PRPD Mode
  • Bright OLED screen display with dB readings
  • Audible output through headphones or built in speaker
switch gear - air insulated
switch gear - air insulated

Switchgear – Air Insulated (AIS)

PD activity inside metal clad high voltage plant induces small voltage impulses called Transient Earth Voltages on the surface of the metal panels. TEVs travel around the surface to the outside of the switchgear, where they can be picked up externally using the PD-SGS.

Defects on the surface of high voltage insulators are prone to a phenomenon known as surface tracking. Tracking causes carbon deposits that build up over time, ultimately leading to flashover and insulation failure. The PD Detector is highly sensitive to the ultrasonic emissions produced by tracking and enable the onset to be detected before insulation failure.

 

switchgear - gas insulated

Switchgear – Gas Insulated (GIS)

Switchgear – Gas Insulated (GIS)

IPEC’s UHF (Ultra High Frequency) sensor is used to detect PD in EHV cable terminations, GIS (Gas Insulated Switchgear), GIL (Gas Insulated transmission Lines) & GIT (Gas Insulated Transformers). The sensors pick up signals in the UHF range (200MHz-2.0GHz) and are mounted against the insulating barrier spacers that separate components of the HV asset.

Cable

Partial discharge activity in solid high voltage insulation induces small high frequency currents in the earth conductor of the electrical system. These impulses travel along the equipment earth to the substation earth. Using a high frequency current transformer, they can be detected as they pass through the CT.

ipec

Advantages of the PD-SGS

Advantages of the PD-SGS

  • Rapidly survey the whole substation – and detect MV and HV problems before they occur
  • Personnel Safety Device – ensure the substation is clear of PD before conducting work
  • Ensure accurate results – auto separation when the device detects background Noise instead of real PD
  • Ergonomic and compact design – fits in the user’s pocket and is easy to use
  • Long lasting battery – allowing a whole day of testing without requiring a recharge

Add-on Sensors Option

  • HFCT: cable PD detection
  • UHF: GIS PD detection
  • Ultrasonic Parabolic Dish: bushing PD detection

ACCREDITATIONS