We can supply testing equipment for partial discharge, impulse, heat cycle and other types of testing requirements.

We can supply complete system for partial discharge testing including shielded room for up to 500kV cables. We can also supply other testing equipment for AC withstand test, impulse test, heat cycle test, tan delta etc.

This system is developed from the foreign advanced technology & interrelated product. It suits the test of PD detect, withstand test and PD fault locate of the XLPE cables under 500kV. The relevant recommendations: GB/T11017-2008, GB/T12706-2008 and IEC60502-2005. The whole system has the advantage of the compact structure, multi-function, easy operate and safety. It can supersede the analogously equipment of foreign production. It is composed of high voltage reactor, double shield isolation transformer, regulator, high voltage capacitive divider, high voltage injection capacitor, PD detector, PD fault locator and shielded room. The whole system more than three hundred have been using in the electric wire & cable manufactures.

1.Figure Drawing of the system

1-double isolation transformer 2-control desk 3-regulator 4-low voltage filter 5-exciter transformer 6-high voltage reactor 7-capacitive divider 8-PD detector 9- PD fault locator 10-high voltage filter 11-high voltage injection capacitor 12-test terminal of cable 13-test object

2.Main feature PD level:less than 2PC

 Quality facror:Q not less than 40

 Accuracy of fault locating:≤±2.5m(±1%)

 Accuracy of voltage measurement:≤±3%

The system has the function of timer, ARC detector, interlock, over current protection, zero start and output tap setting control. Tuning range can work on the PD test, withstand test and fault locate of power cable of max. cross-section 1500mm2 ,longest length 1000m for rated voltage under 500kV.

3.Main feature of shield room and control room

 Resistance of ground is less than 1Ω or less than resistance of ground power distribution.(These shall be done by user according to our drawing)

 Resistance of insulating layer≥1000MΩ

 Attenuation of shield room:10kHz-100kHz:60dB-80dB,100kHz-100MHz:70dB-100dB

 Dimensions of the shield room suits the user's requirement. The whole structure of the building is made of steel frames. The wall is covered with steel plate. Sandwich-structure color steel plates filled with form are used to decorate the outside wall. The control room is composed of sandwich-structure color steel plates, the window and door is made of aluminum alloy. The floor covered with internal decoration floor plates.

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PD testing device for 500KV XLPE power cable