1. The dielectric in most Celem’s capacitors is polypropylene, which can be safely heated up to 90°C during operation without any degradation. Under full power when this temperature is achieved at the hottest point of the capacitor’s core, the external temperature of the capacitor’s surface is 45 - 50°C.
  2. We recommend to measure the capacitor’s copper surface and to make sure that it is below 40 degrees C. For operation below full power, the external temperature of the capacitor could be more than 40 degrees C. Please check here.
  3. Better cooling can be achieved either by using colder water, or by increasing the flow. 
  4. For safety cooling margin the losses of a mounted Celem capacitor can be estimated to be of the order of 1/700. Therefore one should expect that 500kVAr capacitor at full power will generate 715W of heat.
  5. Water flow of 1 liter/minute when dissipating 1kW will be heated by 14 degrees C. (calculated by specific heat of water)   This ratio enables to calculate the desired water flow, once power losses and water inlet temperature are given.
  6. Maximum inlet water pressure in Celem water cooled capacitors is 5 Bar.
  7. Both sides of a Conduction Cooled capacitor must be connected to a water cooled bus bar.
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Celem Passive components Ltd.

Celem Passive Components Ltd.

12/2 Hi Tech village, Givat Ram

P.O. Box 39109

Jerusalem 91390, ISRAEL

Tel.  +972 2 6788305

Fax. +972 2 6536094

Tel.  + 972 2 6788305

Fax. + 972 2 6536094

Email: Celem Techsupport

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