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Contact SupplierTRANSQUELL Surge capacitors are designed for protection of rotating electrical machines (large electrical motors‚ generators‚ etc)‚ connected to systems which are subject to voltage and switching surges. The magnitude of lightning and switching surges are often controlled by lightning arresters‚ but this form of protection may not be sufficient to protect the turn to turn insulation of rotating machines from steep fronted voltage waves. It is therefore essential to connect a capacitor between line and earth to modify the rate of rise of the surge voltage‚ ensuring the voltage is more evenly distributed across the insulation of the winding.