Hello,
I am seeking guidance on when and where to use cable surge arresters for buried 33kV cable.
The situation is as follows:
1. The HV cable is buried for its entire length except at each end where it is fully enclosed inside a switchroom. There is no exposure to a direct lightning...
Has anyone come across a simple formula or rule of thumb for calculating the derating of cables when the same phases are grouped together? For example, I am running 3 x 400mm2 single core cables per phase from switchboard to generator. To avoid derating the cables they can be run in...
Can someone give me a crash course on problems associated with paralleled generators having a Neutral earth resistor or reactor which is oversized. Also, whats the purpose of using a reactor rather than a resistor?
