Comitato Elettrotecnico Italiano

Series capacitors for power systems Part 2: Protective equipment for series capacitor banks
 N EN 60143-2

Annotation

This part of IEC 60143 covers protective equipment for series capacitor banks, with a size larger than 10 Mvar per phase. Protective equipment is defined as the main circuit apparatus and ancillary equipment, which are part of a series capacitor installation, but which are external to the capacitor part itself. The recommendations for the capacitor part are given in IEC 60143-1:2004. The protective equipment is mentioned in Clause 3 and 10.6 of IEC 60143-1:2004.

The protective equipment, treated in this standard, comprises the following items listed below:

– overvoltage protector,

– protective spark gap,

– varistor,

– bypass switch,

– disconnectors and earthing switches,

– discharge current-limiting and damping equipment,

– voltage transformer,

– current sensors,

– coupling capacitor,

– signal column,

– fibre optical platform links,

– relay protection, control equipment and platform-to-ground communication equipment. See Figure 1.

Principles involved in the application and operation of series capacitors are given in Clause 5.