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2.3 Codes
C——capacitors;
1C,2C,3C——number of sub-bank circuit of a shunt capacitor installation;
Cl,C2,Cn——number of a capacitor unit;
FU——fuses;
FV——surge arrestors;
HL——indicating lamps;
ΔI——bridge differential current;
Io——neutral unbalance current;
KA——thermal relays;
KM——AC contactors;
L——series-connected reactors or current-limiting coils;
QF——circuit breakers;
QG——earthing switches;
QS——disconnectors or knife switches
TA——current transformers;
TV——discharge coils;
ΔU——phase unbalance voltage;
U0——open delta voltage.