GB50227-2008并联电容器装置设计规范(英文版)
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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.