Page 145 - Practical Power System and Protective Relays Commissioning
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144 Practical Power System and Protective Relays Commissioning
FIGURE 14.1 SF6 gas insulated system components.
FIGURE 14.2 Three-phase enclosure gas insulated system (GIS) and single phase enclosure GIS.
14.3 CIRCUIT BREAKERS
Similar to air insulated system CB, this device can disconnect or close the
circuit under normal and short-circuit conditions. In an SF 6 -type CB the
quenching medium of the electric arc during circuit opening is the SF 6 under
pressure. There are two types of SF 6 CB: a puffer type that is used for high
