Page 137 - Practical Power System and Protective Relays Commissioning
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136 Practical Power System and Protective Relays Commissioning
FIGURE 12.5 Hook-stick operated disconnect switch.
FIGURE 12.6 Pantograph disconnect switch.
12.1.2 High-Speed Earthing Switches
High-speed ES are used to discharge the high voltage cables from the capaci-
tive charging current. This current is very dangerous for the personnel work-
ing at the high-voltage cable end at a substation, paticularly if they are
outdoors.
