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Figure 11.12 One-line diagram of a star-connected reactor system for reducing the fault level at the switchgear
in the system.
Figure 11.13 One-line diagram of a delta-connected reactor system for reducing the fault level at the switchgear
in the system.
only using three circuit breakers in the existing switchgear, whereas the delta system needs six. This
economises the modification of the existing switchgear in terms of cost and space, however, the star
system requires a new but small switchboard for the common connections. This new switchboard
could be fitted with load break switches instead of circuit breakers, with protection being given by
the circuit breaker in the existing switchgear.
