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NEMA ANSI C93.1:1999
Power-line carrier coupling capacitors and coupling capacitor voltage transformers (ccvt)
Applies to capacitors for coupling power-line carriers and for reducing rate of rise of breaker transient recovery voltage, and to CCVTs for connection to a high voltage power circuit, between line and ground, to supply a low voltage for measurement, control and protective functions.
NEMA: National Electrical Manufacturers Association [nema]