Instrument Transformers for Revenue Metering (110 kV BIL and Less)
NEMA EI 21.1-1993 (R2002) [BUY]
Covers general requirements, ratings, accuracy classifications, burdens and pertinent dimensions applicable to instrument current and voltage transformers for revenue metering rated 110 kV BIL and less.
Published Date: Oct.26.2004
NEMA EI 21.1-1993 (R2002)