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NEMA C57.12.10 - Transformers - 230 kV and Below 833 / 958 through 8333 / 10 417 kVA, Single-Phase, and 750 / 862 through 60 000 / 80 000 / 100 000 kVA, Three-Phase Without Load Tap Changing; and 3750 / 4687 through 60 000 / 80 000 / 100 000 kVA with Load Tap Changing - Safety Requirements
January 1, 1997 - NEMA

This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of 60-Hz, two-winding, liquid-immersed transformers rated as follows, and used for stepdown or step-up purposes: a) 833/958 through 8333/10 417 kVA,...

MIL-PRF-27/290 - TRANSFORMER, AUDIO FREQUENCY
March 17, 2017 - NPFC
A description is not available for this item.
NEMA 260 - Safety Labels for Pad-Mounted Switchgear and Transformers Sited in Public Areas
January 1, 1996 - NEMA

These labels are for use on pad-mounted switchgear and transformers sited in public areas, such as utility easements adjacent to residential properties, shopping centers, schools, etc. They may also be used for such equipment sited in utility or industrial properties which are not normally...

MIL-PRF-27/103 - TRANSFORMER, AUDIO FREQUENCY
November 1, 2016 - NPFC
A description is not available for this item.
MIL-PRF-27/165 - TRANSFORMER AUDIO FREQUENCY
November 1, 2016 - NPFC
A description is not available for this item.
MIL-PRF-27/134 - TRANSFORMER, POWER, STEP-DOWN
November 1, 2016 - NPFC
A description is not available for this item.
MIL-PRF-27/157 - TRANSFORMER POWER, STEPDOWN
November 1, 2016 - NPFC
A description is not available for this item.
MIL-PRF-27/33 - TRANSFORMER, POWER, STEP-UP
February 2, 2016 - NPFC
A description is not available for this item.
NEMA PE 5 - Utility Type Battery Chargers
January 1, 1997 - NEMA

This Standards Publication covers stabilized constant-potential-type filtered or unfiltered battery chargers which are designed to supply direct-current power from an alternating-current source to charge a float-type battery and simultaneously power the connected utility system load. These battery...

NEMA EI 21.2 - Instrument Transformers for Revenue Metering (125 kV BIL Through 350 kV BIL)
January 1, 1991 - NEMA

These standards cover general requirements, ratings, accuracy classifications, burdens and pertinent dimensions applicable to instrument current and voltage transformers for revenue metering rated 125 kV BIL through 350 kV BIL. The values stated in U.S. customary units shall be regarded as...

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