BS IEC 60076-21:2018 describes electrical, mechanical and test requirements of liquid-immersed, single- and three-phase, 50 Hz and 60 Hz, self and forced-air cooled, distribution, overhead and substation, step-voltage regulators, 1 000 kVA (single-phase units) or 3 000 kVA (threephase units) and smaller, 34 500 volts and below (2 400 V minimum) and their associated controls.


Cross References:
IEEE C57.12.31
IEEE 4
SAE AS50151
IEEE C57.19.00
IEEE C37.90.2
IEC 60255-21-1
IEEE C37.90.3
IEC 60255-27
IEEE C37.90 .1
IEC 60076-2
IEC 60060
IEC 60255-26
IEC 60050-421
IEEE C57.91
IEC 61672-1
IEC 60255-1
ASTM D3487
IEC 60214-2
IEEE C57.131
IEC 60076-1
NEMA 250:2003
IEC 60529
IEC 60076-5
IEEE C57.13
IEEE C57.12.90
IEEE C57.12.20
ASTM D117
IEEE C57.153
IEC 60214-1
IEEE 315
ANSI C84.1
IEC 60076-10
IEEE C57.12.80
IEEE C57.12.00
ASTM F1883 - 03
IEEE C57.106
IEEE 62
IEC 60076-4
IEC 60076-3
IEC 60076-7
ANSI S1.4
IEEE C57.104
IEEE C57.98
ISO 9614-1:1993
ISO 9614-2:1996


All current amendments available at time of purchase are included with the purchase of this document.