| See | 26 12 00 for medium-voltage facility transformers. 26 13 00 for medium-voltage switchgear. 26 16 00 for medium-voltage metering. 26 18 00 for medium-voltage protection devices. 26 22 00 for low-voltage facility transformers. 33 72 00 for utility substations. 33 75 00 for high-voltage switchgear. 33 77 00 for medium-voltage utility switchgear. 34 21 23 for traction power transformer-rectifier units. 48 19 23 for electrical power generation transformers. |