Complete transformer substations rating 250, 400, 630, 1000 kV∙А for voltage 6 or 10 kV on the HV side and 0.4 kV on the LV side, are assigned for reception, transformation and distribution of electric power with frequency 50 Hz in one-two radial and loop urban networks in regions with temporary climate (from -45С tо +40С).

Uprated Complete Transformer Substation (here and then – КТПГСМ) rating from 100 to 630 kVА for voltage 6 or 10 kV on the HV side and 0.4 kV on the LV side, frequency 50 Hz are assigned for reception, transformation and distribution of electric power with radial (double-radial) and loop urban networks in regions with temporary climate (temperature between -45С tо +40С).