These can be of two types: terminal with transformer and transit with one or two transformers. Terminal with transformer should be of strength from 100 to 400 kilowatts; transit with one transformer bears up to 1000 kilowatts, while the same type but with two transformers bears up to 10000 kilowatts in each. Uniswitch, Shneider or ZWAE commutative devices of 10n kilowatts, distributional appliance of 0.4 kilowatts – automatic switches up to 2500 amperes, switch-cutout units with cutouts up to 630 amperes (which might be joined in parallel connection; the required quantity is up to 3 units); accounting on high and low end, data reading, remote gear control, signal, RTU.