DIN 43454-4:1999-06

The document applies to three-pole circuit-breakers with a rated voltage of 245 kV according to DIN VDE 0670-101 to -106 and -108 with a separate support frame for each pole. The support frames may be part of the delivery of devices if agreed between manufacturer and purchaser. The document does not apply to circuit-breakers of the same or similar design with one support frame for all poles. In this case see DIN 43454-2.