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Air-insulated circuit breaker 3AP DCB series
SF6 gas-insulatedsingle-pole2-pole

air-insulated circuit breaker
air-insulated circuit breaker
air-insulated circuit breaker
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air-insulated, SF6 gas-insulated
Number of poles
single-pole, 2-pole
Other characteristics
Primary current

3,150 A, 4,000 A


145 kV, 420 kV


Siemens has developed a device in which the isolating distance has been integrated in the SF6 gas compartment in order to reduce external environmental influences. The DCB (disconnecting circuit breaker) is used as a circuit breaker and also as a disconnector – two functions combined in one device. An additional air-insulated earthing switch can be mounted onto the supporting structure for voltages up to 145 kV. Overview of our disconnecting circuit breakers (DCB) Our DCB combines the strengths of our proven product portfolio. This innovative device saves space and cuts costs while offering the highest reliability and safety. Main features: •Combination of circuit breaker and disconnector in one device •No visible opening distance due to the SF6-insulated disconnector function •Compact mechanical interlock which guarantees that the circuit breaker stays in the open position when used as a disconnector •Position indicators for monitoring •Optional air-insulated earthing switch (up to 145 kV) Advantages: •Highest reliability by applying well-proven and established components from Siemens circuit breakers and earthing switches •Highest availability due to reduced maintenance interruptions •Cost- and space-saving solution by combining two devices into one •Minimized costs for transportation, maintenance, installation and commissioning, as well as civil engineering work •Compact and intelligent interlocking and position indicating device for greater safety •From a single source: documentation and technical support, assembly and installation, customer training, 24-hour service
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.