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Dead-tank circuit breaker 3AP1 DT
SF6 gas-insulatedshort-circuithigh-voltage

dead-tank circuit breaker
dead-tank circuit breaker
dead-tank circuit breaker
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SF6 gas-insulated, dead-tank
Electrical characteristics
short-circuit, high-voltage, high-voltage
Other characteristics
compact, outdoor
Primary current

3,150 A


Max.: 550 kV

Min.: 72.5 kV

230 kV, 325 kV, 550 kV, 750 kV


We offer dead tank circuit breakers for applications from 72.5 kV to 550 kV with a service life of up to 50 years. Our DT circuit breakers deliver the greatest possible reliability – even in extreme environmental conditions across the globe. Features & advantages • Toroidal-core current transformers on bushings (compact construction) • High short-circuit breaking currents possible (up to 90 kA with one interrupter unit) • Low center of gravity of the bases leads to higher seismic withstand capability up to 0.5 g • Available with porcelain or composite insulators • Suitable for temperatures from -60 to 55°C with mixed gas solutions or various heating systems • Suitable for altitudes of up to 1,000 meters • Gas leakage rate of less than 0.1 % per year • Inspection after 12 and maintenance after 25 years • 10,000 switching operations are guaranteed • Product life time of up to 50 years • Easy installation and commissioning: only few assemblies • Installation, commissioning, maintenance, training and technical advice from a single source • Guaranteed availability of spare parts for all Siemens Energy circuit breakers for a minimum of 25 years after delivery
*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.