Dead-tank circuit breaker 3AP1 DT

SF6 gas-insulatedshort-circuithigh-voltage

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