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Product overview

Dead tank compact (DTC) overview

The dead tank compact (DTC) circuit breaker for 145 kV and 245 kV applications is a compact arrangement of several functions needed in a substation. The hybrid concept combines SF6-encapsulated components and air-insulated components. It is possible to arrange the components in a variety of ways depending on your substation configuration.

Possible components for the 3AP1 DTC compact switchgear: 1. Bushing; 2. Current transformer; 3. Circuit breaker with self-compression principle; 4. Three-position disconnector/earthing switch; 5. Voltage transformer; 6. Cable connection assembly; 7. High-speed earthing switch

Flexible solutions according to your substation configuration

  • Circuit breaker with single- or three-pole operating mechanism
  • Disconnector, earthing switch, high-speed earthing switch
  • Current transformer, voltage transformer and voltage detection system
  • Cable connections possible at various positions
  • Bushings available as porcelain or composite insulators
  • Additional separation of gas compartment, with SF6 density monitor on request
  • Double breaker modules for ultra-compact substation designs
  • Possibility for stand-alone components, e.g. disconnector module with voltage transformer


  • Flexibility in confined spaces and extreme environmental conditions, e.g. low-temperature applications
  • Gas-insulated components ensure the highest availability at minimum maintenance effort
  • Optimized investments according to the requirements of your individual substation layout
  • Gas-insulated components ensure increased availability and safety
  • Minimum design work required for various applications thanks to predefined modules

Our dead tank compact circuit breaker family


Based on our modular design, the core components are adopted from our high-voltage circuit breakers, disconnectors and the GIS product family. Our dead tank compact circuit breakers have a three-pole operating mechanism with a common base, or single-pole operating mechanism on separate bases.

Technical data

All values in accordance with IEC, other values on request.

Downloads, support and services

Our services for you

You can find details on our dead tank compact circuit breakers and information about our services here.