Dead Tank Circuit Breakers up to 550 kV

The 550 kV Dead Tank Circuit Breakers (DTB) can be equipped with pre-insertion resistors and are tested for high transient recovery voltage (TRV) performance, high mechanical endurance and switching capabilities. Installation time is greatly reduced due to control wire bundling.

For shunt reactor protection, Hitachi Energy offers Dead Tank Circuit Breakers with applied, internal Metal Oxide Varistors (MOVs). This solution increases the reliability of the breaker by limiting damaging overvoltage’s.

• Line, transformer, reactor and capacitor switching
• Point-on-wave switching
• High seismic applications
• High altitude applications

• Flexible design platform provides options for pre-insertion resistors and various height-to-live part configurations
• High TRV withstand for long transmission lines
• High current potential facilitates high load transmission 
• Short installation time due to factory pre-assembly 
• Widely installed base in all environments and applications
• Global service organization, local everywhere

* Single-pole operation also referred to as independent pole operation.