Dead Tank Circuit Breakers | High-Voltage Power Protection & Switching

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Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$153842.99

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$152090.22

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$233529.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Floor Mounted

$160272.38

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Frame Mounted - Elevation 5773 ft

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Frame Mounted - Elevation 5773 ft

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 115000V AC, 3-Pole, Skid Mounted

$183842.99

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$169329.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$135491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$189329.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$155705.71

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$163491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$169329.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$169329.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$173529.96

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$135491.00

Dead Tank SF6 Circuit Breaker, 1200 Amp, 138000V AC, 3-Pole, Floor Mounted

$259329.96

What Are Dead Tank Circuit Breakers?

Dead tank circuit breakers are high-voltage switching devices used to interrupt fault currents and safely isolate power systems. Characterized by their metal-enclosed grounded (dead) tank housing, these breakers provide reliable protection, minimal maintenance, and high interrupting capacity for utility, industrial, and critical power applications.

How Dead Tank Circuit Breakers Work

Dead tank breakers use an insulated interrupting chamber within a grounded tank to open or close electrical circuits under normal and fault conditions. When a fault is detected by protective relays, the breaker interrupts the current flow, extinguishes the arc in the interrupting medium (air, SF₆, or vacuum), and isolates the faulty segment — all while maintaining safety and system stability.

Applications for Dead Tank Circuit Breakers

Utility substations and transmission lines
Medium- and high-voltage distribution systems
Industrial power plants and process facilities
Renewable energy generation sites
Critical infrastructure and data centers

Key Features & Benefits

High Interrupting Capacity: Designed to safely clear high fault currents in transmission and distribution networks
Grounded Tank Safety: Metal housing provides enhanced safety and simplified installation
Long Service Life: Rugged construction supports low maintenance and high reliability
Precision Mechanisms: Fast, repeatable operation minimizes strain on power systems
Environmental Options: Available with air, SF₆, or vacuum interrupting mediums

Types of Dead Tank Circuit Breakers

Type	Description	Common Use
Air Circuit Breakers	Uses air as the interrupting medium with robust mechanisms	Medium voltage distribution
SF₆ Circuit Breakers	SF₆ gas filled for high insulation and interruption	High-voltage transmission
Vacuum Circuit Breakers	Vacuum interrupters for fast arc quenching	Industrial and utility applications

Important Specifications to Consider

Rated Voltage: Maximum system voltage the breaker can handle
Interrupting Rating: Maximum fault current the breaker can safely interrupt
Frequency: Typically 50/60 Hz system compatibility
Insulation Medium: Air, SF₆, or vacuum options depending on application
Operating Mechanism: Speed and reliability of opening/closing functions
Standards Compliance: IEEE, IEC, or other regional standards

Why Dead Tank Breakers Matter

Dead tank circuit breakers are essential in power systems where fast, reliable interruption of fault currents is required. Their grounded metal enclosure improves safety, reduces installation complexity, and protects internal components. By quickly isolating faults, dead tank breakers help maintain system stability, safeguard equipment, and minimize downtime across transmission and distribution networks.

Why Choose Larson Electronics?

Larson Electronics supplies dead tank circuit breakers engineered for durability, performance, and long-term reliability in demanding power environments. Our solutions are selected for utility, industrial, and critical infrastructure applications where dependable interruption and protection are essential. With responsive technical support and fast quoting, Larson Electronics helps ensure your power system meets performance, safety, and operational goals.

For more information or assistance selecting the right breaker for your application, contact Larson Electronics. Larson Electronics – Building Trust Since 1973.