Houston-based. Powering projects nationwide. 24/7 support (713) 281-5735
Let’s talk power
Equipment/High-voltage breakers

GRID PROTECTION

High-voltage circuit breakers

DTCB dead-tank circuit breakers, designed for reliable, long-term performance in transmission and substation environments up to 550 kV.

31.5–63 kAWITHSTAND CURRENT
Up to 550 kVVOLTAGE
Request a quote
Built to IEC 62271-100
and IEEE C37
High-voltage dead tank circuit breaker in outdoor utility substation BUILT AROUND YOUR SPECIFICATION

THE RIGHT EQUIPMENT

Protection you can build around.

Each DTCB breaker uses proven gas-insulated interrupter technology for dependable switching under the most demanding operating conditions. The line is built for high mechanical endurance, low maintenance, and exceptional dielectric strength in outdoor environments.

BUILT FOR THE LONG HAUL

Typical lead time5 mo
Maintenance intervalUp to 15 yrs

Ideally suited for transmission substations, renewable energy integration, and expansion of the high-voltage grid. Maintenance interval is based on normal service conditions.

Application-specific technical review Strict quality control at every production stage Warranty covering materials & workmanship U.S.-based service, technical & warranty support Top-tier quality without the premium price tag

BY VOLTAGE CLASS

Technical ratings

Rated voltageRated currentShort-time withstandTemperature range
38 kVUp to 2,500 AUp to 31.5 kA-22°F to 131°F
72.5 kVUp to 4,000 AUp to 40 kA-22°F to 131°F
145 kVUp to 3,150 AUp to 63 kA-22°F to 131°F
245 kVUp to 4,000 AUp to 63 kA-18.4°F to 131°F
362 kVUp to 4,000 AUp to 50 kA-13°F to 131°F
550 kVUp to 6,300 AUp to 63 kA-22°F to 131°F

Final ratings, accessories, and delivery are confirmed for your project.

DTCB SERIES

Specifications

Key features
  • Puffer-type interrupterEfficient arc control and reduced energy consumption
  • Maintenance interval up to 15 yearsUnder normal service conditions
  • Fully type-testedTo international standards for performance and reliability
  • Three-phase or monopoleThree-phase up to 252 kV; monopole above 252 kV
  • Compact designSimplified installation and field service
  • Rugged constructionFor wide temperature ranges and outdoor exposure
Electrical & mechanical characteristics
  • Rated frequency60 Hz (50 Hz available on request)
  • Interruption methodSingle-pressure SF₆ self-blast puffer system
  • Operating sequenceO–0.3s–CO–3min–CO
  • Insulation mediumSF₆ gas, hermetically sealed tank
  • MechanismSpring or pneumatic, based on voltage class
  • ApplicationsTransformer and line switching, substation protection, and grid interconnection
Design & standards
Built to meet or exceed IEC 62271-100 and IEEE C37 standards. A sealed SF₆ gas-insulated dead-tank housing provides exceptional dielectric strength and long-term reliability, and each mechanism is engineered for low operating energy and high mechanical endurance throughout its service life.
Manufacturing & testing
Each unit undergoes strict quality control and functional testing to ensure performance under severe environmental and electrical conditions. Typical lead time is 5 months, depending on configuration and project requirements.

START YOUR SPECIFICATION

Let’s find
your fit.

Tell us the capacity, voltage, and timeline you need. Our team can help fill in the gaps.

(713) 281-5735 All equipment

Tell us about your project.

Start with what you know. We’ll help with the details.

By submitting, you agree to be contacted about this inquiry. Privacy policy.