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DT1-72.5
Dead Tank Circuit Breaker for 72.5 kV
State-of-the-Art Technology

GE's DT series of dead tank circuit breakers are known for their advanced self-blast interrupters, leak resistant cast aluminum enclosures and durable low energy spring operated mechanisms. More than 100,000 GE circuit breakers with self-blast interrupters and FK spring-operated mechanisms have been in service since 1989.

Flexibility for New and Retrofit Applications

The compact DT1-72.5 design can be used in new or retrofit applications. The 3-pole circuit breaker forms a complete, fully assembled, factory-tested, transportable unit. The on-site installation requires only a few simple steps. For installations where truck shipment is impossible, the DT1-72.5 can be readied for standard container shipment as a fully assembled unit.

GE Advantage
Performance
Specifications
Drawings

Learn about GE’s advantages in dead tank circuit breaker technology

Performance

Thanks to its robust design, the DT1-72.5 is a highly reliable circuit breaker even under the most severe operating conditions and is tested to meet or exceed IEEE/ANSI and IEC as C2 class for capacitance switching including back-to-back (low restrike probability) and reactor switching applications. Extensive mechanical operation design testing ensures trouble-free operation for the lifetime of the circuit breaker. Intensive production leak testing ensures superior in-service SF6 performance.

Certified Quality

GE designs, manufactures, tests and delivers its circuit breakers in accordance with IEEE/ANSI and IEC standards, maintaining a quality assurance system according to ISO-9001 and ISO-14001. The competence center for dead tank circuit breakers is located in Charleroi, PA, USA.

Specifications

IEEE/ANSI IEC Value Units
Rated maximum voltage Rated voltage 72.5 kV
Rated power freouency Rated frequency 50/60 Hz
Rated dielectric withstand capability:
- dry withstand
- wet withstand
Rated insulation level
- at power frequency,dry
- at power frequency,wet

160
140

kV
kV
Rated lightning impulse withstand voltage - at lightning impulse 350 kV
Rated chopped wave impulse voltage 2us/3us   452/402 kV
Rated continuous current Rated normal current 1,200/2,000/3,000 A
Rated short-circuit current Rated short-circuit breaking current 40 kA
Rated closing,latching and short time carrying current   108 kA
  Rated short-circuit making current 100 kA
Rated capacitance switching   630 A
  Rated single capacitor bank breaking current 1,200 A
Rated interrupting time   3 cycles
  Rated break time 50 ms
Rated standard operating duty Rated operating sequence O-CO-15s-CO
O-0.3s-CO-180s-CO
*Standard values: further data is available on request.
**Please contact Grid Solutions for special purpose, high TRV, high X/R or other ratings requirements.

Drawings

DT1-38