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.

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.

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/ANSIIECValueUnits
Rated maximum voltageRated voltage72.5kV
Rated power freouencyRated frequency50/60Hz
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 impulse350kV
Rated chopped wave impulse voltage 2us/3us 452/402kV
Rated continuous currentRated normal current1,200/2,000/3,000A
Rated short-circuit currentRated short-circuit breaking current40kA
Rated closing,latching and short time carrying current 108kA
 Rated short-circuit making current100kA
Rated capacitance switching 630A
 Rated single capacitor bank breaking current1,200A
Rated interrupting time 3cycles
 Rated break time50ms
Rated standard operating dutyRated operating sequenceO-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

DT1-72.5

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