Dead Tank Circuit Breaker for 72.5 kV
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.
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.
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.
|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
|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
|*Standard values: further data is available on request.
**Please contact Grid Solutions for special purpose, high TRV, high X/R or other ratings requirements.