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