Dead Tank Circuit Breakers : DT1-38 Dead Tank Circuit Breaker for 38 kV

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DT1-38

Dead Tank Circuit Breaker for 38 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 DT1-38 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 DT1-38 can be readied for standard container shipment as a fully assembled unit.

GE Advantage

Performance

Specifications

Drawings

Performance

Thanks to its robust design, the DT1-38 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.

Quality components play a key role in the high performance of the unit. DT1-38 components include:

Third-generation self-blast interrupter chamber
Pressure relief system for passive protection of both substation and personnel
Generous space for current transformers
Field-proven, temperature-compensated density monitor with two-stage pressure switch and three-color dial
DILO SF₆ filling connection
Galvanized steel base frame
Reliable spring-spring-operated mechanism

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 valtage	Rated voltage	38	kV
Rated power frequency	Rated frequency	50/60	Hz
Rated dielectric withstand capability: - dry withstand - wet withstand	Rated insulation level - at power frequency,dry - at power frequency,wet	80 75	kV kV
Rated lightning impulse withstand voltage	- at lightning impulse	200*	kV
Rated chopped wave impulse voltage 2us		258	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		104	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