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SF6-free Dead Tank Circuit Breaker manufacturer-145 kV

  • SF6-free Dead Tank Circuit Breaker manufacturer-145 kV

Key attributes

Brand ROCKWILL
Series RVD
Rated voltage 145kV
Rated frequency 60Hz
Rated normal current 3000 A
Rated break time 50 ms
Rated short-circuit breaking current 63kA

Description

The RVD-145 Dead Tank Vacuum Circuit Breaker, launched by ROCKWILL, is a gas-insulated switchgear with a voltage rating of up to 145 kV. Its core features include the use of clean air as the insulation medium combined with vacuum interruption technology, aiming to achieve zero greenhouse gas emissions and zero global warming potential in power transmission.

Main Characteristics

Eco-Friendly Technology, Zero Environmental Impact:

  • Zero SF₆ and other F-gases: Completely eliminates the use of traditional SF₆, a potent greenhouse gas.
  • Zero greenhouse gas emissions: The insulation medium is clean air (80% nitrogen, 20% oxygen), which is safe and can be released directly into the atmosphere without contributing to the greenhouse effect.
  • Zero GWP: Features a Global Warming Potential of zero.

Safe and Reliable, Zero Health Risks

  • Non-toxic insulation gas: Clean air is non-toxic and harmless, ensuring operator safety.
  • No toxic decomposition products: The interruption process occurs in a vacuum, preventing the generation of harmful substances.
  • No special safety measures required during maintenance: Thanks to the inherent safety of the gas.
  • No gas disposal required at end-of-life: Simplifies the decommissioning process.

Simple Operation, Zero Regulatory Burden

  • No gas handling regulations or density checks: Eliminates the routine gas monitoring and maintenance required for SF₆ equipment.
  • No gas reporting and accounting: Complies with and exceeds current andpotential future legislation restricting F-gases.
  • No F-gas related training: Reduces training costs and complexity.

Excellent Performance, Zero Compromise

  • Proven technology: Based on over 40 years of experience in medium-voltage vacuum interruption technology and more than 10 years in high-voltage applications up to 145 kV.
  • High reliability: Delivers excellent interrupting performance at rated nominal current and rated short-circuit current without degradation.
  • Low maintenance costs: The vacuum interrupter is hermetically sealed and maintenance-free over its entire service life, resulting in low operational costs throughout the lifecycle.
  • Long service life: An expected lifetime of over 50 years and a first major inspection interval exceeding 25 years.
  • Wide applicability: Suitable for a broad ambient temperature range from -50°C to +55°C. The insulating medium carries no risk of liquefaction, making it particularly suitable for low-temperature applications. It can be installed both indoors and outdoors.

Technical specifications

Item Parameters
Rated voltage 145kV
Rated frequency 50/60Hz
Rated short‑duration power‑frequency withstand voltage (1 min) 275kV
Rated lightning impulse withstand voltage (1.2/50 us) 650kV
Rated continuous current‑ bus bar / feeder bus coupler 3150A
Rated short‑circuit breaking current 50kA
Rated peak withstand current 135kA
Rated short‑time withstand current (up to 3 s) 50kA
Leakage rate per year and gas compartment (type tested) <0.1%
Drive mechanism of circuit‑breaker stored energy spring
Rated operating sequence 0‑0.3 s‑C0‑3 min‑CO
 
C0‑15 s‑CO
interrupter technology vacuum
Insulation medium clean air
Weight of SF6 or other fluorinated green‑house gases 0 kg
Rated filling pressure 0.8 MPa (abs.)
Bay width common pole drive 1000 mm
Bay height depth (depending on bay arrangement) 3.200/5,500 mm
Bay weight (depending on bay arrangement) 6.0t
Ambient temperature range -50°C +55°C
Installation Indoor/outdoor
First major inspection > 25 years
Expected lifetime > 50 years
Standards IEC/IEEE

Drawings of RVD-145 SF6-free Dead Tank Circuit Breaker

RVD-145 SF6-free Dead Tank Circuit Breaker Drawings

Dimensions

RATED MAX. VOLTAGE 145 kV
A (in/mm) 89.2/2264
B (in/mm) 73.85/1876
C (in/mm) 122.9/3120
D (in/mm) 167.5/4254
E (in/mm) 51.83/1316
F (in/mm) 137.4/3490
G (in/mm) 65.9/1674
H (in/mm) 107.85/2739.5
I (in/mm) 97.5/2476
J (in/mm) 51.83/1316

Service environment

Air temperature Maximum temperature: +55℃;
Minimum temperature: -50℃
Humidity Daily average humidity 100%.
Above sea level Maximum installation altitude: 1000m.

Solutions for SF6-free DTCB

Documentation Resource Library SF6-free DTCB

Rockwill Electric Group Profile
Public.
Rockwill Electric Group Profile
Brochure
English

FAQ for SF6-free DTCB

Is it safe for operators?

Yes. Clean air is non-toxic and harmless. The vacuum interruption process produces no toxic decomposition products. No special safety measures are required during maintenance.

What is the environmental impact?

Zero greenhouse gas emissions and zero GWP (Global Warming Potential). Significantly exceeds current and future F-gas regulations.

Is it truly SF₆-free?

Yes. Zero SF₆ and zero F-gases. The insulation medium is clean air, which is non-toxic, safe, and can be released directly into the atmosphere without contributing to the greenhouse effect.

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