0212 640 90 96

Outdoor Three-Phase Live-Tank Vacuum Circuit Breaker (Up to 40.5kV)

Property Specification

Type: Outdoor Three-Phase Live-Tank Vacuum Circuit Breaker (Up to 40.5 kV)

Features: This outdoor vacuum circuit breaker, available with silicone-coated hydrophobic polymer or porcelain insulators, features hermetically sealed interrupting chambers engineered to withstand harsh weather, heavy pollution, seismic acceleration up to 0.6 g, and temperatures down to -40°C. It operates via a low-energy spring operating mechanism equipped with a manual charging handle, mechanical anti-pumping protection, and continuously rated self-monitoring coils. All moving parts and electrical connections are housed within a weatherproof control cabinet to maximize safety; the system also supports height-adjustable mounting frames, plug-and-play accessories, and extension brackets for instrument transformers.

Applications: Suitable for medium-voltage power distribution networks, utility substations, industrial manufacturing facilities, renewable energy generation sites such as wind and solar farms, and capacitor bank switching duties.

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Description

Technical Comparison Matrix

Technical Parameter / Feature Category Outdoor Live-Tank Vacuum Circuit Breaker Performance Specifications
Maximum Operating Voltage

• 36 kV Models: Up to 36 kV

• 40.5 kV Models: Up to 40.5 kV
Continuous Rated Current Capacity

• 36 kV Porcelain: Up to 2500 A

• 36 kV Polymer (HCEP): Up to 2000 A

• 40.5 kV Porcelain: Up to 3150 A
Short-Time Breaking Current Rating (3 s) 31.5 kA
Peak Dynamic Withstand Current 82 kAp
Symmetrical Fault Breaking Capacity 31.5 kA
Impulse Withstand Insulation Level (BIL Peak)

• 36 kV Rating: 170 kVp

• 40.5 kV Rating: 195 kVp
Dry Power-Frequency Withstand Voltage (1 min)

• 36 kV Rating: 70 kV

• 40.5 kV Rating: 95 kV
Standard Auto-Reclosing Duty Cycle

• 36 kV Variants: O – 0.3s – CO – 15s – CO

• 40.5 kV Variant: O – 0.3s – CO – 3min – CO
Mechanical and Electrical Operating Life 10,000 close-open (CO) operations at rated continuous current
High-Voltage Housing Insulation Medium Porcelain or Hydrophobic Cycloaliphatic Epoxy (HCEP) polymer
External Surface Creepage Path Length

• 36 kV Porcelain: 900 mm / 1116 mm

• 36 kV HCEP Polymer: 1116 mm

• 40.5 kV Porcelain: 900 mm / 1116 mm
Capacitive Current Switching Capacity

• Single Capacitor Bank: 400 A (36 kV) / 750 A (40.5 kV)

• Back-to-Back Capacitor Bank: 750 A (40.5 kV only)
Breaker Unit Mass (Excluding Mounting Base)

• 36 kV Porcelain: ≃ 375 kg

• 36 kV HCEP Polymer: ≃ 275 kg

• 40.5 kV Porcelain: ≃ 560 kg
Thermal Operating Ambient Range -25°C to +50°C (an extended -40°C low-temperature package is available upon request)
Rated Operating Frequency 50 Hz / 60 Hz
Optional Structural Adaptations Integrated mounting brackets for CT/VT instrument transformers; marine-grade stainless steel control enclosure and cable ducts.

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