12kV Epoxy Embedded Pole for Vacuum Circuit Breaker

Product Details: The 12kV Epoxy Embedded Pole is a high-performance insulation component designed for medium-voltage switchgear. Utilizing advanced solid-sealing technology, it integrates the vacuum interrupter with epoxy resin through a one-shot molding process, significantly enhancing mechanical strength and environmental resistance. With a rated voltage of 12kV, current capacity up to 1250A, and short-circuit breaking capability of 25kA/31.5kA, this product meets rigorous power system requirements. Key features include ultra-low partial discharge (≤5pC), extended mechanical lifespan (10,000 operations), and a 20-year storage period, ensuring long-term reliability. Compatible vacuum switches are precisely matched, featuring a contact gap of 9±1mm, controllable opening/closing speeds, and contact pressure up to 3200N, which optimize operational stability and arc management. Ideal for grid upgrades, industrial distribution, and renewable energy applications, it delivers superior performance in diverse electrical environments.

Technical Specifications: Type：PT-EP-12/630A-25ka、PT-EP-12/630A-31.5ka、PT-EP-12/1250A-25ka、PT-EP-12/1250A-31.5ka
Rated Voltage: 12KV
Rated Current: 630A / 1250A / 1600A / 2500A / 3150A / 4000A
Rated Frequency: 50Hz
Rated Short-Circuit Breaking Current: 25KA / 31.5KA / 40kA
Rated Short-Circuit Breaking Operations: 30 Times
Rated Short-Circuit Making Current: 63KA / 80kA
Rated Peak Withstand Current: 63KA / 80kA
Rated Short-Time Withstand Current (4s): 25KA / 31.5KA / 40kA
Rated Single Capacitor Bank Breaking Current: 630A
Rated Back-to-Back Capacitor Bank Breaking Current: 400A
Short-Time (1min) Power Frequency Withstand Voltage: 48KV
Lightning Impulse Withstand Voltage (Peak): 85KV
Circuit Resistance under Rated Contact Pressure: ≤25～30Ω
Mechanical Life: 10000 Times
Contact Self-closing Force: 110±60N / 210±60N
Contact Reaction Force at Rated Opening Distance: 180±50N / 300±50N
Permissible Contact Wear Thickness: 3mm
Storage Period: 20 Years
Partial Discharge: ≤5pC
Rated Operating Sequence: O-0.3s-CO-180s-CO

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