Solidly Sealed Pole
Product Overview
This model of vacuum arc-extinguishing chamber with a hermetically sealed pole features a liquid silicone buffer layer, copper–chromium contact material, a cup-shaped longitudinal magnetic field structure, and an epoxy resin insulating housing. The product boasts a compact footprint, high breaking capacity, and superior insulation performance. It is designed to be paired with corresponding indoor and outdoor vacuum circuit breakers or vacuum switchgear and is particularly well suited for applications in power, machinery, metallurgy, chemical, mining, and other industrial sectors where circuits are frequently operated under full-load conditions.
Working conditions
● Ambient temperature: -45°C to +40°C
● Humidity: maximum daily average 95%, maximum monthly average 90%
● Altitude: not exceeding 1,000 meters
● Maximum daily average temperature: +35℃
● Maximum seismic intensity: Grade 8
● Install in locations free from fire hazards, explosion risks, and severe vibration.
Implementation Standard
GB311.1, GB/T7354, GB/T3906
Technical Specifications
Rated voltage |
12kV |
Rated current |
1250A |
Rated frequency |
50HZ |
Rated short-circuit breaking current |
31.5kA |
Rated short-circuit making current (peak) |
80kA |
Rated peak withstand current |
80kA |
Rated short-time withstand current (4 s) |
31.5kA |
Rated breaking current of a single capacitor bank |
630A |
Rated back-to-back capacitor bank breaking current |
400A |
Short-time (1 min) power-frequency withstand voltage |
48kV |
Lightning impulse withstand voltage |
85kV |
Loop resistance at the lower limit of rated contact pressure |
≤25 μΩ |
Rated short-circuit breaking current breaking operations |
50 times |
Mechanical life |
30,000 times |
Contact self-closing force |
120±50 N |
Contact return force |
210±50 N |
Allowable wear thickness of the contact |
3mm |
Shelf life |
20 years |
Partial discharge quantity |
≤5pC |
Rated Operating Procedure |
0-0.3s-CO-180s-CO |
Mechanical parameters that the accompanying vacuum switchgear shall meet |
|
Contact opening distance |
9±1mm |
Contact travel |
3.5±1mm |
Average tripping speed |
1.1±0.2 m/s |
Average closing speed |
0.7±0.2 m/s |
Rated Contact Pressure |
3100±200 N |
Contact closing bounce time |
≤2mS |
Out-of-phase closing and opening of contacts |
≤1mS |
Opening contact bounce amplitude |
≤2mm |
Outline Dimension Drawing (mm)
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Contact Us
0411-83167110
No. 95, West Section of Shiji Road, Pulandian District, Dalian City, Liaoning Province
Leave a message to get a product quote.
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