Solid-insulation Embedded Pole
20 April, 2026
The Ultimate Maintenance-Free Technology for 12kV-40.5kV VCBs
Engineered with advanced APG Technology. We encapsulate the Vacuum Interrupter and conductive circuit into high-grade epoxy resin, delivering superior dielectric strength and complete immunity to dust, moisture, and condensation.
Eliminate the risks of traditional assembled poles. See the engineering difference.
We apply a flexible LSR (Liquid Silicone Rubber) buffer layer between the ceramic VI and the epoxy resin. This absorbs the thermal expansion mismatch, effectively preventing resin cracking during extreme temperature cycles (-40°C to +125°C).
Our automated pressure gelation process ensures zero internal voids. This results in ultra-low Partial Discharge (≤ 5pC), guaranteeing the longevity of the insulation system.
| 12kV Embedded Pole Specs | |
|---|---|
| Rated Voltage | 12 kV |
| Rated Current | 630A - 4000A |
| Lightning Impulse Withstand (BIL) | 75 kV / 85 kV |
| Partial Discharge | ≤ 5pC |
| Mechanical Life | 30,000 Operations |
| 24kV Embedded Pole Specs | |
|---|---|
| Rated Voltage | 24kV |
| Rated Current | 630A - 3150A |
| Lightning Impulse Withstand (BIL) | 125 kV |
| Partial Discharge | ≤ 5pC |
| Mechanical Life | 20,000 Operations |
| 40.5kV Embedded Pole Specs | |
|---|---|
| Rated Voltage | 40.5 kV |
| Rated Current | 1250A - 3150A |
| Lightning Impulse Withstand (BIL) | 185 kV |
| Partial Discharge | ≤ 10pC |
| Mechanical Life | 20,000 Operations |
Ensuring the VI is perfectly centered and the resin body is free of any internal micro-cracks.
Rigorous -40°C to +125°C thermal shock tests to verify the reliability of the silicone buffer layer.
Rigorous -40°C to +125°C thermal shock tests to verify the reliability of the silicone buffer layer.
Yes, but it depends on the mechanism interface. We offer customizable connecting arms and adaptors to fit your existing VS1 or VD4 type mechanisms perfectly.
Our poles are designed for a service life of over 30 years, or up to the mechanical life limit of the internal Vacuum Interrupter (typically 30,000 operations).
We utilize a specialized Flexible LSR (Liquid Silicone Rubber) buffer layer between the ceramic bottle and the epoxy. This layer absorbs thermal stress caused by different expansion rates.
From standard VS1 replacements to custom-designed poles for harsh environments, our engineering team is ready to deliver.
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We supply complete medium & high voltage solutions, including:
• Air Insulation Series
• Gas Insulation Series
• Switching Devices
• Instrument Transformers
