English English
Home > News > Industry News
Industry News

Cold shrink cable accessories special Silicone grease

2023-03-28
The silicone grease used in cold shrinkable cable accessories is a kind of insulating lubricating silicone grease made by special process by modifying silicone oil, ultra-pure insulating filler and adding functional additives. This high voltage insulating grease has excellent high voltage resistance, waterproof, anti-creepage performance. It is designed for the insulation, sealing lubrication and moisture-proof of high voltage cable joints and cable accessories of high voltage electrical equipment above 10kv. It can prevent electrochemical corrosion, make the line contact well, and reduce the aging of material surface caused by unstable climate. Applicable temperature range -40 ~ +200℃.

Cold shrinkable cable accessories silicone grease requirements are the most important filling insulation effect for a long time.
 To measure whether the silicone grease of cable accessories can achieve long-term and stable protection of the operation life of cable accessories is mainly from two aspects: electrical performance and grease performance, which is also the two main aspects of evaluating the silicone grease of cold shrink cable accessories.

Partial discharge (PD) is the most important factor that endangers the safe operating life of cable accessories, because the electric charge impinges on the insulating material under the alternating electric field and accelerates its aging. Discharge generates heat accumulation, which leads to insulation deterioration and breakdown for a long time; It is difficult to test the local discharge performance of cable accessories in field tests. This is also one of the reasons why cable accessories can pass the handover test, but break down after running for a period of time.

The discharge gap in cable accessories generally includes interface air gap and internal air gap.

Interfacial air gap: knife marks left by installation, bumps and bumps on the surface of insulating materials and steps of semi-conductive layer.


Internal air gap: material defects, layered free interface of stress cone structure and internal discharge gap and effective control of electric field strength.

Cold shrinkable cable accessories special silicone grease detection items include volume resistivity, dielectric loss factors, cone penetration, volatile components, steel mesh oil, corrosion, voltage breakdown strength, etc.
Excellent electrical insulation and chemical stability, especially low volatility and oil content; Cold shrinkable cable accessories silicone grease has excellent sealing, and metal, ceramic, rubber, plastic, sealant good compatibility; Excellent water resistance, non-toxic tasteless, ozone resistance, weathering resistance, weak acid and weak base resistance; Good high and low temperature, can be used in a wide temperature range for a long time, very long service life.
cold shrinkable cable accessories

Previous:

The material of the Cold shrinkable tube

Next:

Material for power cable jacket
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies. Privacy Policy
Reject Accept