11kV Silicone Surge Arrester
Pole mounted 11kV surge arrester with a silicone composite housing
Product Overview
A surge arrester gives lightning and switching overvoltage a path to earth before it reaches equipment insulation, then returns to its non-conducting state. At 11kV the equipment it usually protects is a pole mounted transformer, and the protective margin it delivers depends as much on how short the earth lead is as on the arrester itself.
Key Benefits
- Conducts lightning and switching surges to earth then resets
- Silicone housing resists surface tracking in polluted wet air
- Light composite construction for pole top mounting
- Ordered with the drop out fuses that protect the same position
Problems It Solves
- Transformer winding insulation failures after lightning activity
- Arresters tracking across the housing surface in polluted air
- Protective margin lost to long looping earth leads
Application Scenarios
- Protection of 11kV pole mounted transformers
- Line entry points into substations
- Cable to overhead line transition positions
- Areas with a high lightning ground flash density
Who It Is For
- Distribution utilities operating 11kV networks
- Rural electrification contractors
- EPC contractors
- Maintenance teams replacing failed arresters
Technical Features
- Silicone rubber composite housing
- Metal oxide arrester construction
- Rated at 11kV distribution class
- Pole mounted with short earth connection
Specifications
| Product Family | Silicon material |
|---|---|
| Rated Voltage | 11kV |
| Housing Material | Silicone rubber |
| Mounting | Pole mounted with short earth lead |
| Function | Surge arrester overvoltage protection |
| Dimensions and Ratings | Confirmed against your line standard at quotation |
Materials
- Silicone rubber housing
- Composite insulating core
- Arrester blocks
- Earth connection hardware
Manufacturing Process
- Block production
- Assembly of the arrester stack
- Silicone housing moulding
- Electrical check
- Packing for export
Customisation Options
- Rating confirmed against your system voltage and earthing arrangement
- Supplied with drop out fuses as a pole top protection package
- Project quantities quoted against a line schedule
Compared With Other Options
| 33kV silicone surge arrester | The same construction at the higher class. The system voltage decides. |
|---|---|
| Combi unit | Combines the arrester with a drop out fuse where one position needs both. |
| Spark gap | A gap operates and then has to recover. A metal oxide arrester conducts the surge and returns to its non-conducting state without an interruption. |
Use Guide
- Mount as close as the arrangement allows to the equipment being protected
- Keep the earth lead short and direct - the inductive drop along the lead subtracts from the protection
- Confirm the earth electrode resistance meets the design
- Inspect the housing for damage and tracking at maintenance visits
Related Products
33kV Silicone Surge Arrester
Pole mounted 33kV surge arrester with a silicone composite housing
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11kV Silicone Drop Out Fuse
Pole mounted 11kV drop out fuse with a silicone composite housing
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Earth Rod
Driven earth electrode for pole mounted equipment and substation earthing
View details →Related Guides
Porcelain or Silicone Composite Insulators How to Decide
The choice is decided by pollution, weight and handling losses rather than by price per unit.
Read guide →Drop Out Fuses and Surge Arresters on a Distribution Pole
What each device protects against and why a pole-mounted transformer normally needs both.
Read guide →11kV Silicone Surge Arrester Questions
How close to the transformer should the arrester be
As close as the arrangement permits. The protective margin is the arrester residual voltage plus the inductive drop along the connecting leads, so distance costs protection.
Does the arrester replace a fuse
No. They answer different faults - overvoltage and overcurrent - and most transformer positions need both.
What rating do I order
It depends on the system voltage and the earthing arrangement. Send both with your enquiry.
Get a Price on 11kV Silicone Surge Arrester
Send the quantity, the specification you are matching and the destination port.