33kV Silicone Surge Arrester
Pole mounted 33kV surge arrester with a silicone composite housing
Product Overview
The 33kV surge arrester protects equipment insulation on the higher distribution class, where the energy in a surge event and the insulation at risk are both larger. The silicone composite housing keeps the external surface out of the failure path in polluted air, and keeps the unit light enough to install at the pole top without plant.
Key Benefits
- Overvoltage protection at 33kV distribution class
- Hydrophobic silicone surface in polluted and coastal air
- Composite construction handled at height without lifting equipment
- Quoted with 33kV fuses and combi units for the same positions
Problems It Solves
- Equipment insulation damage from lightning and switching surges
- Surface tracking on arrester housings in polluted environments
- Earth arrangements that undermine the protective margin
Application Scenarios
- 33kV pole mounted transformer protection
- Overhead line entry to substations
- Transition positions between cable and overhead line
- Feeders in high lightning activity regions
Who It Is For
- Distribution network operators on 33kV systems
- EPC contractors delivering 33kV line and substation work
- Rural electrification programmes
- Utility maintenance departments
Technical Features
- Silicone rubber composite housing
- Metal oxide arrester construction
- Rated at 33kV distribution class
- Short earth lead mounting arrangement
Specifications
| Product Family | Silicon material |
|---|---|
| Rated Voltage | 33kV |
| 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
- Arrester stack assembly
- Housing moulding
- Electrical check
- Packing for export
Customisation Options
- Rating confirmed against your system voltage and earthing arrangement
- Supplied with 33kV fuses or as part of a combi unit package
- Project quantities priced against a line schedule
Compared With Other Options
| 11kV silicone surge arrester | The same construction at the lower class. Select on system voltage. |
|---|---|
| 33kV combi unit | Where the position also needs a drop out fuse, the combi unit carries both in one assembly. |
Use Guide
- Mount close to the protected equipment
- Keep the earth lead short and direct
- Verify the earth electrode resistance against the design
- Check the housing for tracking marks at each maintenance visit
Related Products
11kV Silicone Surge Arrester
Pole mounted 11kV surge arrester with a silicone composite housing
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33kV Silicone Combi Unit
Combined 33kV drop out fuse and surge arrester in one pole top unit
View details →
Earth Rod
Driven earth electrode for pole mounted equipment and substation earthing
View details →33kV Silicone Surge Arrester Questions
Can one arrester protect several items
The protective margin falls off with the lead and separation distance. Protection is specified per position rather than per feeder.
What happens after the arrester conducts a surge
A metal oxide arrester returns to its non-conducting state once the surge has passed. Repeated severe events do degrade the blocks over time, which is why housings are inspected at maintenance.
Do you supply arresters and fuses together
Yes, and it is the normal order - the same position usually needs both.
Get a Price on 33kV Silicone Surge Arrester
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