33kV Silicone Drop Out Fuse
Pole mounted 33kV drop out fuse with a silicone composite housing
Product Overview
The 33kV drop out fuse does the same job as its 11kV counterpart at the higher distribution class: it clears a downstream fault and leaves a visible open carrier. At 33kV the creepage requirement is longer, which is exactly where a hydrophobic silicone surface earns its place - more surface to keep dry means more surface for a wet pollution film to bridge.
Key Benefits
- 33kV fault isolation with visible indication from ground level
- Silicone surface holds dry bands across the longer 33kV creepage path
- Lighter than the porcelain equivalent at the same class
- Survives handling and transport impact without shattering
Problems It Solves
- Flashover across a long creepage path in wet polluted conditions
- Pole top handling weight at the higher voltage class
- Slow fault location on long 33kV spurs
Application Scenarios
- Protection of 33kV pole mounted equipment
- Sectionalising 33kV distribution feeders
- Rural 33kV spur protection
- Upgrading feeders with repeated pollution flashover history
Who It Is For
- Distribution network operators running 33kV feeders
- EPC contractors on 33kV line projects
- Rural electrification programmes
- Utility maintenance departments
Technical Features
- Silicone rubber composite housing
- Drop open carrier with visible indication
- Rated at 33kV for distribution feeders
- Pole mounted arrangement
Specifications
| Product Family | Silicon material |
|---|---|
| Rated Voltage | 33kV |
| Housing Material | Silicone rubber |
| Indication | Visible drop open carrier |
| Function | Drop out fuse protection |
| Dimensions and Ratings | Confirmed against your line standard at quotation |
Materials
- Silicone rubber housing
- Composite insulating core
- Metal contacts and carrier
Manufacturing Process
- Core production
- Housing moulding
- Contact and carrier assembly
- Electrical and dimensional check
- Packing for export
Customisation Options
- Ratings confirmed against your protection design
- Quoted with 33kV arresters as a pole top protection package
- Line schedule quantities priced as one list
Compared With Other Options
| 11kV silicone drop out fuse | Same construction at the lower class. The feeder voltage decides. |
|---|---|
| 33kV combi unit | The combi unit combines fuse and arrester functions at one position. |
| 36kV porcelain drop out fuse | The ceramic option at the higher class where a porcelain housing is specified. |
Use Guide
- Match the link rating to the protection study for the position
- Check the carrier drops clear of the structure when it operates
- Keep earth leads short at the position
- Record installed ratings for replacement link ordering
Related Products
11kV Silicone Drop Out Fuse
Pole mounted 11kV drop out fuse with a silicone composite housing
View details →
33kV Silicone Combi Unit
Combined 33kV drop out fuse and surge arrester in one pole top unit
View details →
33kV Silicone Surge Arrester
Pole mounted 33kV surge arrester with a silicone composite housing
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 →33kV Silicone Drop Out Fuse Questions
Why does creepage matter more at 33kV
A longer surface path is required for the higher voltage, and a longer path in polluted wet air is more surface for a conductive film to form across. That is why the housing material matters more at 33kV, not less.
Can it be mounted in any orientation
Mount it so the carrier drops clear without fouling the structure. Confirm the mounting arrangement in your enquiry.
Do you supply 11kV and 33kV on one order
Yes. Mixed-voltage programmes stay on one purchase order.
Get a Price on 33kV Silicone Drop Out Fuse
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