DIN 20NF630A Transformer Bushing 440mm Creepage
High Voltage Transformer Bushings
Product Overview
A DIN-pattern 20NF630A outdoor bushing for 20/24 kV transformers carrying up to 630 A. It brings the winding lead through the tank wall and holds it against the mechanical pull of the external connection. The 440 mm creepage distance is the figure to check against your site pollution level, and the 6.1 kg weight keeps the terminal board load modest for a 630 A part.
Key benefits
Why Buyers Choose This Part
- 630 A continuous rating covers the larger distribution transformer sizes
- 440 mm creepage suits normally polluted outdoor air without an extended shed
- Dual 20/24 kV rating lets one part number serve two network voltages
- 125 kV BIL with 50 kV wet withstand on a 385 mm tall body
Application scenarios
Where It Is Used
- 20 kV and 24 kV distribution transformers up to 630 A terminal current
- Substation transformers where the DIN terminal pattern is already standardised
- Export orders that must match an existing DIN 20NF630A fitting
- Stock holding for transformer builders serving European specifications
Who it is for
Who It Suits
- Transformer manufacturers building to DIN terminal patterns
- Distributors supplying European and Middle Eastern utility projects
- Maintenance teams matching an installed DIN bushing footprint
Problems it solves
What Goes Wrong Without The Right Part
- Sourcing a 630 A bushing that still drops into the DIN mounting pattern
- Creepage that is too short for the site and starts tracking within a season
- Mixed 20 kV and 24 kV fleets that would otherwise need two part numbers
- Conductor joints that heat because the bushing stem is undersized for 630 A
Technical features
How It Is Built
- Rated 20/24 kV at 630 A
- 440 mm nominal creepage distance
- 125 kV BIL, 50 kV wet power frequency withstand
- 385 mm height and 165 mm diameter
- 6.1 kg net weight
- Porcelain shell with copper or aluminium alloy conductor
Specifications
Published Figures For This Product
Every value below comes from the manufacturer data for this item. Figures not listed are confirmed against the drawing before an order is placed.
| Nominal Creepage Distance | 440 mm |
|---|---|
| Net Weight | 6.1 kg |
| Height | 385 mm |
| Diameter | 165 mm |
| Rated Voltage | 20/24 kV |
| Rated Current | 630 A |
| BIL | 125 kV |
| Power Frequency Withstand Voltage Wet | 50 kV |
Materials
Materials
- Alumina electrical porcelain shell
- Electrolytic copper or aluminium alloy conductor
Manufacturing
Process
- Porcelain forming
- Glaze and fire
- Conductor machining
- Assembly and sealing
- Electrical routine test
Quality control
Testing
- Creepage distance verified against the 440 mm drawing figure
- Power frequency withstand test at 50 kV wet
- Contact resistance check on the 630 A conductor path
Certifications
Certification
- ISO 9001 quality management system
Customisation
Customisation Options
- Alternative creepage distances on request
- Copper or aluminium alloy conductor to suit your busbar metal
- Customer marking under OEM or ODM arrangements
Comparison
How It Compares
| DIN 20NF250A | Same voltage class, but the 630 A conductor path handles roughly two and a half times the continuous current, so it belongs on larger transformer ratings. |
|---|---|
| DIN 24KV630A CD525 | Shorter creepage at 440 mm against 525 mm. Choose this one for ordinary outdoor air and the CD525 where salt or industrial fallout is heavy. |
Use guide
Before You Order And After It Arrives
- Confirm the 165 mm diameter clears your terminal board cut-out
- Match the conductor metal to the cable lug to avoid a bimetallic joint
- Keep the shed surface clean during storage so the glaze is not scratched
- Support the body during transport, do not let it hang on the stem
Questions
DIN 20NF630A Transformer Bushing 440mm Creepage Questions
What creepage distance does the 20NF630A give?
440 mm nominal. For heavily polluted or coastal sites ask about the 525 mm version instead.
Is it rated 20 kV or 24 kV?
Both. It is rated 20/24 kV, which is why one part number covers networks at either voltage.
What conductor material do you supply?
Electrolytic copper or aluminium alloy. Tell us what your lugs are made of and we will match it.
What is the net weight?
6.1 kg, with a body 385 mm tall and 165 mm in diameter.
Can you produce to our drawing?
Yes. We produce to customer drawings and samples, and we can design to your requirements if the drawing is not finished.
How long does a first order usually take?
Lead time depends on quantity and whether the pattern is already tooled. Send the drawing and quantity on WhatsApp and we will confirm a date with the quote.
Related
Related Products
EN 36/250/P3 Transformer Bushing Insulator 36kV
- Voltage 36 kV
- Height 600 mm
- Diameter 155 mm
24kV Porcelain Transformer Bushing 150kV BIL
- Wet Power Frequency Withstand Voltage 60 kV
- Net Weight Per Bushing 8 kg
- Height 453 mm
DIN 24kV 630A Transformer Bushing CD525
- Creepage Distance 525 mm
- Net Weight 6.8 kg
- Height 385 mm
DT 33kV 250A Porcelain Transformer Bushing
- Rated Voltage 33 kV
Quote For DIN 20NF630A Transformer Bushing 440mm Creepage
Send the quantity and any drawing you have. Enquiries are answered within 24 hours, and we produce to customer drawings and samples.