DIN 42539 3kV 250A Transformer Bushing DT3KV-250A
Low Voltage Transformer Bushings
Product Overview
A DIN 42539 low voltage transformer bushing rated 3 kV at 250 A with a 120 mm creepage distance. The assembly is fully specified: porcelain shell, NBR gaskets, copper threaded rod, blued steel spin grip nut, zinc-plated brass connector, and stainless steel lock washer and nut. The DIN 42539 family runs from 250 A up to 6500 A with creepage rising from 120 mm to 140 mm.
- DIN 42539
Key benefits
Why Buyers Choose This Part
- Complete assembly with gaskets, connector and hardware specified by material
- NBR gaskets and stainless steel fasteners for a durable oil seal
- Part of a DIN 42539 family spanning 250 A to 6500 A
- Special lengths and screw sizes made to customer specification
Application scenarios
Where It Is Used
- 3 kV low voltage transformer terminals on DIN patterns
- Transformer assembly lines standardising on DIN 42539
- Replacement where the original hardware set is no longer available
- Projects needing several current ratings from one DIN family
Who it is for
Who It Suits
- Transformer manufacturers building to DIN 42539
- Repair shops replacing complete bushing assemblies
- Distributors stocking the DIN 42539 range
Problems it solves
What Goes Wrong Without The Right Part
- Bushings supplied without the gaskets and hardware needed to fit them
- Oil leaks at the flange from the wrong gasket material
- Galvanic problems from mismatched connector and fastener metals
- Mixed current ratings across a transformer range needing one supplier
Technical features
How It Is Built
- DIN 42539 at 3 kV and 250 A
- 120 mm creepage distance
- Porcelain shell
- NBR gaskets
- Copper threaded rod
- Blued steel spin grip nut
- Zinc-plated brass connector
- Stainless steel lock washer and nut
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.
| Creepage Distance | 120 mm |
|---|
Materials
Materials
- Electrical porcelain
- NBR gasket
- Copper threaded rod
- Zinc-plated brass connector
- Stainless steel washer and nut
Manufacturing
Process
- Forming
- Glazing
- Firing
- Rod machining
- Gasket and hardware assembly
- Routine test
Quality control
Testing
- Creepage verified against the 120 mm figure
- Gasket seating and seal check
- Thread and connector fit inspection
Certifications
Certification
- Manufactured to DIN 42539
- ISO 9001 quality management system
Customisation
Customisation Options
- Special lengths made to customer specification
- Different screw sizes on the threaded rod
- Other DIN 42539 current ratings up to 6500 A
Comparison
How It Compares
| DIN 42539 3kV 1000A | Creepage steps up from 120 mm to 125 mm and the conductor path is sized for four times the current. Match the bushing to the transformer LV output. |
|---|---|
| DIN 42530 1 kV series | DIN 42530 covers the 1 kV class with creepage from 50 mm. DIN 42539 is the 3 kV family, so the two are not interchangeable. |
Use guide
Before You Order And After It Arrives
- Order the complete assembly so gaskets and hardware match
- Confirm the threaded rod screw size against your busbar connection
- Replace NBR gaskets whenever the bushing is removed
- Tighten the lock nut against the washer, not against the porcelain
Questions
DIN 42539 3kV 250A Transformer Bushing DT3KV-250A Questions
What creepage distance does the 3 kV 250 A version give?
120 mm. Within DIN 42539 the 630 A version is also 120 mm, the 1000 A to 3150 A versions are 125 mm, the 4500 A is 130 mm and the 6500 A is 140 mm.
What hardware comes with the bushing?
NBR gaskets, a copper threaded rod, a blued steel spin grip nut, a zinc-plated brass connector, and a stainless steel lock washer and nut.
Can you make a special length?
Yes. We manufacture to customer specifications, including special lengths and different screw sizes.
What current ratings are in the DIN 42539 family?
250 A, 630 A, 1000 A, 2000 A, 3150 A, 4500 A and 6500 A.
What voltage is it rated for?
3 kV.
Is this an oil-filled or condenser bushing?
It is a porcelain low voltage bushing. Oil-filled and condenser types are separate constructions used at higher voltage classes.
Related
Related Products
DIN 42539 3kV 630A Outdoor Transformer Bushing DT 3/630
- Tank Hole Size 45 mm
- BIL 40 kV
- Creepage Distance 120 mm
DIN 42530 1kV 2000A Transformer Bushing
- Creepage Distance At This Rating 75 mm
- Weight 1.29 kg
- Creepage Distance 50 mm
DIN 42539 3kV 1000A Transformer Bushing
- Creepage Distance 125 mm
EN 50386 1kV 2000A Outdoor Transformer Bushing
- Creepage Distance 75 mm
- Weight 1.29 kg
Keep reading
Related Cases Guides And Applications
Guide
DIN EN And ANSI Transformer Bushing Standards Explained
GuideTransformer Bushing Selection A Guide For Engineers
GuideWhat Is A High Voltage Transformer Insulator
IndustryDistribution Transformer Manufacturers
IndustryPower Utilities And Substations
SolutionManufacturing To Your Drawing Or Sample
SolutionSelecting Creepage For The Pollution At Your Site
Quote For DIN 42539 3kV 250A Transformer Bushing DT3KV-250A
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