DIN 42531 30NF250A Transformer Bushing
High Voltage Transformer Bushings
Product Overview
A DIN 42531 bushing in the 30NF250A pattern, used to connect transformers and generators to high voltage transmission lines. Construction is a porcelain shell over an iron core and conductors, a combination that resists high pressure, high temperature, arc and dirt. The ceramic shell uses alumina and mica materials, the core is silicon steel sheet and the conductor is electrolytic copper or aluminium alloy.
- DIN 42531
Key benefits
Why Buyers Choose This Part
- DIN 42531 pattern, the standard most 30NF drawings reference
- Silicon steel core to reduce hysteresis and iron loss
- Alumina and mica shell for insulation performance and mechanical strength
- Electrolytic copper or aluminium alloy conductor for good conductivity
Application scenarios
Where It Is Used
- Transformers and generators connecting to high voltage transmission lines
- Terminal boards drawn to the DIN 42531 pattern
- Replacement of 30NF250A bushings during transformer overhaul
- Transformer manufacture standardising on the DIN NF series
Who it is for
Who It Suits
- Transformer manufacturers working to DIN 42531
- Generator package and substation builders
- Distributors supplying the DIN NF bushing range
Problems it solves
What Goes Wrong Without The Right Part
- Terminal boards that only accept the DIN 42531 dimensional pattern
- Losses in the core and conductor path under continuous load
- Shell degradation from arc, heat and airborne dirt
- Long lead times on 30NF pattern replacement parts
Technical features
How It Is Built
- DIN 42531 30NF250A pattern
- Porcelain shell with iron core and conductors
- Shell of alumina and mica ceramic materials
- Silicon steel sheet iron core
- Electrolytic copper or aluminium alloy conductor
- Resistant to high pressure, high temperature, arc and dirt
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.
| DIN 42531 30NF Pattern | 250 A |
|---|
Materials
Materials
- Alumina and mica ceramic shell
- Silicon steel sheet core
- Electrolytic copper or aluminium alloy conductor
Manufacturing
Process
- Shell forming
- Glazing
- Firing
- Core and conductor assembly
- Routine electrical test
Quality control
Testing
- Strict inspection and testing before despatch
- Conductor path and contact verification
- Shell and glaze integrity inspection
Certifications
Certification
- Manufactured to DIN 42531
- ISO 9001 quality management system
Customisation
Customisation Options
- Special lengths and screw sizes to customer specification
- Copper or aluminium alloy conductor
- OEM and ODM marking
Comparison
How It Compares
| DIN 30NF250 listing | The same 30NF250 family. This entry quotes the DIN 42531 standard reference explicitly, which is what most drawings call out. |
|---|---|
| DIN 42531 20NF-250A | Same standard and current rating at a lower voltage class. Match the NF number to the transformer voltage. |
Use guide
Before You Order And After It Arrives
- Check the drawing references DIN 42531 rather than a neighbouring DIN number
- Inspect and test before installation as the standard requires
- Apply protective grounding and lightning protection
- Match the conductor metal to your connection lugs
Questions
DIN 42531 30NF250A Transformer Bushing Questions
What standard is this bushing built to?
DIN 42531, in the 30NF250A pattern.
What is the shell made of?
Ceramic materials such as alumina and mica, which give good insulation performance and mechanical strength.
Why is the core made of silicon steel?
Silicon steel sheets reduce hysteresis loss and iron loss, improving energy utilisation efficiency.
What conductor material is used?
High-quality electrolytic copper or aluminium alloy.
What should be checked before installation?
Strict inspection and testing for compliance with the applicable standards and technical requirements, plus protective grounding and lightning protection.
Can you produce a special length?
Yes, bushings are manufactured to customer specifications including special lengths and different screw sizes.
Related
Related Products
EN 50180 24kV 250A Porcelain Transformer Bushing
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DIN 42531 10NF250A Transformer Bushing
- DIN 42531 10NF Pattern 250 A
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DIN 42531 20NF250A Transformer Bushing Isolators
- DIN 42531 20NF Pattern 250 A
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