DIN 42531 30NF250A Transformer Bushing

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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

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

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 Suits

• Transformer manufacturers working to DIN 42531
• Generator package and substation builders
• Distributors supplying the DIN NF bushing range

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

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

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

• Alumina and mica ceramic shell
• Silicon steel sheet core
• Electrolytic copper or aluminium alloy conductor

Process

• Shell forming
• Glazing
• Firing
• Core and conductor assembly
• Routine electrical test

Testing

• Strict inspection and testing before despatch
• Conductor path and contact verification
• Shell and glaze integrity inspection

Certification

• Manufactured to DIN 42531
• ISO 9001 quality management system

Customisation Options

• Special lengths and screw sizes to customer specification
• Copper or aluminium alloy conductor
• OEM and ODM marking

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.

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

DIN 42531 30NF250A Transformer Bushing Questions

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Quote For DIN 42531 30NF250A Transformer Bushing

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