High Voltage Transformer Bushings production

10kV 250A Screw Thread Transformer Bushing For 10kVA To 333kVA

Name: 10kV 250A Screw Thread Transformer Bushing For 10kVA To 333kVA
Brand: Risheng PX

10kV 250A screw thread transformer bushing insulator

Screw thread transformer bushing stem and nut detail

10kV threaded transformer bushings arranged in a tray

High Voltage Transformer Bushings

Product Overview

A screw thread transformer bushing rated 10/12 kV at 250 A, sized for single and three phase distribution transformers from 10 kVA up to 333 kVA. The threaded stem carries the terminal connection directly, which removes a separate clamp from the terminal board. The body is 332 mm tall and 110 mm in diameter with a minimum 270 mm creepage distance and a 2.66 kg weight.

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Key benefits

Why Buyers Choose This Part

Threaded stem takes the terminal connection without a separate clamp
Covers the 10 kVA to 333 kVA transformer range with one part
Minimum 270 mm creepage on a 332 mm tall body
2.66 kg unit weight suits pole-mounted transformer terminal boards

Application scenarios

Where It Is Used

Pole-mounted distribution transformers from 10 kVA to 333 kVA
Single phase transformer terminal boards using threaded stems
Rural distribution networks at 10 and 12 kV
Transformer assembly lines standardising on a threaded HV terminal

Who it is for

Who It Suits

Distribution transformer manufacturers in the 10 kVA to 333 kVA range
Rural electrification contractors
Transformer repair shops replacing threaded HV bushings

Problems it solves

What Goes Wrong Without The Right Part

Terminal clamps that loosen and heat on pole-mounted units
One bushing per transformer size, which multiplies stock lines
Creepage too short for rural dust and agricultural spraying
Heavy terminal parts that overload a small transformer cover

Technical features

How It Is Built

Rated 10/12 kV at 250 A
For transformers from 10 kVA to 333 kVA
332 mm height and 110 mm diameter
Minimum 270 mm creepage distance
2.66 kg net weight
Screw thread terminal stem

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.

Minimum Creepage Distance	270 mm
Net Weight	2.66 kg
Height	332 mm
Diameter	110 mm
Rated Voltage	10/12 kV

Materials

Electrical porcelain shell
Threaded copper or aluminium alloy stem

Manufacturing

Process

Forming
Glazing
Firing
Thread machining and assembly
Routine test

Quality control

Testing

Thread gauge check on every stem
Creepage verified against the 270 mm minimum
Electrical routine test at the 10/12 kV class

Certifications

Certification

ISO 9001 quality management system

Customisation

Customisation Options

Thread size cut to your terminal specification
Copper or aluminium alloy stem
Made to drawing or sample

Comparison

How It Compares

Flange-mounted DIN bushing	The screw thread version connects directly to the terminal stud, which is the usual arrangement on smaller pole transformers where there is no room for a DIN terminal board.
1.2 kV LV threaded bushing	Same threaded principle, different side of the transformer. This one is the 10/12 kV HV part.

Use guide

Before You Order And After It Arrives

Match the thread size to your terminal hardware before ordering
Tighten the terminal nut against the shoulder, not against the porcelain
Check the 110 mm diameter clears the transformer cover opening
Keep the creepage surface clear of nesting debris on rural lines

Questions