Low Voltage Transformer Bushings production

GB B-1/315 Transformer Bushing Insulator 1kV

Name: GB B-1/315 Transformer Bushing Insulator 1kV
Brand: Risheng PX

GB B-1/315 transformer bushing insulator for 1kV

Low Voltage Transformer Bushings

Product Overview

A Chinese National Standard GB B-1/315 low voltage transformer bushing rated 1 kV. The body is 105 mm tall and 65 mm in diameter with 85 mm of creepage against a 70 mm arcing distance, weighing 0.29 kg. It is the compact low voltage member of the GB bushing range, for the LV side of distribution transformers built to Chinese National Standard.

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Key benefits

Why Buyers Choose This Part

GB National Standard pattern for domestic and export GB projects
0.29 kg unit weight keeps the LV terminal board light
85 mm creepage with a 70 mm arcing distance at 1 kV
65 mm diameter fits closely spaced LV terminals

Application scenarios

Where It Is Used

Low voltage side of GB standard distribution transformers
Projects specified against Chinese National Standard
Compact LV terminal boards with tight phase spacing
Replacement of installed B-1/315 bushings

Who it is for

Who It Suits

Transformer manufacturers building to GB standards
Buyers on projects that specify Chinese National Standard
Distributors supplying GB pattern LV bushings

Problems it solves

What Goes Wrong Without The Right Part

GB pattern parts unavailable from suppliers focused on DIN and EN
LV bushings too large for a compact terminal board
Creepage figures that do not match the GB drawing
Mixed standards across a transformer built for a GB project

Technical features

How It Is Built

Chinese National Standard GB B-1/315
Rated voltage 1 kV
105 mm height
65 mm diameter
85 mm creepage distance
70 mm arcing distance
0.29 kg weight

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.

Voltage	1 kV
Height	105 mm
Diameter	65 mm
Creepage Distance	85 mm
Arcing Distance	70 mm
Weight	0.29 kg

Materials

Electrical porcelain shell
Copper or aluminium alloy conductor

Manufacturing

Process

Forming
Glazing
Firing
Conductor assembly
Routine electrical test

Quality control

Testing

Creepage verified against the 85 mm figure
Dimensional check on the 105 mm by 65 mm envelope
Insulation test between conductor and mounting

Certifications

Certification

Chinese National Standard GB pattern
ISO 9001 quality management system

Customisation

Customisation Options

GB BLQ-10/315 available for the 10 kV class
Special lengths and screw sizes to specification
Produced to drawing or sample

Comparison

How It Compares

GB BLQ-10/315	The BLQ-10/315 is the 10 kV high voltage member at 240 mm high with 180 mm creepage and 1.7 kg. This is the 1 kV LV part for the other side of the transformer.
DIN 42530 1kV bushings	DIN publishes 50 mm to 75 mm creepage with metric stem threads. The GB pattern uses its own dimensional set, so match to the drawing.

Use guide

Before You Order And After It Arrives

Confirm the drawing specifies the GB designation
Check the 65 mm diameter against the LV terminal spacing
Do not over-torque the small fixing, the body is light
Order the matching GB BLQ-10/315 for the HV side if required

Questions