GB B-1/315 Transformer Bushing Insulator 1kV

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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.

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

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 Suits

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

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

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

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

Process

• Forming
• Glazing
• Firing
• Conductor assembly
• Routine electrical test

Testing

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

Certification

• Chinese National Standard GB pattern
• ISO 9001 quality management system

Customisation Options

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

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.

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

GB B-1/315 Transformer Bushing Insulator 1kV Questions

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Quote For GB B-1/315 Transformer Bushing Insulator 1kV

Send the quantity and any drawing you have. Enquiries are answered within 24 hours, and we produce to customer drawings and samples.