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Bushing Insulator

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Transformer Bushing Insulators

Reliable Electrical Insulation Solutions for Power Transformers

Transformer bushings are critical components used to safely conduct electrical current through grounded transformer tanks while maintaining excellent insulation performance. Weshare provides a complete range of porcelain and composite transformer bushings for distribution transformers, power transformers, substations, and electrical equipment manufacturers. Our products are designed to meet international standards and ensure long-term reliability under demanding operating conditions

 

Porcelain Transformer Bushings

Traditional ceramic bushings offering outstanding insulation performance and long-term durability.

Available Models

1kV / 250A, 1kV / 630A, 1kV/1000A, 1kV / 2000A, 10NF250, 20NF250, 30NF250, XP70 Series

Composite Bushings

Lightweight design with enhanced pollution resistance and improved mechanical strength.

Oil Transformer Bushings

Designed for oil-immersed transformers with reliable sealing performance and excellent insulation properties.

HV & LV Transformer Bushings

Suitable for both high-voltage and low-voltage transformer connections.

The company supplies multiple standard and customized bushing models for transformer manufacturers worldwide.

 

 

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The role of bushings in transformer systems

Bushings are critical components that safely conduct current through the transformer tank while maintaining electrical insulation.

 

① Interface between internal winding and external power network

② Works together with oil system, insulation system, and tank structure

③ Directly affects dielectric performance and long-term reliability

 

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bushing insulator
Weshare produces various types of transformer bushing insulators
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Type
1kv/630A

1. Good electrical performance

2. Good mechanical strength

3. Moisture-resistant and corrosion-resistant

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Type
20NF250

1. High resistivity

2. High dielectric strength

3. Good mechanical properties

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Type
XP70

1. Good insulation performance

2. Excellent Weatherability

3. High Heat Resistance

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Type
LXP-40

1. Excellent electrical performance

2. Excellent anti-corrosion performance

3. High mechanical strength

 

Where Bushings Fit in Our One-Stop Transformer Supply?

 

 

One-stop transformer solutions, precise and reliable in every aspect.
From the core iron core to the external accessories, we not only provide transformers, but also offer complete supporting guarantees. Among them, the insulating bushing, as a key component, directly affects the safety and stability of the transformer - and we are the reliable "every link" you can count on.


Why choose us?
· Precise Matching: Customized bushings specifically for your transformer model
· Reliable Quality: Rigorous testing to ensure withstand voltage and sealing performance
· Quick Response: One-stop supply to shorten delivery time
· Full Support: From selection to installation, technical team available online at all times
Not just providing bushings - but also peace of mind
Whether it's oil-immersed, dry-type, or special transformers, we can offer you suitable insulation solutions.

 

Why Transformer Manufacturers Trust Hangzhou Weshare Bushings?

 

 

High dielectric strength & pollution resistance

01

Full voltage range support (LV / HV / EHV)

02

Porcelain & composite insulation solutions

03

Custom design based on drawings or specs

04

IEC/ANSI test support & project compliance

05

Stable batch supply & long-term partnership

06

Designed for High Voltage Performance

07

 

 

Our Quality Control – What Risks We Help You Eliminate

 

 

1.Routine Electrical Tests   Ensures each bushing meets rated voltage and insulation requirements before delivery.

2.High Voltage & Dielectric Testing    Simulates real operating conditions to prevent partial discharge and flashover risks.

3.Batch Consistency Control   Guarantees stable performance across mass production and long-term supply.

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Voltage test
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High voltage testing

 

Production process

 

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Grinding
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Clay Maikng
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Drying
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Labeling
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Glazing
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Kilning
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Testing
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Final Products

 

Typical Project Applications

 

 

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Oil transformer

Designed to match oil level, tank structure, and internal insulation systems.

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Dry transformer

Suitable for indoor applications with enhanced creepage and insulation coordination.

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Power station

Engineered for outdoor environments with pollution and weather resistance.

 

FAQ

Q: What is the difference between a bushing and an insulator?

A: Function: Electrical insulators are used to provide insulation and support to electrical components and equipment, while electrical bushings are used to provide a pathway for conductors or cables to enter or exit an electrical enclosure while maintaining electrical isolation.

Q: What is the purpose of a transformer bushing?

A: In electric power, a bushing is a hollow electrical insulator that allows an electrical conductor to pass safely through a conducting barrier such as the case of a transformer or circuit breaker without making electrical contact with it.

Q: Where is the bushing on a transformer?

A: The bushings on a padmount are always in the cabinet on the front of the unit with low-voltage bushings on the right and the high-voltage bushings on the left. Substation transformers can have the bushings located almost anywhere on the unit.

Q: What happens when a bushing goes out?

A: Often overlooked, bushing failure can cause a ripple effect of pressure and wear on surrounding components. This wear ultimately results in additional loading and pressure on the steering, suspension and driveline components. Over time, this constant stress contributes to accelerated part failure.

Q: Why do transformer bushings fail?

A: Bushing leaks developing over time in operation – Most commonly, bushing leaks are caused by ageing or by improper gaskets, as well as the weak adhesion between the epoxy and the conductor.

 

As one of the leading bushing insulator suppliers in China, we warmly welcome you to wholesale high-grade bushing insulator made in China here from our factory. All our products are with high quality and competitive price.