Key Transformer Accessories Explained: Structure, Function, and Selection Guide
In the global power industry, transformers are critical assets for energy transmission and distribution. However, the performance and reliability of a transformer depend not only on its core and windings, but also on a range of essential components known as transformer accessories.
As a professional transformer accessories supplier, Hangzhou Weshare Import & Export Co., Ltd. provides a full range of high-quality components and complete transformer solutions for global B2B customers, including distributors and transformer manufacturers.
This article will walk you through the key accessories shown in the diagram and help you understand their functions and selection criteria.
1. Surge Arresters – Protecting Against Overvoltage
Surge arresters are critical safety devices installed on transformers to protect them from lightning strikes and switching overvoltages.
Key Features:
Voltage range: typically 3–36kV
Fast response to transient surges
Extends transformer lifespan
For customers seeking custom transformer accessories, selecting the right arrester based on system voltage and environment is essential.
2. High-Voltage & Low-Voltage Porcelain Bushings
Bushings serve as insulated passages for electrical conductors entering or exiting the transformer tank.
High-Voltage Bushings:
Voltage range: 1.2–35kV
Current rating: up to 417A
Designed for high insulation strength
Low-Voltage Bushings:
Voltage range: 1.2–2.5kV
Suitable for high current (below 1600A)
Reliable bushings are a key offering from experienced transformer accessories manufacturers, ensuring both insulation and mechanical stability.
3. Pressure Relief Valve – Safety First
The pressure relief valve prevents internal tank explosions by releasing excess pressure during faults.
Specifications:
Pressure range: 0.03–0.06 MPa
Quick response mechanism
This component is essential for ensuring operational safety, especially in oil-filled transformers.
4. Tap Changer Switch – Voltage Regulation
The tap changer allows adjustment of the transformer's output voltage by changing winding ratios.
Key Data:
Voltage class: up to 35kV (BIL: 150kV)
Current range: 50–300A
For transformer factories, sourcing durable and precise tap changers from a reliable transformer accessories supplier is crucial for performance consistency.
5. CSP Breaker – Integrated Protection
The CSP (Completely Self-Protected) breaker combines multiple protective functions:
Overload protection
Short-circuit protection
Secondary fault isolation
Commonly used in distribution transformers (5–100kVA), it simplifies system design and reduces maintenance.
6. Transformer Ground Lug – Reliable Grounding
Ground lugs ensure safe grounding of the transformer tank, preventing electrical hazards.
Benefits:
Easy installation
Strong mechanical connection
Enhanced safety compliance
Why Choosing the Right Transformer Accessories Matters
Selecting high-quality components directly impacts:
Transformer lifespan
Operational safety
Energy efficiency
Maintenance costs
That's why global buyers increasingly look for custom transformer accessories tailored to their technical requirements and local standards.
Your Trusted Transformer Accessories Partner
At Hangzhou Weshare Import & Export Co., Ltd., we specialize in:
Full range of transformer accessories
Custom solutions for OEM/ODM projects
Strict quality control and global export experience
Whether you are a distributor or a transformer manufacturer, we are committed to being your long-term transformer accessories supplier.
Get in Touch
Looking for reliable transformer accessories manufacturers or customized solutions?
Contact us today for: tongchao@weshare-china.com / whatsapp: 8618658827883
Product catalogs
Technical support
Competitive quotations