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Custom Reliable High-Voltage Plum Blossom Contacts from China Suppliers - Quality Factory Components for Power Equipment Factories, Exporter

High-voltage plum blossom contacts are essential conductive components used in the primary circuits of high-voltage vacuum circuit breakers, disconnectors, and other related power equipment. As a leading factory in China, we supply these specialized contacts designed with multiple silver-plated copper contact fingers. The choice of copper, known for its outstanding conductivity, combined with silver plating for enhanced anti-oxidation performance, maximizes the contact area through a unique plum blossom arrangement. Each contact finger is supported by elastic springs that ensure uniform pressure, facilitating reliable multi-point contact while accommodating minor displacements. With low contact resistance, exceptional operational stability, efficient heat dissipation, and robust short-circuit withstand capability, our products are ideal for use in 10kV-500kV high-voltage switchgear. These high-quality components play a crucial role in ensuring stable, low-loss current transmission, safeguarding the safe and long-term operation of power system equipment. As trustworthy suppliers from China, we are dedicated to delivering superior products that meet the demands of modern power applications

Product Description

Structure and Features

Multi-point contact: Composed of multiple precision-stamped T2 copper contact fingers (e.g., 12 for 630A, 30 for 1250A), forming multi-point contact and effectively increasing the contact area.
Elastic pressure: A non-magnetic stainless steel bracket and a ring spring evenly apply pressure to each contact finger, ensuring reliable contact.
Surface treatment: The contact surface is thickly silver-plated and treated to prevent discoloration, preventing long-term oxidation and ensuring stable contact resistance.
Conductivity: Each contact finger forms a line contact with a circular conductor, providing self-cleaning properties and resulting in low and stable contact resistance.

Key Advantages

Low contact resistance: Multi-point parallel contact reduces contact resistance by 30%–50%.
High stability: Uniform pressure, strong self-adaptability, minimal oxide film formation, and low resistance fluctuation.
Good heat dissipation: Gaps between contact fingers form natural heat dissipation channels, resulting in low temperature rise.
Strong short-circuit withstand capability: Uniform current distribution effectively suppresses contact bounce and can withstand large short-circuit currents.
Self-cleaning effect: Slight bounce during contact can remove the oxide layer, maintaining good contact.

Industry Applications

It is widely used in 10kV–500kV high-voltage switchgear, including ZN63 (VS1) handcart circuit breakers, disconnecting switches, and SF6 load switches. These devices are core components of power transmission and distribution systems, making the contacts essential for ensuring stable power supply in industrial plants, power grids, and key infrastructure.

Product Display

Reliable Plum Blossom Contacts for High-voltage Gear (2)
Reliable Plum Blossom Contacts for High-voltage Gear (3)
Reliable Plum Blossom Contacts for High-voltage Gear (4)

Frequently Asked Questions

What is a plum blossom contact and how does it work?
A plum blossom contact (also called a tulip contact) is a multi-finger electrical contact made from precision-stamped T2 copper fingers arranged in a circular pattern. Each finger forms a line contact with a circular conductor, creating multiple parallel contact points that reduce resistance and improve current-carrying capacity.
What voltage range are these contacts suitable for?
These contacts are designed for use in high-voltage switchgear ranging from 10kV to 500kV, covering a wide range of power transmission and distribution applications including industrial plants and power grids.
Why is silver plating used on the contact surface?
The contact surface is thickly silver-plated and treated with an anti-tarnish coating to prevent long-term oxidation. Silver provides excellent electrical conductivity and ensures stable, low contact resistance over the service life.
How do plum blossom contacts handle short-circuit conditions?
The uniform current distribution across multiple contact fingers effectively suppresses contact bounce and allows the contacts to withstand large short-circuit currents, making them highly reliable in fault conditions.
What types of switchgear are these contacts compatible with?
These contacts are compatible with ZN63 (VS1) handcart vacuum circuit breakers, disconnecting switches, and SF6 load switches widely used in medium and high-voltage power systems.
What current ratings are available for these contacts?
The contacts are available in multiple current ratings. For example, a 630A version uses 12 contact fingers while a 1250A version uses 30 contact fingers, scaled to meet specific current-carrying requirements.

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