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China Reliable High-Voltage Plum Blossom Contacts by China Suppliers | Quality Factory Manufacturing for Power Equipment Suppliers, Exporter
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China Reliable High-Voltage Plum Blossom Contacts by China Suppliers | Quality Factory Manufacturing for Power Equipment Suppliers, Exporter
High-voltage plum blossom contacts are essential conductive components utilized in the primary circuits of high-voltage vacuum circuit breakers, disconnectors, and other power equipment. Manufactured in China, our factory produces these contacts featuring multiple silver-plated copper contact fingers, chosen for their superior conductivity and the anti-oxidation properties of silver plating. The unique plum blossom-like arrangement maximizes contact area, enhancing performance, Our high-voltage contacts are designed with elastic springs that provide uniform pressure to each finger, ensuring reliable multi-point contact and adaptability to minor displacements. With low contact resistance, exceptional operational stability, efficient heat dissipation, and robust short-circuit withstand capability, these contacts are ideal for high-voltage switchgear rated from 10kV to 500kV. As trusted suppliers in the industry, we ensure that these components play a critical role in maintaining stable, low-loss current transmission while safeguarding the long-term operation of power system equipment
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.
Advantages
Low contact resistanceMulti-point parallel contact reduces contact resistance by 30%–50%.
High stabilityUniform pressure, strong self-adaptability, minimal oxide film formation, and low resistance fluctuation.
Good heat dissipationGaps between contact fingers form natural heat dissipation channels, resulting in low temperature rise.
Strong short-circuit withstand capabilityUniform current distribution effectively suppresses contact bounce and can withstand large short-circuit currents.
Self-cleaning effectSlight bounce during contact can remove the oxide layer, maintaining good contact.
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
Frequently Asked Questions
Q1 What are plum blossom contacts and why are they used in high-voltage switchgear?
Plum blossom contacts (also called tulip contacts) are multi-finger electrical contacts made from precision-stamped T2 copper. They are used in high-voltage switchgear because their multi-point design significantly increases the contact area, reduces contact resistance, and provides excellent current-carrying capacity and reliability.
Q2 How does the silver-plating on the contact surface improve performance?
The thick silver-plating on the contact surface provides superior electrical conductivity and prevents long-term oxidation. The anti-discoloration treatment further ensures that the silver layer remains stable over time, maintaining consistent and low contact resistance throughout the service life.
Q3 What voltage ranges are these contacts suitable for?
These plum blossom contacts are suitable for use across a wide voltage range, from 10kV up to 500kV. They are compatible with various high-voltage switchgear types, including ZN63 (VS1) handcart circuit breakers, disconnecting switches, and SF6 load switches.
Q4 How do plum blossom contacts handle short-circuit conditions?
The multi-point parallel contact design ensures uniform current distribution across all contact fingers, which effectively suppresses contact bounce during fault conditions. This allows the contacts to withstand large short-circuit currents without damage.
Q5 What is the self-cleaning effect of plum blossom contacts?
The self-cleaning effect refers to the slight sliding or wiping action that occurs between the contact fingers and the conductor during each contact operation. This action mechanically removes oxide layers and contaminants, ensuring consistently low contact resistance.
Q6 How does the ring spring contribute to the reliability of these contacts?
The non-magnetic stainless steel bracket combined with the ring spring works together to apply uniform and consistent pressure to each individual contact finger. This even pressure distribution prevents localized overheating and ensures all contact fingers maintain reliable connection.
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