Custom Spring-loaded Flat Contacts for Switchgear Manufacturer, Suppliers

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Custom Spring-loaded Flat Contacts for Switchgear Manufacturer, Suppliers

Spring-loaded flat contacts are core contact components indispensable for medium and high-voltage switchgear, particularly handcart circuit breakers and similar power equipment. Crafted with high-conductivity copper alloy flat contact fingers (contact pieces), they rely on internal precision springs to deliver consistent elastic force. This force ensures the contact pieces form tight, stable contact with moving and stationary contacts, enabling reliable electrical connection and disconnection while minimizing contact resistance. Effectively preventing poor contact or arcing, they safeguard normal circuit operation and the safe runtime of equipment. Widely adopted in 10kV-35kV ZN63(VS1) circuit breakers, they play a pivotal role in stabilizing power transmission and distribution systems.

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Product Description

Key Features

Structure Composed of multiple flat contact pieces and a tension spring providing pressure, the overall shape is flat.

Principle Utilizing the elasticity of the spring, the contact pieces are pressed tightly against the mating contacts, increasing the contact area and reducing contact resistance.

Application Primarily installed in the contact box of handcart-type circuit breakers (such as ZN63, VS1 type), working in conjunction with the moving and stationary contacts.

Performance Must meet national standards (such as GB3906-1991), possessing good electrical conductivity, thermal conductivity, wear resistance, and resistance to electro-corrosion.

Functions

Conduction When the circuit breaker is closed, it provides a low-resistance, large-section current path that matches the equipment’s rated current, ensuring efficient and stable current transmission without significant energy loss.

Reliability The spring maintains constant contact pressure even after long-term use, avoiding loose contact due to vibration or wear, and preventing arcing, overheating, and equipment damage caused by poor contact.

Breakdown When the circuit breaker is opened, the contact pieces achieve fast separation response, coordinating with the arc-extinguishing system to quickly extinguish electric arcs and safely interrupt large short-circuit currents or rated currents.

Application Examples

GC6-400A (10KV) / GC8-630A (35KV) spring-loaded flat contacts, GC8-1600A (35KV) spring-loaded flat contacts, GC8-1250A (35KV) spring-loaded flat contacts, and GC6-1600A (10KV) spring-loaded flat contacts.

Product Display

Spring-loaded Flat Contacts for Switchgear (1)

Spring-loaded Flat Contacts for Switchgear (2)

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Spring-loaded Flat Contacts for Switchgear (4)

Spring-loaded Flat Contacts for Switchgear (5)

Spring-loaded Flat Contacts for Switchgear (6)

Frequently Asked Questions

What are the primary applications of spring-loaded flat contacts?

They are mainly used in the contact boxes of handcart-type circuit breakers, such as ZN63 and VS1 types, for both 10KV and 35KV power systems.

How does the spring-loaded design improve electrical performance?

The tension spring ensures constant pressure, which increases the contact area between the flat pieces and mating contacts, thereby significantly reducing contact resistance.

What materials are these contacts typically made of?

They are manufactured using materials with high electrical and thermal conductivity, featuring excellent wear resistance and resistance to electro-corrosion to meet GB3906-1991 standards.

Can these contacts handle short-circuit currents?

Yes, they are designed to provide a low-resistance path for rated currents and coordinate with arc-extinguishing systems to safely interrupt large short-circuit currents.

Do these products require frequent maintenance?

The spring-loaded mechanism is designed to maintain constant pressure over long-term use, minimizing loose contacts caused by vibration and reducing the need for frequent adjustments.