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Dehler
Dehler
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.
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.
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.
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.
