Surge Arrester Contact Assembly

The surge arrester contact assembly is a complete sub-assembly including the disconnector tulip contact, spring mechanism, housing, and supporting components, supplied as a single unit for surge arrester OEMs who prefer to source the disconnector interface as a complete module rather than assembling component-by-component.

For just the contact element, see Surge Arrester Tulip Contact. For full surge arresters (the active arrester element itself), we don't supply. Our scope is the contact sub-assembly only.

Specifications

Property	Value
Application	Disconnector interface sub-assembly for MV surge arrester
Included Components	Tulip contact, spring mechanism, housing, terminals
Tulip Material	Copper, silver-plated
Spring Material	Stainless steel
Housing Material	Per surge arrester OEM design
Voltage Class	Common distribution MV ratings (e.g. 12 / 24 kV)
Surge Current Rating	Transient duty; application-specific (typically kA range)
Operation Mode	Single fail-safe disconnect event
Mounting Interface	Per surge arrester OEM design

Exact certified properties for your lot are available with material documentation on request.

Applications

• Disconnector sub-assembly in MV distribution surge arresters
• Replacement disconnector modules for installed surge arrester fleets
• Sub-supply to surge arrester OEMs

Technical Notes

The disconnector sub-assembly is where the surge arrester's fail-safe behavior happens. When the arrester ages out or experiences a fault that causes it to fail, the spring mechanism in the disconnector releases, separating the arrester from the line and providing visible confirmation that the arrester is no longer in service. The contact assembly has to hold reliably for the decades the arrester operates normally, and then release reliably when the disconnector activates.

This is a single-event duty cycle: the assembly performs one mechanical operation in its service life. That makes the design priorities different from switchgear contacts, long-term dimensional stability and reliable release matter more than insertion cycle life.

For surge arrester OEMs, sourcing the assembly as a complete module simplifies integration: instead of qualifying tulip + spring + housing separately, you qualify one part number. For service / refurbishment, replacing the complete sub-assembly is often easier than rebuilding the disconnector from components.

Sourcing & OEM

Custom surge arrester contact assemblies to your drawing are routine. Specify the full assembly geometry, voltage class, and mounting interface; contact us with the drawing for a project-specific quote.