What are PV Relay Riveting Contact Components?
PV Relay Riveting Contact Components are separate static‑contact blanks and moving‑contact blanks for assembling photovoltaic DC relays. Unlike fully pre‑assembled contact sets, these are individual stamping‑riveted parts for customer secondary relay‑assembly. Manufactured via progressive in‑die riveting, silver alloy tips are selected to resist DC arc erosion in the solar inverter DC‑loop, ensuring low, stable contact resistance for long‑term photovoltaic system operation.
Material and Structural Selection of Electric Contacts for PV Relay
Properties of the C1100 Copper Base
The base of the riveted assembly utilizes C1100 tough-pitch copper, offering an electrical conductivity of up to 100% IACS. This high-purity metal base ensures efficient heat dissipation from the switching interface during continuous high-amperage operation in photovoltaic combiner boxes.
Selection Criteria for Silver Alloy Contacts
Contact materials are selected based on the anticipated arc characteristics and switching frequency associated with photovoltaic DC operating conditions. Materials such as pure silver or silver-tin oxide alloys are employed to suppress material transfer and prevent micro-welding of contacts during sudden short-circuit faults.
Cold Heading Ensures Metallurgical Bond Integrity
Precision cold heading and mechanical riveting processes are used to tightly bond the copper and silver under controlled pressure, eliminating internal voids and creating a continuous metal grain flow within the rivet head.
Surface Passivation and Anti-Oxidation Treatment
All copper rivet shanks undergo chemical passivation prior to assembly. This protective layer guards against atmospheric corrosion without forming an insulating barrier, thereby ensuring no adverse impact on subsequent resistance welding operations.
Applications of Electrical Contacts for Photovoltaic Relay
Photovoltaic Inverter Relay Assemblies
These contact assemblies are designed for relay structures within photovoltaic inverters, facilitating controlled DC switching.
Photovoltaic DC Switch Modules
Electrical Contacts for Solar Switches are suitable for use in DC-side switching relays within photovoltaic systems.
Smart Energy Equipment
When integrated into monitoring, protection, or energy management equipment, the contact geometry must align with the specified relay housing, spring system, and terminal layout.
Manufacturing Capabilities of Electrical Contacts for Solar DC Relay
Stamping and Forming
Depending on product structure and production volume, processes such as stamping and forming are used to fabricate parts from copper and other conductive metals.
Contact Riveting
Production capabilities include silver contact riveting and in-mold electrical riveting, suitable for relay and switch contact assemblies.
Mold Development
For special contact structures that cannot be produced using existing tooling, project-specific molds can be developed based on approved drawings and sample requirements.
Mass Production
Once technical specifications, samples, and quality requirements are confirmed, mass production can be scheduled based on order quantities and delivery timelines.
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We are well aware that different customers have different needs, especially in the highly professional field of photovoltaic relays. If you need customized PV Relay Riveting Contact Components, we have the ability and technology to tailor them for you.
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