Paragon Electrical Contacts

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sales@paragonelectricalcontacts.com

Office Address

W-177, MIDC, Ambad, Nashik, Maharashtra 422010

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Products

RIVETS

1. Solid Rivets

Offering advanced electric performance, solid rivets are synthetic in an extensive variety of sizes and alloys. High-speed cold heading provides extra strength to our contact rivets with steady excessive quality. Standard rivets are commonly provided with a solid shank and also are to be had with an indent or chamfered shanks. The accompanying heads can be flat, radial, conical, or customized.

  • Contact Material Silver (Ag), Hard Silver (Ag), Silver Copper (AgCu),
    Silver Nickel (AgNi), Silver Cadmium Oxide (AgCdo),
    Silver Tin Oxide (AgSno, & Copper (Cu)
2. Bimetal Rivets

In a bimetal contact rivet, a layer of silver or silver alloy is metallurgically bonded to a copper shank. This excessive strength bonding imparts higher thermal and current switches in comparison to the brazed or welded types. Bimetal rivets can be provided with flat, radial, conical, or custom-designed heads. The shank will be solid, indent, or chamfered in numerous sizes and specifications.

  • Contact Material Silver (Ag), Hard Silver (Ag), Silver Copper (AgCu)
    Silver Cadmium Oxide (AgCdo)
    Silver Nickel (AgNi) Silver Tin Oxide (AgSno)
    Base Metal Copper (Cu)

SEMI TUBULAR & HEXAGONAL BIMETAL CONTACT RIVETS

This contact surface is made up of silver material and the base of high-grade electrolytic copper.

  • Contact Material  Silver (Ag), Hard Silver (Ag), Silver Copper (AgCu)
    Silver Cadmium Oxide (AgCdo)
    Silver Nickel (AgNi), Silver Tin Oxide (AgSno)
    Base Metal Copper (Cu)

BUTTON CONTACTS

Paragon Button contacts are suitable for Relays, Contactors,
Thermostats, Thermal Protectors, Sensor Circuit breakers, switches etc..
Button contact has contact surface of silver and base made of copper,
cupronickel, Nickel and Iron. Button contacts are provided with welding
projection for easier welding.

  • Contact Material Silver – Cadmium Oxide (AgCdo), Silver Nickel (AgNi)
    Base Material
    Cupro-Nickel (CuNi), Copper (Cu), Nickel (Ni) &
    Iron (Fe)
 

CONTACT ASSEMBLIES

We offer our customers complete assemblies including welded, brazed, or riveted assemblies. The carriers are available in various base metals such as copper, brass, phosphor bronze, etc.

ALLOYS

Silver-Graphite contacts are manufactured by powder metallurgy and are normally supplied with vertical graphite particle orientation or with random structure. For some applications, it can also be produced with parallel graphite particle orientation.

Silver-Graphite is normally used in circuit breakers, motor-protective circuit breakers, fault-current circuit breakers and power switches.

Because of the graphite properties, this material is known for having the best anti-welding properties among the contact materials. In addition to that, due to the high silver content, Silver-Graphite contacts have low contact resistance. The disadvantages of this contact material is the low arc erosion resistance, especially during break operations and the low formability.

Our Silver-Graphite contacts are available in the form of contact tips with a brazeable silver side or with brazing alloy layer. The typical properties of this material are listed in the table below:

Silver-Zinc Oxide is another contact material used for replacing Silver-Cadmium Oxide in European Union, typically used in lower current switches, relays and contactors. In addition to not be a hazardous material, the main properties of Zinc Oxide contacts are:

  • Very low arc erosion
  • Low and stable contact resistance during the lifetime of the device
  • Excellent anti-welding properties

Our Silver-Zinc Oxide contacts can be produced in the shape of wires, strips, rivets and contact tips. The typical composition produced by HP is Ag/ZnO 91/9.

If you have different requirements, HP has a team of materials engineers, specialized in the development of contact materials, that will study your necessities.

Silver-Refractory Material family is mainly composed by Silver-Tungsten (Ag/W), Silver-Tungsten Carbide (Ag/WC) and Silver-Molybdenum (Ag/Mo) and is a special category of arcing contact materials for use in high fault current applications, like residential circuit breakers, industrial breakers and high current switchgears. Ag/W materials are largely used in North America as a result of the high current level fault protection required by UL even for residential homes, while in Europe Ag/WC is the most common material of this family, normally paired with Ag/C. These materials combine the excellent electrical and thermal conductivity of silver with the high arc resistance, high hardness and high thermal resistance of the refractory metals and its carbides, offering a composite material with the following properties:
  • Low contact welding
  • Low erosion, under arcing
  • Very high resistance against arc erosion, even under high currents
  • Poor arc moving properties
  • High hardness
  • Low, but acceptable contact resistance
The table below shows the difference between these contact materials.
CONTACT MATERIAL
COMPARISON
Ag/W
  • Highest hardness
  • Highest arc resistance
  • Increasing contact resistance and temperature rise during lifetime
  • Highest welding tendency during short-circuit
Ag/WC
  • Lowest contact resistance and temperature rise
  • Stable contact resistance
  • Lower tendency to contact welding
  • Lower arc resistance
Ag/Mo
  • Worse anti-welding and anti-corrosion properties than Ag/W
  • Stable contact resistance
  • Low density of Molybdenum brings cost advantage
  • Lower arc resistance
These materials, in the shape of contact tips, can be produced by different PM routes and can be highly customized depending on the application of the customer and typical properties of some alloys are listed in the table below:
Copper-Tungsten is a contact material used as electrodes or for high power switching in medium and high voltage. The properties of Cu/W materials are similar to the properties of Ag/W. Nonetheless, although the cost of Cu/W is much lower than the cost of Ag/W, it cannot be used as a replacement, because, unlike the silver oxides, the copper oxides are very stable in high temperatures and drastically impact the contact resistance. Therefore, Cu/W are normally used in applications where the contact tip is protected against oxidation. Copper-Tungsten is supplied by HP in the shape of contact tips and can also be machined into complex shapes. The typical properties are the following:
Harder than fine Silver, this contact material has a higher melting point and exhibits a nobler surface. It is largely resistant to sulphur and abrasion and burning. Available in the form of wire, rivets, profiles and contact tips.

CERTIFICATIONS

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