The term epoxy is derived from ‘epoxide’ which is the technical name describing a specific arrangement of carbon and hydrogen atoms (cycl-CH2OCH) that terminate their molecules. It is the placement of the oxygen along epoxy’s carbon chain and the epoxide groups at the ends of the carbon chain that gives epoxy its useful properties, namely that epoxies are tough, extremely weather-resistant and do not shrink as they cure (dry).

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Important Types of Epoxy

  • Bisphenol A: which is the resin most widely used for manufacturing of castings, moldings, laminates and filament composites
  • Novolacs: an epoxy resin with higher heat and chemical resistance and stiffness than Bisphenol A epoxy resin.  Most commonly used to create rigid castings, moldings and laminates. such as epoxy phenol novolacs (EPN) and epoxy cresol novolacs (ECN)
  • Brominated Epoxy:  which are the most ‘fire resistant’ of the epoxy resins.
  • Glycidyls:  Epoxy resin with the most flexibility.

Cycloaliphatics:  It is the most widely used for outdoor parts. Although cycloaliphatic epoxy resin has good mechanical strengh, its rigid structure can result in brittleness




Epoxy vs. Polyester Insulators

  • Greater strength than polyester
  • Better wear resistance and higher resistance to cracking
  • Better chemical resistance(i.e. resistance to alkalis and solvents)
  • Better electrical insulation
  • Has low curing shrinkage and excellent adhesion to metal

Epoxy vs. Silicon Rubber and EPR

Silicon rubber and EPR insulators have a central load-bearing fiberglass core for mechanical functions and a polymeric housing for electrical functions.  In contrast, epoxy resin insulators use the same material to perform both their electrical and mechanical functions thus minimizing the number of interfaces which is much desirable.


Epoxy vs. Porcelain (Fired-Clay)

  • Greater strength than porcelain insulators with weigh approximately half
  • More manufacturing flexibility to making intricate shapes


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RANA-3BM Company was founded on 17 May 2009. Based on the production of electrical equipment, his productions started with Outdoor post Insulators for PARS Arrester factory.

RANA-3BM developed his productions in 2010 with production Indoor post insulators and Bushing. In 2012, the company built the plastic parts of MCB (Miniature Circuit Breaker) and Metal stamping parts of MCB.


Company profile

 A) Epoxy parts: 

– Indoor post Insulators

– Outdoor post Insulators


B) Plastic parts: 

– MCB cover

– RCD cover

– RCCB cover


C) Metal parts:
– Electrical MCB Screw Terminal Connector

– Screw Clamp Terminal Block

– Metal stamping parts of MCB

– Brass Stamping Parts