BHR and SRD explosion-proof interlocked receptacles
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BHR and SRD explosion-proof interlocked receptacles

Eaton's Crouse-Hinds series hazardous area interlocked receptacles prevent engagement and disengagement of the plug under load, providing safe portable power connections and extended product life.

Arktite BHR and SRD explosion-proof interlock receptacles are used to supply power to portable electrical equipment such as motor generator sets, compressors, heating and cooling units, lighting systems and conveyors in areas which are hazardous due to the presence of hydrogen or gases, or vapors of equivalent hazard.

Featuring a built-in rotary switch which is operated automatically when the plug is inserted and withdrawn, the plug and receptacle contacts cannot be made or broken under load.  When the plug is inserted, the plug and receptacle contacts engage before the switch closes.  And when the plug is withdrawn, the switch opens before the plug and receptacle contacts disengage.  This sequence of operation provides maximum safety in a dead front receptacle, as any arcing is isolated in a flame-tight and dust-tight chamber.

Certifications and compliances

BHR series:

  • Class I, Divisions 1 & 2, Groups B, C, D
  • Class II, Divisions 1 & 2, Groups F, G
  • Class III
  • NEMA 3, 4, 7BCD, 9FG, 12
  • ANSI/UL standard: UL1010

SRD series:

  • Class I, Divisions 1 & 2, Group D
  • Class II, Divisions 1 & 2, Groups F, G
  • Class III
  • NEMA 3, 7D, 9FG, 12
  • ANSI/UL standard: UL1010

Design features

  • Feature a built-in rotary switch which is operated automatically when the plug is inserted and withdrawn; the switch, capable of making and breaking the circuit at full rated load, is operated by a helical blade in the centre of the plug
  • The plug and receptacle contacts cannot be made or broken under load; when the plug is inserted, the plug and receptacle contacts engage before the switch closes; when the plug is withdrawn, the switch opens before the plug and receptacle contacts disengage; this sequence of operation provides maximum safety in a dead front receptacle; arcing is isolated in a flame-tight and dust-tight chamber
  • Operation is simple, safe and positive; to disconnect the portable device, the plug fastening ring is unscrewed and the plug simply pulled straight out; no separate interlock device or operating handle need be actuated
  • Positive engagement without mismatching is assured by a distinct physical polarisation of the plug and receptacle in every rating
  • Plugs are furnished with pressure terminations; receptacles are furnished with flexible leads for splicing to the supply conductors; a large threaded cover provides access to the wiring compartment
  • BHR assemblies are available for top, bottom or through feed conduit arrangements in 3/4" to 2" sizes
  • SRD back box is provided with 1-1/4" vertical through feed hubs

Standard materials

  • Receptacle housings – copper-free aluminium
  • Plug exteriors – copper-free aluminium
  • Back box (SRD series) – Feraloy iron alloy
  • Insulation – high impact glass filled phenolic
  • Contacts – brass