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Control & Circuit Breakers

1. Explosionproof Variable Frequency Drives
Highly flexible AC drives designed specifically for hazardous area locations. These drives can be mounted next to the motor in the classified area, providing significant installation cost savings.


  • For speed control of pumps, compressors, fans, conveyors, separators, mixers, and other process equipment.
  • Designed to meet the high reliability and safety requirements of process industries such as oil and gas, chemical and mining.
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2. Spectrum TM EBM Enclosures

Spectrum EBM-E series of hinged cover motor control enclosures are used:
  • for general motor control and circuit protection – indoors and outdoors – in damp, wet, dirty, dusty hazardous locations without the need for a protective shelter.
  • in areas where frequent washdowns are necessary or where heavy rain or water spray is prevalent.
  • for across-the-line starting and stopping of polyphase ac induction motors.
  • to provide line disconnect means and short circuit protection (EBMC).
  • to provide motor overload and undervoltage protection.
  • for feeder or branch circuit protection for lighting, heating, appliance, and motor circuits (EBMC).
  • on switchracks or other assemblies where it’s desired that motor control be centrally located.

3. Switch Rack Assemblies


Free-standing switch rack assemblies are used:
  • to provide a complete motor control center in one integrated package.
  • outdoors and indoors.
  • in damp, wet or corrosive locations such as sewage treatment plants, lumber mills, marine installations, and food preparation areas.
  • in areas made hazardous due to the presence of flammable vapors or gases, such as petroleum refineries, chemical and petrochemical plants, gas gathering plants, pipeline compressor stations, and drilling rigs, both onshore and offshore.
  • in areas where hazardous dusts are present, such as coal handling facilities, grain processing and handling plants, and certain food process industries.

4. Factory Sealed Control Devices and Manual Motor Starting Switches

Factory sealed enclosures are installed in a rigid metallic conduit system for surface mounting adjacent to or remote from equipment being controlled and are used:
  • to prevent arcing of enclosed device from causing ignition of a specific hazardous atmosphere or atmospheres external to the enclosure.
  • in industrial areas such as chemical plants, oil and gas refineries, paint and varnish manufacturing plants, gasoline bulk loading terminals, grain elevators, grain processing industries, coal processing or handling areas, or metal handling or finishing areas where atmosphere may contain hazardous gases and/or dust.
  • in non-hazardous areas where sturdy, durable enclosures are required.
  • in conjunction with magnetic starters or contactors for remote control of motors Manual motor starting switch enclosures are used:
  • for manual starting of small ac or dc motors.
  • to provide manual starting and stopping and, in the case of units with heaters, motor running protection.
a) EDS & EFS Pushbutton

b) EFS Pilot Light

c) EDS Combination Pushbutton &
Pilot Light Station

d) EDS & EFS Selector Switch

e) EDS Snap Switch

f) EDS Manual Motor Starting Switches

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