Control & Relay Panel
Power Resistors
Traction Resistors
Bus Duct
Crane/ Motor
   Control Resistors
Cable Tray
Fabricated Items
Basic Parameters for Resistors Design ConsiderationConstruction of a Resistance Unit
Characteristics of Different types of Material used for of Resistance
Different Types of Resistance Grids
While designing the resistance elements and enclosures following considerations are kept in mind:

  • Degree of protection as per IS: 2147
  • Outdoor / Indoor
  • Duty rating as per BS: 587
  • Ambient temperature of surroundings
  • Permissible temperature rise above the ambient temperature
  • Environmental and site condition
  • Voltage rating
  • Natural / forced cooling
  • Current rating & Ohmic value according to application
  • Material of resistance, resistivity and temperature co-efficient
  • In case of Motor Control; Speed torque curve is also considered
  • Any other special requirement of customer
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