Grid Elements

Service grids

  • Modular
  • Shock and vibration resistant
  • Range of standard enclosures
  • Specifically designed for motor control

Service grids are a robust flat plate style of resistor manufactured from 304 grade stainless steel elements insulated using mica and welded together to form a continuous low inductance resistance path. Service grid resistors can be supplied as either open banks or housed in ventilated enclosures.

Every grid has punched holes within the welded contact section to give intermediate tapping points.



There are two standard enclosure styles for service grid resistors; Industrial Housings for general purpose applications and System 22 Housings designed for steel mills, this allows the replacement of individual banks without disturbing other banks in the enclosure.

Either type of enclosure can be supplied as painted mild steel, hot dip galvanized to BS729 or natural finish grade 304 stainless steel.

HPR Grids

  • Versatile, robust construction
  • Good for continuous and short-term ratings
  • High ratio of surface area to active mass
  • Widest range of resistor materials


EN Grids

  • Best for force cooling
  • Excellent under vibration
  • All-welded connections
  • Fully automated manufacture