Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Heat Gain from Equipment

Heat gain from switchgear, transformers, motors and more

Sponsored Links

Heat gain from some typical electrical equipment are indicated below: 

Transformers

  • 150 kVA and smaller : 50 Watts/kVA
  • 150 - 500 kVA : 30 Watts/kVA
  • 500 - 1000 kVA : 25 Watts/kVA
  • 1000 - 2500 kVA : 20 Watts/kVA
  • larger than 2500 kVA : 15 Watts/kVA

Switchgear

  • Low voltage breaker 0-40 Amps : 10 Watts
  • Low voltage breaker 50-100 Amps : 20 Watts
  • Low voltage breaker 225 Amps : 60 Watts
  • Low voltage breaker 400 Amps : 100 Watts
  • Low voltage breaker 600 Amps : 130 Watts
  • Low voltage breaker 800 Amps : 170 Watts
  • Low voltage breaker 1600 Amps : 460 Watts
  • Low voltage breaker 2000 Amps : 600 Watts
  • Low voltage breaker 3000 Amps : 1100 Watts
  • Low voltage breaker 4000 Amps : 1500 Watts
  • Medium voltage breaker/switch 600 Amps : 1000 Watts
  • Medium voltage breaker/switch 1200 Amps : 1500 Watts
  • Medium voltage breaker/switch 2000 Amps : 2000 Watts
  • Medium voltage breaker/switch 2500 Amps : 2500 Watts

Motor Control Centers

  • Section : 500 Watts per section
  • Low voltage starters size 00 : 50 Watts
  • Low voltage starters size 0 : 50 Watts
  • Low voltage starters size 1 : 50 Watts
  • Low voltage starters size 2 : 100 Watts
  • Low voltage starters size 3 : 130 Watts
  • Low voltage starters size 4 : 200 Watts
  • Low voltage starters size 5 : 300 Watts
  • Low voltage starters size 6 : 650 Watts
  • Medium voltage starters size 200 Amp : 400 Watts
  • Medium voltage starters size 400 Amp : 1300 Watts
  • Medium voltage starters size 700 Amp : 1700 Watts

Variable Frequency Drive

  • Variable frequency drive : 2 - 6% of kVA rating
  • Bus duct : 0.015 Watts /ft Amp
  • Capacitors : 2 Watts / KVAR
Sponsored Links

Related Topics

Related Documents

Tag Search

  • en: heat gain equipment switchgear transformers motors
Sponsored Links

Search the Engineering ToolBox

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

Translate this page to
About the Engineering ToolBox!
.

close

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Scientific Online Calculator

Scientific Calculator

1 19

Sponsored Links