Load (test) resistors are used to create an artificial electric power load of generators. They simulate the load (electrical resistance) for different types of current sources (generators, batteries, photovoltaic cells, etc.) enabling testing of those sources under specific load.
A wide application of load resistors is testing of emergency power generators, which must be periodically checked under load. By using a load resistor, you can load the generator in various ranges of its power. Such resistors may be mobile, e.g. on a trailer, or transported by a delivery van or stationary, permanently connected to the generator.
In the second case, in addition to providing the minimum load for the generator, they also perform functions of the device testing the resistor efficiency, checking it from time to time. Most often, load (test) resistors are designed for specific needs of the recipient.
Application of load (test) resistors of emergency power supply:
- load resistors for laboratories, construction centers
- load resistors for small hydro and gas power plants
- test resistors at generator control stations
- load resistors for generators
- ballast resistors of emergency generation sets
- discharge resistors of a capacitor batteries
At SIMPAX, we have technology and engineering experience that allow us to design and manufacture a test resistor for all generators’ parameters and with the possibility of adjustment. We produce load resistors for generators in mobile and stationary versions. Due to the function of the test resistors, most of them are mobile designs, where the resistor is only supplied for the duration of the tests.
We design using advanced 3D modeling! In a short time, we are able to design any resistor corresponding to individual requirements (see the detailed parameters tab).
Range of load resistor parameters
|Operating voltage:||400VAC – other voltages available|
|Power:||100kW - MW|
|Possible power drops caused by the increase of resistance due to temperature:||Approx. 2%|
|Tyoe of operation:||Continuous or instantaneous (even for several seconds)|
|Type of cooling:||Forced by a 400VAC fan|
|Type of design:||Stationary or mobile, horizontal or vertical|