RESISTORS FOR WIND TURBINES
For over ten years IRE has been successfully producing resistors for very difficult environments, such as GALVANIZING, FOUNDRIES, MINES, PORTS AND OFF-SHORE PLANTS. These resistors, made of metal enclosure with IP23 degree of protection, contain low thermal hysteresis elements, RPTM or GHPR resistors, treated with an exclusive process, which gives them a high resistance to corrosion.
Experience in this field has led to the recent development of an ad hoc solution successfully used in WIND TURBINES applications.
In fact, wind plants need resistors, called "ballast", to dispose of excess production in the event of too strong wind, which are able to:
- dissipate strong powers for very long times;
- operate outdoors to avoid overheating the rooms where the generator system controls are located.
Hence the need for resistive elements with a high degree of protection, together with the need to maintain the stabilization temperature within acceptable limits (in any case greater than 180 ° C) while absorbing energy for long times: it results in a surface-to-power ratio smaller than 1 watt / cmq and therefore a resistor of significant volume and cost.
Building on the growing demand for greater compactness and economy, IRE has developed an innovative solution with an excellent price / performance ratio. The IP23 protection rating box is equipped with a double roof designed to favor natural convective motion while preventing rain from reaching the resistors inside. The resistors, which have the optimum surface power ratio for the described application, are fully protected by several layers of paint guaranteed for continuous operation at 600 ° C and suspended from ground by massive insulators, while terminals are segregated in an IP55 junction box. The combination of these measures has given rise to a solution that contains at most the dimensions ensuring high reliability even in the presence of fog and / or high humidity in environmental conditions compromised by low pressure.