Leroy Somer power alternators, with capacities up to 20 MW, are suitable for all drive systems - whether for supplying electrical power on board a ship, electricity to deprived regions, or for preventing interruptions in the mains supply.
"The company has made a substantial investment in technology to meet increasing energy requirements, with the greatest respect for environmental constraints," says Grant Robertson, managing director of Leroy Somer SA. "The AREP excitation system is a brushless, self-excited system known for its efficient performance and enhanced safety. It enables a short circuit current of about three times the rated current to be maintained for 10 seconds. This means that a circuit breaker can be tripped if there is a fault, without disturbing other loads supplied by the alternator."

These alternators are designed for vertical or horizontal installation, with special features for excellent mechanical withstand. A gearbox can be mounted to adapt to the speed of the drive system. The method of cooling can be modified for each specific application - in conventional applications air cooling is effective, while in harsh environments like marine applications, protection is provided by air/water exchangers.

Special bearings are selected depending on the specific application of the alternator. The size and type of bearing installed - ball bearing or sleeve bearing - is determined by the drive speed and the weight of the rotating part, as well as environmental and maintenance constraints. Frequency of lubrication of these bearings also depends on the application. Temperature and current measurement points on the windings enable efficient monitoring of electrical components. In addition, mechanical parameters, like vibration, temperature of the bearings and overspeed can also be monitored.
Leroy-Somer SA
+27 455 6212