Carlo Gavazzi is introducing a new three-phase motor soft-starter with electronic motor overload protection, which can replace traditional Star-Delta (Wye-Delta) products with a single, compact module. The RSHL Smart soft-starter provides complete motor starting functionality in a 45mm-wide unit that can be DIN-rail mounted in space-conscious enclosures. Reliability and longevity are guaranteed by an all-electronic low power-consumption design and integrated heat sink.
Improved start/stop performance, a higher number of start cycles, electronic motor protection, monitoring and diagnostics make the RSHL Smart soft-starter an all-in-one option. Available in 220, 480 and 600V AC versions, it controls and protects three-phase induction motors rated up to 11kW such as those used in pumps, compressors, fans, hydraulic systems, conveyors and industrial machinery.
During normal operation the unit controls two phases, while the third phase is continuously connected to the load. Soft starting and soft stopping is achieved by controlling the motor voltage and, during normal running operation (
Soft starting and stopping characteristics can be programmed with nine customisable (time and shape) voltage ramping profiles offering ramp-up times to 20s, initial torque from 20 to 50 per cent and ramp-down times up to 10s. A current limiting starting option is also available.
A built-in, manually adjustable, electronic overload can be set for either a Class 10 or Class 20 trip characteristic, and for manual or automatic reset. The RSHL Smart soft-starter can also monitor motors for overheating (via a PTC input), phase loss, sequence and imbalance. As well as motor monitoring, the RSHL also monitors itself for overheating and internal failures. Eight LEDs on the front panel indicate the device status and alarms. In addition, there is an end-of-ramp auxiliary relay, and alarm auxiliary relay, and over-temperature protection.
All members of the RSHL family carry CE and RoHS marks, are cUL approved and rated to IP20 against dust and water ingress.