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Soft starters deliver more starts per hour

Aldershot, UK, 27 June 2007 – Carlo Gavazzi is introducing a new family of soft starters that combines a built-in bypass contactor with an external heat sink for optimal performance. Applications include fans, blowers, pumps, conveyors, granulators, mixers and shredding machinery, lathes, carousels, cranes, industrial dryers and washing machines as well as car washes.

Compared with existing devices on the market, the RSHR-MIDI starters offer an increased number of starts per hour. Three-phase motors up to 400V/18A can make up to 50 starts per hour and 250 starts/h are possible on 2.2kW motors. The overall range spans 1.5 to 22kW, comprising 6, 12 and 18A versions with 220, 400, 480 and 600V AC voltage models. A 110-530V AC option provides global coverage for multiple voltages.

RSHR models control two phases only, with the third phase continuously connected to the load. Soft starting and stopping are achieved by controlling the motor voltage using semiconductor devices. During running operation these semiconductors are bypassed by internal electromechanical relays. Starting and stopping time as well as initial torque can be independently adjusted by built-in potentiometers with rotary controls. The result is vibration-free starting with a dramatic reduction in mains dips and lamp flicker.

Din rail mounted and only 45mm wide, panel builders can install the soft starter in the same space as existing models to provide up to 36% higher rated outputs. The units also have built in heat sinks allowing them to be mounted side by side.

Coloured lamps on the front panel alert the operator to power-on, ramping, bypass and overheat status. There are also optional over-temperature protection, end-of-ramp alarm output relays providing further flexibility for closed-loop control systems.

Standards compliance is assured through conformity to IEN 60947-4-2 and EMC Directive 89/336/EEC. The new starters carry CE marking, UL and cUL approvals and can be CSA approved if required.

About Carlo Gavazzi

Carlo Gavazzi's Automation Components Business Unit comprises five international production sites, sensors, switches, control, safety and fieldbus, which design and manufacture electronic control components from factories located in Denmark, Italy and Malta. The products provide automation solutions for machinery, equipment, plants and buildings. The products are marketed across Europe, North America and Asia through a network of 17 wholly-owned Carlo Gavazzi sales companies and in other countries by more than 40 independent national distributors. Carlo Gavazzi has its operational headquarters in Italy, and financial headquarters in Switzerland as it is quoted on the Zurich stock exchange.

Carlo Gavazzi UK Ltd, 7 Springlakes Industrial Estate, Deadbrook Lane
Aldershot
Hampshire GU12 4UH.

Tel: +44 (0) 1252 339600
Fax: +44 (0) 1252 326799
Web: http://www.carlogavazzi.co.uk

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