Star Delta Starting is one of the methods of starting 3-Phase pump-sets. In Fully Automatic version of Star-Delta (FASD) Starter, the changeover from star winding to delta winding is done with the help of a timer. L&T Electrical & Automation (E&A) offers two variants of FASD – called starters and controllers.
FASD starters are basic electrical starters with contactor and relay combination for ON-OFF operation and overload protection of the pump-sets. Over and above the ON/OFF operation and overload protection features equipped in Controllers, it also provides additional features like Auto ON, indications of Supply ON/OFF and Pump ON/OFF, reading of real time voltage & current of pump with unique Dual analog meter. Single phasing protection relay (SPPR) inside Controller unit provides the advanced protection features viz. single-phasing prevention, phase-reversal protection, phase-unbalance protection, variable time-delay adjustment for delayed operation of pump set.
FASD Starters:
- MK1 FASD – with MK1 contactors, MK1 relay and GT200 timer
- MU FASD – with MU contactors, MU relay and ST100 timer
- MB FASD – with MU contactors, MN relay and ST100 timer
- ML FASD – with ML contactors, ML relay and ST100 timer
Controllers:
- MU-G15 – with MK1 contactors, MK1 relay and SDz5 (SPPR + timer)
- MU-G20 & MU-G20H – with MU contactors, MU relay and SDz5 (SPPR + timer)
- MU-G30 – ML contactors, MN relay and SDz5 (SPPR + timer)
- MU-G50 - ML contactors, MN relay and SDz5 (SPPR + timer)
- MU-G75 - ML contactors, MN relay and SDz5 (SPPR + timer)
