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What are the separate parts required to build up star delta starters for motors 7.5kW through to 132kW suitable for mounting on DIN rail?
The table below indicates the selection of the power switching components necessary to build up a star delta starters, with mechanical interlocks between star and delta contactors, suitable for mounting on DIN rail in a suitable control panel.
Notes:
In some cases, the starter can be supplied assembled (prefix LC3 ) with the overload relay supplied separately. These should be checked on a case-by-case basis, as some are obsolete.
Overload selection is based on the motor full load current (FLC) x 0.58 due to the mounting position in the 'delta loop'.
In the case of 110 and 132 kW there is a requirement for a separate control relay and timer to ensure sufficient delay in the changeover time from star to delta contactor.
The below drawing is an example of how a Star-Delta starter could look.
Notes:
In some cases, the starter can be supplied assembled (prefix LC3 ) with the overload relay supplied separately. These should be checked on a case-by-case basis, as some are obsolete.
Overload selection is based on the motor full load current (FLC) x 0.58 due to the mounting position in the 'delta loop'.
In the case of 110 and 132 kW there is a requirement for a separate control relay and timer to ensure sufficient delay in the changeover time from star to delta contactor.
The below drawing is an example of how a Star-Delta starter could look.
Released for:Schneider Electric Ireland
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