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jan1977
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Joined: 27-March 09
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Last Seen: 27th March 2009 - 03:12 PM
Local Time: Mar 14 2010, 08:14 AM
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27 Mar 2009
Need some hints on how to build a two-speed starter.
Am I correct here? : (Fan/440V/12,5A High speed) The wiring of the starter is very much alike star/delta starting; 3 contactors are needed, but 2 O/L relays. Main contactor needs to have an O/L relay for low speed, and during low speed the star contactor will be closed. For high speed I will open the star contactor, and close the "delta" contactor, which also needs an O/L relay. Is it this simple? Only difference would be the 2nd O/L relay - or do i need the 2nd at all? I assume its a single-winding motor. If we have a 2-winding motor, how should I wire this? Jan QUOTE (jan1977 @ Mar 27 2009, 03:42 PM)  Need some hints on how to build a two-speed starter.
Am I correct here? : (Fan/3phase/440V/12,5A High speed) The wiring of the starter is very much alike star/delta starting; 3 contactors are needed, but 2 O/L relays. Main contactor needs to have an O/L relay for low speed, and during low speed the star contactor will be closed. For high speed I will open the star contactor, and close the "delta" contactor, which also needs an O/L relay. Is it this simple? Only difference would be the 2nd O/L relay - or do i need the 2nd at all? I assume its a single-winding motor. If we have a 2-winding motor, how should I wire this? Jan |
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Lo-Fi Version | Time is now: 14th March 2010 - 07:14 AM |
