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Siemens Soft Start


cds9044

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Need help with Siemens 3RW3024-1AB14 soft start. After installation, we pushed start button and 480 volt motor will not work. We measured 280v from each phase to ground, but we are not getting 480v phase to phase. Incoming voltage is correct. Control voltage is 120v and motor is 5hp serving an overhead crane. This soft start is replacing a Benshaw LTS controller that has gone bad. Any help would be greatly appreciated.

 

Thanks,

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Need help with Siemens 3RW3024-1AB14 soft start. After installation, we pushed start button and 480 volt motor will not work. We measured 280v from each phase to ground, but we are not getting 480v phase to phase. Incoming voltage is correct. Control voltage is 120v and motor is 5hp serving an overhead crane. This soft start is replacing a Benshaw LTS controller that has gone bad. Any help would be greatly appreciated.

 

Thanks,

 

Describe what you mean by "close the start button". What is the start button wired to?

 

On the 3RW30, you need to first close any upstream contactor, then you must also power control board and close the control circuit between control terminals A1 and IN1. You must also have the other half of your control circuit connected to control terminal A2. So for example if you are using 120V control, you would wire the hot of the 120V control power to A1, a Start / Run command between A1 and IN1, and the neutral to A2.

"He's not dead, he's just pinin' for the fjords!"
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Describe what you mean by "close the start button". What is the start button wired to?

 

On the 3RW30, you need to first close any upstream contactor, then you must also power control board and close the control circuit between control terminals A1 and IN1. You must also have the other half of your control circuit connected to control terminal A2. So for example if you are using 120V control, you would wire the hot of the 120V control power to A1, a Start / Run command between A1 and IN1, and the neutral to A2.

 

 

Thanks for your input. We didn't have control wiring connected properly and have corrected the problem. Works fine now.

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