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Siemens Soft Start |
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 Dec 16 2008, 06:02 PM
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#1
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Junior Member  Group: Members Posts: 2 Joined: 16-December 08 Member No.: 5,029  |
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.
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Dec 17 2008, 07:17 AM
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#2
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 Posting Freak Group: Moderator Posts: 668 Joined: 22-February 03 From: USA, California Member No.: 285 |
QUOTE (cds9044 @ Dec 16 2008, 10:02 AM)  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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Dec 17 2008, 01:13 PM
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#3
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Junior Member Group: Members Posts: 2 Joined: 16-December 08 Member No.: 5,029 |
QUOTE (jraef @ Dec 17 2008, 07:17 AM) 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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Dec 19 2008, 11:42 PM
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#4
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Posting Freak Group: Moderator Posts: 668 Joined: 22-February 03 From: USA, California Member No.: 285 |
QUOTE (cds9044 @ Dec 17 2008, 05:13 AM) Thanks for your input. We didn't have control wiring connected properly and have corrected the problem. Works fine now. Glad to here it. -------------------- "He's not dead, he's just pinin' for the fjords!"
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