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The Wife Wouldn't Let Me Buy One...........
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<blockquote data-quote="OnOff" data-source="post: 388495" data-attributes="member: 16173"><p>Feel free mods to move to the Student section as I might be asking numpty questions here:</p><p></p><p>So, I'm lashing together this electric wacker plate. Using a scrapped (I've now repaired) 3-phase motor, this is the plate:</p><p></p><p>[ATTACH]5808[/ATTACH]</p><p></p><p>Now, in my day job I only now ever deal with 3-phase motors off a 400V supply, mainly star, some double star wired and the odd delta. Everything is on an inverter too. Years back did a lot on 230V single phase capacitor start / run stuff but not any more.</p><p></p><p>I'm connecting the above motor up in delta as per the circuit below. Basically hold in the Start button until it's up to speed then let go, back feed thru the cap keeps the coil closed:</p><p></p><p>[ATTACH]5809[/ATTACH]</p><p></p><p>Current through the Start and what will be permanently in circuit Stop button is my concern. All the NO/NC contact blocks I have are rated 3A. I assume I'll only be pulling 3.2A at full load (as there's only one phase)? But start up (and stall currents) will be higher. Thinking to maybe double up and put the contact blocks in parallel or run through another contactor?</p><p></p><p>Just roughing it out for fit:</p><p></p><p>[ATTACH]5810[/ATTACH]</p><p></p><p>[ATTACH]5811[/ATTACH]</p><p></p><p>Cheers</p></blockquote><p></p>
[QUOTE="OnOff, post: 388495, member: 16173"] Feel free mods to move to the Student section as I might be asking numpty questions here: So, I'm lashing together this electric wacker plate. Using a scrapped (I've now repaired) 3-phase motor, this is the plate: [ATTACH]5808._xfImport[/ATTACH] Now, in my day job I only now ever deal with 3-phase motors off a 400V supply, mainly star, some double star wired and the odd delta. Everything is on an inverter too. Years back did a lot on 230V single phase capacitor start / run stuff but not any more. I'm connecting the above motor up in delta as per the circuit below. Basically hold in the Start button until it's up to speed then let go, back feed thru the cap keeps the coil closed: [ATTACH]5809._xfImport[/ATTACH] Current through the Start and what will be permanently in circuit Stop button is my concern. All the NO/NC contact blocks I have are rated 3A. I assume I'll only be pulling 3.2A at full load (as there's only one phase)? But start up (and stall currents) will be higher. Thinking to maybe double up and put the contact blocks in parallel or run through another contactor? Just roughing it out for fit: [ATTACH]5810._xfImport[/ATTACH] [ATTACH]5811._xfImport[/ATTACH] Cheers [/QUOTE]
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