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| Transwave Static Converter gone phttttt |
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| John Swift:
Hi Bluechip , have a look at this link :- http://www.machinemart.co.uk/download/PC20-40-60-PHASE-CONVERTERS.pdf the circuit may help if you can't obtain the circuit for your converter John PS for a diy esr meter look here :-- http://mark-lawton.com/capacitor-esr-meter-project/ or http://mark-lawton.com/wp-content/uploads/2010/06/ESR-Capacitor-Meter-Project.pdf |
| awemawson:
--- Quote from: Bluechip on June 13, 2012, 05:28:23 PM --- --- Quote from: awemawson on June 13, 2012, 05:17:30 PM ---Give Transwave (Power Capacitors Ltd) a call - they are a very helpful company to deal with. The usual Transwave static generates the third phase as per the diagram posted above, but also has a voltage sensitive relay made by Broyce Controls lookiing at the generated phase. When up to volts it switches out the start bank of capacitors leaving the run bank connected --- End quote --- Thought about phoning them, there is an LED [?]on the relay that comes on, but as soon as the start button is poked on the lathe, it instantly drops out, as does the other [ Siemens ] contactor. Depends if that is the faulty component. I've no idea if it is, or whether it's just a symptom.. there are 3 caps in there, I have a Peak LCR meter which will give a good idea if the caps are OK, although I would think it's not a good tool to use on motor run caps. Works fine on electronicy stuff, but only gives the capacitance, not the ESR or anything useful. BC --- End quote --- Give them a call. Years ago I had a Transwave static converter that failed - they sent me a circuit diagram and the Broyce VS relay foc despite the converter being 3 years old. Since then I've had a 7.5 HP and a 20 HP rotary which both ran faultlesly - now I have genuine 3 phase. I've not heard good reports of the Clarke converters, and I notice from the circuit posted in the link above instead of a proper voltage sensitive relay they are using a normal relay via a bridge rectifier so no settable trip point. |
| Bluechip:
Woe, woe and thrice woe ... One of the motor connections has failed anyway ... :Doh: Now sorting that out, whether it has taken out the Transwave or not .... ???? BC |
| John Swift:
Hi Bluechip , with luck , once the motor wiring has been repaired, the relay may well hold in as normal John |
| Bluechip:
--- Quote from: John Swift on June 14, 2012, 05:59:45 AM --- Hi Bluechip , with luck , once the motor wiring has been repaired, the relay may well hold in as normal John --- End quote --- Indeed it does, John .... we have a runner. :ddb: :ddb: Wrong rotation at the mo', but I expected that. Don't think I've ever had a motor run the correct way first time ... :scratch: Rebuilt the connections ... what a crappy arrangment. Now has some 2BA CH screws and nuts Loctited in ... now possible to tighten connections ... Many thanks for the contributions gents ... BC |
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