Magnum MSH 3012
Our inverter bought and installed in our FW in USA and since bought back to Australia was not passing power trough or charging batteries when supplied 110V with a step down transformer, I contacted M...
Forum Discussion
When I adapted 400Hz mil-spec equipment to 60Hz I had a chance to play around.
Enough of a chance to see with my little old two eyes, relays, especially PCB relays that would not pull in at specified voltage at 50Hz. A 120 volt coil relay would demand somewhere in the neighborhood of 134 volts on the coil to develop sufficient magnetics to pull the contacts.
400 Hz relays were easier. Convert to straight DC with an aluminum shading ring disc atop the coil.
The issue: Do the shading ring well enough to provide sufficient pull in while avoiding overheating of the relay coil winding and underpowering which would turn the relay into a buzzer at insufficient meaning deficient AC voltage Comprende?
Substitution of a like PCB mounting pattern 30-amp relay is a matter of asking and finding out WHICH relay part numbers are reliable performers with 50 Hz.
Slownsy, you -could- try contacting the US Federal Trade Commission in Washington D.C. and see what kind of reaction you get from them. If they should extend themselves to telephone the manufacturer I guarantee things will happen. Sort of like Dracula getting a midnight phone call from a garlic wholesaler. I would be prepared to FAX relevant documents to Washington DC.
I hope you can resolve this without getting a coronary.
Enough of a chance to see with my little old two eyes, relays, especially PCB relays that would not pull in at specified voltage at 50Hz. A 120 volt coil relay would demand somewhere in the neighborhood of 134 volts on the coil to develop sufficient magnetics to pull the contacts.
400 Hz relays were easier. Convert to straight DC with an aluminum shading ring disc atop the coil.
The issue: Do the shading ring well enough to provide sufficient pull in while avoiding overheating of the relay coil winding and underpowering which would turn the relay into a buzzer at insufficient meaning deficient AC voltage Comprende?
Substitution of a like PCB mounting pattern 30-amp relay is a matter of asking and finding out WHICH relay part numbers are reliable performers with 50 Hz.
Slownsy, you -could- try contacting the US Federal Trade Commission in Washington D.C. and see what kind of reaction you get from them. If they should extend themselves to telephone the manufacturer I guarantee things will happen. Sort of like Dracula getting a midnight phone call from a garlic wholesaler. I would be prepared to FAX relevant documents to Washington DC.
I hope you can resolve this without getting a coronary.
