Is it possible for an unbalanced 3 phase power supply to damage a properly rated starter/overload? What exactly is the problem that may be caused by an unbalanced power supply?
I have a problem with the supply voltage not only being more than 10% out of the 230 +/- 10% rule but with varying...
In order to use a solenoid in a system that is powered by 480vac, we will be using a 480/240 transformer since we cannot find a 480v solenoid. Does this sound like it may be a problem to anyone? What things should I consider?
Mark
We are using a 250VA xxx/120 transformer in a system to supply the 120vac for various components. The various components, although not continuously, draw approximately 3a during normal use, maybe around 8a total for short periods (under 3 min).
I'm figuring that the 250va transformer at 120 is...
I created a 220vac circuit where I'm using relay contacts to swtich on/off a valve and a motor contactor. Is there a way I can effectively 'debounce' the contacts using a small inductor or something? The coils of the relays are 'controlled' by other switches. I will gladly put the schematic...
sorry if this is posted, I'm sure it probly is, but didn't find anything...
I've inherited a bunch of drawings of which part are motor control cktry...typical input power-motor contactor-overload however, they all have fuses on all 3 phase wires before the contactor/overload. I knwo NEC says...
When selecting a 220vac relay, I notice that htey all have an extremely low current rating...generally around 9mA...are these generally fused? Using the max fuse size of 300X doesn't even come near the typical low fuse value of .063 (1/16a).....I'm swiching the relay on through a limit switch...
in a typical 230vac 3-phase circuit with a motor contactor and overload and disconnect, where is a 3-phase monitor generally placed in relation to these items? I would guess before the disconnect, but I've guessed before on things.
Apparently, military power generators are less than accurate. I have a situation where there's a 220vac 3phase motor being run by (approx)247vac and the motors are burning up....what would be the most reasonable (cheap, simple, easy to explain)way to reduce the voltage? I'm guessing I can't...
I know this has had to have been asked before, but I cannot find it....matter of fact I remember reading something like this very recently....
Are there going to be any ramifications of running 208/230vac in the same conduit as a 24VDC proximity sensor wire pair. I don't think either is...
Is it possible without knowing much about codewriting, to extract single command data from rs485 comms and, say, use the single command info discretely?
Mark
I know this one is a little out there, but thought I'd try...at my company, we have a stand alone cd player that is used for music for people on hold. It is (was before I got here and no one here knows, etc..) wired from the headphone jack into 2 wires on the connector strip (the switch?) but...
Hello....most likely a rudimentary stupid question I'm just not getting....
Got about a 10v (DC) increase on the output of a rectifier/transformer when I put a cap across it...
Prim 110 I think
Sec. 24vac to rect. dc
how could this be? I believe the cap is rated for 40V.
