We have had motor and or vfd failures when customers use 2 legs of a 208 vac 3 phase system to supply our machines....
we state 230 single phase 4 wire
I know there are phase issues, etc but trying to explain that to my bosses is difficult....
Help?
we have a customer that has a 2" diameter sch 40 pipe at 10 psi, it runs well over 100' with lots of elbows, etc.
then it is stepped down to 1-1/4" diameter reducer to a pressure regulator, to drop the 10 psi down to 7" wc (which we recommend doing it in 2 stages) and the outlet is 1-1/4" to...
I have an dryer, that runs on 220 1ph 60hz with a neutral (2 hots, 1 neutral). And they want to be able to take that unit and be able to use that same unit in Europe (which is 230 1ph 50hz - 1 hot and 1 neutral).
From what is understand, it cannot be done easily thru a transformer. And...
Working on a project with a pulsed output, 50 ms on 50 ms off
stays high on pulse is done
ex. if i have 5 pulses i want to trigger a relay for 5 minutes
if i have 1 pulse, the relay would be active for 1 minute, etc
Is there such an animal without going to a plc?
Paul
controlling a simple fluorescent light (max draw on startup is 0.9 amps), we have been using a 7 amp light breaker switch for eons, anyways the 7 amp version is back ordered, but we have 10 amp versions in stock
should i be looking at a 3 amp or can i look at it like house wiring, where i have...
we have an application that has 1 temp controller and 2 modulating valves.
1 valve is 6 feet from the controller, the 2nd is 25 feet from the controller
not having been involved in this design, i was asked to see why 1 valve was behaving proper, but the one further away was not working at all...
Unfortunately i have run into a host of terrible comm issues between 2 vendors - standard rs232 (whatever standard is)
now, i have a linear servo motor controller, ethernet, rs232, windows xp software compatible
i have tried a plc/touch screen (which i am ready to throw out)
A simple 2...
I am specing out a linear motor.
there is going to be a lot of fine ferrous metal particles and i am concerned with the magnetic properties of some of the drives, that the motor will be a huge magnetic science experiment.
Has anyone had experience with this?
Thanks in advance
PA
this is for a programmable controller.
in order to select 1 of 4 available programs, we need to have a 4 position rotary switch and provide 00 01 10 11 binary output.
of course the controller supplier cannot specifically tell us what to purchase
i have looked a rotary BCD's rotary dips etc...
There has been a concerned raised regarding the placement of a snap disc temperature control switch should be.
We are using a standard temp controller
on one side of a n/o set of contacts is a timer and the other side is an SSR connected to a heating element
main power feeding the controller...
We have seen some 1650 watt heaters that run on 110 vac.
That is 15 amps of draw.
I thought legally you could only have 12 amps of current draw on a standard outlet. i.e. 12 amp vacuum cleaner
Unless you installed 12 ga. wiring and 20 amp breaker.
Is this wrong?
Paul
I am trying to calculate what wattage heating element should be used to heat air from 65 deg F to 190 deg F in 3 to 5 minutes. The volume of air is 20 cubic feet. It is totally enclosed and insulated. There is an internal circulating fan to "move" air around the chamber.
I have quickly...
We had an issue back tracing some wires through a terminal strip. There are 4 - single phase 110Vac 2 pole motors, each hot wire connected to an individual terminal.
Neutral/Common are all connected on a busbar.
What occurred when i did some continuity tests with a multimeter, was if i put 1...
Good morning,
1) Is it normal for a 1/2 HP TENV single phase motor to run 320 degrees fahrenheit under no load and is it a fair comparison to test a motor under no load?
2) If a motor runs this hot and it is considered normal, wouldn't using high temperature insulated wire be prudent?
3)...
