Need help wiring a 380v motor with switch and light bulb
Need help wiring a 380v motor with switch and light bulb
(OP)
I need help with a new machine design.
A customer is requesting a 380V 3-phase 50HZ 1HP motor on a machine. The motor will run a single speed for a grinding operation. They will be supplying 380V 3-phase.
Our machine also has a incandescent work light that typically matches/uses the input voltage supplied. What voltage and/or light bulb should I use for the work light? Do I need to step down voltage for the light, and if so, how would I go about doing this? (what is the common lighting voltage for 380V machines?)
Also the customer has requested a lighted on/off switch for the motor. I am searching for a possible switch but having no luck.
There is a possiblity that I can use a panel mounted indicator light that would signify the motor is powered on.
Any help would be much appreciated.
A customer is requesting a 380V 3-phase 50HZ 1HP motor on a machine. The motor will run a single speed for a grinding operation. They will be supplying 380V 3-phase.
Our machine also has a incandescent work light that typically matches/uses the input voltage supplied. What voltage and/or light bulb should I use for the work light? Do I need to step down voltage for the light, and if so, how would I go about doing this? (what is the common lighting voltage for 380V machines?)
Also the customer has requested a lighted on/off switch for the motor. I am searching for a possible switch but having no luck.
There is a possiblity that I can use a panel mounted indicator light that would signify the motor is powered on.
Any help would be much appreciated.





RE: Need help wiring a 380v motor with switch and light bulb
RE: Need help wiring a 380v motor with switch and light bulb
I do not think that your customer will be very pleased to find a 120 V outlet on his machine if he has 230 V hand-tools.
You should ask the customer about this. We can only guess.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Need help wiring a 380v motor with switch and light bulb
Is there a way to switch this small motor without a contactor? Is there a common switch that would handle the motor draw and safely disconnect all leads from the 380V?
I am assuming that when using a contactor for motor control in this situation, I could use the 120V circuit and switch to trip the contactor. This would also illuminate a motor on indicator light or illuminated switch.
RE: Need help wiring a 380v motor with switch and light bulb
RE: Need help wiring a 380v motor with switch and light bulb
As to the motor control, if this is a simple manual operation such as on a bench grinder, you will still need to provide running overload protection for the motor. You need to supply a simple manual motor starter. The type used in most IEC countries (meaning not North America) is a very simplistic manually operated device with a on-off button or switch like a light switch along with an adjustable overload trip element. Here is an example:
motor protectivce switch
RE: Need help wiring a 380v motor with switch and light bulb
Can someone please clarify one thing for me? Is it OK to tie the neutral to ground in this situation? Or will there be a seperate ground with the 3 phases and neutral?
RE: Need help wiring a 380v motor with switch and light bulb
respectfully
RE: Need help wiring a 380v motor with switch and light bulb
The TN-C system has a combined PE and N conductor and does not need two separate wires for PE and N (that's the reason for the "C" - as in Combined).
TN-C systems are a lot more common than TN-S (you guessed it, "S" stands for Separate). In both cases, there are two separate conductors going from the fuse-box to the machine.
The N is light-blue and the PE has yellow/green stripes. You are not allowed to connect anything current-carrying to the PE - all single-phase returns shall go to N.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Need help wiring a 380v motor with switch and light bulb
RE: Need help wiring a 380v motor with switch and light bulb
There's a good summary of the European harmonised colour code in this link:
ht
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Sometimes I only open my mouth to swap feet...
RE: Need help wiring a 380v motor with switch and light bulb
It will at least serve to bolster my wife's perception of my being "a fountain of useless information".
RE: Need help wiring a 380v motor with switch and light bulb
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Sometimes I only open my mouth to swap feet...