380V/60HZ/3PH POWER SUPPLY 1

[chef5mate]

Hi, an electrical stub out says 380v/60hz/3ph.
Which of the machine voltage ratings below are acceptable/recommended?
3 × 200 V, 50/60 Hz
3 × 220 V, 50/60 Hz
3 × 230 V, 50/60 Hz
3 × 400 V, 50/60 Hz
3 × 420 V, 50/60 Hz
3 × 460 V, 50/60 Hz
These are the only voltage available for the said machine.
Appreciate your help.

 

[zlatkodo]

(waross): Member of the Eng-Tips Forums Round Table, where management is advised on site operations and proposed programming enhancements
and also the owner/moderator of some Eng-Tips Group

It's good to know.
Someone might think that you are the moderator/owner of this forum as well not just ordinary member as others.

 

[waross]

No. Neither owner nor moderator of this forum.
Been here a long time though.
The forum that I do own is very well behaved.
I typically go for years between reasons to step in as moderator.
When I do step in it's usually a spammer, and the Red Flag reporting system often catches those before I see them.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

 

[chef5mate]

pardon me @che12345...

replying to your "1. No. Your system is 380V. Say + - 10% i.e. Hi 380V x 1.1 = 418V, or Lo 380V x 0.9 = 342V. How do you get 420V (+10%)?"
i got it from the options below:
3ph × 200 V, 50/60 Hz
3ph × 220 V, 50/60 Hz
3ph × 230 V, 50/60 Hz
3ph × 400 V, 50/60 Hz
3ph × 420 V, 50/60 Hz
3ph × 460 V, 50/60 Hz
factory advised they do have a motor voltage rated at 420v/60hz/3ph.
thus, can we opt for the 420v/60hz/3ph motor rating for my future reference?

i already specified the 400v/60hz/3ph from my order specs.

thank you once again @che12345

 

[chef5mate]

@waross...yeah i saw it...thanks

 

[chef5mate]

@waross...i looked and found a complete list of codes for the representation of names of countries and their subdivisions

https://www.ip2location.com/free/country-information

for everyone's info

thank you

 

[che12345]

@ Mr chef5mate (Mechanical)(OP)27 Aug 24 09:06
'..factory advised they do have a motor voltage rated at 420v/60hz/3ph. can we opt for the 420v/60hz/3ph motor rating for my future reference?'
1. Your system is 380V. Say +- 10% i.e. Hi 380V x 1.1 = 418V, or Lo 380V x 0.9 = 342V.
2. A 420V +- 10% motor, Hi 420V x 1.1 = 462V, LO 420V x 0.9 = 378V.
3. From above 1. and 2. , a 420V motor would be fine at 378V. If the 380V system goes up would be OK, but NOT down.
4. Attention: Although IEC, NEMA, ANSI, IEEE design motors are acceptable at +- 10% voltage tolerance, but the BEST performance would be at the rated Voltage.
5. BTW: In SI unit, 420v/60hz should be 420V/60Hz.
Che Kuan Yau (Singapore)

 

[chef5mate]

Thank you Mr. Che Kuan Yau...appreciate your usual prompt response.