380v Xfrmer

[Toros]

Hi
I nave a chiller operating at 380v, 3 ph
any recommendation for transformer???/

thank you

 

[jumper]

Supply voltage?

Load kVA?

Details?

 

[Besoeker]

Hi
I nave a chiller operating at 380v, 3 ph
any recommendation for transformer???/

thank you

One that has a 380V, three phase output and rated for the kVA you require.........

 

[Jraef]

Forget the voltage and transformer, this raises another serious red flag...

Chillers are most often centrifugal machines. 380V implies it came from overseas, which would most likely mean it was designed for 50Hz. if you are connecting it in Tujunga, CA. (per your profile) or anywhere in North America, the frequency will be 60Hz. Your centrifugal chiller will run 20% faster than it was designed for. Because of the Affinity Law of centrifugal machine power being the cube of the speed change, the power that the machine will require at the increased speed will be 173% of what it required as designed (1.2 x 1.2 x 1.2). Your motors will not be able to handle that...

 

[Toros]

Hi
I nave a chiller operating at 380v, 3 ph
any recommendation for transformer???/

thank you

Toros,
you need a transformer with American standard 3 ph voltage as primary and
380v, 3 ph., 60 hz as secondary.

 

[jumper]

Toros,
you need a transformer with American standard 3 ph voltage as primary and
380v, 3 ph., 60 hz as secondary.

Okay.....

Not 50 Hz equipment for the load.

What kVA? What primary voltage?

480 to 380 , delta- wye is available in standard sizes.

 

[Toros]

Okay.....

Not 50 Hz equipment for the load.

What kVA? What primary voltage?

480 to 380 , delta- wye is available in standard sizes.

only 240v 3 phase is available
(240v,60hz - to - 380v, 50hz all 3-phase)

I do not think you need KVA rating now, this moment

Thank you

 

[jumper]

only 240v 3 phase is available
(240v,60hz - to - 380v, 50hz all 3-phase)

I do not think you need KVA rating now, this moment

Thank you

Reread post #4.

 

[Jraef]

only 240v 3 phase is available
(240v,60hz - to - 380v, 50hz all 3-phase)

I do not think you need KVA rating now, this moment

Thank you

No can do. A transformer can only change the voltage, not the frequency.

There is no easy or cheap solution. Whatever "bargain" someone thought they got by buying a chiller from overseas is not going to be such a bargain by the time you get it to function correctly here...

 

[Tony S]

Just had a conversation along similar lines with a UK company buying US machines and wanting them to be corner earthed/grounded open delta.

Absolute heresy in IEC/UK regions unless you apply for a home office exemption to ESQCR rules. You’d have better luck platting fog before you get an exemption.

ESQCR = Electricity Safety, Quality and Continuity Regulations.

 

[Besoeker]

Forget the voltage and transformer, this raises another serious red flag...

Chillers are most often centrifugal machines. 380V implies it came from overseas, which would most likely mean it was designed for 50Hz.

Well spotted.

 

[Jraef]

Just had a conversation along similar lines with a UK company buying US machines and wanting them to be corner earthed/grounded open delta.

Absolute heresy in IEC/UK regions unless you apply for a home office exemption to ESQCR rules. You’d have better luck platting fog before you get an exemption.

ESQCR = Electricity Safety, Quality and Continuity Regulations.

As someone who deals a lot with VFDs, delta power distribution systems are a constant headache, implemented by people who either don’t understand the potential pitfalls, don’t care, or are too low on the totem pole to change a decision from on-high. As far as I’m concerned, it should be verboten.


Side note: Platting fog... never heard that but living in the SF Bay Area I love it!