Using a 60 Hz Power Supply with 50 Hz Equipment

you can use it to 5ohz, no problem, but important is check your line voltage and your equipment rates.

2,? what?

We have the supply LT voltage 960 volt 50 Hz and 6.6 kv for HT and Frequency is 50 HZ in our plant.

and 230 V 1 pahse, 50 Hz for Instruments and Electronic equipments.

Solenoid valves : 24 VDC or 220 VAC

Control Voltage : 230 VAC 1 phase 50 Hz.

We are trying get some used equipments from USA, their std is diffrent. as per their standard they are using 60 Hz corresponding voltage.

Now there is no possibility of using Motor and Transformfer.

What about the posibility of recover /reuse in our plant for these following items; Instruments, control valves, Pumps

Hello viren

You don't list your Location or Country, and I see that the UK electrical suppliers set up the original electrical generation/distribution network, as per the 50Hz and voltages you list.

It would really be better to obtain UK type 50Hz equipment, because most of the 60Hz equipment is going to be trouble for you, whether earlier or later.

Cheap suppliers of new 50Hz equipment are India and China, for used equipment any UK installed Country/location.

Your Voltages in the plant indicate your processes are not small, thus best to use the correct 50Hz equipment, even if more expensive at purchase time.

If you list your 50Hz requirements, there may well be Members who can supply at reasonable costs, whether new or used equipment is desired.

You would need to advise Location/Country, which you may do in your Profile, then it auto-updates through all Posts you make.

Reply here

Kind Regards....

Located in Indonesia, but we will go for new electrical equipments.

But my question is Instruments, control valves and pumps can salvage or not.

Hello again viren

Instruments which run on 24V DC would be quite OK - you would need to be very sure of what you need, though.

Running control valves on 50Hz, may not be fully reliable long-term, and I would personally not use 60Hz control valves on 50Hz in any plant process.

Pumps if squirrel-cage motors, and small pumps may be a useful purchase, but remember they will pump only ⁵/₆ of rated full pressure/liquids, and the kw rating needs to be also derated to ⁵/₆, because of the lower frequency/speed.

Pumps over 10kw are going to be trouble, but small volume low flow pumps 0.5kW to 5kW are generally OK.

Larger pumps best operated via variable Frequency Drives (VFD) starters, which can give the 60Hz required, if needed, and will then give full output.

You would need to obtain the equipment very cheaply, otherwise try for equipment from Malaysia ex rubber mills, Papua New Guinea ex rubber mills or mining, India, Australia via Mining Corporations, and the like, for used equipment.

If you purchase used equipment, it must be very cheap, because there is normally no Warranty.

Kind Regards....

Hello SparkY,

I am in a similar situation wherein i am getting a (not much) used machine from US with 60 cycles power requirement and also obviously different voltage.

I am looking and working on 2 options:

1. changing all squirrel cage motors with 50Hz and our standard voltage rating, so that easy for us in future for service (in case of rewinding kind of stuff) and also replacing motor. Main point is that if there is no tracking of these kind special motors there are chances of motors getting burnt.

2. providing a frequency converter + transformer combination(leads to UPS without backup). Mine is of smaller power capacity as well as voltage rating.

what is your kind suggestion? This could be a solution to viren also.

Thanks in advance

with Best Regards,

kayems, india

Rewinding motors is extremely labor-intensive. Winding, forming, and installing coils for the new field (and for the armature, if that is also wound) will usually cost you more than a new motor.

Rewinding makes sense only if it will cost less than buying and installing a new replacement.

Hi in your case it is very danger to use a 60 Hz power supply with 50 Hz because the frequency is different, so you have one way transformer to change the power from 60 Hz to 50 Hz this transformer made by japan

Any centrifugal pump will almost certainly supply much less than 5/6 the rated output. Replace motor and pump if the volume is important or use a VSD.

Instrumentation & controls:- Watch out for overheating of transformers and inductors (electrovalve coils for example). These can usually be replaced cheaply with corectly rated units. Instrumentation working from lower voltages (5, 12, 24) may just need their local power supplies replacing.

Are the original equipment manufacturer's instructions not to hand, then? Is their telephone number not on it?