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# Is this pump motor 60Hz or 50Hz?

## Is this pump motor 60Hz or 50Hz?

(OP)
So the motor rating is shown with 6 different voltages and 4 different frequencies. But then at the bottom states "50Hz: IE2-87.7 (100%)". I'm in the US so trying to wire to 460V/60Hz/3ph. Can this motor be wired for 50 Hz or 60Hz? Now, if a variable frequency drive is used, the 50Hz or 60Hz doesn't matter, correct?

Thanks,

Rob

### RE: Is this pump motor 60Hz or 50Hz?

Connect the motor in delta and apply 460 Volts, 60 Hz.
Note: 460 Volt rated motors are typically connected to 480 Volt systems.

Bill
--------------------
"Why not the best?"
Jimmy Carter

### RE: Is this pump motor 60Hz or 50Hz?

A motor name plate provides information as to what happens, or how the apparatus performs when it is powered at the data numbers stamped on the plate.

The manufacturer could confuse the end user further by listing a motor's performance capability at 25 HZ, or 400 HZ. (Hertz, Cycles Per Second ; )

Noting the original post mentions 460 volts at 60 Cycles Per Second... the only portion of the nameplate that concerns the reader is
the last specification line denoting performance of the motor at 460 Volts when the motor is connected in a Delta arrangement.

If the line voltage was only 440 volts... (Referring to the nameplate) the plate denotes the expected performance of the motor at that voltage and frequency.

I'll take a stab at the... 50 HZ IE2 87.7 (100 Percent)
And it's just a guess.

The number denotes the absolute maximum performance obtained from the apparatus at 50 Hertz.

The manufacturer could have stamped a number performance at 60 Hz, but declined because
there's only so much room on the plate ; )

John

### RE: Is this pump motor 60Hz or 50Hz?

Huh... I've often thought that because motors can be used in many different ways, more information is better. After looking at that, I'm inclined to think I might be wrong about that. I got tired of reading that novel about half way through...

" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

### RE: Is this pump motor 60Hz or 50Hz?

Or... one can prefer the Madison Avenue syndrome of... "Less is Best".

Pick your preference, and pursue it to exhaustion.

They both work.

John

### RE: Is this pump motor 60Hz or 50Hz?

Hi Subystud,

Regarding the nameplate, this one shows the ratings for a "Worldwide" standard 6 leads IEC motor that can be connected in Delta @ 380/400 V, 50 Hz or 440/460 V-60 Hz and can be connected also in Wye @ 660/690 V, 50 Hz. Just note name plate is not indicating the ratings for Y connection at 60 Hz that should be 760-800 V. The manufacturer is not providing that data because 760-800 v is not a standard voltage for 60 Hz. (US and Canada use 230-460-575 V).

Manufacturer is providing ratings a three different voltages because is taking account the possible voltage variations in the 50-60 Hz three-phase power systems granting his motor efficiency IE2 according to the standard.

In this case if the motor are going to be installed in the US @ 460 V-60 Hz you have to connect the motor in Delta. Because the rated connection is Delta you can start the motor with a Wye-Delta starter for decrease the starting current if the application allows it and avoiding power supply issues (in case the three-phase power supply can´t start the motor DOL). For setting the breaker,contactors and protection devices use the current provided for 460 V-60 Hz: 10.5 Amp.

Best Regards

Petronila

### RE: Is this pump motor 60Hz or 50Hz?

What's more important is thet the pump is going faster.....

Going faster uses more power so your 5.5 kW might not be enough.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

### RE: Is this pump motor 60Hz or 50Hz?

The nameplate shows the motor capabilities and currents at various voltages, frequencies and connections.
When coupled to a pump, the actual current may be less than nameplate at 50 Hz, or the pump may overload the motor at 60 Hz.
Also you haven't told us what type of pump the motor is driving.
Bottom line:
The motor is suitable for use on either 50Hz or 60 Hz at the appropriate voltages and with the proper connections.

Bill
--------------------
"Why not the best?"
Jimmy Carter

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