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middleman210 · 10-24-2013, 07:04 PM

Quote:

Originally Posted by bruceisla

I was in Lowes to pick up some Pex plumbing parts so I rolled out a few 10 (ish) cf reefers and looked at the stickers on the compressors. Energy Star are spec'd at 6 amps locked rotor. Non Energy Star are as high as 11 amps locked rotor.

Lock rotor is not the reading you want to go off of. Normally when a motor or compressor is in lock rotor ( unit seized up) the next thing you smell is the wiring melting. What you need to read is total amp draw or it is sometimes called full load amps or fla

az bound · 10-24-2013, 07:22 PM

Quote:

Originally Posted by middleman210

Lock rotor is not the reading you want to go off of. Normally when a motor or compressor is in lock rotor ( unit seized up) the next thing you smell is the wiring melting. What you need to read is total amp draw or it is sometimes called full load amps or fla

You are mistaken. LRA (locked rotor amps) is listed on most compressor motors. It is the manufacturers rating of the amps needed to start the compressor and bring it up to normal speed.
FLA (full load amps) is the rating at full operating speed.

middleman210 · 10-24-2013, 07:41 PM

Quote:

Originally Posted by az bound

You are mistaken. LRA (locked rotor amps) is listed on most compressor motors. It is the manufacturers rating of the amps needed to start the compressor and bring it up to normal speed. FLA (full load amps) is the rating at full operating speed.

What I should have said is for sizing lra is not what you want to go off of as this load is only for a split second. Unless so thin is wrong with the unit.

az bound · 10-24-2013, 07:57 PM

Quote:

Originally Posted by middleman210

What I should have said is for sizing lra is not what you want to go off of as this load is only for a split second. Unless so thin is wrong with the unit.

It is best to use both when trying to establish the power usage, which this thread is about. Every bit of information gathered adds to the acuracy of an estimate, otherwise it is not even an educated guess.

bruceisla · 10-25-2013, 04:51 AM

Quote:

Originally Posted by middleman210

What I should have said is for sizing lra is not what you want to go off of as this load is only for a split second. Unless so thin is wrong with the unit.

A loss of power and then rapid restoration of power can (will) cause a locked rotor due to high head pressure. The compressor is not seized ... it just hasn't equalized. It's not that unusual and can last for awhile. It is important for sizing a dedicated inverter since the locked rotor current draw is not as brief as you might think.

bruceisla · 10-25-2013, 04:52 AM

Quote:

Originally Posted by az bound

You are mistaken. LRA (locked rotor amps) is listed on most compressor motors. It is the manufacturers rating of the amps needed to start the compressor and bring it up to normal speed.
FLA (full load amps) is the rating at full operating speed.

X2 ...

Dr4Film · 12-02-2013, 05:17 PM

Yesterday, I reset the Kill-O-Watt that is mounted on the Samsung for the month of December.

The latest readings were for all of November and part of October, a total of 864 hours of running time with 66 KwH used during that time frame.

That works out to about 1.83 KW per day.

FWIW.

Dr4Film ----- Richard

bruceisla · 12-02-2013, 05:56 PM

Quote:

Originally Posted by Dr4Film

Yesterday, I reset the Kill-O-Watt that is mounted on the Samsung for the month of December.

The latest readings were for all of November and part of October, a total of 864 hours of running time with 66 KwH used during that time frame.

That works out to about 1.83 KW per day.

FWIW.

Dr4Film ----- Richard

Thanks Richard ... impressive ... at my local rate, that's about $.17/day.