Check Engine Power Without Nameplate: Measuring Old Attic Engine's Power Capacity

Question

Hello, I found an old engine in the attic. Unfortunately, without the nameplate, and here my question appears: Is it possible to check the engine power without this nameplate?

Thank you in advance for your help.
greetings

sp3ots · Answer

Hello. Show engine.

Krzysztof Reszka · Answer

It can be roughly stated if it is not an unusual motor, and three-phase or single-phase. Please give photos of the engine.

Rezystor240 · Answer

Measure the diameter of the motor shaft.

Mixerios · Answer

Shaft diameter - 28 mm. Pictures:

Rezystor240 · Answer

@Mixerios I think the power is about 5.5kW. I can be wrong, these are just my passages.

rafcio_21 · Answer

I would bet that it has about 4 kW of similar size I have in a made compressor.

krzysiek7 · Answer

Polish SZJd engine ....... It can have a maximum of 2.8 kW, depending on its rotational speed.

Tomasz Downacki · Answer

No more than 3kW.

Krzysztof Reszka · Answer

Will we guess that? Please enter dimensions. A / B / D / E.

xdawidek05 · Answer

Hello, I have a similar problem. I have a motor that is without a nameplate:

Will anyone be able to determine the parameters of this engine (power, rotational speed)?
What dimensions do I need to provide? (according to the drawing from the previous post)

Szmajdek · Answer

Hello. I will not start a new thread because I have a similar problem. I found my grandfather krajzege in the garage and he wants to reactivate it. Referring to the scheme as above
A - 115
B-190
D-28/30
E-60

The cable is also "tired" so I will replace it but I do not know what square is there and what to replace it. 4-wire 3-phase motor.

sp3ots · Answer

Hello ! The engine shown in the photo is damaged (burnt). Do not connect it to electricity /

Szmajdek · Answer

The engine worked until I unscrewed it and opened it ...

Łukasz.K · Answer

The power can be determined on the basis of the H dimension, i.e. the shaft shear. With a high probability, it is an engine for about 1440 rpm. The rotational speed can be determined by connecting to the network whether it spins fast or slow. And the diameter of the shaft also proves its power as well as the length of the stator, i.e. generally and the motor, i.e. L.

Added after 2 [minutes]:

Due to the small size E and dimensions A and B, I would say that it is a low power engine of 2.2kW.

Added after 1 [minutes]:

As if you also gave the dimension AC and H which also testifies to power.

Added after 4 [minutes]:

If it had a lot of power, it would also have a long fragment of the shaft protruding outwards to be able to attach the spline pulley.

Szmajdek · Answer

H 11 AC 235 L 38

krzysiek7 · Answer

Such an overheating of the winding proves that the motor worked in the absence of one phase and even if it is still working, its hours are numbered, and further use in this state is not very safe. It is one of the SZJe motors, four-pole, so about 1440 rpm. If you enter the inner diameter of the core and the length of the core, I will give you exactly which motor it is.

Szmajdek · Answer

The one on the fight is 11x15.5 cm

krzysiek7 · Answer

Which length is it and whether you measured with aluminum or the core itself, and the core is important here.

Szmajdek · Answer

That was it?

krzysiek7 · Answer

Yes. It is a SZJe 34a motor, 3 kW, 1430 rpm, rated current 6.5 A at 380 V, star connection. For formalities, the core diameter is 112 mm.

Łukasz.K · Answer

Possibly it can be 3.7kW. So it is a 2.2kW or 3.7kW motor.

Szmajdek · Answer

Thank you for your help. Is it profitable to repair it or is it better to buy a new one? I revive the saw to be able to tinker with the garage.

krzysiek7 · Answer

As a rule, the SZJe series motors are very durable, the lack of a phase could have done this, otherwise they would have served for many years. As for the profitability of the repair, it is your individual decision.

Krzysztof Reszka · Answer

But his days are numbered. You can see that it was heated.

vampa · Answer

Hello,

I have a similar problem, the engine without a plate.
What might its power and turnover be? Low speed or not?

The only information I could get is the M 6 marking.

Distance between screws for fixing 150 mm
Shaft length 60 mm
Shaft diameter 15 mm

e2rd.o · Answer

These motors were produced 1-phase 180W 1400 rpm. 3-phase 400W 1400 rpm and 600W 2900 rpm.

vampa · Answer

Thank you very much for help.

Mazda6125 · Answer

Hello,

I dismantled the country frame and it left my engine. I do not know what power it has, because the plate is illegible, but it is rather strong, because my finger cut off my finger less than a year ago without a problem :D

The plate was covered with two layers of different paints, after delicately scraping individual numbers and letters can be read, but not all (especially power). In the beginning, at Uncle Google, I started looking for her by appearance - to no avail. Then I looked for photos of nameplates and looked between mine and those from the shared data network. Something has been established, but not much.

I was able to read from the plate that the engine spins up to 1420 rpm (if I read it correctly, but rather well). The model is hardly readable, but I believe that SZJd 44a is written there.

One more comment (not very helpful) - I come from Cieszyn (just like this circular saw) and there is a Celma factory in this city, which produced (I do not know if further) just such engines. Maybe it's some model of them?
Can anyone recognize the beast from these few photos and scraps of information? :)