Bucket wheel reel irrigation result

[fredo24]

yes i just redid the calculations
I get 17µ I want to go up 20µ
the low rotation of the motor (920tm has a direct influence on the calculation
recall
4.5kva three-phase asynchronous motor
in 220vlt cos 0.84 920t mn
self excited by capacitor
mounted on bucket wheel (hydraulic)
3 phase outgoing 1200w
without electric heating regulator
fredo 24

[fredo24]

Calculation of Capacitor value for
Transform an Asynchronous Motor into an Asynchronous Generator


Known Elements

Motor Costs 0,84 0,84
Synchronization speed 950 950 need to know what it is!
Rotation speed 920 920
Nominal voltage 220 220
Power in Watts 4500 4500
amperage in 220v 5,2 5,2


Calculated items

Rotation speed in generator 980
Value of the Conserver
#REF star coupling!
Value of the Conserver
Triangle coupling 23,62455905 nominal voltage 220 V


Calculation formulas

known elements
Hypothenus 550 hypotheses squared 302500
cos 0,84


elements determined 1
adjacent side 462 adjacent side to square 213444

items determined 2
opposite side 298,4225193 opposite side to square 89056

specific item 3
sinus 0,542586399
I found this spreadsheet that gives me the value of condos
I must also install 3 relays so that the condos do not overload
would you have a relay idea that I should ask
with shema
triangle condo
fredo 24

[Forhorse]

Why do you want to put a relay for the capacitors?

[fredo24]

I read on several articles that the condos once he had
self excited generator should be cut off
overheating and possibility of explosion of condos
true or false,?
FREDO24

[Forhorse]

If you remove the condos you will no longer provide reactive energy to the gene and the tension will collapse, the gene will defuse.

This is also the problem to feed a load other than purely resistive with this kind of gene, it is constantly necessary to correct the cos-phi by adding or removing condos, it is not within the reach of an amateur ...

So the condos must be left connected and permanent engine condos must be used.
It is sure that if you use starter condos you will have concerns like this.

[fredo24]

http://www.abm-outillages.com/Boutique/ ... rcosse.jpg
I found this one what do you think
fredo 24

[Gaston]

I found this one what do you think

It's a pretty gray cylinder ...

Ah yes, it also seems to have 4 connections

[Forhorse]

There's nothing to think about it ... it's the generic photo of a mains capacitor.

[dedeleco]

To put in the humor section the photo !!

missing the plate above the characteristics, number of microFarads, intensity, voltage, clearly visible connections, dimensions (photo diameter with a ruler in cm next to it, etc.).
Ultimately, we measure with a capacimeter to check if it is not dead !!

[fredo24]

excuse me the datasheet did not follow the post

25 µ Farrat with pods In stock available
description:
Ref: Permanent-condenser-mkp25co
25 µF with terminals 40x93 type MKP 25 capacitor for electric motors

Plastic housing, fixing screw with nut.

Features:
Capacity (mf): 25
Dimensions DxL: 30 x 56 mm
Voltage: 400 +/- 10% V
Frequency: 50-60Hz
Sales unit: Piece

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