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Aktiviti Penyelenggaraan Lokasi

Pemeriksaan Visual

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Ciri-Ciri Prestasi

Pemeriksaan perlu mencari:

Pengesahan bahawa salur masuk udara tidak tersumbat

Bukti kelembapan dan / atau kotoran membina-up

Bunyi yang tidak biasa bocor meterai minyak atau getaran tinggi

 !olok tahap minyak "#ika ada$ perlu diperiksa

Bukti kerosakan yang disebabkan oleh kotoran bahagianyang longgar atau asing

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Location Performance characteristics

Installed and off Ratio of the 10 minute IR to the 1 minute IR.

line (10 min IR / 1 min IR)

Determines condition of ground insulation

Test voltages similar to the IR test voltages

 Accetance criteria ratio ! "

Installed and off 

line

temerate correct and trend.

three hases

overhaul

resistance chec# condition of insulation on a $earing.

(if alica$le) Test voltage% &00 'dc

 Accetance criteria% 1 megohm

overhaul

out (TIR) cause vi$ration issues.

 Accetance criteria% 00 rm ma* .001 in

Insection and overhaul

$earing industr+ standards.

finish, itting, ru$$ing and corrosion.

overhaul Insection should loo# for%

coil movement

lugged vent holes

-aintenanceactivit+

Polariationinde* (PI)

indingresistance

 A comarison of the line to line resistances of themotors

inding. This test should $e done at the motorterminals using

a meter caa$le of measuring lo resistance

(milliohms). At+ical ohm meter does not have ade2uate accurac+.Record,

3ach hase should $e ithin 4/5 (6 5 &6) of theaverage of all

7earinginsulation

8omleted similar to other IR (megger) test. 9sed toverif+

:haft totalindicated run

-easure the trueness of the shaft e*tension. A highvalue can

; 00 rmma* .00 in

Diameters of the fits should $e measured andcomared to

measurementsof $earing

 <ournals andhousing fits 7rg <ournals and housing $ores should $e visuall+

insected for 

:tator visualInsection

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soft or degraded insulation

coil $racing ade2uate and intact

lamination damage

artial discharge activit+

tightness of edges

overhaul Insection should loo# for%

Insection crac#s in rotor $ars

$alance eights roerl+ secured

signs of $ar movement

signs of rotor/stator ru$ or lamination damage

cooling ducts clear 

ru$$ing mar#s on shaft

#e+a+ distortion

overhaul

aroriate.

overhaul and

ost overhaul

temerature correct and trend

-otor Test

voltage voltage('dc)

; 1000 &00 ! &

1000 5"&00 1000

"&015&000 "&00

! &000 &000

overhaul and

ost overhaul condition of ground insulation.

(10 min IR / 1 min IR)

Test voltages similar to the IR test voltages

 Accetance criteria ratio ! "

Rotor / :haftvisual

8lean=, $a#e dr+and

 All arts should $e cleaned and $a#ed dr+ to removeall dirt and

varnish (asneeded)

contamination. The indings should $e reinsulatedas

Insulationresistance

Perform IR chec# $eteen motor leads and ground.This

determines condition of the ground insulation.Record,

 Acceta$le

reading

! 100megohm

! 100megohm

! 100

megohm

Polariationinde* (PI)

Ratio of the 1 minute IR to the 10 minute IR.Determines

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Location Performance characteristics

Installed and off 

line

Installed and off 

line

overhaul

resistance chec#

(if alica$le)

overhaul

out (TIR)

Insection and overhaul

overhaul

-aintenanceactivit+

Polariationinde* (PI)

indingresistance

7earinginsulation

:haft totalindicated run

measurementsof $earing

 <ournals andhousing fits

:tator visualInsection

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overhaul

Insection

overhaul

overhaul and

ost overhaul

overhaul and

ost overhaul

Rotor / :haftvisual

8lean=, $a#e dr+and

varnish (asneeded)

Insulationresistance

Polariationinde* (PI)