ML20236N787
| ML20236N787 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 06/05/1981 |
| From: | BOSTON EDISON CO. |
| To: | |
| Shared Package | |
| ML20236N770 | List: |
| References | |
| FOIA-87-644 3.M.3-6, NUDOCS 8711170009 | |
| Download: ML20236N787 (5) | |
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4 3" hiison covwu NUCLEAR' OPERATIONS DEPARTMENT FILCRIM NUC$. EAR POWER STATION Procedure No.
3.M.3-6 INSPECTION AND OVERHAUL OF 480V LOAD CENTER BREAKERS C :;
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.A k j PURPOSE The intent here is to give direction to the maintenance personnel for inspecting and/or overhauling of 480V L. C. Breakers.
1 DISCUSSION Inspection and/or, overhaul will be accomplished in accordance with G.'E.
Hanual, GEK-7303, GEK-7302, GEI-50299, GEP-4149 ' and GEF-4150.
Information such as date of inspection or overhaul, breaker operation and replacement will be entered'on the appropriate Visirec'ord Card.
component Proper isolation procedure will be followed and all electrical operation tests will be made at the breaker test station.
Following inspection and/or overhaul, and electrical operation tests, the breaker insulation level will be checked, utilizing the motorized The results of this test vill be entered on the visirecord Card.
l The breakers which will be covered Fy this procedure are as follows:
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.$o AK-15 AK-25 AK-50 gE A.52-106 A.52-103 A.52-101
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~" : 'J,..52-206 B.52-104 B.52-102 7
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C.52-303
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..52-305 E.52-204 E.52-301 403 F.52-205 F.52-401 1 2-405 G.52-302 G.52-500
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AK-15 r.m H.52-406 H.52-306 H.52-501
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V 1.52-506 I.52-308 I.52-601, J.52-605 J.52-310 J.52-602'
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l L.52-705 L.52-404 L.52-801 M.52-408
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N.52-409 I
0.52-410 s
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Q.52-304
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S.52-604 l
T.52-606 1
U.52-702 uj s
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W.52-507 s
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REFERENCES
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. TSAR' iSection 8 dEKh~"7303
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7302 1
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PRECAUTIONS S
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{I r Safety Practice o
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-%h PROCEDURE s
to commencement.
Request pernission via WRP from Nuclear W. E. prior A.
station.
Isolate via safety tags and remove the breaker to the test B.
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the stored energy springs have been discharged.
C.
Insure that Inspect'and/or overhaul the breaker in accordance with the applicable D.
G.E. Manual.
E.
Af ter reassembly of the breaker, test'to insure proper ciectrical operation, i
F.
Make insulation level tests.
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Insert data in Visirecord File.
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Release the breaker for operation to the' Watch Engineer and sign B.
all safety tags,and the Work Request Permit.
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" APPENDIX C
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. 9J, ' A. Check List No. 3.M.3-6A
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DATE:
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,0 TIME STARTED:
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TItfE FINISHED:
t STEP ACCEPTANCE CRITEalA RE'SULTS AND f
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INITIALS '
Request breaker isolation via a NOTES 1
1A W
_ RP throuch the W.E.
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_1_B Remove the breaker to the test
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I station eInsure.that i
the charging springs 2
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are discharged l
3 Remove & irisoect the Arc Chutes Inspect and take up on all 4
i rnech anica l. conn ec tions i
Inspect & clean arcing c f
. (replace where necessary)ontacts !
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Lubricate all moving parts
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7 Inspect all control wiring
> In accor, dance with G.E. Manual 8
check 6 nake ad just. where rea. I{
Thoroughly blow out
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all components of breaker e.
or vacuum 1
j Lubricate the main contacts
>./10 1 with cenducting grease Reassemble items disassembled 11 d' urine' the above steps l
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, Electrically operate the breaker 1. '
,2' from the test station to insure correct operation
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13 M....,. m ke insulation level' test uti-
. Mr l
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lizing the mojorized raencar on
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the 500V setting
, 27g3M. _ Compute the Polarization Index
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.ig)'dW@4 Consult with the Maint. readings
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Return the breaker to WontheresultsoftheInsl.Tesh
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N,Wie signing of the WRP. Release the breaker for service
, 17 M.
ACCEPT
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