REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Proje
Maintenance of Vacuum Circuit Breaker
VA6312/12-2
Proje
detail
Series No :561180-01
12KV, 1250 A, 25 KA
Manufactured date : 1995
This circuit breaker is being used in underground
facility and under heavy conditions both of place
and ambient condition.
Inspection Informed that Vacuum leakage
details
/ contact resistance exist in
Vacuum Circuit breaker as
result of site test.
End User
CBİ- Turkey
Supplier
AEG ETİ
Inspection location
Reported
Atadeniz Demirer
Electrical Engineer
REZONANS ENERJİ
Rezonans enerji workshop
Gebze / KOCAELİ
Inspection type
Spot inspection
Scope of work
Inspect
Investigation
and evaluation
of test results
on failed Circuit
breaker
Equipment/ Goods
Requested for
inspection
Deviations /
maintenance during
inspection
X
Project inspection
requested
maintenance
repair
X
Performed
x
comments
x
Investigation at Rezonans enerji facility (gebze/ kocaeli) for Vacuum circuit
breaker from Çayeli Bakır İşletmeleri which not passed the contact
resistance test at the site during maintenace works performed by
İNVOLMENT FİRM.
See explanation mentioned in this report
1
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Aplicable norms, standards
and specifications :
IEC 62271-1 2011
IEC 62271-100 2008
Referenced documents
Attached to
request
x
At place of
inspection
Document used
Repairment request from ÇBI
10.10.2014
Inspection Date
Inspection result
•
•
•
Satisfactory
Non conforming
Rejected
Pending
x
Detemined contact contamination ( Oxidation ; dirt including heavy substances due to
ambient condition)
Contact resistance value after cleaning connections are satisfactory.
Vacuum leakage is not found.
See below fishbone analysis.
a)- Report Details
a.1)-Attendees
-
Mr. Atadeniz Demirer, Rezonans Enerji- Electrical engineer
Mr. İlhami Yaman, Rezonans Enerji- Electrical supervisor
Mr.Mizrap Atalay, Rezonans enerji- Electrical supervisor
Mr. Nedim Acar, Rezonans enerji- Master technician on vacuum circuit breaker
manufacturing.
2
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Switching Device
Contacts contamination
Need to be lubricate on mec.parts
VCB ,12kV
Problems
Unsufficent time for
evaluation of test
Contact resistance tests
result
Vacuum leakge test
People
Test
a.2) Measuring equipment used
-
Vacuum tester, Megger
Contact resistance measurement device, ISA, AB elektrik
a.3)- Document used
ALSTOM maintenance standards
a.4) Equipment.
VA 6312- Vacuum circuit breaker
a.5) Inspection activities and result
3
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Rezonans enerji found that vacuum circuit breaker is not faulty. Interrupter poles are no
any vacuum leakages. There is some problems surface of contacts and mechanism
contamination.
Rezonans enerji will recommend to maintenance the contacts and mechanism parts with
silver coating and detailed cleaning each connection parts.
Contacts part of circuit breaker after dismantalled from vacuum circuit breaker
VA6325
Critical
contamination of
contacts for fault.
4
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
-
Contac resistances are within 17,5 micro Ohm and 43 Micrp ohm after cleaning and
reducing from dirty.
-
Vacuum leakge is not excit in interrupters.
5
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Contacts becoming oxidetion
Contamination of mechanism and its
parts
6
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Contacts and connection parts made
of copper must be silver coated.
Mechanism parts must be cleaned
and lubrication their special oil.
7
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Finger Contacts of Vacuum Circuit Breaker.This show us that dangeour situation for
fault to be occurred is exist on the Circuit breaker.
Result :
Vacuum circuit breaker could be put into service if the necessary maintenance
would have been carried out on it.
Work to be done :
-
The surface of all copper bar must be cleaned.
The surface of All connection bars must be coating with silver.
All mechanism parts must be cleaned.
Driver mechanism must be lubrication with appropriate oil recommened by
manufacturer.
8
REZONANS ENERJİ
Sultan Orhan Mah. Hasköy San.Sit.No.16/14
41410 Gebze- Kocaeli/ Türkiye
Tel: + 90 (0) 262 643 79 93
Fax: +90(0) 262 643 94 47
www.rezonansenerji.com
INVESTIGATION REPORT
Report : 20141010-1-4
Recommendation : Site maintenance in term of schedule is not suitable for circuit
breaker which are very important electrical equipment for system running.
Surface of contacts and mechanism part must be investigated in term of
contamination and oxidetion.
Each part must be disattached and cleaned as indivually. Over 15 year all of circuit
breakers must be overhoul maintenance.
Atadeniz Demirer
Electrical Engineer
General Manager
Rezonans Enerji
9
Download

INVESTIGATION REPORT Report : 20141010-1-4