Transcript 10th International Conference on Live Mintenance

HRVATSKA ELEKTROPRIVREDA-TRAINING AND
EDUCATIONAL CENTER’S ACCREDITATED HIGHVOLTAGE TESTING LABORATORY EXPERIENCES
Vladimir Caha, HEP – Training and educational center Velika
Darko Vidović, HEP – Distribution System Operator
1. WHAT IS ACCREDITATION ?
It is a process conducted by national
accreditation body where certain institution (e.g.
laboratory) is evaluated in its professional and
technical capability according to internationally
recognized rules.
2. WHAT IS THE MAIN PURPOSE OF
ACCREDITATION AGENCY ?
HAA is formed in order to conduct technical laws in
Republic of Croatia which will:
support quality systems,
reduce business risks
increase competitiveness
international market
on
national
and
3. WHAT HAA INSURES ?
Quality
of
testing,
measurement,
calibration,
certificiation and inspection in Republic of Croatia.
Acceptance of test reports and conformity certificates in
foreign countries
Technical support for industry in the field of
competitiveness
Confidence in safety and quality of product and
services
Technical support for national bodies responsible for
safety and health, environment protection, costumer
protection and other public interests.
4. INTERNATIONAL ASPECTS ?
HAA represents Republic of Croatia in European and
international accreditation organizations.
HAA is a full member of EA (European co-operation for
Accreditation ) since November 17th 2005.
HAA is associated member of ILAC (International
Laboratory Accreditation Cooperation) since 2001.
HAA follows the work of IAF (International Accreditation
Forum).
5. WHAT ARE THE BENEFITS?
Reliable testing and measurements reduce production
costs, products flaws, increase innovation processes,
help in deciding and risk assessment.
Accredited laboratory is continuously monitored and
periodically audited. If some costumer applies
complaint on laboratory HAA conducts special check.
Since audit was performed by independent
accreditation body customers are sure in competence,
accreditation is saving time, money and reduces
business risk.
6. UPON WHAT STANDARDS
ACCREDITATIONS ARE PERFORMED ?
Testing and calibration laboratories HRN EN ISO/IEC
17025
Certification organizations for products HRN EN 45011
Certification organizations for quality control systems and
environment control systems HRN EN ISO/IEC 17021
Certification organizations for personnel HRN EN ISO/IEC
17024
Control/inspection organizations HRN EN ISO/IEC 17020
Medical laboratories HRN EN ISO 15189
7. HEP NOC HV LABORATORY
REASONS?
Required tests according to valid standards for live work
tools and protective equipment.
Training center has its own stock of live work tools and
equipment that needs periodical testing.
HEP uses large quantities of live work tools.
8. HOW MANY PERSONNEL?
3 employees are enough: 1 laboratory manager, 1 quality
manager and 1 technical manager.
All employees are qualified for testing procedures.
With head manager they form quality insurance team.
9. EQUIPMENT?
The modern Haefely test transformer 100 kV with capacitive
divider, continuous regulation…
Hand-made test frame according to standards EN 60855,
EN 60832, EN 62135 and EN 62193
10. PERIODICAL TEST IN 4 STANDARDS?
11. OTHER REQUIRED STANDARDS AND
COVERED SPECIMENS?
IEC 60060-1 and 60060-2 for high voltage tests conditions,
EN 60243-1 for determination of dielectric strength of
insulating materials and other related standards
hot sticks – all types
12. CONTENT OF TEST REPORT?
according to accreditation rules includes all necessary
report elements such as conditions, part of applied
standard, nominal and test voltage…
Finally, it gives assessment “PASSED” or “NOT
SATISFIING”. Level of confidence in test result is greater
than 97 %.
13. RESULTS?
Each negative test result is recorded in document with
observation and archived for further analyses.
In 6 years over 4000 pieces of tool and equipment has been
tested.
Average result is approx.: 86% in satisfactory condition, 14
% damaged, completely broken or doubtful according to
visual inspection criteria (all types of insulating tools and
equipment included-the most negative are ins. gloves and
barriers).
Flashovers are rare on FRP hot-sticks, happening on older
tools with long scratch marks, average 0,2 %.
Noticeable rise of temperature on some hot-stick.
FLASHOVER AND FLASH THROUGH
14. FUTURE DEVELOPMENT?
constant improvement of test conditions and personnel
through professional education
HRN EN ISO/IEC 17025:2007 requirements
applied in HEP-NOC
To introduce and improve general quality policy of service
with achievable policies and goals
To establish quality system organization
To maintain and improve quality system control
To develop procedures that cover: relations with customers
including main and additional services, managing their
complaints and comments
To describe the manner of acquiring materials and services
necessary for proper laboratory function
HRN EN ISO/IEC 17025:2007 requirements
applied in HEP-NOC
To have manner of dealing with non-conformities
To objectively audit quality management control system
To constantly enhance competences of laboratory
personnel and have a manner of education of new
employees
To develop and maintain environmental conditions in
laboratory
HRN EN ISO/IEC 17025:2007 requirements
applied in HEP-NOC
To properly use, service and calibrate test and measuring
equipment
To apply validated test methods and take concern of
measurement uncertainty
To be able in proving measurement traceability
To handle test specimen with needed care
To control test results
To issue valid test reports with accompanying diaries, notes
and opinions
Trainees schedule
Introduction to live work technology – regulations
New requirements – work performance conditions
New tools and equipment, common and individual
Individual training approach
Setting roles for each exercise
Practical knowledge and comparison to non-live work
Responsibilities
Visiting training center’s HV testing
laboratory
Presentation of laboratory’s staff and equipment
Introduction to laboratory rules for behavior and its general
role
Explanation of testing conducted and types of insulating
equipment that should come for periodical check
Giving the samples of tool’s cross-sections
Explanation of the most common observations
Insight on some parts of testing procedures
Visiting training center’s HV testing
laboratory
Importance of visual inspection – what to look for
Presentation of hot-stick test frame
Presentation of rubber glove testing method with
explanation of measured results
Presentation of insulating barrier test set
Procedure with specimens that did not pass some of testing
criteria
Meaning of standards applied for live work tools according
to HRN EN 60900:2008
Insulated tools according to HRN EN
60900:2007
Dielectric test of insulating gloves
Other demonstrations and reminders
Voltage detector threshold voltage set
Jump of the arc to an object on floating potential
Hot-stick test on test frame 100 kV/30 cm
How to read markings and labels
How to properly clean hot-stick
Grounding wire
Stress for insulating barriers and weak points
Clean working clothes and bad „ozone”
Trainees can participate in hot stick testing
CONCLUSION
To fulfill mentioned requirements it is obligatory to write
Quality Manual as a top document, describing the manner
of creating all other documents such as procedures, work
instructions, forms and raw notes.
Whole system must be continuously monitored by objective
internal auditor(s) and periodically audited once per year by
accreditation agency.
Accreditation according to HRN EN ISO/IEC 17025:2007 is
valuable upgrade and fully compatible with simpler systems
like IS0 9000 series.
CONCLUSION
HV laboratory demonstrations represent valuable addition
to live work training process.
Trainees truly appreciate opportunity to see the physical
meaning of some conditions learned, as well as all practical
usage aspects and recommendations given with explains.
Presented tests of live work tools and equipment cause
appreciation of safety level given by live work equipment.
Trainees learn part of standard procedures when facing
described situations in practice.
Thank you!