Wika Me Sf6 Quality

8/8/2019 Wika Me Sf6 Quality

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Pressure and Temperature Measurement

SF6 Lifecycle Solutions

SF6-Quality Controlas part of a

SF6 Academy ~ Thomas Wortelmann ~ 12th May 2010

on on ase a n enanceby

Thomas Wortelmann

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SF6-filled Equipment



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Outdoor GIS



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Characteristics of SF6-filled Equipment

1. Introduced in the mid 60s

2. Continuous improvement make them still state-of-art (GIS)

3. Reduced space 1/7 of conventional air insulated substations (AIS)


4. Extended life time (approx. 30-40 years)

5. Very reliable equipment

6. ............

but

little Experience when End of Life Time is reached !

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Lifetime with respect to Faults Bathtub Diagram



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Major Fault Followed by Down-Time



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Major Fault at a GIS



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Different Type of Faults inSF6 - filled Equipment



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Statistics of GIS MajorFailures in the World


Mayor Part of Insulation/Electrical Failures in GIS due to Discharges


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Reduction of Surface Stabilitydue to By-Products*



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Important Question forMaintenance Engineers



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SF6-Decomposition Scheme



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CIGR: Maximum TolerableImpurity Levels for SF6Recycling Guide: 23.10 Task Force, Page 20



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CIGR: Maximum TolerableImpurity Levels for Re-Use of SF6Recycling Guide: 23.10 Task Force, Page 20



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CIGR: Calculation of TotalBy-Products using SO2/SOF2-ResidualsRecycling Guide: 23.10 Task Force, Appendix 2.2, Page 50



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Maximum acceptable impurity levels for Re-use of SF6 complete range of use pressures (IEC 60480)



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3 Quality Criteria concerningSF6 acc. to CIGRE and IEC



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Determination of single By-Products using (FTIR)



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Present/Past Market Situation ofSF6-Inspection Devices



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SF6-Breaker-Analyser perfectlyfulfills Substation Requirements



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Main Advantages of theSF6-Breaker-Analyser

1. One gas connection

2. Automatic flow adjustment 0.5-14 bar (mass flow)

3. Temperature compensated sensors (20C, 1bar)


. -

5. Measurement within max. 7 minutes

6. Purge function after contamination

7. Storage of 200 measurements on memory

8. Battery operated (max. 8 hours)

9. Modular System (operation with 1,2, or 3 sensors)

10. Gas consumption 0.4 Ln/min and 2.8 Ln per measurement

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Easy and leakage-freeConnection to Compartment



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Very easy-in-use / Quick results onSF6-Quality and GCB Condition



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Data Storage on Device allowsfurther Processing on PC



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Zero Emission andRe-Use using SF6-Recovery-Kit



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Positive Impacts of SF6-Breaker-Analyser


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