Neil Kane Managing Director EMT UK

Transcription

1 Neil Kane Managing Director EMT UK

2 SF6 Measurement, Analysis, Diagnostics and Leak Detection

3 Our goals at EMT are to supply Maintenance Operatives with the very best tools to protect both personnel and plant and in doing so minimize the Environmental Impact to our planet.

4 SF6 Measurement, Analysis, Diagnostics and Leak Detection SF 6 - Used for over 50 years Classed as Strong Greenhouse Gas CIGRE/IEC:- Improve Diagnostic Analysis and Reduce Leakage from Equipment Improve Gas Handling Procedures Improve Re-use and recycling of SF6 DO NOT PUT SF6 INTO THE ATMOSPHERE.

5 SF6 Measurement, Analysis, Diagnostics and Leak Detection Sulfur Hexafluoride is considered to be a Fully Fluorinated Compound (FFC). Atmospheric lifetimes of up to 50,000 years, SF6 contributes greenhouse gases significantly to the environment and essentially, permanently to global warming if emissions continue to grow. Compare the global warming potential of CO 2 and SF 6 :- CO 2 global warming potential = 1 SF 6 has a global warming potential = 22,900.

6 SF6 Measurement, Analysis, Diagnostics and Leak Detection Despite the advantages of SF6-filled equipment.it s neither maintenance nor trouble-free!! Testing and Planned Preventative Maintenance will:- Improve Safety From an Operative standpoint Minimize Environmental Impact Help identify Faults & Failure Processes Save Maintenance s $ s s Improve Handling Practices Extends the lifetime of your assets

7 SF6 Measurement, Analysis, Diagnostics and Leak Detection Sources of contamination include:- Gas Handling Leakage Partial Pressure Effects (John Dalton s Law of Partial Pressure) Desorption From Surfaces Decomposition by Electrical Discharges Corona & Partial Discharges Failure & Switching Arcs Secondary Reactions of Discharge Products Mechanical Generation of Dust/Particles

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9 Why is newer GIS more reliable than older GIS? Improvements in modelling and design. Tighter manufacturing and assembly quality Most Western and Japanese OEMs are using 4th generation product no more teething problems or technical surprises also a lot more design for manufacture technology is being used.. User is more aware of GIS specific maintenance issues Introduction of Condition Monitoring and PD testing ON SITE

10 Reactivity & Toxicity of SF 6 Decomposition Products Decomposition Products Chemical Stability Stable end Products Toxicity Data (ppm) Smell Detection TWA / LD50 S2F2 Fast Decomp S. HF. SO2 0.5 / 0.8 pungent.acrid SF2 Fast Decomp S. HF. SO2 5 / pungent.acrid SF4 Fast Decomp HF. SO2 0.1 / pungent.acrid SOF2 Slow Decomp HF. SO2 0.6 / 100 rotten egg SOF4 Fast decomp SO2F2. HF 0.5 / as HF SO2F2 Stable SO2F2 5 / none SO2 Stable SO2 2 / 100 pungent/rotten eggs HF Stable HF 1.8 / acrid WF6 Fast Decomp WO3. HF 0.1 / as HF SiF4 Fast Decomp SiO2. HF 0.5 / as HF CF4 Stable CF4 Non-Toxic none Most of the decomposition products convert to HF

11 SF6 Breakdown-due to high power arcing:- SiO2 filled pacer destroyed by HF (Hydrogen Fluoride) in arced SF6 gas after a fault.

12 SF6 Measurement, Analysis, Diagnostics and Leak Detection Testing to IEC/CIGRE and ASTM Methodologies Utilizing EMT s revolutionary Infra Red SF6 Analysers Automatic SF6 Inventory Use in the Field DEFRA (UK) and EPA (USA) Leakage Management - utilizing sophisticated methods Maximizing uptime within Planned Maintenance Schedules

13 The Worlds 1 st Infra Red Portable Multi Parameter Automatic Zerowaste SF6 Analyser (Automatic Recovery)

14 Measures up to 11 breakdown products in one SF6 sample including:- SF6 Purity Dewpoint/Moisture SO2 Hi SO2 Lo HF CF4 Hi CF4 Lo Air H2S CO R12

15 ZEROWASTE Built in IEC/CIGRE methodstraffic light pass/fail. The lightest Pump Back SF6 analyser:- only 15Kg / 33lbs The fastest analyser- 5 minutes per cycle The most accurate- laboratory quality analysis in a portable analyser. Portable- 8 hours continuous field operation. Simple to use- one button operation.

16 Multi Analysis Operation: Up to 5 samples automatically. The user can select up to 5 cycles to run on the same SF6 sample. In fully automatic mode, the instrument will run the selected number of cycles then pump the gas back at the end. Unique SF6 Leak detection option.

17 Only uses 250 cc s of SF6, suitable for low voltage breakers from 11kv to supergrid Works at very low pressures:- 0.1Bar up to 10 Bar. Zero poisoning of instrument when exposed to high levels of corrosive SF6.

18 The worlds lightest SF6 analyser

19 AsserolyzIR..The worlds 1 st multi parameter SF6 high performance Infra Red SF6 gas Analyser. The lightest-1.8kg (<4lb) The fastest - 5 minutes The best- Up to 11 parameters at the same time! The easiest to use- I button operation The most accurate- outperforms any SF6 gas analyser in the world. Highest Specification - Leak detection option Less SF6 waste less than 1 litre used Interference Free IR is specific. NO PUMP BACK FACILITY

20 SF6 Filling and Topping Up Systems

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22 ASSERO SF6 Smartfill 2 formats Fully Automatic Programmable up to 15kg/hr Top up Programmable up to 50kg/hr Fill Simple walk away automation Safety Stop Mechanism Data Logging Software Improved Traceability Audible Alarm (Finish or Failure) Fully Portable Up to 5 hrs on site Car/Mains Charger IP 67 Rated Case

23 ASSERO SF6 Smartfill CTU SF6CTU- AUTO SF6 FILLING AND TOPPING UP UNIT FULLY AUTOMATIC FILL/TOP UP AUTO DATA LOG AUDITING FACILITY- Inventory analysis PORTABLE (AC OR BATTERY) LIVE TOPPING UP FACILITY GSM/GPRS OPTION ROBUST WEATHERPROOF CONSTRUCTION No need to weigh cylinder bottle US EPRI Report available

24 SF6 Leak Reduction and Management To automatically maintain pressure between defined upper and lower limits preferably just above alarm level Measure and record mass and send data remotely to SAM Enable operator to remotely start top-up Send alarms if abnormality (bottle low, pipe failure) Safety Fail safe pipe work check valve at zone end, pressure comparison either side and shut down Safety relief valve within unit

25 Automatically shuts off on target pressure Text sent to operator upon completion Data (site, equipment, operator, mass) sent to SAM web server automatically Battery or Mains Simple operation and portable (<20kg)

26 SF6 Top Up Management

27 Summary SF6 Arc Breakdown products affected by the level of impurities. SF6 leaks must be minimised-controls will only get tighter on the use and reduction of leaks. IEC/ASTM and CIGRE Recommend testing on New & In-service SF6 for maintenance and safety. All test equipment must be portable & simple to use. Gas sampling technique / materials very important. EMT products have the most complete range in the world.

28 Thank you for your kind attention