SF6 gas monitoring pressure gauges Models 1.M5 and 1.M6

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1 Rel Pressure gauges for SF₆ gas monitoring Dry of filled with dampening fluid Case diamter DS 00 (4") Type.M5: we ed parts in copper alloy Type.M6: we ed parts in stainless steel AISI 36L These instruments are manufactured to monitor the electrical opera on on herme cally sealed systems containing Sulphur Hexafluoride gas (). The indica on and the electrical opera ons are calibrated to the gas density (isochore) according to the rela on pressuretemperature. The.M5 model is suitable for indoor installa on while the.m6 model has been designed for the outdoor installa on as well. The oil filled execu ons are par cularly suitable for installa on when vibra ons are apparent. Accuracy of indication (referred to the instruments range): ±% at +0 C of ambient temperature; ±.5% within the temperature range C related to the calibration pressure of the reference isochore. Accuracy of intervention: - see accuracy of indication for set-point equal to pressure of calibration; - when set-point is different from pressure of calibration, calculate it according to the instrument range. Alarm contacts, non adjustable contacts, with antitampering sealing: - on air with magnetic block (80%Ag-0%Ni); - inductive with galvanic exit. Ambient temperature: C. Storage temperature: C Calibration pressure (): refer to order specifications. Ranges: also vacuum & compound gauges from,6 to 5 bar. lectrical connection: junction box with cable gland M0 x,5. Nominal diameter: DN00. Gas seal: leakage rate x0-6 mbar x l/s-(helium test with mass spectrometer). Case: AISI 304. Ring: bayonet lock, AISI 304 with antitampering sealing. Window: glass. Movement:stainless steel with bimetallic temperature compensator. Dial: white aluminium with black markings and coloured sectors as per customer s specification. Pointer: black anodised aluminium..m5 - : copper alloy wetted parts, suitable for indoor ambients.m6 - : AISI 36L wetted parts, suitable for outdoor ambients - Standard dry version - Standard dry version Process connection: OT58. Sensing element: phosphor bronze. Protection degree: IP 54 as per IC 59, UNI Process connection and sensing element: AISI 36L. Protection degree:ip 54 as per IC 59, UNI Silicon oil filled version 3 - Silicon oil filled version Process connection and sensing element: AISI 36L. Protection degree: IP 65 as per IC 59, UNI Window: safety glass. Process connection: OT58. Sensing element: phosphor bronze. Protection degree:ip65 as per IC 59, UNI Window: safety glass. 9 - Nitrogen filled version Process connection and sensing element: AISI 36L. Protection degree: IP 65 as per IC 59, UNI Window: safety glass.

2 A F Type A a b () c A + C surface moun ng, back flange; lower connec on. d d f h D M N L S Weight ()() (94) (46) (0) ().45/.65 lbs (0,66/0,75 kg) / M /-4 NPT (3) (77/87) (0) (0) (0) (6) (89) (5) (30) (8) (94) (46) (0) ().63/.83 lbs (0,74/0,83 kg) G / A A+C stem moun ng; lower connec on / (3) (73/83) (6) (0) (0) 3.50 (89) dimensions inches : (mm) () dimensions for single or double contacts; () add 0.88 lbs (0,4 kg), when oil filled D+ D + Q flush moun ng, front flange 4 holes; back connec on. flush moun ng, front flange 3 holes; back connec on. Weight ()() Type F b () d d e f p () D L S D+ 4M.87/ / /.6 lbs G / A (0) (73/83) (0) (0) (3) (6) (4/4) (3) (8) (0) () (0,64/0,73 kg) 43M.87/ / /.6 lbs /-4 NPT (0) (73/83) (0) (0) (3) (6) (4/4) (3) (8) (0) () (0,64/0,73 kg) D+Q dimensions inches : (mm) () dimensions for single or double contacts; () add 0.88 lbs (0,4 kg), when oiled filled

3 Magne c snap ac on contacts Set-point hysteresys:...5% f.s.v. Break ra ng: 30W/50VA (0W/0VA if filled). Maximum ra ng: 50 VAC /A (ohmic load). Minimum ra ng: 4 Vcc/0 ma (ohmic ra ng). Contact material: Silver-Nickel 80/0%. lectrical wiring: with junc on box as per VD, see table page 4 LOAD RATINGS as per DIN Volt Dry versions or filled with azote CA Inductive load CC CC Silicon dielectric oil filled versions CA Inductive load 0 00 ma 0 ma 65 ma 65 ma 90 ma 0 00 ma 40 ma 30 ma 30 ma 80 ma 85 ma ma 450 ma 00 ma 90 ma 330 ma 30 ma ma 600 ma 50 ma 50 ma 450 ma 50 ma WIRING SCHM (The numbers shown are the same as those are indicated on the junction box ) TH PRSSUR RAISING MANS ma CONTACT COD...FOR SINGL CONTACTS Opening 0S Closing 0S... FOR DOUBL CONTACTS Opening Opening Closing Closing 4 06D 09D Induc ve electric contacts lectric wiring: with junction box as per VD, see table page 4. Set-point hysteresys: 0,3...% f.s.v. WIRING SCHM (The numbers shown are the same as those are indicated on the junction box) TH PRSSUR RAISING MANS... CONTACT COD FOR SINGL CONTACTS... Opening B Closing B (-) (+) (-) (+) FOR DOUBL CONTACTS... Opening Opening 3 (-) (-) 4 (+) (+) Closing Closing 3 (-) 4 (+) (-) (+) B B 3

4 RANGS bar MPa ,6-0,...+0, ,5-0,...+0, ,...+0, ,...+0,5-0,...+0,9-0,...+,5-0,...+,4 RCOMMNDATION The measuring of the temperature necessary to the termic compensa on it is detected inside the instrument. This means that these instruments should be installed so that their opera ng temperature corresponds to the one of the monitored gas. In order to avoid any compensa ng error due to the different isochores, the calibra on must be as nearest as possible to the contacts se ng pressure. HOW TO ORDR - DSCRIPTION & COD Model.M5 -, for indoor ambients.m6 -, for outdoor ambients Version - Standard, dry 3 - Filled with silicon dielectric oil version 9 - Filled with azote oil version Mounting type A - lower connection - stem mounting D - back connection - front flange 3 holes Technical specification code To be asked to the Technical & Commercial Service Ranges : from,6 to 5 bar, also vacuum and compound Process connection 4M - /" BSP - G / A - PF / 43M - /" NPT lectric schemes : 0S...B - see tabels on page 3 Mounting accessories C - Back flange, for lower connection pressure gauge - 3 holes front flange, for back connection pressure gauge Q - 4 holes front flange, for back connection pressure gauge - CALIBRATION FATURS PF - nominal pressure of the circuit filling - calibration pressure, which identifies the reference isochore - setting pressure of the contact, on the temperature of gas of 0 C...and if the contacts are two - setting pressure of the contact, on the temperature of gas of 0 C 3 - DIAL LAYOUT : red sector range : orange sector range 3 : green sector range 4

5 US Because of its excep onal proper es, the Sulphur xafluoride is especially used as electrical insula ng in: -high- voltage switchgears;; -high-tension switching units; It can replace the dielectric oils (because of their inflammability) on: - high-voltage cables; - heavy-duty transformers; -hollow frequency for high- technology conductors. applica on. These new instruments are especially designed for every single applica on in order to measure the gas density. WHY MONIT ORING TH SF 6 GAS The essen al material proper es of SF 6 gas for such applica ons depend on the density of SF 6 gas. For example the SF 6 gas during the liquid phase, looses many of its insula ng proper es. This means that the func onal safety of the en re system is strongly dependent on the density of the SF 6 gas which is why it must be monitored. Density isochore Liquid Pressure to be compensated GAS ISOCHOR In closed gas systems the gas pressure is dependent on the gas temperature.this varia on can be represented on a diagram pressure/temperature with lines of equal density called isochores. (Fig.) Temperature varia on DNSITY MONITORS In order to work properly, the pressure gauges for gas monitoring have to detect the gas temperature as well, and use it to compensate the pressure varia ons due to the temperature varia ons. The ordinary pressure gauges with electric contacts are not able to carry out such a compensa on so they are not suitable for this DFINITION OF SSNTIAL TRMS C A L I B R A T I O N T M P R A T U R ( r e fe r e n c e ) - The calibra on temperature is the reference temperature required to find the elements required for a correct calibra on. The ambient temperature of +0 C is commonly considered as reference temperature. AMBINT TMPRATUR RANG - TA The ambient temperature range is the temperature range wthin the instruments must compensate the pressure devia ons due to gas temperature varia ons. FILLING PRSSUR -PF The filling pressure is the nominal filling pressure of the gas systems closed at the reference temperature (CT) of +0 C. This informa on is required to dimension correctly the instrument scale range. OPRATING CONDITIONS INDICATION AND OPRATION ACCURACY very single instrument is adjusted individually at its calibra on pressure in order to achieve an accurcy of +-% of the v.f.s. at +0 C. The compensa on adjustment allows to limit the error due to the SF 6 gas temperature varia on within +-5% of the v.f.s. in the temperature range of C. (Fig.). CALIBRATION PRSSUR - The calibra on pressure defines the reference isochore for temperature compensa on. The calibra on pressure must be indicated at the calibra on temperature (CT) of 0 C. CONTACTS SWIHING POINT (ST) - The switching point defines the adjusted switching pressure of the contact at gas temperature +0 C. CALIBRATION PRSSUR ISOCHOR - I PRSSUR STTING ISOCHOR- I INDICATION RROR - AVRAG OPRATING RROR- and MAXIMUM OPRATING RROR- MAX rrors due to the different isochores I and I a t 0 C and C. TMPRATUR The temperature required for compensa on is taken inside the instruments. This means that they must be installed so that their ambient temperature corresponds as accurately as possible with that of the SF 6 gas temperature. I ±,5% ± % Fig. 5

6 OPRATING CALIBRATION ISOCHOR For example if we select a much lower opera ng pressure than the calibra on pressure, we will have to add to the compensa on error to the error due to the different gradient of the opera ng isochore (Fig.4). In this way in case of extreme temperatures (i.s.-0 C) the indica on and the opera on would be inaccurate. Relevant differences between calibra on pressure and opera ng pressure mean isochores with very different gradients. Since it is possible to calibrate the compensa on in one isochore, the calibra on pressure must be as closer as possible to the opera ng pressure of the contact switching point. (Fig.3) In this way the isochore related to the opera ng pressure is included in the compensated maximum errors. I I I I I I max Fig.3 OTHR FATURS SAFTY In order to assure safety during opera on even in the most heavy condi ons (vibra ons, impacts..), all electric contacts have magne c block. In order to avoid any tampering of the electrical opera ng adjustment, all contacts are sealed. CALIBRATION Fig.4 QUALITY ASSURANC All instruments of DRUCK & TMPRATUR Leitenberger GmbH are designed and produced according to ISO 900. The SF 6 gas density monitors produced by Leitenberger are individually tested in order to assure perfect working and reliability during measurement me and opera on condi ons. In order to assure the perfect ghtness of the system on which the instrument is mounted, every instrument is checked with a helium mass spectrometer to a max escape rate of.0 mbar.l/s - 0 AVAVAILABL MODLS Beside the main models described below, Leitenberger will be pleased to develop special models on any customer s request. Model.M5 for indoor moun g (indoor) - We ed parts: copper alloy - Protec on degree IP 54 (IC 59) - Window: glass -8 Model.M6 for outdoor moun ng (outdoor) - We ed parts st.st. ISI 36L - Protec on degree P 67 (IC 59) - Window: laminated safety glass- Dielectrical siliconic oil fillingInert gas filling N) - Herme cally sealed box (escape rate.0-5mbar) This version is herme cally sealed so it is absolutely not sensible to atmospheric pressure devia ons. HNICAL SPCIFICATIONS In order to make the customer s choice much easier we created a document containing all the technical aspects, see next page. It will be of great help for choosing your Gas Density Monitor. Calibra ng these instruments means consider many other aspects such as: - Bourdon tube thermal dri, - The compensa ng bimetal features : In the erme cally sealed instruments consider also: - The interac on of the filling liquid depending on its expansion coefficient. -The interac on of the filling inert gas. 6

7 HNICAL DATA FORM SF 6 GAS DNSITY MONITORS DRUCK & TMPRATUR Leitenberger GmbH - GRMANY - quipment: Customer:... Applica on...:... Required q.ty: Note:.. MODL... -.M5 Brass internals - Indoor moun ng 3 - Oil filled - MOUNTING CAS FILLING Wheather proof IP54... CABL CONNCTION PROCSS CONN. PROCSS CONDITIONS Nitrogen gas filled... - rme cally sealed IP 67 C A Stem moun ng Bo om connec on Wall moun ng Bo om connec on Back flange CRH - (std) Right Hand M /4 BSP Male G /4 A PF /4 (std) T N Panel moun ng Back connec on Frnot flange Right Hand Stem moun ng Nine O clock connec on CBK - Back Moun ng Back Moun ng Back Moun ng 3M 4M / BSP Male G / A PF / COD PROCSS CONDITION NOT... bar MPa bar MPa... FILLING PRSSUR PF CALIBRATION PRSSUR TMPRATUR RANG TA C... CALIBRATION TMPRATUR + 0 C... ST POINTS Stem moun ng Three O clock connec on CBK - CBK - 3/8 BSP Male G 3/8 A PF 3/8 DSCRIPTION SWIHING PRSSUR - rme cally sealed IP CRH - (std) PRSSUR DIRCTION ACTION CONTACT TYP =Set point nr. =... Close Open Rising Falling Induc ve Non Induc ve =Set point nr. =... Close Open Rising Falling Induc ve Non Induc ve 3=Set point nr. 3=... Close Open Rising Falling Induc ve Non Induc ve COLORD SCTORS DIAL INFORMATION....M6 - St.St. AISI 36L internals - Outdoor moun ng FROM RD ORANG GRN TO... submit filled form to: NOT

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