EXPLOSION PROTECTION

Transcription

1 EXPLOSION PROTECTION CERTIFICATE OF CONFORMITY Cert NO.GYJ X This is to certify that the product Resistance Thermometer manufactured by WIKA Alexander Wiegand SE & Co.KG (Address:Aiexander-Wiegand-Straße 30, Klingenberg, Germany) which model is Ex marking TR series See attachment product standerd I drawing number has been inspected and certified by NEPSI, and that it conforms to GB ,GB ,GB This Approval shall remein in force until Remarks l.conditions for safe use are specified in the attachment to this certificate. 2.Symbol "X" placed after the certification number denotes specific conditions of use, which are specified in the attachment to this certificate. 3.Model designation is specified in the attachment to this certificate. 4.1ntrinsic safety parameters specified in the attachment to this certificate. S.This certificate is also applicable for the product with the sametype manufactured by WIKA Instrumentation (Suzhou) Co., Ltd. (Address: No.81, Ta Yuan Road SND Suzhou, PR China ) Director National Supe Explosion Prote lssued Date This Certificate is valid for products compatible with the document "...Ai'Ä..."., entre for '---trumentation 103 Cao Bao Road Shanghai200233, Chlna http-./ / info@nepsi.org.cn Tel: Fax: EdHionOS

2 1 00%~1X~1X*~-*~J!{l~fft%:M National Supervision and lnspection Centre for Explosion Protection and Safety of Instrumentation (GY J X/GY J X) (Attachment I ) Attachment I to GYJ X/GYJ X TC/TR series Thermocouple/Resistance Thermometer, manufactured by WIKA Alexander Wiegand SE & Co.KG or WIKA Instrumentation (Suzhou) Co., Ltd., has been certified by National Supervision and lnspection Center for Explosion Protection and Safety of Instrumentation (NE PSI). The Miniature Resistance Thermometers accords with following standards: GB Explosive atmospheres-part 1: Equipment- General requirements GB Explosive atmospheres-part 4: Equipment protection by intrinsic safety "i" GB Explosive atmospheres-part 20: Equipment with equipment protection Ievei (EPL) Ga Thermocouple/Resistance Thermometer has the Ex marking Ex ia II C T1-T6 Ga or Ex ia II C T1-T6 Gb or Ex ia II C T1-T6 Ga/Gb or Ex ib li C T1-T6 Gb. The certificate numbers are GY J X(TC series), GY J X(TR series). The certifed type codes of TC series are as following: TC10-A, TC10-B, TC10-C, TC10-D, TC10-E, TC10-F, TC10-H, TC10-K, TC12-A, TC12-B, TC12-M, TC40, TC50, TC53, TC55, TC59, TCB0-0, TC80-P, TC80-Q, TC80-R, TC80-S, TC80-T, TC80-U, TC81, TC90, TC93, TC95. The certifed type codes of TR series are as following: TR10-A, TR10-B, TR10-C, TR10-0, TR10-E, TR10-F, TR10-H, TR10-J, TR10-K, TR1 2-A, TR12-B, TR1 2-M, TR40, TR50, TR53, TR55, TR6C-A, TR Special conditions for safe use The suffix "X" placed after the certificate number indicates that this product is subject to special conditions for safe use: Types with <D::;;3mm or "grounded measuring points" do not comply to clause of GB because of the kind of use. By that from a safety-related view this intrinsically safe circuits shall be considered as galvanically connected to ground potential. Potential equalization shall exist in the complete course of the erection of the intrinsically safe circuits. Furthermore for the connection the requirements of clause in GB shall be considered. Page 1 of 5

3 (GY J X/GY J X) (Attachment I ), For devices that do not comply with the electrostatic requirements of and due to their construction, electrostatic discharge shall be shall be avoided. The used transmitters/digital displays shall be provided with their own certificates in accordance to series standards. The installation conditions, the electrical connection values, the temperature class and the permissible ambient temperature shall be taken from the corresponding Ex certificate and shall be considered. A reverse heat flow from the process exceeding the permissible ambient temperature of the transmitter, the digital display or the enclosure is not allowed and shall be avoided by a suitable thermal insulation or a suitable neck length of the tubing. ln case of wall thickness less than 1 mm the device may not be exposed to environmental conditions which may negatively affect the partition wall. A thermoweil with a suitable minimum wall thickness can be used altematively. Using a thermoweil/neck tube the device shall be constructed in a way that allows an installation that results in a sufficient tight joint (IP66/IP67) or a flameproof joint ( ) in the direction of the less endangered area. The circuits of the coaxial multipoint thermocouples shall be considered as connected due to their construction. For the application a separate examination shall be done resp. for the connection of the coaxial multipoint thermocouple special condition for safe use must be considered if applicable. An additionally assessment as an intrinsically safe system shall be done. (e.g. connection of several circuits of different transmitters etc.) For the use of enclosures they shall either be provided with their own Ex certificate or they shall comply to the minimum IP requirement. At least IP20 applies for all enclosures. Light meta! enclosures, however, shall comply with clause of Non-metallic enclosures or powder-coated enclosures shall also comply with clause of or have a corresponding waming marking. Accessible parts of metallic enclosures which are not connected to ground and accessible parts of metallic enclosures which are connected to ground but do not comply with clause 6.5 of , shall comply with clause 7.5 of IEC : 2011 or have a corresponding waming marking. 2. Conditions for safe use 2.1 The relationship between Ex marking, temperature class, ambient temperature range and maximum surface temperature {T max) at the tip of the probe or thermoweil are as following: Page 2 of 5

4 (GY J X/GY J X) (Attachment I ) Temperature Ambient temperature range Maximum surface temperature {T max) Ex marking class (Ta)Note1 at the tip of the probe or thermoweil Ex ia li C T6 Ga Ex ia li C T6 Gb -40 ( -+80 ( T6 Ex ia II C T6 Ga/Gb -50 (-+80 ( Ex ib II C T6 Gb Ex ia II C T5 Ga T M(medium temperature) + self- Ex ia II C T5 Gb -40 (-+80 ( heating T5 Ex ia II C T5 Ga/Gb ~ J 1 6.~ -50 (-+95 ( Special conditions for safe use listed Ex ib II C T5 Gb above shall be considered.-~ Ex iaii C T1-T4 Ga.d--1 ' Ex ia II C T1-T 4 Gb -40 (-+80 ( T1-T4 Ex ia II C T1-T4 Ga/Gb -50 ( ( I \~. Ex ib II C T1-T4 Gb Note1: Temperature range -40 oc to +80 oc for standard models. Extended temperature ranges are possible for special models. These models are manufactured with special components, i.e. suitable casting compound, enclosures and cable glands for extended temperature ranges. For applications that require devices of EPL Gb, devices of EPL Ga may also be used. The same electrical parameters as EPL Ga must be applied. lf a device of EPL Ga is used in an application requiring EPL Gb it may not be re-used in an application requiring EPL Ga. For applications that require devices of EPL Ge, devices of EPL Ga or Gb may also be used. The same electrical parameters as EPL Ga or Gb must be applied. lf a device of EPL Ga or Gb is used in an application requiring EPL Ge it may not be re-used in an application requiring EPL Ga or Gb. For the installation of a transmitter and/or a digital display the special conditions for safe use shall be considered. 2.2 The input intrinsic safety parameters of the Thermocouple/Resistance Thermometerare as following : Ui=30V 1i=550mA Pi=1.5WNote2 Ci=OnFNote3 Li=OmHNote3 Note2: The permissible power for the sensor depends on the medium temperature TM, the temperature class and the thermal resistance Rth, but not more than 1.5 W. Note3: The values for cable probes shall be taken from the type Iabei and shall be considered for the connection to an intrinsically safepower supply. 2.3 The output intrinsic safety parameters of the Thermocouple/Resistance Thermometer to the sensor circuit are as following: Uo=30V lo=550ma Po=1.5W... Page 3 of 5

5 (GY J X/GY J X) (Attachment I ) 2.4 For the use of multiple sensors and simultaneous operation the summation of all single power dissipation may not exceed the maximum permissible power dissipation. The maximum permissible power shall be limited to 1.5 W by the end-user in the end-use application. 2.5 When built-in transmitter or digital display is used, the output intrinsic safety parameters shall be the same as specified in clause 2.3. The input intrinsic safety parameters shall be taken from the corresponding Ex certificate issued by certificate body according to GB3836 series standards. 2.6 For the isolated single element the above specified values are valid. For elements which are considered as grounded due to their construction the specified values apply for the sensors in sum. 2.7 The circuits of the coaxial elementshall be considered as connected due to their construction. For the application a separate examination shall be done resp. for the connection of the coaxial multi-point thermocouple special conditions for safe use shall be considered if applicable. An additionally assessment as an intrinsically safesystemshall be done (e.g. connection of several circuits of different transmitters etc.). 2.8 The thermal resistance are as following: (Rth in KIW) Diameter of the 2.0mm- 3.0mm- 6.0mm- 3.0mm- 0.5mm- 1.5mm- 3.0mm- 6.0mmsensor <3.0mm <6.0mm 8mm 6.0mmNote4 <1.5mm <3.0mm <6.0mm 12.0mm Sensor RTD RTD RTD RTD TC TC TC TC Without thermoweil With thermoweil - Fabricated (straigth and tapered) I I I 11 I 2.5 ~tl I... (e.g. TW22, TW35, 1 ~- TW40, TW45 etc..) :.:*- T~ I With thermoweil - \1 (:...,_ 1 ~1 :\> bar stock 1.1 ~:: I I I~ (straight and tapered) Ir I (e. g. TW10, TW15, I 4 1 TW20, TW25, TW30, I ~ I i~ TW50, TW55, TW60 n etc.) Special designed thermoweil - EN I I 33 I I..J' 1~ 1 I Tx55(supporttube) I :er I 20 5 Fitted in a blind hole (minimum wall thickness 5 mm) Note4: Surface sensitivity 2.9 Forbid end user to change the configuration to ensure the equipment's explosion protection performance. Page 4 of 5

6 (GY J X/GY J X) (Attachment I ) When installation, use and maintenance of Thermocouple/Resistance Thermometer, observe following standards GB "Explosive atmospheres- Part 13: Equipment repair, overhaul and reclamation" GB "Eiectrical apparatus for explosive gas atmospheres Part 15: Electrical installations in hazardous area (other than mines)" GB "Eiectrical apparatus for explosive gas atmospheres Part 16: lnspection and maintenance of electrical installation (other than mines)" GB "Explosive atmospheres- Part 18: lntrinsically safe system" GB "Code for construction and acceptance of electric device for explosion atmospheres and fire hazard electrical equipment installation engineering" 3. Manufacturer's Resposibility 3.1 Special condition for safe use specified above should be included in the instruction manual. 3.2 Manufacturing should be done according to the documentation approved by NE PSI. Page 5 of 5