iec extl: tÜv sÜd product service gmbhiecex.iec.ch/iecex/iecexweb.nsf/0... · testing and...

Dateiname: DE/TPS/ExTR11.0001/00 Berichtsnummer: 71382448 Revision: 1 Seite 1 von 21

Ersteller: Frank Pscheidt-Denzler Erstelldatum: 14.02.2012

Telefon: + 49 711 7005-205 Telefax: + 49 89 5155-1691 Mobil: +49 1607044097 E-Mail: [email protected]

TÜV SÜD Product Service GmbH Niederlassung München Ridlerstraße 65 80339 München Deutschland

IEC: International Electrotechnical Commission IECEx Scheme: IEC Scheme for Certification to Standards relating to Equipment for Explosive Atmospheres

IECEx TR Ref. No. DE/TPS/EXTR12.0001/00

IECEx ASSESSMENT AND TEST REPORT FOR EXPLOSIVE ATMO SPHERES EQUIPMENT PROTECTION BY INTRINSIC SAFETY “i” IEC 60079 Part 0 and Part 11

Product (including Model/type Ref.)

SIFLOW FC070EX

Ex code [Ex ia] IIC

Name and address of the applicant

Siemens AG Würzburger Straße 121 90766 Fürth

Name and address of the manufacturer

Siemens AG Würzburger Straße 121 90766 Fürth

Additional Information (if necessary)

PUBLICATION EDITION Documentation and representative sample of the product were assessed and tested (as necessary) and found to be in conformity with

IEC 60079-0:2004 IEC 60079-11:2006

4 5

Internal Test Report Ref. No. of the IECEx CB or TL (if necessary)

71382448

Internal File Ref. No. of the IECEx CB or TL DE/TPS/ExTR11.0001/01

Degree of Ingress Protection, and specific particulars of installation, use

IP20

Date of Issue 07.03.2012

This IEC ExTR is issued by the following:

IEC ExTL: TÜV SÜD Product Service GmbH Gottlieb-Daimler-Straße 7 70794 Filderstadt

IECEx CB: TÜV SÜD Product Service GmbH Ridlerstr. 65, 80339 Munich

Signature


Ersteller: Frank PscheidtErstelldatum: 14.02.2012

This is a consolidated report, comprising all the r equirements of IECEx for the Cover Sheet and Ex Test Reports for ExplosiveIntrinsic Safety “i”

- This report is to be compiled and verified by the ExTL, with the ExCB giving the final approval. ExTR Addendums and ExTR Report of National Differences may also supplement this

- This report shall only be used for a compliance verdict. If the assessment or test was not in compliance with the Standards, this report shall not be issued in its present format with IECEx TR number.

- The test results presented in this report relate assessment results relate only to the documents listed in the documents list of this report.

- Throughout this report, a point is used as the decimal separator.

- The report number, page number and total number of this report.

- This report shall not be reproduced except in full, unless written authority of the ExTL and ExCB is obtained.

Copy of marking plate:

This report was written by:

Name: Frank Pscheidt

Position: Testing

This report was verified by:

Name: Ulrich Jacobs

Position: Technical Certifier

Copyright © 2007 International ElectrotechnicalStandards Relating to Equipment for use in Explosiv e Atmospheres (IECEx), Geneva, Switzerland. All rights reserved.

The version number of this report template is ExTR6 0079

Frank Pscheidt-Denzler Erstelldatum: 14.02.2012


TÜV SÜD Product ServicNiederlassung MünchenRidlerstraße 6580339 MünchenDeutschland

IECEx TPS 08.000XX

This is a consolidated report, comprising all the r equirements of IECEx for the Cover Sheet and Ex Test Reports for Explosive Atmospheres Part 0: General Requirements and Part 1 1:

This report is to be compiled and verified by the ExTL, with the ExCB giving the final approval. ExTR Addendums and ExTR Report of National Differences may also supplement this

This report shall only be used for a compliance verdict. If the assessment or test was not in compliance with the Standards, this report shall not be issued in its present format with IECEx

The test results presented in this report relate only to the specific object tested, and the assessment results relate only to the documents listed in the documents list of this report.

Throughout this report, a point is used as the decimal separator.

The report number, page number and total number of pages must be included on all pages of

This report shall not be reproduced except in full, unless written authority of the ExTL and

For use of Ex TL:

Name: Frank Pscheidt-Denzler

Position: Testing Engineer

Signature

Name: Ulrich Jacobs

Position: Technical Certifier

Signature

Copyright © 2007 International Electrotechnical Commission Scheme for Certification to Standards Relating to Equipment for use in Explosiv e Atmospheres (IECEx), Geneva,

The version number of this report template is ExTR6 0079-11


This is a consolidated report, comprising all the r equirements of IECEx for the Cover Sheet Atmospheres Part 0: General Requirements and Part 1 1:

This report is to be compiled and verified by the ExTL, with the ExCB giving the final approval. ExTR Addendums and ExTR Report of National Differences may also supplement this ExTR.

This report shall only be used for a compliance verdict. If the assessment or test was not in compliance with the Standards, this report shall not be issued in its present format with IECEx

only to the specific object tested, and the assessment results relate only to the documents listed in the documents list of this report.

pages must be included on all pages of

This report shall not be reproduced except in full, unless written authority of the ExTL and

Signature

Signature

Commission Scheme for Certification to Standards Relating to Equipment for use in Explosiv e Atmospheres (IECEx), Geneva,





1 Scope Testing and assessment to the IEC 60079-0: 2004 and 60079-11:2006 was conducted on the associated intrinsic safety apparatus Siflow FC070 Ex. The group is IIC. The category is “ia”. The tests and assessments are limited to the standards aforementioned. 2 Equipment The supply unit Siflow FC070Ex is an intrinsically safe associated apparatus that is used as a power supply for flow sensors. The following samples were submitted for assessment and testing: The test samples are labeled with 71382451 / 76217333. 3 Test and assessment 3.1 General aspects 3.1.1 Description of enclosure 3.1.1.a Metallic enclosures – light metal requireme nts The enclosure consists of plastic materials. 3.1.1.b Non-metallic enclosure requirements The enclosure consists of plastic materials. Loss of the enclosure would not affect the type of protection. 3.1.2 Thermal endurance requirements (only for non- metallic enclosures using Annex F) The enclosure consists of plastic materials evidence of testing is given in the official TÜV SÜD Report: Technischer Bericht Nr. 71382447, Rev. 0 dated 30.03.2011. 3.1.3 Resistance to chemical agents (only Group I n on-metallic enclosures using Annex F) The group is II and Annex F was not conducted. 3.1.4 Impact test / assessment (only for enclosures using Annex F) Annex F was not conducted. As the tested equipment has to be installed in suitable enclosures with a minimum protection IP54 according to IEC 60529:2001. 3.1.5 Drop test / assessment The device is not a handheld electrical apparatus. 3.1.6 Ingress protection method and test (including gasket retention) The enclosure of the device has passed the test for IP20. For details of the test see [4]. 3.1.7 Resistance to light test / assessment

(only for non-metallic enclosures using Annex F) Annex F was not conducted.





3.1.8 Connection arrangement, including entry provi sions and transient protection requirements

The terminals for intrinsically safe circuits are separated from the terminals for non-intrinsically safe circuits by the method b) 3) given under the chapter 6.3.1 in IEC 60079-11:2006. The separation is ensured by non-metallic insulating partition. The partition consists of Noryl GFN 1 SE1, the same material like the enclosure, and has a thickness of 1,5mm. Due to the fact the partition is removable it is only allowed to put the device into operation, if the partition is correctly inserted. An accordant hint is stated in the manual and in the certificate. The clearances of the external intrinsically safe conductors are higher than 6mm. Therefore the requirements of chapter 6.3.1 according IEC 60079-11: 2006 are fulfilled. 3.1.9 Dielectric strength test The insulation between the intrinsically safe circuits and the non-intrinsically safe circuits was tested to withstand an r.m.s a.c. test voltage of 1500V. The test was passed. For details of the test see [3]. The insulation between the intrinsically safe circuits and parts which be earthed was tested to withstand an r.m.s a.c. test voltage of 500V. The test was passed. For details of the test see [3]. The insulation between the primary winding and secondary winding of the transformer was tested to withstand an r.m.s a.c. test voltage of 1500V. The test was passed. For details of the test see [3]. 3.1.10 Earthing, bonding and circulating currents The device does not require connection to earth. The intrinsically safe concept is based on the galvanic isolation between intrinsically safe circuits and the non-intrinsically safe circuits. This galvanic isolation is provided by a transformer and opto-isolators. 3.1.11 Encapsulation, including sealing test The device has no encapsulation. 3.1.12 Plastic electrostatic hazard assessment and tests For associated apparatus electrostatic hazard assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.1.13 Printed circuit board, conformal coating, an d coating to Annex F requirements The device consists of five printed circuit boards. The overall board thickness of each board is 1,6mm and it is a four layer construction. The CTI of the printed circuit board is greater than 175. For assessment of clearances and creepage distances see chapter 3.4. 3.1.14 Partitions, including earth screens See chapter 3.1.8. 3.1.15 Cable pull test No permanently connected cable used.





3.1.16 Internal connectors Failure of internal connection does not affect intrinsic safety. 3.1.17 Internal wiring There is no internal wiring. 3.1.18 Marking requirements, including warning mark ings The device is marked with the following: Name of the manufacturer – Siemens Type identification and model number – Siflow FC070 Ex The symbol [Ex ia] The Symbol IIC The serial number The name of the certificate issuer and the certificate reference [CoC], The device is marked with X, because of the special conditions

The ambient temperature range deviates from the standard ambient temperature range according IEC 60079-0:2004 (-40 ≤ tAmb. ≤ +60°C – evidence see TÜV SÜD Technical Report 71382447) The device shall only be putted into operation, if the partition is correctly inserted

3.1.19 Instructions, including live maintenance pro cedures (if any) The manuals [1] and [2] were assessed regarding the required instructions. All necessary instructions are included in the manuals. 3.1.20 Any other general aspects None 3.2 Spark ignition assessment and tests 3.2.1 Design of equipment to comply with spark igni tion requirements To met the spark ignition requirements the device includes voltage limiting units and current limiting elements at the outputs. The voltage limiting unit at the supply input consists of a transil diode parallel to a crowbar-circuit. The transil diode limits the voltage internal to 15V. This voltage limiting unit exits trice to met the level of protection “ia”. The voltage limiting units at the sensor inputs consist of two Diodes and one Z-Diode. The Z-diode limits the voltage internal under 10V. This voltage limiting unit exists once for each input and limits the voltage for the opto-isolators. Upstream of each voltage limiting unit there is a fuse to disconnect the circuit during overvoltage. The current limiting is realized with resistors at the output. 3.2.2 Apparatus supply and input/output parameters The intrinsic safe parameters are:

Um = 60V (SELV)

Sensor Driver Output, Connector X1, Terminal 3 and 4 Uo = 16V Io = 66mA





Po = 0,5W Lo = 5mH Co = 200nF

Sensor Pickup Input, Connector X1, Terminal 12, 13, 15 und 16 Uo = 15V Io = 7,5mA Po = 0,028W Lo = 20mH Co = 200nF

Sensor Temperature Input/Output, Connector X1, Terminal 5, 6, 18 und 19 Uo = 15V Io = 5,8mA Po = 0,022W Lo = 10mH Co = 200nF

3.2.3 Protection against polarity reversal Polarity reversal will not affect the type of protection. 3.2.4 Resistive spark ignition assessment and tests The assessment of spark ignition is accomplished with the annex A. The current assessed device Siflow FC070 Ex is a follow-up device of an existing already certified device. The current device should keep the intrinsically safe parameters of the predecessor device. Therefore it is to verify that the intrinsically safe parameters of the current device do not exceed the intrinsically safe parameters of the predecessor device.

Sensor Driver Output, Connector X1, Terminal 3 and 4 The voltage at the sensor driver output is limited by a shunt short-circuit to <16V. The shunt short-circuit exists twice. The current is limited by two resistors (R872,min= R873,min= 240Ω). The voltage before the resistors is limited by the crowbar-circuit and a transformer. The transformer is used with a center tapping and has a transmission ratio of 1:1. The crowbar-circuit limits the voltage at the transformer input to 15V. The outcome of this is a maximum voltage at the resistors of 30V. So the maximum output current is I0,max=30V/456Ω= 0,066A and the maximum output power is P0,max=0,49W. The intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Pickup Input, Connector X1, Terminal 12, 13, 15 und 16 The possible voltage at the sensor pickup input is limited by the crowbar-circuit to 15V. The current limitation ensured by resistors (Rmin=1980Ω) is I0=15V/1980Ω=7,58mA and the maximum output power P0=15V*7,58mA*0,25=0,028W. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Temperature Input/Output, Connector X1, Terminal 5, 6, 18 und 19 The possible voltage at the sensor pickup input is limited by the crowbar-circuit to 15V. The current limitation ensured by resistors (Rmin=2595,4Ω) is I0=15V/2595,4Ω=5,78mA and the maximum output power P0=15V*5,78mA*0,25=0,022W. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.





3.2.5 Capacitive spark ignition assessment and test s

Sensor Driver Output, Connector X1, Terminal 3 and 4 The maximum external capacitance according IEC 60079-11 Annex A for 16V is C0=460nF. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Pickup Input, Connector X1, Terminal 12, 13, 15 und 16 The maximum external capacitance according IEC 60079-11 Annex A for 15V is C0=580nF. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Temperature Input/Output, Connector X1, Terminal 5, 6, 18 und 19 The maximum external capacitance according IEC 60079-11 Annex A for 15V is C0=580nF. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

3.2.6 Inductive spark ignition assessment and tests

Sensor Driver Output, Connector X1, Terminal 3 and 4 The maximum external inductance for 0,066mA is L0=5mH. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Pickup Input, Connector X1, Terminal 12, 13, 15 und 16 The maximum external inductance for 7,58mA is L0=100mH. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable.

Sensor Temperature Input/Output, Connector X1, Terminal 5, 6, 18 und 19 The maximum external inductance for 5,78mA is L0=100mH. Hence the intrinsically safe parameters as listed in chapter 3.2.2 are acceptable. 3.2.7 Combination of resistive, capacitive and indu ctive assessment and tests 3.2.8 Let-through energy assessment and tests The crowbar-circuit is only used to protect the transil diode at over voltage. Therefore the crowbar-circuit is not used to limit the energy on at the output and has not to be assessed. 3.2.9 Any other spark ignition assessments and test s None 3.3 Thermal ignition assessment and tests 3.3.1 Design of equipment to comply with thermal ig nition requirements For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.2 Components temperature assessment and tests, including small component ignition

test





For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.3 Wiring temperature assessment and tests For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.4 Printed board tracks assessment and tests For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.5 Enclosure external temperature assessments an d tests For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.6 Service temperature determination and assessm ent For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.3.7 Any other thermal ignition assessments and te sts For associated apparatus thermal ignition assessment and tests are excluded according IEC 60079-11: 2006 table 1. 3.4 Segregation requirements The maximum input voltage that can be applied is Um=60V (SELV). According to table 5 of IEC 60079-11:2006 the minimum required clearance for this voltage is 3,0mm and the minimum required creepage distance is 3mm. The layout of the PCB was assessed regarding segregation requirements. For details of the test see [2]. For segregation requirements of the transformer see chapter 3.5.1. For segregation requirements of the opto-isolators see chapter 3.5.5. For segregation requirements of the resistors see chapter 3.5.3. For segregation requirements of the Fuses see chapter 3.5.7. 3.5 Safety components 3.5.1 Transformers The transformer, that separates galvanic the intrinsically safe circuit from the non intrinsically safe circuit, conforms with the type of construction according chapter 8.1.2 of the IEC 60079-11:2006. Primary and secondary windings are separated with a partition of 1,5mm thickness. Primary and secondary windings are located in a separated chamber to separate them from the iron core of the transformer. The shell of a chamber has a thickness of 0,5mm and a deformation resistance up to 270°C. The transformer was assessed regarding heati ng with secondary short-circuit and afterwards tested with high voltage. Both tests were passed and documented in [3]. 3.5.2 Resistors The current limiting resistors at the driver outputs conform to the type b) according chapter 8.4 of IEC





60079-11:2006 and have a minimal creepage distance of 15mm. See [1] chapter 7.5.1. The remaining current-limiting resistors conform to the type a) according chapter 8.4 of IEC 60079-11: 2006 and have a minimal creepage distance of 2.8mm. See [1] chapter 7.7. The rating of the resistors was assessed. The detailed calculation is documented in [1]. 3.5.3 Capacitors The capacitors C903 and C904 separate the shielding in the intrinsically safe area from the earth connection in the non intrinsically safe area. The capacitors are ceramic capacitors with a voltage resistance of 4KV DC. The capacitors C907 and C908 separate the shielding in the intrinsically safe area from ground. The capacitors are solid dielectric capacitors with a voltage resistance > 500V DC. See [1] chapter 7.9. 3.5.4 Semiconductors The current limitation is realized by fuses or resistors. The derating of the semiconductors is given in [1]. All for intrinsically safety relevant semiconductors exist trice. 3.5.5 Opto-isolators The Opto-Isolators have a minimum internal plastic gap of 1mm and fulfill the requirements according Table 5 of IEC 60079-11:2006 for 375V. The opto-isolators were assessed regarding derating, clearances and creepage distances. The test was passed. For details of the test see [1] chapter 7.3. 3.5.6 Relays The device contains no relay. 3.5.7 Fuses As a result of their mounting form (6,3mm*32mm) the fuses fulfill the requirements according Table 5 of IEC 60079-11:2006 for 375V. The fuses were assessed regarding derating and I2ts value. The test was passed. For details of the test see [3] and [1]. 3.5.8 Infallible connections Assessment of the PCB see chapter 3.1.13. 3.5.9 Infallible windings There are no infallible windings. 3.5.10 Any other safety components used None 3.5.11 Ratings of safety components The rating of the several safety components was assessed. The detailed calculation is documented in [1]. 3.6 Requirements of specific components 3.6.1 Batteries





The device does not contain batteries. 3.6.1.a Determination of charge capacity on dischar ge at normal load See chapter 3.6.1. 3.6.1.b Electrolyte leakage during charge with one cell fully discharged or with polarity reversal. See chapter 3.6.1. 3.6.1.c Electrolyte leakage during discharge into s hort circuit See chapter 3.6.1. 3.6.1.d Determination of equivalent internal resist ance See chapter 3.6.1. 3.6.1.e Spark ignition assessment or test See chapter 3.6.1. 3.6.1.f Surface temperature test when short circuit ed See chapter 3.6.1. 3.6.1.g Battery container ventilation and pressure test See chapter 3.6.1. 3.6.2 Piezo electric devices The device does not contain Piezo electric devices. 3.6.3 Optical and RF energy The device does not contain Piezo electric devices. 3.6.4 Safety barriers – assessments and tests The safety barrier was assessed regarding the terminals see chapter 3.1.8, degree of protection of the enclosure see chapter 3.1.6 and the marking see chapter 3.1.18. 3.6.5 Simple apparatus The device is not a simple apparatus. 3.6.6 Determination of parameters of loosely specif ied components The device contains no loosely specified components. 3.6.7 Ex components and their mounting method





The device is no Ex component. 3.6.8 Any other components None 4 Results The device complies with the requirements of IEC 60079-0:2004 and IEC 60079-11:2006. 5 Additional information None 6 Conditions 6.1 Conditions of manufacture 6.2 Conditions of safe use

• Ambient temperature -40°C < T amb < 60°C in case of horizontal montage of the module rack, -40°C < T amb < 50°C in case of vertical montage of the module rack

• When using the apparatus as a non sparking apparatus in zone 2, the apparatus has to be installed in a suitable enclosure with a minimal degree of protection of lP54 according to IEC 60529:2001.

• The separation bar between the intrinsically safe and the not intrinsically safe connectors has to be installed according to the installation manual.

7 Schedule The tests and assessments provided in this report are considered applicable to the following range of equipment:

• Siflow FC070 Ex 8 Documents The following documents were assessed in the course of preparing this report. The documents listed give a full and correct specification of the safety aspects of the electrical equipment.

Doc No.

Sheets Document Title Issue Date (yyyy/mm/dd)

[1] 75 Siflow FC070 Ex Gerätebeschreibung zur Zulassung gemäß ATEX-Richtlinie 94/9/EG Teil 1: Allgemeines, Schaltungsbeschreibung, Berechnungen; AE00513480C

5.0 2010 / 11 / 03

[2] 33 Siflow FC070 Ex Gerätebeschreibung zur Zulassung gemäß ATEX-Richtlinie 94/9/EG Teil 2: Aufbaubeschreibung, Layouts, Abstände AE00513480D

5.0 2010 / 11 / 03





[3] 24 CPU Board, Schematic Diagram A5E01079695A, variant A5E02829162 (CT)

DS03 2010 / 09 / 29

[4] 10 CPU Board, Parts List (BOM) A5E02829162 Rev. 02 2010 / 10 / 21 [5] 14 CPU Board, PCB Layout A5E00695968A, PDF

and Gerber Files DS03 2010 / 03 / 22

[6] 16 Interface Board, Schematic Diagram A5E01079696A, variant A5E02829163 (CT) DS03 2010 / 10 / 13

[7] 6 Interface Board, Parts List (BOM) A5E02829163 Rev. 02 2010 / 10 / 18 [8] 12 Interface Board, PCB Layout A5E00698410A, PDF


[9] 6 Safety Board, Schematic Diagram A5E01079697A, variant A5E02829164 (CT) DS04 2010 / 10 / 13

[10] 2 Safety Board, Parts List (BOM) A5E02829164 Rev. 02 2010 / 10 / 18 [11] 12 Safety Board, PCB Layout A5E00707248A, PDF


[12] 24 Sensor Board, Schematic Diagram A5E01079698A, variant A5E02829165 (CT) DS03 2010 / 09 / 19

[13] 12 Sensor Board, Parts List (BOM) A5E02829165 Rev. 03 2010 / 10 / 21 [14] 14 Sensor Board, PCB Layout A5E00703709A, PDF


[15] 5 Backplane, Schematic Diagram A5E01079699A DS01 2008 / 03 / 04 [16] 1 Backplane, Parts List (BOM) A5E01079699 Rev. 01 2008 / 11 / 10 [17] 12 Backplane, PCB Layout A5E00712869A, PDF and

Gerber Files DS02 2008 / 02 / 22

[18] 2 Laser labeling including type label, doc. A5E02829135A DS01 2010 / 11 / 03

[19] 2 Control Drawing, doc. A5E03069296A DS02 2010 / 11 / 03 [20] 1 Block diagram - 2009 / 09 / 18 [21] 1 Voltages and Distances - 2009 / 09 / 18 [22] 266 Operating Instructions:

SITRANS_FC070_S7_Oper_Instr_Eng.pdf 03/2011 2011 / 03 / 15

[23] 42 Operating Instructions (Compact): SIFLOW_FC070_Ex_CT_e-d.pdf 02/2011 2011 / 03 / 07





SECTION A COMPLIANCE CHECK LISTS Section A.1 IEC 60079-0:2004 Edition 4 Electrical apparatus for explosive gas atmospheres - Part 0: General requirements No: Heading of clause Report section

no., or ‘Excluded’ or ‘No requirement’

Notes

1 Scope 1 2 Normative references No requirement 3 Terms and definitions No requirement 4 Apparatus grouping and temperature classification 4.1 Apparatus grouping 1, 3.1.18 3.2 4.2 Group II 1, 3.2 4.2.1 Group II subdivisions 1, 3.2 4.2.2 Group II – Surface temperature marking 1, 3.1.18, 3.3 4.2.3 Apparatus for a particular explosive atmosphere 1, 3.1.18 5 Temperatures 5.1 Environmental influences 5.1.1 Ambient temperature 1, 3.1.18, 3.3 5.1.2 External source of heating or cooling 1, 3.3.1, 6.2 5.2 Service temperature 3.3.6 5.3 Maximum surface temperature 5.3.1 Determination of maximum surface temperature 3.3 5.3.2 Limitation of maximum surface temperature 5.3.2.1 Group I electrical apparatus 1, 3.3 5.3.2.2 Group II electrical apparatus 1, 3.3 5.4 Surface temperature and ignition temperature 1, 3.3 5.5 Small components 1, 3.3.2 6 Requirements for all electrical apparatus 6.1 General 1, 3, 4 6.2 Mechanical strength of apparatus 3.1.4, 3.1.5, 3.1.6 6.3 Opening times Excluded 6.4 Circulating currents 3.1.10 6.5 Gasket retention 3.1.6 7 Non-Metallic enclosures and non-metallic parts of enclosures 7.1 General 7.1.1 Applicability 3.1.1.b 7.1.2 Specification of materials 3.1.1.b 7.1.3 Plastic materials 3.1.1.b 7.2 Thermal endurance 3.1.2 7.3 Electrostatic charges on external non-metallic materials of enclosures 7.3.1 Applicability 3.1.12 7.3.2 Avoidance of a build-up of electrostatic charge 3.1.12, 3.1.18, 6.2 7.4 Threaded holes Excluded 8 Enclosures containing light metals 8.1 Material composition 8.1.1 Group I 3.1.1.a 8.1.2 Group II 3.1.1.a 8.2 Threaded holes Excluded 9 Fasteners Excluded 10 Interlocking devices Excluded





IEC 60079-0:2004 Edition 4 Electrical apparatus for explosive gas atmospheres - Part 0: General requirements No: Heading of clause Report section


Notes

11 Bushings Excluded 12 Materials used for cementing Excluded 13 Ex components 13.1 General 3.6.7 13.2 Mounting internal to apparatus 3.6.7 13.3 Mounting external to apparatus 3.6.7 14 Connection facilities and terminal compartments Excluded 15 Connection facilities for earthing or bonding

conductors Excluded

16 Entries into enclosures 16.1 General 16.2 Identification of entries 3.1.6, 3.1.8 16.3 Cable glands 3.1.6, 3.1.8 16.4 Blanking elements 3.1.8 16.5 Conductor temperature Excluded 17 Supplementary requirements for rotating electrical

machines Excluded

18 Supplementary requirements for switchgear Excluded 19 Supplementary requirements for fuses Excluded 20 Supplementary requirements for plugs and

sockets Excluded

21 Supplementary requirements for luminaires Excluded 22 Supplementary requirements for caplights and

handlights Excluded

23 Apparatus incorporating cells and batteries 3.6.1 23.1 Batteries 3.6.1 23.2 Cell types 3.6.1 23.3 Cells in a battery 3.6.1 23.4 Ratings of batteries 3.6.1 23.5 Mixture of cells 3.6.1 23.6 Interchangeability 3.6.1 23.7 Charging of primary batteries 3.6.1 23.8 Leakage 3.6.1 23.9 Connections 3.6.1 23.10 Orientation 3.6.1, 3.1.18, 6.2 23.11 Replacement of cells or batteries 3.6.1, 3.1.18, 6.2 24 Documentation 8 25 Compliance of prototype or sample with

documents 2, 3, 8

26 Type tests 26.1 General 2, 3, 7, 8 26.2 Test configuration 3 26.3 Tests in explosive test mixtures 3 26.4 Tests of enclosures 26.4.1 Order of tests







Notes

26.4.1.1 Metallic enclosures, metallic parts of enclosures and glass of parts of enclosures

3.1.4, 3.1.5, 3.1.6

26.4.1.2 Non-metallic enclosures or non-metallic parts of enclosures

3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6

26.4.1.2.1

Group I electrical apparatus 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7

26.4.1.2.2

Group II electrical apparatus 3.1.2, 3.1.4, 3.1.5, 3.1.6, 3.1.7

26.4.2 Resistance to impact 3.1.4 26.4.3 Drop test 3.1.5 26.4.4 Acceptance criteria 3.1.4, 3.1.5 26.4.5 Degree of protection (IP) by enclosures 26.4.5.1 Test procedure 3.1.6 26.4.5.2 Acceptance criteria 3.1.6 26.5 Thermal tests 26.5.1 Temperature measurement 1, 3.1.18, 3.3, 6.2 26.5.2 Thermal shock test Excluded 26.5.3 Small component ignition test 26.5.3.1 General 3.3.2 26.5.3.2 Procedure 3.3.2 26.5.3.3 Acceptance criteria 3.3.2 26.6 Torque test for bushings Excluded 26.7 Non-metallic enclosures or non-metallic parts of enclosures 26.7.1 General 3.1.1.b, 3.1.2,

3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7

26.7.2 Temperature during tests 3.3.6 26.8 Thermal endurance to heat 3.1.2 26.9 Thermal endurance to cold 3.1.2 26.10 Resistance to light 26.10.1 Applicability 3.1.7, 6.2 26.10.2 Test procedure 3.1.7 26.10.3 Acceptance criteria 3.1.7 26.11 Resistance to chemical agents for Group I

electrical apparatus 3.1.3

26.12 Earth continuity Excluded 26.13 Surface resistance test of parts of enclosures of

non-metallic materials 3.1.12

26.14 Charging tests 26.14.1 Introduction 3.1.12 26.14.2 Principle of the test 3.1.12 26.14.3 Samples and apparatus 3.1.12 26.14.4 Ambient conditions 3.1.12 26.14.5 Conditioning 3.1.12 26.14.6 Determination of the most efficient charging method







Notes

26.14.6.1 Method A: Rubbing with a pure polyamide cloth (Figure 6)

3.1.12

26.14.6.2 Method B: Rubbing with a cotton cloth 3.1.12 26.14.6.3 Method C: Charging by influence with a d.c. high-

voltage power supply (Figure 8) 3.1.12

26.14.7 Assessment of discharge 3.1.12 26.15 Measurement of capacitance 26.15.1 Test procedure 3.1.12 26.15.2 Acceptance criteria 3.1.12 27 Routine verifications and tests 6.1 28 Manufacturer’s responsibility 28.1 Certificate No requirement 28.2 Responsibility for marking No requirement 29 Marking 29.1 Location 3.1.18 29.2 General 3.1.18 29.3 Different type of protection 3.1.18 29.4 Order of marking 3.1.18 29.5 Ex components 3.1.18 29.6 Small apparatus and Ex components 3.1.18 29.7 Extremely small apparatus and Ex components 3.1.18 29.8 Warning markings 3.1.18 29.9 Cells and batteries 3.1.18 29.10 Examples of marking3 3.1.18 30 Instructions 30.1 General 3.1.19 30.2 Cells and batteries 3.1.19 Annex A Ex cable glands Excluded

Annex B Requirements for Ex components 3.6.7

Annex C Example of rig for resistance to impact test 3.1.4





Section A.2 IEC 60079-11:2006 Edition 5 Explosive atmospheres - Part 11: Equipment protecti on by intrinsic safety “i” No: Heading of clause Report section


Notes

1 Scope 1 2 Normative references No requirement 3 Terms and definitions No requirement 4 Grouping and classification of intrinsically safe

apparatus and associated apparatus 1

5 Levels of protection and ignition compliance requirements of electrical apparatus 5.1 General 1, 3.1.18, 3.1.19,

3.2.1, 3.2.2, 3.3.1, 3.4, 6.2

5.2 Level of protection “ia” 1, 3.1.18, 3.2, 3.3, 3.4

5.3 Level of protection “ib” 1, 3.1.18, 3.2, 3.3, 3.4

5.4 Level of protection “ic” 1, 3.1.18, 3.2, 3.3, 3.4

5.5 Spark ignition compliance 3.2 5.6 Thermal ignition compliance 5.6.1 General 3.3 5.6.2 Temperature for small components 3.3.2 5.6.3 Wiring within apparatus 3.3.3 5.6.4 Tracks on printed circuit boards 3.3.4 5.7 Simple apparatus 3.6.5 6 Apparatus construction 6.1 Enclosures 3.1.1, 3.1.6 6.1.1 Apparatus complying with Table 5 3.1.1, 3.1.5, 3.1.6,

3.4

6.1.2 Apparatus complying with Annex F 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.13, 3.4

6.2 Facilities for connection of external circuits 6.2.1 Terminals 3.1.8, 3.4 6.2.2 Plugs and sockets 3.1.8, 3.1.10, 3.4 6.2.3 Determination of maximum external inductance to

resistance ratio (Lo/Ro) for resistance limited power source

3.2.2, 3.2.6

6.2.4 Permanently connected cable 3.1.8, 3.1.15 6.3 Separation distances 3.4 6.3.1 Separation of conductive parts 3.1.14, 3.2.1, 3.3.1

3.4

6.3.1.1 Distances according to Table 5 3.4 6.3.1.2 Distances according to Annex F 3.4 6.3.2 Voltage between conductive parts 3.4 6.3.3 Clearance 3.1.14, 3.4 6.3.4 Separation distances through casting compound 3.1.9, 3.1.11, 3.4 6.3.5 Separation distances through solid insulation 3.1.9, 3.4 6.3.6 Composite separations 3.4 6.3.7 Creepage distance 3.1.13, 3.1.14, 3.4





IEC 60079-11:2006 Edition 5 Explosive atmospheres - Part 11: Equipment protecti on by intrinsic safety “i” No: Heading of clause Report section


Notes

6.3.8 Distance under coating 3.1.13, 3.4 6.3.9 Requirements for assembled printed circuit boards 3.1.13, 3.4 6.3.10 Separation by earth screens 3.1.10, 3.1.14, 3.4 6.3.11 Internal wiring 3.1.9, 3.1.17, 3.4 6.3.12 Dielectric strength requirement 3.1.9 6.3.13 Relays 3.1.10, 3.1.14, 3.4,

3.5.6

6.4 Protection against polarity reversal 3.2.3 6.5 Earth conductors, connections and terminals 3.1.8, 3.1.10 6.6 Encapsulation 3.1.11 7 Components on which intrinsic safety depends 7.1 Rating of components 3.2.2, 3.5.11 7.2 Connectors for internal connections, plug-in cards

and components 3.1.10, 3.1.16

7.3 Fuses 3.1.11, 3.2.2, 3.5.7, 3.5.11

7.4 Primary and secondary cells and batteries 3.6.1 7.4.1 General 3.1.18, 3.1.19,

3.6.1, 6.2

7.4.2 Electrolyte leakage and ventilation 3.1.11, 3.6.1.b, 3.6.1.c

7.4.3 Cell voltages 3.2.1, 3.3.1, 3.6.1 7.4.4 Internal resistance of cell or battery 3.6.1.d 7.4.5 Batteries in apparatus protected by other means of

protection 3.2.1, 3.2.2, 3.5.11

3.6.1, 6.2

7.4.6 Batteries used and replaced in explosive gas atmospheres

3.1.5, 3.1.11, 3.6.1

7.4.7 Batteries used but not replaced in explosive gas atmospheres

3.1.5, 3.1.18, 3.1.19, 3.6.1

7.4.8 External contacts for charging batteries 3.1.8, 3.2.2, 3.6.1 7.4.9 Battery construction 3.1.11, 3.2.3, 3.6.1 7.5 Semiconductors 7.5.1 Transient effects 3.5.4 7.5.2 Shunt voltage limiters 3.2.8, 3.5.4, 3.5.11 7.5.3 Series current limiters 3.5.4, 3.5.11 7.6 Failure of components, connections and

separations 1, 3.1.17, 3.2.1,

3.2.5, 3.2.6, 3.3.2, 3.5.11

7.7 Piezo-electric devices 3.6.2 7.8 Electrochemical cells for the detection of gases 3.2.1, 3.2.4, 3.2.5 8 Infallible components, infallible assemblies of

components and infallible connections on which intrinsic safety depends

1, 4

8.1 Mains transformers 3.5.1 8.1.1 Protective measures 3.5.1, 3.5.7, 3.5.11 8.1.2 Transformer construction 3.1.9, 3.4, 3.5.1,

3.5.7, 3.5.11







Notes

8.1.3 Transformer type tests 3.1.9, 3.4, 3.5.1, 3.5.11

8.1.4 Routine test of mains transformers 3.5.1, 6.1 8.2 Transformers other than mains transformers 3.5.1, 3.5.11, 6.1 8.3 Infallible windings 8.3.1 Damping windings 3.5.9, 3.5.11 8.3.2 Inductors made by insulated conductors 3.5.9, 3.5.11 8.4 Current-limiting resistors 3.5.2, 3.5.11 8.5 Blocking capacitors 3.1.9, 3.5.3, 3.5.11 8.6 Shunt safety assemblies 8.6.1 General 3.2.8, 3.5.4, 3.5.7,

3.5.11

8.6.2 Safety shunts 3.5.4 8.6.3 Shunt voltage limiters 3.5.4 8.7 Wiring, printed circuit board tracks, and connections 3.1.13, 3.1.16,

3.5.8

8.8 Galvanically separating components 8.8.1 General 3.5.5, 3.5.6 8.8.2 Isolating components between intrinsically safe and

non-intrinsically safe circuits 3.1.9, 3.5.5, 3.5.6,

3.5.11

8.8.3 Isolating components between separate intrinsically safe circuits

3.1.9, 3.5.5, 3.5.6, 3.5.11

9 Diode safety barriers 9.1 General 3.5.4, 3.5.11, 3.6.4,

6.1

9.2 Construction 9.2.1 Mounting 3.6.4 9.2.2 Facilities for connection to earth 3.1.10, 3.6.4 9.2.3 Protection of components 3.1.1, 3.1.11, 3.6.4 10 Type verifications and type tests 10.1 Spark ignition test 10.1.1 General 3.2, 3.4 10.1.2 Spark test apparatus 3.2, 3.4, 3.5.8 10.1.3 Test gas mixtures and spark test apparatus calibration current 10.1.3.1 Explosive test mixtures suitable for tests with a

safety factor of 1.0 and calibration current of the spark test apparatus

3.2

10.1.3.2 Explosive test mixtures suitable for tests with a safety factor of 1.5 and calibration current of the spark test apparatus

3.2

10.1.4 Tests with the spark test apparatus 10.1.4.1 Circuit test 1, 3.2 10.1.4.2 Safety factors 1, 3.2 10.1.5 Testing considerations 10.1.5.1 General 3.2 10.1.5.2 Circuits with both inductance and capacitance 3.2.7







Notes

10.1.5.3 Circuits using shunt short-circuit (crowbar) protection

3.2.4, 3.2.8

10.1.5.4 Results of spark tests 3.2 10.2 Temperature tests 3.3, 3.3.2, 3.3.3,

3.3.4, 3.5.1

10.3 Dielectric strength tests 3.1.9, 6.1 10.4 Determination of parameters of loosely specified

components 3.6.6

10.5 Tests for cells and batteries 10.5.1 General 3.6.1, 3.1.6.1.a 10.5.2 Electrolyte leakage test for cells and batteries 3.6.1.b, 3.6.1.c 10.5.3 Spark ignition and surface temperature of cells and

batteries 3.6.1.d, 3.6.1.e,

3.6.1.fsection3_6_1

10.5.4 Battery container pressure tests 3.1.2, 3.1.5, 3.4, 3.6.1.g

10.6 Mechanical tests 10.6.1 Casting compound 3.1.4,

3.1.11section3_1_7

10.6.2 Sealing of components before encapsulation 3.1.11, 3.5.7 10.6.3 Partitions 3.1.14 10.7 Tests for apparatus containing piezoelectric devices 3.1.4, 3.6.2, 6.2 10.8 Type tests for diode safety barriers and safety

shunts 3.5.4, 3.6.4

10.9 Cable pull test 3.1.15section3_1_11 10.10 Transformer tests 3.1.9, 3.5.1 11 Routine verifications and tests 11.1 Routine tests for diode safety barriers 11.1.1 Completed barriers 3.6.4, 6.1 11.1.2 Diodes for 2-diode “ia” barriers 3.6.4, 6.1 11.2 Routine tests for infallible transformers 3.1.9, 3.5.1, 6.1 12 Marking 12.1 General 3.1.18 12.2 Marking of connection facilities 3.1.6, 3.1.8, 3.1.18 12.3 Warning markings 3.1.18, 6.2 12.4 Examples of marking 3.1.18 13 Documentation 3.1.18, 3.1.19,

3.2.2, 6.2, 8

Annex A Assessment of intrinsically safe circuits A.1 Basic criteria 3.2, 3.3, 3.4 A.2 Assessment using reference curves and tables 3.2 A.3 Examples of simple circuits No requirement A.4 Permitted reduction of effective capacitance when

protected by a series resistance 3.2.5

Annex B Spark test apparatus for intrinsically safe circuits B.1 Test methods for spark ignition B.1.1 Principle 3.2 B.1.2 Apparatus 3.2







Notes

B.1.3 Calibration of spark test apparatus 3.2 B.1.4 Preparation and cleaning of tungsten wires 3.2 B.1.5 Conditioning of new cadmium disc 3.2 B.1.6 Limitations of the apparatus 3.2 B.1.7 Modifications of test apparatus for use at higher

currents 3.2

Annex C Measurement of creepage distances, clearances and separation distances through casting compound and through solid insulation (informative only)

C.1 Clearances and separation distances through casting compound and through solid insulation

3.4

C.2 Creepage distances 3.4 Annex D Encapsulation (informative only) D.1 Adherence 3.1.11 D.2 Temperature 3.1.11section3_1_7 Annex E Transient energy test (informative only) E.1 Principle 3.2.8 E.2 Test 3.2.8 Annex F Alternative separation distances for assembled printed circuit boards and

separation of components F.1 General 1, 3.1.6, 3.1.13,

3.1.18, 3.1.19, 3.5.5, 3.5.6

F.2 Control of pollution access 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6,

3.1.7, 3.1.11, 3.1.13, 3.1.18, 3.1.19, 3.4, 6.2

F.3 Distances for printed circuit boards and separation of components F.3.1 Level of protection “ia” and “ib” 3.1.11, 3.1.13,

3.1.18, 3.1.19, 3.4, 6.2

F.3.2 Level of protection “ic” 3.1.8, 3.1.13, 3.1.18, 3.1.19, 3.4,

6.2