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IFD-E(IS)

Intrinsically Safe Flame Detector

User Manual

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Содержание IFD-E

Страница 1: ...IFD E IS Intrinsically Safe Flame Detector User Manual ...

Страница 2: ... storing gases solvents paints and other volatile substances Electrical equipment for use in these areas needs to be designed so that it cannot ignite an explosive mixture not only in normal operation but also in fault conditions There are a number of methods available to achieve this oil immersion pressurised apparatus and powder filling for example but the two most common used are flameproof enc...

Страница 3: ... very high level of protection in which explosive atmosphere mixtures of air gases vapours or mist are present continuously for long periods 0 2 high level of protection in which explosive atmosphere mixture of air and gases vapours or mist are likely to occur 1 3 normal level of protection in which explosive atmosphere mixtures of air and gases vapours or mist are unlikely to occur and if it occu...

Страница 4: ...are approved IIC for listed gases in EN 50014 Table 4 Subdivisions of Group II Gases Temperature Class Referred to ambient of 20 C to 40 C Maximum Surface Temperature T6 85 C T5 100 C T4 135 C T3 200 C T2 300 C T1 450 C Detectors approved to T4 at 40 C Table 3 Temperature Classifications Code Type of Protection Code Equipment Category ia Intrinsic safety 1 ib Intrinsic safety 2 d Flameproof 3 Thes...

Страница 5: ...roduced by flames typically 1 to 15Hz The detectors ignore fixed light sources and rapidly flickering illumination predominantly produced by lighting The flame flicker techniques have the advantage of still allowing the detection of flames through a thin layer of oil water vapour ice or dust This makes these detectors particularly useful in industrial applications Full details of the principles of...

Страница 6: ...ve or negative polarity where the polarity refers to the polarity of the applied voltage relative to earth The significance of this is that one side of the barrier must be connected to a high integrity safety earth Although this connection has no effect on the operation of the flame detector and is not needed for their correct operation it may not be acceptable to the operation of the control and ...

Страница 7: ...Having the following or lower output parameters Max output volts Uo 30V Max output current Io 100mA Max output power Po 0 65W A number of barriers meet this specification and examples are given below Supplier Type Polarity Mounting Technique Pepperl Fuchs Ltd 77 Ripponden Road Oldham Lancashire OL2 8PF United Kingdom www pepperl fuchs com Z728 Z779 Z828 KFD0 CS Ex1 51 KFD0 CS Ex2 51 DIN rail DIN r...

Страница 8: ... have zero equivalent inductance Li 0 and a 0 03 F capacitance Ci 0 03 F Gas group IIA IIB IIC Capacitance F Inductance mH L R ratio H ohm 2 15 33 6 440 0 65 12 6 165 0 083 4 2 55 Table 6 28V Barrier Maximum Permissible Stored Energy in Cables Cable Type Core Size mm Conductor resistance ohm km core Inductance mH km Capacitance µF km Sheath Resistance ohm km core to core core to sheath MICC Pyrten...

Страница 9: ... bonding terminals are provided for convenience where continuity of a cable sheath or similar is required Service Repairs Servicing of IS flame detectors may be carried out only by a BASEEFA or equivalent authorised body In practical terms this means that IS flame detector may be serviced only at the manufactures factory Servicing of the fire protection system should be carried out as recommended ...

Страница 10: ...tus for one minute NOTE 3 The installation must comply with national installation requirements for example to EN 60079 14 NOTE 4 The capacitance and either the inductance or the inductance to resistance L R ratio of the hazardous area cables must not exceed the maximum permissible parameters for the required groups IIA IIB and IIC NOTE 5 The cable may be separate cables or a twin pair contained in...

Страница 11: ...il sales hochikieurope com Web www hochikieurope com Hochiki Europe UK Ltd reserves the right to alter the specification of its products from time to time without notice Although every effort has been made to ensure the accuracy of the information contained within this document it is not warranted or represented by Hochiki Europe UK Ltd to be a complete and up to date description Please check our ...

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