BEKA BA327SE Application Manual

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Application Guide

AG321

Installation of

[extra low voltage dc]

Ex ec instrumentation

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Summary of Contents for BEKA BA327SE

Page 1 Application Guide AG321 Installation of [extra low voltage dc] Ex ec instrumentation...
Page 2 UK and our products are purchased by end users, major instrument companies and contractors worldwide. Since the installation of the first BEKA intrinsically safe loop powered indicator in 1984, BEKA associates have been at the forefront of...
Page 3: Table Of Contents
Contents Foreword Inspection Introduction 10. Maintenance Other types of Zone 2 protection The use of backlighting Field wiring requirement 12. The use of alarms Editorial notes 12.1 General Installation practice for ‘Ex ec’ circuits 12.2 Indicator alarms Safe area apparatus 12.3 Alarm circuits Use of multi-cores...
Page 4: Introduction
BEKA 4-20mA indicators BA307SE measures are applied to electrical equipment (4 digit) and BA327SE (5 digit) are used to illustrate or Ex components to give increased security the construction and marking requirements. Their against the possibility of excessive temperature application in various ways is used to illustrate the more and against the occurrence of arcs and sparks’.
Page 5: Field Wiring Requirement
2.2 Field wiring requirement EDITORIAL NOTES The requirements for field wiring for Ex ec circuits are This document uses the term ‘safe area’ as the identical with those for all other electrical systems in designation for a location where there is no significant explosive atmospheres with the exception of intrinsic risk of a flammable, ignitable or hazardous mixture of safety.
Page 6: Installation Practice For Ex Ec Circuits
INSTALLATION PRACTICE FOR Ex ec CIRCUITS 4.1 Safe area apparatus The choice of equipment for use in an Ex ec circuit in There are two forms of multicore which are not the safe area is quite simple. It must be reasonably considered to develop faults between circuits.
Page 7: Junction Boxes
The unused entries do need to be sealed with an appropriate plug, a reasonable ‘rule of thumb’ is always use a box at least one size bigger than you think is necessary. The choice of material of the box is usually decided by a r d local preference but it should ensure adequate resistance to corrosion, for example by the use of stainless steel.
Page 8 Ferrules clamped Adequate clearance over the exposed between circuits conductors of and to earth. individual cores. Marking Ferrule. facility. Short bar. Avoids more than one lead per terminal. Any crimp/ferrule used must be suitable for the cable cores in use and must be crimped using a ratchet pre-torqued crimping tool.
Page 9: Area Classification (Zones)
Bund Sump Bund BEKA indicators BA307SE (4 digit) Figure 5 Typical area classification of storage tank BA327SE (5 digit) Zone 1 Hazardous atmosphere present periodically or occasionally in normal operation (10 to 1000 hrs / annum) E. T. L. Ga and Gb Category 1 and 2...
Page 10: Constructional Requirements
However the cost and UKEX Ex ec certification for their BA307SE and is increased. BA327SE indicators on which are based their EU and UK Declarations of Conformance. Both indicators also Non-metallic enclosures, and those containing non- have North American Ex ec certification, see section 14.
Page 11: Analysis Of Marking Requirements
6.3 Analysis of marking requirements There are 5 documents relevant to the use of Ex ec BEKA For completeness an analysis of the IECEx, ATEX and indicators in hazardous areas. UKEX marking is included which involves some repetition. BEKA BA307SE & BA327SE indicators are used as an The IECEx Ex ec certificate example.
Page 12: Documentation
The ATEX and UKEX marking requirements for a gas The BEKA BA307SE indicator label is shown in Figure 6. hazard are The label includes dust and North American certifications. The CE and UKCA logos, which are justified by the ATEX certificate indicator’s Declaration of Conformities, are required to...
Page 13 Ex e enclosure The BA307SE when mounted as recommended by have Ex e certification. the manufacturer BEKA does not invalidate the Ex e enclosure certification. The total power dissipation NOTE 7: The screens are carefully terminated to...
Page 14: Typical Circuits Using An Ex Ec Indicator In Zone
8.1 Common factors All the diagrams use a power supply and receiving The Ex e enclosure in which the BA307SE or BA327SE is equipment block to illustrate the equipment used in the mounted should be bonded to a local earthing point or the safe area.
Page 15 Hazardous Area Safe Area Zone 2 IIC 24V power supply and BA307SE receiving equipment Instrument DIN rail 1 2 3 4 mounting isolating fuse holder 4-20mA 4-20mA To plant reference point Ex e 100mA gland Ex e enclosure Figure 8. Indicator in Zone 2 monitoring safe area instrument Hazardous Area Safe Area Zone 2 IIC...
Page 16 Hazardous Area Hazardous Area Safe Area Zone 1 Zone 2 24V power supply and BA307SE receiving equipment Ex e Equipment DIN rail 1 2 3 4 mounting isolating fuse holder 4-20mA 4-20mA To plant reference point Ex e 100mA gland Ex e enclosure Figure 10.
Page 17 Hazardous Area Hazardous Area Safe Area Zone 1 or 2 IIC Zone 2 IIC 24V power supply and receiving equipment BA307SE Supply Ex p Instrument DIN rail 1 2 3 4 mounting isolating fuse holder 4-20mA 4-20mA Ex p Gland To plant reference point Ex e...
Page 18: Inspection
BEKA associates or to by removing and retaining the fuses. It is always worthwhile the local BEKA agent. No attempt should be made to repair to check that the circuit is isolated before working on it.
Page 19: The Use Of Backlighting
THE USE OF BACKLIGHTING Indicator display backlighting is a factory fitted indicator There are two possible circuits as illustrated in Figures 15 option which can be loop or separately powered, both of and 16. which are included in the Ex ec certification. The choice of method can be made or changed on-site, but any Where the power supply is common to the signal and disconnection should only be made with the circuit isolated.
Page 20 Hazardous Area Hazardous Area Safe Area Zone 1 Zone 2 24V power supply and Ex d receiving equipment BA307SE DIN rail mounting 1 2 3 4 12 13 14 isolating fuse holder 4-20mA + 22mA 4-20mA 22mA 4-20mA To plant reference point Ex e 100mA...
Page 21: The Use Of Alarms
12.2 Indicator alarms use in intrinsically safe circuits but these are complex and The BA307SE and BA327SE indicators can be supplied not generally practicable and usually a better solution is to with a factory fitted dual alarm module, each alarm having use an intrinsically safe indicator.
Page 22 Hazardous Area Hazardous Area Safe Area Zone 1 Zone 2 BA307SE Alarm Power indicator supply 1 2 3 4 8 9 10 11 100mA Solenoid valve 100mA Ex d 24V power supply and receiving equipment 100mA 4-20mA 4-20mA To plant Ex e reference point gland...
Page 23: Use In A Pressurised Enclosure
Class II Division 2 Groups E, F, G Class III Division 2 An additional Specific Conditions of Use is specified when a BA307SE or BA327SE indicator is mounted in an Ex pzc -40ºC ≤ Ta ≤ +70ºC enclosure. The prospective short circuit current of the...
Page 24 This allows AEx ec and Ex ec apparatus certified in the Requirement standard contain USA and Canada, such as the BA307SE and BA327SE to national deviations permitting the following additional product markings. also be marked and to be installed in Division 2.
Page 28 BEKA associates Ltd. Old Charlton Road., Hitchin, Herts. SG5 2DA UK Tel: (01462) 438301 Fax: (01462) 453971 e-mail sales@beka.co.uk www.beka.co.uk 11/10/2023 Issue 1...

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