Data Sheet SS/AK100 Issue 9 ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series .. ATEX compliant – intrinsically safe to II (1)G CENELEC EEx ia IIC T4 .. Safety – early warning of hazardous hydrogen/air mixtures .. Cost savings – maintenance of hydrogen purity ensures efficient cooling of the alternator to optimize plant performance .. Choice – separate display units for hydrogen purity and purge gas for ease of use and duplicate systems for enhanced security .. Low cost of ownership – no moving parts and just one consumable item ensure minimal maintenance and running costs .. Confidence – ABB has over 80 years experience of katharometer design and operation Superior technology and quality from the world leader in hydrogen measurement

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 2 General The AK100 range of instruments is designed to provide reliable and accurate hydrogen purity and purge gas measurement to ensure the safe and efficient operation of hydrogen cooled turbo-generators. Hydrogen Purity Modern high capacity turbo-generators need to be cooled efficiently. Hydrogen, with a thermal conductivity of about seven times that of air, is in general use as the coolant. Any drop in hydrogen purity during operation of the machine has two adverse effects: The first, and most...

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 3 Katharometer Principle of operation The AK100 range of gas analyzers utilize thermal conductivity as its principle for measurement. When a constant current is passed through an electrical conductor surrounded by gas in a chamber, the temperature rises to a point of thermal equilibrium. Provided radiation, convection and end-conduction losses are minimized, the temperature of the conductor depends upon the heat loss by conduction through the gas. The temperature attained is therefore related to the...

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 4 AK101 Hydrogen Purity and Purge Gas Analyzer Industry standard version comprising: Two gas analysis panels, the first measuring hydrogen purity and the second measuring the two purge gas ranges. Two power supply units. One display monitor containing two digital transmitters. The upper transmitter displays hydrogen purity and the lower transmitter displays the two purge gas ranges. The range selector switch controls the range to be displayed and deactivates the unused transmitter display as appropriate....

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 5 * Carbon dioxide standard; argon or nitrogen also available AK101 Purity and Purge Gas Analyzer System AK102 Dual 3-Range Analyzer System '( ' ( ) )*+ '( * ' ( ,!- *,!- . . ) )*+ '( '( ' ( ) )*+ ' ( * ,!- *,!- * ,!- *,!- . . ) )*+

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 6 * Carbon dioxide standard; argon or nitrogen also available AK103 Single 3-Range Analyzer System AK104 Hydrogen Purity Analyzer '( ' ( ) )*+ ' ( * ,!- *,!- . ) )*+ '( ' ( ) )*+ ' ( * . ) )*+

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 7 Low and High Pressure Systems The schematic diagrams below show typical arrangements, identifying the types of low or high pressure gas analyzer panels. Low Pressure System – Sample Vented High Pressure System – Sample Non-vented /00 !! 1 2 23 4!! $50! *6 '7 ( ,! *6 '7 ( $50 ) 85+!- Note. All valves except * fully open during operations /00 $50! *6 '7( ,! *6 '7( $501 , 85+!- Note. All valves except * fully open during operations

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 8 Specification 6553 Gas Monitor Approvals CENELEC approved EEx ia IIC Tamb –20°C to +40°C BASEEFA Certificate No. BAS 01 ATEX 7043 II (1)G Ranges (a) 80% or 85% to 100% H2 in air (b) 0 to 100% H2 in Purge Gas * (c) 0 to 100% air in Purge Gas * Range Selector Switch Positions (when fitted) 1 – percentage by volume, hydrogen in air 2 – percentage by volume, hydrogen in purge gas * 3 – percentage by volume, air in purge gas * Accuracy (display units) ± 0.25% of scale span Ambient Temperature Range 0...

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 9 4234 Power Supply Unit Approvals CENELEC approved [EEx ia] IIC Tamb –20°C to +55°C BASEEFA Certificate No. BAS 01 ATEX 7041 II (1)G Input Voltage 115V AC 50/60Hz (4234501) or 230V AC 50/60Hz (4234500) Fuse Rating 250mA HRC ceramic DC Output 350mA stabilized ±0.14% Load Conditions Ambient Temperature Range –20 to 55°C (–4 to 131°F) Supply Variations ±15V (115V supply) or ±30V (230V supply) 46 to 64Hz Regulation Within ± 0.5% for: Load variation of ± 15% Supply variation of ± 15% Ambient temperature...

ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series SS/AK100 Issue 9 11 Ordering Information Model 6553 Monitor '2( A=5 .! $:! B! +C +! +3 D! /=@!! '2( 7 '72 ( +3D 0 !0: '2( '2 ( '2( Intrinsically Safe Power Supply Unit (Model 4234500 or 4234501) '2( '2( ' 2 ( '2( '2 ( <$! '2(<'2(B '2 ( '2 ( +3D ,! ATEX Compliant Gas Analyzer for Hydrogen-cooled Alternators AK10 X / X X X X X X X Display Monitor Unit Separate H2 Purity & Purge Gas Displays Dual 3-range Displays (H2 Purity and 2 x Purge Gas) Single 3-range (H2 Purity and 2 x Purge Gas) Single Hydrogen Purity Display...

SS/AK100 Issue 9 ATEX Compliant Gas Analyzer System for Hydrogen-cooled Alternators AK100 Series ABB has Sales & Customer Support expertise in over 100 countries worldwide www.abb.com The Company’s policy is one of continuous product improvement and the right is reserved to modify the information contained herein without notice. Printed in UK (07.2009) © ABB 2009 ABB Limited Oldends Lane, Stonehouse Gloucestershire GL10 3TA UK Tel: +44 (0)1453 826661 Fax: +44 (0)1453 829671 ABB Inc. 125 E. County Line Road Warminster PA 18974 USA Tel: +1 215 674 6000 Fax: +1 215 674 7183