Overview Standard automotive type alternators are a continuous potential source of ignition when operated in hazardous atmospheres where combustible concentrations of gas, vapor or dusts may exist. To overcome this, Chalwyn offer a range of ATEX approved flameproof alternators designed specifically to mount on diesel engines as direct replacements for standard alternators. Features and Benefits ATEX and IECEx Certified for Hazardous Zones 1 or 2 Speed signal output for overspeed shutdown Compact high performance design Certified cable gland included (side or rear mounted) Wide choice of optional pulleys Suitable for offshore conditions Applications For use in hazardous areas classified as Zone 1, Gas Group IIB, T4 and Dust Group IIIC, T135 Suitable for local ambient temperature range -30 C to +55 C Designed as a belt driven diesel engine mounted alternator page 1
Specifications Standard materials Enclosure Aluminum Fan, fan discs, pulleys Carbon steel Cowls Copper Excitation ASX-200, -201, -300, -301, -400, -401 Externally excited ASX-310 Self-excited Area Classification Zone 1, Group IIB Temperature Class T4 Ambient ASX-200, -201, -300, -301-30 C to 55 C (-22 F to 131 F) temperature range ASX-400, -401-30 C to 50 C (-22 F to 122 F) Voltage ASX-300, -301, -310, -400, -401 28V ASX-200, -201 14V Weight (estimated) Product Weight ASX-2XX, -3XX 7.2 kg (161.1 lbs) 12.9 kg (28.4 lbs) Shipping Weight ASX-2XX, -3XX 8 kg (17.5 lbs) 16.1 kg (36 lbs) Current ASX-200, -201, -400, -401 50A @ 14V ASX-300, -301, -310 25A @ 28V Certifications Ingress protection IP66 Equipment ASX-2XX, -3XX SIRA 99ATEX1127X Classification SIRA 07ATEX1171X Description Twelve pole rotating field coil type alternators are designed and approved as Category 2G/D equipment. An example of alternator markings is shown in Figure 1. A number of alternative single or multigroove pulleys are available. Contact factory for up to date details of the standard range. Special pulleys are also available to meet customer design requirements. How to Order DIESEL PROTECTION SYSTEMS by AMOT ROPER INDUSTRIES LTD BURY ST EDMUNDS, IP33 3SZ, UK 0518 SIRA 99ATEX1127 TYPE ASX-300 SERIAL No. XXXXX Ex IIB T4 Gb (Tamb= -30 C TO 55 C) Ex IIIC T135 Db IP66 II 2 G/D TMAX 125 C OUTPUT 28V 25A MAX DO NOT OPEN WHEN EXPLOSIVE GAS AND/OR DUST ATMOSPHERE IS PRESENT Figure 1 Model ASX - A B C A Output 2 14V 50A 3 28V 25A 4 28V 50A B Excitation 0 Externally Excited 1 Self-exciting C Cable Gland 0 Side Entry* 1 Rear Entry** * If side entry option is selected, the rear cover of alternator may be rotated to various positions -see dimension drawings. ** Four (4) rear entry gland positions are possible by unbolting and rotating the removable rear cover. page 2
Pulley Selection Flameproof Alternators Using the table below, select the pulley profle, appropriate width and drive diameter. Take into account the alternator speed range when selecting the diameter of the pulley. When fitting a pulley use an 8mm hexagonal Allen drive in the rotor hole and tighten the nut supplied to 60 NM (44 lb ft) torque. If a non-chalwyn pulley is to be fitted, please forward design details to local factory office. Pulley Profile Belt Width Drive Diameter (mm) Pulley Model No. SPA (Small) 1/2 / 13mm 55 ASX-546 SPA (Medium) 1/2 / 13mm 71 ASX-549 SPA (Large) 1/2 / 13mm 80 ASX-574 SPB (Small) 5/8 / 16mm 66 ASX-539 SPB (Medium) 5/8 / 16mm 71 ASX-548 SPB (Large) 5/8 / 16mm 90 ASX-563 6 Groove Poly-V DIN 6-PK 56 ASX-575 6 Groove Poly-V DIN 6-PK 66 ASX-556 Twin Groove SPB 2 5/8 / 16mm TBA ASX-557* Twin Groove SPC 2 3/4 / 19mm 80 ASX-573* 8 Groove Poly-V DIN 8-PK 67 ASX-570* 10 Groove Poly-V DIN 10-PK 71 ASX-571* 12 Groove Poly-V DIN 12-PK 75 ASX-572* Speed calculation formula * (fits ASX-400/401) Crankshaft pulley diameter (mm) X Engine Speed (rpm) = Alternator Speed (rpm) Alternator pulley drive diameter (mm) Target Alternator Speeds Model Engine Speed (rpm) Alternator Speed (rpm) ASX-2XX, -3XX Special Notes Fixed 5000-7000 Variable Low idle 3500-8000 2000-2500 Fixed 4000-6000 Variable Low idle 3000-7000 2000-2500 a. The cable entry point exceeds 70 C under rated conditions, therefore, in accordance with IEC/EN60079-0 Clause 16.6, suitably rated cable shall be selected for installation. b. The output voltage from the alternator is controlled by an internal regulator. It is recommended however that over voltage protection is fitted to any circuit supplied by the alternator in which one or more components could become a potential source of ignition should over voltage occur. c. To maintain full compliance with hazardous area and EMC requirements ensure: 1. The external earthing point of the alternator and any armored/screened cable are properly bonded to the engine/engine frame. 2. Any connected electrical equipment is engineered to the requisite standard. page 3
Special Notes - continued Flameproof Alternators d. The alternators must not be connected to any process temperatures which exceed the T Class (135 C), ambient temperatures must be observed. e. The cooling fan shall be suitably enclosed with a fan hood capable of resistance to impact in accordance with 17.1.3.3 of IEC/EN60079-0. f. Dust applications - parts of the enclosure may be non-conducting and may generate an ignition - capable level of electro static charge under certain extreme conditions. The user should 17.80 17.80 ensure that the equipment is not installed in a location where it may be subjected to external M16 M16 THREAD THREAD conditions (such as high pressure steam), which might cause a build up of electrostatic charge on non-conducting surfaces. (KEY) 4.00 8.00 (KEY) 4.00 8.00 Dimensions ASX-200, ASX-300, ASX-310 125.50 125.50 R11.25 R11.25 32.50 32.50 85.50 85.50 188.00 188.00 ENSURE PULLEY ENSURE IS DESIGNED PULLEY IS DESIGNED SO THAT ON TIGHTENING SO THAT ON THE TIGHTENING THE NUT, THE PULLEY NUT, CLAMPS THE PULLEY THE CLAMPS THE FAN PLATE & FAN PLATE IN POSITION. & FAN IN POSITION. 10.00 10.00 (KEY HEIGHT) (KEY HEIGHT) Ø17.00 (SHAFT) Ø17.00 (SHAFT) 94.00 94.00 2.80 2.80 Ø163.00 Ø163.00 Ø10.50 Ø10.50 ASX-400 ASX-401 page 4
Americas Asia Pacific Europe, Middle East and Africa AMOT - USA Tel +1 (281) 940 1800 Fax +1 (713) 559 9419 sales@amot.com Roda Deaco - Canada Tel +1 (780) 465 4429 Fax +1 (780) 469 6275 info@rodadeaco.com AMOT - China Tel +86 21 6279 7700 Fax +86 21 5237 8560 shanghai@amot.com AMOT - Singapore Tel +65 6408 6265 Fax +65 6293 3307 singapore@amot.com AMOT - England Tel +44 (0) 1284 762222 Fax +44 (0) 1284 760256 info@amot.com AMOT - Germany Tel +49 (0) 40 8537 1298 Fax +49 (0) 40 8537 1331 germany@amot.com www.chalwyn.com Chalwyn s quality management system is approved by LRQA. page 5