BRITISH STANDARD AUTOMOBILE SERIES BS AU 232 1989 ISO 8854 1988 Methods of test and general requirements for road vehicle alternators with regulators BS AU 232 1989 This British Standard, having been[.]
BRITISH STANDARD AUTOMOBILE SERIES Methods of test and general requirements for road vehicle alternators with regulators BS AU 232: 1989 ISO 8854:1988 BS AU 232:1989 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Policy Committee (AUE/- ) to Technical Committee AUE/1 6, upon which the following bodies were represented: Association of Trailer Manufacturers British Cable Makers’ Confederation Department of Transport (Highways) Department of Transport (Transport and Road Research Laboratory) Institution of Electronic and Radio Engineers National Caravan Council Ltd Society of Motor Manufacturers and Traders Ltd This British Standard, having been prepared under the direction of the Automobile Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 29 September 989 © BSI 01 - 2000 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment 86/70262 DC ISBN 580 17431 X Amendments issued since publication Amd No Date of issue Comments BS AU 232:1989 Contents Page Committees responsib le National foreword © BSI 01 - 000 Inside front cover ii Scope and field of application D efinitions Test conditions Test equipment connection diagram Measurement procedure Presentation of results Figure — D iagram for alternator testing Figure — Presentation of results Tab le i BS AU : 989 National fore word This British Standard has been prepared under the direction of the Automobile Road vehicles — Alternators with regulators — Test methods and general requirements”, published by the International Organization for Standardization Standards Policy Committee and is identical with ISO 8854: 988 “ (ISO) A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application C omp liance with a British S tand ard d oe s no t of itse lf confe r immunity from le gal ob ligatio ns S ummary of p age s This document comprises a front cover, an inside front cover, pages i and ii, pages to and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 01 - 2000 BS AU : 989 Scop e and field of application This International Standard specifies test methods and general requirements for the determination of the electrical characteristic data of alternators for road vehicles It applies to alternators, cooled according to the manufacturer’s instructions, mounted on internal combustion engines D efinitions For the purposes of this International Standard, the following definitions apply 2.7 rate d curre nt, IR minimum current, in amperes, which the alternator shall supply at a frequency nR = 000 min–1 and at test voltage Ut 2.8 maximum current, Imax current, in amperes, which the alternator supplies at maximum continuous frequency (as defined by the alternator manufacturer) and at test voltage Ut Test conditions The tests shall be carried out at a room temperature of 23 ± °C wherever possible A temperature deviating from this range shall be recorded specified value, in volts, at which the current The reference point for recording cooling air measurements shall be carried out temperature shall be at cm from the air intake of the alternator nA The direction of alternator rotation shall be as alternator rotational frequency, which is the indicated by the manufacturer number of revolutions divided by time, in minutes to In the measuring a battery and an the power minus one, at which it begins to supply adjustable resistorcircuit, R shunted to the battery are current when frequency is increased for the first used (see Figure and Figure 2) time This depends on pre-exciting power (input), The tests shall be conducted using a fully charged frequency changing velocity, battery voltage and lead-acid battery of the correct nominal voltage residual flux density of the rotor having a nominal capacity of not less than 50 % of the rated current IR, expressed in ampere-hours n0 The overall capability of the test equipment shall alternator rotational frequency, in minutes to the allow parameter measurements within the power minus one, at which it reaches the specified tolerances shown in the Table test voltage Ut without any current output (the point where the current frequency characteristic I = f(n) intersects the abscissa) 2.1 te st voltage , Ut 2.2 cut-in freque ncy, 2.3 ze ro-amp fre que ncy, Table Parame te r Accuracy % Voltage ± 0,3 Current ± 0,5 alternator rotational frequency, in minutes to the Torque ± power minus one, which corresponds approximately Rotational frequency ± to the idling frequency of the engine This rotational –1 frequency is set at 500 for the purpose of All measurements of current shall be carried out by this specification adjusting the load resistor R to maintain a constant test voltage Ut nR The measurements shall be carried out with alternator rotational frequency, in minutes to the integral or separate regulator power minus one, at which it supplies its rated To prevent the regulator working, measurements current IR shall be made at the following test voltages: the rated frequency is specified as nR = 000 min–1 13,5 ± 0,1 V for 12 V systems; 27 ± 0,2 V for 24 V systems 2.4 minimum application fre que ncy, nL 2.5 rated fre quency, 2.6 minimum ap plication current, IL current, in amperes, which is delivered by the alternator at test voltage Ut and at frequency nL = 500 min–1 © BSI 01-2000 Test equipment connection diagram For alternator tests, connections shall be made in accordance with Figure 1 BS AU : 989 The voltmeter shall be connected direct to the alternator power output terminals The connecting cables used shall be adequate for the output of the alternator under test In the case of a separate regulator, their lengths shall be recorded Me asureme nt p roce dure C urre nt/rotatio nal fre que ncy Warm tests characte ristic 5.1 5.1 1 Rotational frequencies and measuring points Current measurement shall be taken at the following rotational frequencies (in minutes to the power minus one); the temperature of the stator shall be allowed to reach equilibrium at each individual frequency before current values are recorded: A-rotational frequency (ë 000) – 500 – 000 – 500 – 000 – 500 – 000 – 000 – 000 – 000 – 12 000 – nmax The current/rotational frequency characteristic is indicated by the following five points: a) Cut-in frequency, nA Increase the alternator rotational frequency until the charge indicator system indicates the commencement of battery charging, and record this frequency The value of charge indicator influences the cut-in frequency and its value shall be agreed between the alternator manufacturer and the vehicle manufacturer b) Zero-amp frequency, n0 (indirect measurement) Reduce the alternator rotational frequency until an alternator output current between % of IR and A, but not less than A, is reached Record frequency and current for graphic determination of the zero-amp frequency: i.e the zero-amp speed is determined by extension of the current/rotational frequency characteristic until the abscissa is intersected This graphic extrapolation shall be made after completing the measurements c) Minimum application current, IL Adjust the alternator rotational frequency to nL = 500 min–1 , and record the alternator output current (defined as being the minimum application current IL) d) Rated current, IR Adjust the alternator rotational frequency to nR = 000 min–1 , and record the alternator output current (defined as being the rated current IR) e) Maximum current, Imax Adjust the alternator rotational frequency to nmax as specified by the alternator manufacturer, and record the alternator output current (defined as being the maximum current Imax) Characteristic of power absorbed (drive power) and efficiency The power absorbed by the alternator shall be calculated at the measuring points shown in If so desired, the efficiency of the alternator may be calculated and recorded 5.1 1 Figure — D iagram for alte rnato r te sting © BSI 01-2000 BS AU : 989 5.1 Short form tests 5.1 2.1 If so desired, further intermediate values may be recorded Short form warm test The test time shall not exceed 30 s with constant The alternator under test shall be warmed up for 30 at 000 min–1 It is however permissible to reduce this time if it can be shown that the variation of frequency Te sting of functional ab ility o f re gulato r temperature which would be reached after 30 The alternator shall be run at rated rotational has been attained in a shorter period The voltage frequency and rated current until the temperature shall be constant and equal to the test voltage Ut during the warm- up and the measuring period of the regulator becomes stable The load shall then be reduced to A and a check made to determine After the warm- up period, the rotational frequency that the voltage does not rise above the alternator shall be reduced until the current is between A voltage specified by the alternator manufacturer and 0, 05 IR Record current and rotational NOTE frequency The setting of the regulator is specific to the vehicle manufacturer Current measurements shall be taken at least at the following rotational frequency values (in minutes to Pre se ntation of re sults Measurements of current/rotational frequency and the power minus one): 500 – 000 – 000 – 000 – 000 – 000 – power absorption characteristics shall be presented 000 – in accordance with Figure nmax If so desired, further intermediate values may be recorded The test time shall not exceed 30 s, with constant variation of frequency 5.1 2.2 The tests described in 5.1.1 and 5.1 will produce different characteristic curves and therefore different maximum current values The manufacturer shall indicate which test method has been used Short form cold test Current measurements shall be taken at least at the following rotational frequency values (in minutes to the power minus one): A- rotational frequency – 500 – 000 – 000 – 000 – 000 – 000 – 000 – © BSI 01 - 2000 n max BS AU 232:1989 Figure — Presentation of results © BSI 01 - 000 blank BS AU 232: 1989 ISO 8854:1988 BSI — British Standards Institution BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level It is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated b y amendment or revis ion Us ers of Britis h S tandards should make s ure that they p oss es s the latest amendments or editions It is the constant aim of BS I to imp rove the quality of our p roducts and services We would b e grateful if anyone finding an inaccuracy or amb iguity while us ing this Britis h S tandard would inform the S 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