MS/MD Series RoHS 60/70°C Compliant •Intermittent AC Motor Starting • 6.3 mm Double amp tags (quick connect types) •VDE approved to EN 60252-2 application Basic design A range of aluminium electrolytic capacitors specifically designed for a.c. operation which help to start the motor by providing a leading current to the auxillary winding. The capacitor is not permanently connected to the winding of the motor and is switched off after starting, usually automatically. Capacitors for this application are designed for �������������������������������������� itermittent duty only, and capable of withstanding the a.c. voltage applied to the motor during starting. The capacitor construction comprise either double anode or O-style (double anode and floating cathode) windings and are housed in a moulded plastic case. The MD series is VDE approved to EN 60252-2 for the defined ratings. Specification Standards Capacitance range Capacitance tolerance Rated voltage UR Surge voltage US Endurance life time +70°C, 1.1UR DIN EN 60252-2:- AC Motor Capacitors - Part 2 : Motor Start Capacitors 25 µF to 750µF ±10% or -0% +25% 120V - 330Vac 50Hz 1.25 x UR +60°C, 1.1UR MS types 500 hrs (at specified duty cycle) MD types 500 hrs (at specified duty cycle) End of Life requirement: ∆C/C < ±10% cos ϕ < 0.2 Shelf Life Temperature range 2 years -20°C to +70°C MD types -20°C to +60°C MS types Dimensions mm Case Code D1 ±0.5 AA AB AC D2 ±0.5 38 38 38 39 39 39 Lmax 75 90 116 VDE Approvals to EN 60252-2 Rated Voltage 220V 260V Capacitor typeMDMD Capacitance (µF) 30 40 50 60 70 80 90 100 120 125 (note 1) AA AA AB AA AB AA AB AB AB AC AC AC AC AC (note 2) AB AB AB AB AB Note 1: Duty cycles approved; 220V @ SD=3 & ED=1.7% 280V @ SD=1 & ED=0.55% 300V @ SD=1 & ED=0.1% Note 2: Duty cycles approved; 260V @ SD=3 & ED=1.7% 330V @ SD=1 & ED=0.55% General approval notes; • valid for both ±10% and -0 +25% tolerance. • valid for intermediate capacitance values in increments of 1µF between 30µF and 100µF and in increments of 5µF between 100µF and 125µF. MS / MD Motor Starting Capacitors 120Vac Type numberMin. Cap.Max. Cap.ToleranceCan Size (µF) (µF) (mm) ---MS12AAMA1STD ---MS12AAMK1STD ---MS12ABMA1STD ---MS12ABMK1STD ---MS12ACMA1STD ---MS12ACMK1STD ---MD12AAMA1STD ---MD12AAMK1STD ---MD12ABMA1STD ---MD12ABMK1STD ---MD12ACMA1STD ---MD12ACMK1STD 25 25 85 90 120 130 25 25 85 90 120 130 325 360 460 510 670 750 325 360 460 510 670 750 -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% 38x75 38x75 38x90 38x90 38x116 38x116 38x75 38x75 38x90 38x90 38x116 38x116 Duty Cycle @ 120V rms @ 150V rms 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 0.55% 0.55% 0.55% 0.55% 0.55% 0.55% 220Vac Type numberMin. Cap.Max. Cap.ToleranceCan Size ---MS22AAMA1STD ---MS22AAMK1STD ---MS22ABMA1STD ---MS22ABMK1STD ---MS22ACMA1STD ---MS22ACMK1STD ---MD22AAMA1STD ---MD22AAMK1STD ---MD22ABMA1STD ---MD22ABMK1STD ---MD22ACMA1STD ---MD22ACMK1STD (µF) 30 30 40 40 55 65 30 30 40 40 55 65 (µF) 65 70 90 100 130 150 65 70 90 100 130 130 (mm) -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% 38x75 38x75 38x90 38x90 38x116 38x116 38x75 38x75 38x90 38x90 38x116 38x116 Duty Cycle @ 220V rms @ 280V rms 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 0.55% 0.55% 0.55% 0.55% 0.55% 0.55% 260Vac Type numberMin. Cap.Max. Cap.ToleranceCan Size (µF) (µF) (mm) ---MS26AAMA1STD ---MS26AAMK1STD ---MS26ABMA1STD ---MS26ABMK1STD ---MS26ACMA1STD ---MS26ACMK1STD ---MD26AAMA1STD ---MD26AAMK1STD ---MD26ABMA1STD ---MD26ABMK1STD ---MD26ACMA1STD ---MD26ACMK1STD * 25 25 35 35 50 55 25 25 30 35 45 50 55 60 75 85 110 125 50 55 70 80 100 115 -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% -0% +25% ±10% 38x75 38x75 38x90 38x90 38x116 38x116 38x75 38x75 38x90 38x90 38x116 38x116 Duty Cycle @ 260V rms @ 330V rms 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 1.67% 0.55% 0.55% 0.55% 0.55% 0.55% 0.55% Capacitance code e.g. 030=30µF, 120=120µF technical data Dual Voltage Rating The MD range of capacitors is designed with a dual voltage rating. The lower voltage rating relates to a duty cycle of 1.67% and the upper voltage rating relates to a duty cycle of 0.55%. Power Factor The tangent of the loss angle for motor start capacitors shall not exceed 0.1 and shall be calculated as follows: Tan δ = W = true watts VxI apparent watts Duty Cycle The standard rating is 1.67% or 1/60th full time and corresponds to a maximum duty of 20 starts, each of three seconds duration per hour. It is expressed as 3/1.67 (a 3 minute cycle with 1.67% duration during which the capacitor may be energised). If the same capacitor is to be used for a duty cycle of 60 starts per hour the cycle duration will be 1 minute. The operation time per cycle will then have to be reduced to 1.67% of 1 minute (i.e. 1 second). Alternative duty cycles are available on request. Presence of Run Capacitor When the motor is fitted with both starting and run capacitors, consideration should be given to fitting of the appropriate discharge resistor to the starting capacitor. This is to protect the run capacitor from damage through discharge of the starting capacitor. Container Form Cylindrical mouldings, meeting creepage and clearance distances, according to IEC 60335-1 and flammability ratings according to UL94-V1. BHC and Evox Rifa Electrolytic Capacitors 147 MS / MD Motor Starting Capacitors technical data Discharge Resistors A discharge resistor may be fitted to a motor start capacitor to prevent electrical overstress of the capacitor and or for safety reasons. In accordance with BS5267 and IEC 60252, the resistor value should be such that it reduces the voltage on the capacitor, from the line voltage to less than 50V within 60 secs. The resistor value may be approximated as follows: Rated Voltage (d.c.) T Value (kOhms) Wattage 120 50000 5.6 2W 220 32000 15 2W 260 30000 33 0.5W 280 28000 56 1W 330 26000 82 2W 100 1W T R (kΩ) max. = Rated capacitance µF part numbering Pos 1–15 0 8 0MS 2 2ABMA 1STD 1 2 3 6 7 12 4 5 080MS 8 9 10 11 22ABMA 13 14 15 1STD Variants, Pos. 13-15 STD=standard design, all other codes are customer specific. mOTOR START Terminal Code, Pos. 12 1 = Double amp tag 2 = special variant Capacitance Tolerance, Pos. 11 A = -0% +25%, K = ±10% Manufacturing style, Pos. 10 M = Moulded case Case code, Pos. 8-9 AA = 38x75, AB = 38x90, AC = 38 x 116 Rated Voltage (rms), Pos. 6-7 12 = 120Vac, 22 = 220Vac, 26 = 260Vac Type code, Pos. 4-5 MS = Motor start single rating MD = Motor start dual rating Capacitance code, Pos. 1-3 080 = 80µF, 120 = 120µF Statements of suitability for certain applications are based on our knowledge of typical operating conditions for such applications, but are not intended to constitute – and we specifically disclaim – any warranty concerning suitability for a specific customer application or use. 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