080MD22ABMK1STD - Evox Rifa

Motor Start

Capacitors

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

MS/MD Series

A range of aluminium electrolytic capacitors specifically designs 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 intermittent duty only, and must be capable

of withstanding the a.c. voltage applied to the motor during starting. This range of

capacitors is housed in a moulded case and carry approvals to VDE 560-8 and comply with

the requirements of BS 5267 and IEC 252. The MS series is rated at a single voltage

whereas the MD has a dual voltage rating.

APPROVAL CERTIFICATE DETAILS

Capacitance range ……….. See Motor Start Approval Status Table

Capacitance tolerance …… ±10% or –0 to +25%

Rated voltage ……………. MS – 120, 220 and 260V a.c.

MD – 120/150, 220/280 and 260/330 V a.c.

Surge voltage ……………. 1.25 x rated voltage

Climatic category ………… 20/60/21 20/70/21

Temperature range ……….. -20°C to +60°C -20°C to +70°C

MS MD

120 -

220 220/280

260 260/330

MS and MD

89732

79124

79125

Voltage VDE Approval No.

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

DIMENSIONS mm

ACCESSORIES

The following accessories are also available,

Leads, Discharge resistors, End Caps, Clamps.

L(max) D2

Case Code D1 ±0.5 (mm) D2 ±0.5

(mm) Lmax

(mm)

AA 38 39 75

AB 38 39 90

AC 38 39 116

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

TECHNICAL DATA

Capacitance

Motor start capacitors are tested as recommended in BS5267 - ‘Capacitance shall be

determined by measuring the current through the capacitor at the rated voltage and

frequency of the capacitor:’

The current should be read within 3 seconds after energising.’

Capacitance µF at 50Hz = 3180 x I

Where: I=current in amperes and V=applied voltage in volts

Voltage Rating (a.c.)

Due to the presence of the auxiliary start winding, the voltage appearing on the motor start

capacitor is usually higher than that of the motor or line voltage. The voltage generally rises

with the speed of the motor and varies with the motor load during start-up. Unloaded

conditions can give voltages of 15% more than that of loaded.

It is essential that the capacitor is disconnected before the voltage exceeds its maximum

voltage rating.

Dual Voltage Rating

The MD range of BHC Components 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

V x I apparent watts

Rated

Voltage

(rms)

Maximum Cut-

Off Voltage

(rms)

120 150

220 275

260 325

280 350

330 413

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

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 following BS5267: 1967

and IEC 252 1975, 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. Most popular are 0.55% and 1%.

Presence of a 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 335-1

and flammability ratings according to UL94-V1.

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 IEC252, 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:

R (kΩ) max. = T

Rated capacitance µF

Rated Voltage

(dc) T

120 50000

220 32000

260 30000

280 28000

330 26000

Standard Resistor Values

Value (Ohms) Wattage

5.6K 2W

15K 2W

33K 0.5W

56K 1W

82K 2W

100K 1W

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

Shelf Life

Capacitors may be stored for periods up to 2 years without detriment, but after long periods

it is a safeguard to test them before putting them into service. In service, the oxide film,

which is the dielectric of the capacitor, is maintained in good condition because any

imperfections permit a current to pass and the resulting electrolysis forms a new oxide layer.

Deterioration of the film takes place if the capacitor is stored for long periods and it is

preferable for the ‘reforming’ of the film to be brought about before the capacitor is subject

to its full duty. If a motor start capacitor is already connected to the motor, the reforming

can be achieved by freeing the motor from its load and switching on several times.

Part Numbering:

Capacitor Marking

The capacitors are marked with all the items from the following list as a minimum.

1. Rated capacitance in µF

2. Rated voltage a.c.

3. Duty cycle

4. Frequency

5. Temperature range

6. Date code

7. BHC Components part number

8. Climatic category

9. Approvals

080

STD

MS Series

MD Seris

Capacitance Variants

080=80µF STD = standard design, all other

codes used to identify customer

and / or special requirements

Type Terminal Code

MS = Motor start single rating 1 = Double amp tag

MD = Motor start dual rating 2 = Special variant

Voltage Capacitance Tolerance

22 = 220V RMS (rated) A = -0% +25%, K = ±10%

Case Size Manufacturing Style

(code) M = Moulded case

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

Capacitance Ranges

Series MIN CAP MAX CAP Tolerance Can Size

120V (µF) (µF) (mm)

@ 120V rms (Surge

Voltage=150V) @ 150V rms

(Surge Voltage=188V)

MS12AAMA1STD 25 325 -0% +25% 38x75 1.67%

MS12AAMK1STD 25 360 ±10% 38x75 1.67%

MS12ABMA1STD 85 460 -0% +25% 38x90 1.67%

MS12ABMK1STD 90 510 ±10% 38x90 1.67%

MS12ACMA1STD 120 670 -0% +25% 38x116 1.67%

MS12ACMK1STD 130 750 ±10% 38x116 1.67%

MD12AAMA1STD 25 325 -0% +25% 38x75 1.67% 0.55%

MD12AAMK1STD 25 360 ±10% 38x75 1.67% 0.55%

MD12ABMA1STD 85 460 -0% +25% 38x90 1.67% 0.55%

MD12ABMK1STD 90 510 ±10% 38x90 1.67% 0.55%

MD12ACMA1STD 120 670 -0% +25% 38x116 1.67% 0.55%

MD12ACMK1STD

130

750

±10%

38x116

1.67%

0.55%

Duty Cycle

Series MIN CAP MAX CAP Tolerance Can Size

220V (µF) (µF) (mm)

@ 220V rms (Surge

Voltage=275V) @ 280V rms

(Surge Voltage=350V)

MS22AAMA1STD 30 65 -0% +25% 38x75 1.67%

MS22AAMK1STD 30 70 ±10% 38x75 1.67%

MS22ABMA1STD 40 90 -0% +25% 38x90 1.67%

MS22ABMK1STD 40 100 ±10% 38x90 1.67%

MS22ACMA1STD 55 130 -0% +25% 38x116 1.67%

MS22ACMK1STD 65 150 ±10% 38x116 1.67%

MD22AAMA1STD 30 65 -0% +25% 38x75 1.67% 0.55%

MD22AAMK1STD 30 70 ±10% 38x75 1.67% 0.55%

MD22ABMA1STD 40 90 -0% +25% 38x90 1.67% 0.55%

MD22ABMK1STD 40 100 ±10% 38x90 1.67% 0.55%

MD22ACMA1STD 55 130 -0% +25% 38x116 1.67% 0.55%

MD22ACMK1STD

150

±10%

38x116

1.67%

0.55%

Duty Cycle

Series MIN CAP MAX CAP Tolerance Can Size

260V (µF) (µF) (mm) @ 260V rms

(Surge Voltage=325V) @ 330V rms

(Surge Voltage=413V)

MS26AAMA1STD 25 55 -0% +25% 38x75 1.67%

MS26AAMK1STD 25 60 ±10% 38x75 1.67%

MS26ABMA1STD 35 75 -0% +25% 38x90 1.67%

MS26ABMK1STD 35 85 ±10% 38x90 1.67%

MS26ACMA1STD 50 110 -0% +25% 38x116 1.67%

MS26ACMK1STD 55 125 ±10% 38x116 1.67%

MD26AAMA1STD 25 50 -0% +25% 38x75 1.67% 0.55%

MD26AAMK1STD 25 55 ±10% 38x75 1.67% 0.55%

MD26ABMA1STD 30 70 -0% +25% 38x90 1.67% 0.55%

MD26ABMK1STD 35 80 ±10% 38x90 1.67% 0.55%

MD26ACMA1STD 45 100 -0% +25% 38x116 1.67% 0.55%

MD26ACMK1STD

115

±10%

38x116

1.67%

0.55%

Duty Cycle

MS / MD Motor Starting Capacitors

BHC Components Ltd.

20-21 Cumberland Drive, Granby Industrial Estate, Weymouth, Dorset, DT4 9TE. United Kingdom

Tel: +44 1305 782871 Fax: +44 1305 760670 Website: http://www.bhc.co.uk Email:bhcsales@bhc.co.uk

Approval Status

The table above shows the capacitor values that have been approved within the can sizes

shown. Other unapproved capacitor values are available upon request.

RATED VOLTAGE

120

APPROVAL

VDE

CAPACITOR TYPE

CAPACITANCE (uF)

25 AA AA

30 AA AA AA

35 AA AA

40 AA AA,AB AB AA,AB AB

50 AA AA,AB AB AA,AB AB

60 AA AA,AB AB AA,AB AB

70 AB AB AB,AC AB

80 AA AB AB AB,AC AB

90 AB,AC

100 AA AC AB,AC

120 AA

125 AA AC AC

150 AA

160 AA

180 AB

200 AB

230 AB

250 AB

300 AB

310 AC

315 AC

350 AC

400 AC

260V

220V

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