capacitors for motor applications - elcomp.net

1 1 CAPACITORSCAPACITORSCAPACITORSCAPACITORS CAPACITORSFOR motor APPLICATIONSCAPACITORSEMI and RFI FILTERSCOMPANY 1. MKP - GENERAL General Application Typical dielectrics Ordering 5 2. MKP capacitors for motor run 6- applicatoin 6- technical 73. MKP capacitors IN PLASTIC Design and available Summary tables - series and 94. MKP capacitors IN ALUMINIUM Desigh and available . 1 Summary tables - series and . 1 15. MKP capacitors FOR motor SRART MKP-TLS capacitors with starting device for asynchronous.

2 1 MKP-TLR capacitors with starting-regulative devicefor asynchronous Summary tables - series and 14II. 1 ALUMINIUM ELECTROLYTIC capacitors - AC motor START EAS motor START capacitors ..15 EAS-TLS capacitors with starting device for asynchronous motors ..19 MKP capacitors FOR motor APPLICATIONS3 MKP capacitors FOR motor APPLICATIONSGENERAL INFORMATIONELECTRICAL SPECIFICATIONS AND DEFINITIONS - Dielectric: bi-axially oriented polypropylene - Plates: self-healing metal layer Zn or Al deposited byevaporation under vacuumRated voltage URThe rms value of the sinusoidal AC voltage which canbe applied to the capacitor in normal w rking 250 to 500 V (see each series)Rated current IRThe value of the current flowing through the capacitorof rated capacitance at the rated voltage and frequency rangeThe capacitors can be used at a frequency range of 50-60 Hz.

3 Use at higher frequencies is possible providedthe voltage, current, temperature and power limits arecomplied temperature classMinimum temperature - 25 temperature +70 0C or +85 accordance with the reference standards, thesetemperatures are those measured on the surface of temperature -10 0C .. +85 0 CCapacitance toleranceRated tolerance 5%; 10%Different tolerance values are available on factor (tgddddd)The value of the tangent of the loss factor measured at50 Hz, 20 0C at the rated voltage is:tgddddd 20 x 10 -4 Maximum permissible overloadsThe capacitors can operate in the following overloadconditions throughout the temperature class range.

4 I max = IRU max = URThe overload deriving from the simultaneous presenceof voltage and current above the rated values, even ifwithin the stated limits, must be such that the app rentpower Pa (Irms x Vrms) absorbed by the capacitor is:Pa x 2pppppf x C x UR2 Pulsed stressThe capacitors are capable of withstanding steepwavefronts with a maximum voltage variationspeed of 20 classes and climatic categories IEC/EN 60252 Operating classes of capacitors for single phase motorsare identified as follows:a) Life hclass Aclass Bclass Cclass D3%3%3%3%failure %maxb) Climatic category258521min.

5 Permissibletemperaturemax. permissibletemperaturedamp heatdaysc) Class of safety protectionP0 Without safety protectionP1 Safety achievable by external means (fuse)P2 With internal safety protectionMarkingsBlack colour. Data shown: CONIS trade mark, Seriesnumber, Capacitance in microfarad, Tolerance in %, Voltage, Operating temperature range in degreesCentigrade, Coded climatic class and reliability dataaccording to DIN 40040, Self-Healing property SH, Yearand mounth of resistance between terminals and caseMeasured at 500 VDC.

6 20 0C after 30 > 1000 MohmDirect current operationThese capacitors can be used with a DC voltage notexceeding the peak value of the rated voltageVDC 42 VnMECHANICAL SPECIFICATIONSM ounting:The capacitors may be provided with stud M8 formounting:The maximun torque is 5 NmVibrations:In accordance with IEC 68-2-6 standards, the capacitorspass the test with a frequency range from 10 to 55 Hz,acceleration amplitude 10 g and duration 6 capacitors FOR motor APPLICATIONSCHARACTERISTIC CURVEST [0C]0 25 50 75 100105104103102101 MWWWWWx FTime constant vs.

7 TemperatureCapacitance vs. frequencyCapacitance vs. temperature at 1 kHzDissipation factor vs. frequencyDissipation factor at 1kHztg ddddd10-4tg ddddd10-45 ORDERING CODEMKPXX X XX XX XX XX XX X XRated voltageVACC apacitance tolerance 5%; 10%Rated capacitance - F Code Resistor 1 without discharge resistor 2 with discharge resistor Code Cap 1 without cap 2 with protective cap Code Resin 1 without resin 2 with resin Code Mounting C without fixing stud D with fixing studCONIS internal code Code Type of case Al Aluminium Pl Plastic Code Identifies the terminalsAPush-wire adaptorOUnipolar

8 Leads1 Soldering tags faston faston cable5 Lateral lead wiresExample of the following code: MKP-Z-Al-1D-222 - 4 F 10% 250 VAC describes a MKP-Z capacitor,aluminium case, soldering tags, fixing stud, discharge resistor, protective cap and resin, 4 mmmmmF 10% 250 VACMKP capacitors FOR motor APPLICATIONS6 motor capacitors are operation capacitors for single-phaseinduction motors with auxiliary winding and three-phase motorin Steinmetz capacitors are permanently connected to the windingsof the motor , so that both motor and capacitor have the samemode of capacitors are self-healing capacitors .

9 A weak pointin the dielectric would become ineffective by itself since themetal coating evaporates at the weak used in this way should be carefully selected asfar as voltage rating is concerned, and special attention shouldbe paid to the method of operation (continuous or intermittent).The voltage developed across the capacitor terminals is,usually, higher than the supply capacitors are utilized mainly in the following fields:Household and domestic appliancesOffice machinesHeating and ventilation techniquesGarden and recreational induction motorsThe single-phase motors has two windings.

10 The mainwinding is supplied directly from the mains, whereas theauxiliary winding supply is provided by the capacitance ofthe series-connected capacitor capacitance is selected so that the auxiliary windingis able to take up the capacitor current continuously. Noswitching devices are necessary for the auxiliary windingcircuit, so that in respect of operating reliability the single-phase capacitor start and run motor is in no way inferior toa three-phase cage rotor motor .