The TPM range of capacitors utilise a mixed dielectic material that consists of polyester or polyropylene film and capacitor tissue. They are impregnated and filled with a mineral oil. The container is a Synthetic Resin Bonded Paper tube sealed at both ends with resin assuring hermetic sealing. The capacitors are terminated with M5 x 12mm studs or tinned copper wire.
NOTE: The impregnant used is a non toxic highly purified and inhibited mineral oil.
APPLICATIONS:The TPM range is specifically designed for high voltage power supplies, general purpose bypass, coupling, filter applications, electrostatic air cleaners, X-ray power supplies and traction.
Capacitance Range: 0.0005µF – 2µF. The tolerance is +/-10%. Other tolerances are available on request. Nominal values measured at 1kHz.
Temperature Range: -55ºC to 85ºC. The nominal voltage rating is applicable from -55ºC to 85ºC.
Temperature Coefficient: Capacitance will increase by 2% per 100ºC temperature rise.
Voltage Range: 1kV – 100kVDC.
Fig 1 Ripple: The sum of the peak ripple voltage and the DC voltage should not exceed the rated voltage. Refer to graph fig 1 for permissible peak-to-peak ripple voltage as a percentage of rated voltage for various frequencies.
Test Voltage: V Test For DC rating <20kV: V Test = 2.0 x Rated Voltage for 1 minute. For DC rating ≥20kV: V Test = 1.5 x Rated Voltage for 1 minute.
|Fig 2.Power Factor: Variable; function of temperature and frequency see fig 2.Nominal value <0.5% at 20°C.|
|Fig 3Dieletric Resistance: (Parallel resistance) Indicated by the graph of Insulance (Mohms x µF) vs Temperature (fig 3). The insulance (Mohms x µF) is nominally 10000s at +20ºC. (Measurements taken after 1 minute with an applied voltage of 500V)|
|Fig 4Life expectancy: TPM type capacitors are designed for a life expectancy of 50000 hours at 65ºC. To achieve the same life expectancy at 85ºC derate to 60% of rated voltage (fig 4).|
DIMENSIONS IN MILLIMETRES +/- 1mm
Max. Torque on terminals = 2Nm
Custom designed capacitors are available to meet your specific application. Please complete and return our :- CAPACITOR APPLICATION QUESTIONNAIRE.
Examples From Product List – Details of other values on request.