Maydown Industrial Estate, Derry
N. Ireland BT47 6UQ
Tel: +44-(0)2871-860265 Fax: +44-(0)2871-860479
Email: sales@hivoltcapacitors.com
          info@hivoltcapacitors.com

The PPR range of capacitors are manufactured using a mixed dielectric material that consists of polyester/polypropylene film and capacitor tissue. They are impregnated and filled with a mineral oil. The container is a robust rectangular Polypropylene case. The internal construction is designed to prevent movement when the capacitor is subjected to mechanical shock or vibration. An inert welding process ensures hermetic sealing. Standard terminations are M10 threaded inserts which eliminates the necessity for large voltage terminals. The case has an extremely low affinity for moisture and is resistant to virtually all electrical environments. Brackets can be welded on as required.

Note: The impregnant used is a non toxic highly refined, purified and inhibited mineral oil.

Applications: The PPR range is designed specifically for DC applications such as filters, bypass, coupling, rapid discharge, pulse forming networks and high voltage power supplies such as those found in radar, laser and X-ray equipment. They are particularly suited for use in portable equipment.

Capacitance Range: 0.002µF - 100µF. The tolerance is +/-10%. Other tolerances are available on request. Nominal values measured at 1kHz.

Temperature Range: -40°C to 85°C. The nominal voltage rating is applicable from -55°C to 85°C. Derating is required for higher operating temperatures.

Temperature Coefficient: Capacitance will increase by 2% per 100°C temperature change.

Voltage Range: 1kVDC - 300kVDC

 

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 20ºC.

 

Fig 3

Dieletric 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 4

Life expectancy: PPR type capacitors are designed for a life expectancy of 50000 hours at 65ºC. To achieve the same life expectancy at 85ºC derate 60% of rated voltage (fig 4).

 

 

 

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.

PART No. Cap µF DC Kilo-Volts A
 		B C
PPR150-104 0.1 15 75 75 142
PPR200-504 0.5 20 100 130 200
PPR300-504 0.5 30 130 220 185
PPR320-104 0.1 32 110 110 180
PPR350-104 0.1 35 90 100 190
PPR350-204 0.2 35 110 120 218
PPR350-504 0.5 35 110 130 440
PPR400-304 0.3 40 110 150 320
PPR450-254 0.25 45 100 130 380
PPR500-103 0.01 50 70 90 245
PPR500-104 0.1 50 115 130 275
PPR500-504 0.5 50 175 235 280
PPR600-403 0.04 60 90 100 235
PPR650-104 0.1 65 110 120 318
PPR750-503 0.05 75 80 110 365
PPR750-104 0.1 75 115 130 365
PPR750-254 0.25 75 175 190 365
PPR1000-253 0.025 100 80 90 420
PPR1000-403 0.04 100 120 200 285
PPR1000-104 0.1 100 125 175 445
PPR1500-103 0.01 150 90 100 340
PPR1500-203 0.02 150 90 100 560
PPR2000-502 0.005 200 90 90 385
PPR3000-252 0.0025 300 70 95 555

DIMENSIONS IN MILLIMETRES +/- 1mm