PMR Range

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PMR Range

The PMR range are in the form of a rolled-seam tinplate can that is hermetically sealed. External connections are via ceramic bushings with threaded studs or solder tags.

Specifications

The PMR range are impregnated and filled with a mineral oil. The container is a rolled-seamed tin plate case that is hermetically sealed. The internal construction is designed to prevent movement when the capacitor is subjected to mechanical shock or vibration. External connections are via ceramic terminals with threaded studs or solder tags. Capacitor are supplied with clip-on brackets. Other brackets are available on request. These capacitors can be mounted in any postion. The finish is a coat of high build light grey weatherwork cellulose enamel paint (other colours available on request).?

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

APPLICATIONS

The PMR Range of capacitors is specifically designed for DC apllications such as filters, bypass and coupling of low frequency audio. Other apllications include:

  • Pulse forming networks
  • Oscillator Circuits
  • Energy Storage
  • Arc and Spark Suppression
  • Integrating Circuits
  • High Voltage Smoothing

Other Information

Capacitors required for A.C. applications and High Discharge rates can also be designed from the PMR range. Consult Hivolt Capacitors Limited for your specific requirements.

Capacitance Range: 0.01μF – 100μF. The tolerance is +/-10%. Other tolerances are available on request. Nominal values measured at 1kHz.

Temperature Range: -55°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: 200Vdc – 40kVdc

RIPPLE:

RIPPLE.png

Ripple: The sum of the peak ripple voltage and the DC voltage should not exceed the rated voltage. The graph above shows permissible peak-to-peak ripple voltage as a percentage of rated voltage for various frequencies.

TEST VOLTAGE: V TEST

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.
Case to terminal Test voltage = V Test + 1kV

Power Factor

power v temp 04.jpg

Power Factor: Variable; function of temperature and frequency. See fig 2. Nominal value < 0.5% at 20oC.

Dieletric Resistance

insulance temp03.jpg

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).

Life expectancy

life 03.jpg

Life expectancy: PMR 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.

Weight: The approximate weight in kg of capacitors in the PMR range can be estimated by multiplying the volume of the capacitor container (in cubic mm) by 1.45 x 10-6

Flashover

V Rated < 5kV, the terminals will withstand 125% of rated voltage without flashover @ 85mm Hg (equivalent to 50000 ft altitude).

V Rated > 5kV, the terminals will withstand 125% of rated voltage without flashover @ 500mm Hg (equivalent to 10000 ft altitude).

Dimensions

SELECT WORKING VOLTAGE:

Part Number CAP uF A B C D E
PMR15-104 0.1 60 48 28 20 20
PMR15-504 0.5 60 48 28 20 20
PMR15-205 2 75 54 48 22 35
PMR15-805 8 95 85 67 40 35
PMR15-126 12 135 85 67 40 35
PMR15-256 25 115 130 100 50 35
PMR15-506 50 180 130 100 50 35
Part Number CAP uF A B C D E
PMR10-104 0.1 50 48 28 20 20
PMR10-504 0.5 50 48 28 20 20
PMR10-105 1 75 48 28 20 20
PMR10-405 4 75 60 54 25 35
PMR10-106 10 115 80 48 40 35
PMR10-256 25 115 85 67 40 35
PMR10-506 50 115 130 100 50 35
Part Number CAP uF A B C D E
PMR20-104 0.1 60 48 28 20 20
PMR20-504 0.5 60 48 28 20 20
PMR20-205 2 75 54 48 22 35
PMR20-605 6 135 60 54 25 35
PMR20-126 12 135 85 67 40 35
PMR20-206 20 115 130 100 50 35
Part Number CAP uF A B C D E
PMR30-104 0.1 60 48 28 20 20
PMR30-504 0.5 75 48 28 20 20
PMR30-105 1 115 48 28 20 20
PMR30-405 4 155 60 54 25 35
PMR30-106 10 95 130 100 50 35
PMR30-256 25 180 130 100 50 35
Part Number CAP uF A B C D E
PMR 60-1040.1655448*35
PMR 60-5040.510080484035
PMR 60-20521001301005035
PMR 60-60561801301005035
PMR 60-106102901301005035
PMR 60-2062018022016412560
Part Number CAP uF A B C D E
PMR 80-5030.05586054*60
PMR 80-2540.25856054*60
PMR 80-105112085674060
PMR 80-40542001301005060
PMR 80-80583451301005060
PMR 80-156152801801807560
Part Number CAP uF A B C D E
PMR 100-5030.055880484060
PMR 100-5040.514080484060
PMR 100-105116085674060
PMR 100-20521401301005060
PMR 100-60563501301005060
PMR 100-156153501801807560
Part Number CAP uF A B C D E
PMR 120-5030.057585674060
PMR 120-1040.110085674060
PMR 120-2540.2510585674060
PMR 120-10511451301007560
PMR 120-20522401301007560
PMR 120-40542801901207560
Part Number CAP uF A B C D E
PMR 150-1030.01606054*60
PMR 150-5030.05856054*60
PMR 150-2540.2512585674060
PMR 150-5040.519085674060
PMR 150-10511601301007560
PMR 150-20521901591217560
Part Number CAP uF A B C D E
PMR 200-1030.01708048*60
PMR 200-1040.110585674060
PMR 200-2540.2519085674060
PMR 200-5040.51601301007560
PMR 200-10513001301007560
PMR 200-4054305240180100100
Part Number CAP uF A B C D E
PMR 250-5030.051108567*70
PMR 250-104X0.1951301006570
PMR 250-2540.251301301006570
PMR 250-5040.52501301006570
Part Number CAP uF A B C D E
PMR 300-3030.031208567*70
PMR 300-1040.12008567*70
PMR 300-104X0.11201301006570
PMR 300-5040.53101301006570
PMR 300-105129518018075100
Part Number CAP uF A B C D E
PMR 400-3030.031608567*70
PMR 400-5030.052108567*70
PMR 400-503X0.051251301006570

NOTES:

Capacitors below with 20mm high terminals have solder tag connections instead of M6 terminal screws

Custom designed capacitors are available to meet your specific application.

These capacitors are fitted with one high voltage terminal and one earth terminal.
An additional terminal for connection to case (earth-terminal) is available as an optional extra. Add suffix M to Part Number.
Note: Non standard size containers can be supplied on request

Flashover:V Rated < 5kV, the terminals will withstand 125% of rated voltage without flashover @ 85mm Hg (equivalent to 50000 ft altitude).V Rated > 5kV, the terminals will withstand 125% of rated voltage without flashover @ 500mm Hg (equivalent to 10000 ft altitude).



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