document number: 13016 for tec hnical questions, contact: esta@vishay.com www.vishay.com revision: 11-aug-10 1 high voltage dc capacitors epr vishay esta type epr the epr range of capacitors are manufactured using a mixed dielectric material th at consists of polyester /polypropylene film and ca pacitor tissue. they are impregnated and filled with a mi neral oil. the container is a robust rectangular polypro pylene case. the internal construction is designed to prevent movement when the capacitor is subjected to mech anical 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 purified and inhibited mineral oil. applications the epr range is designed specifically for dc applications such as filters: ? by-pass ? coupling ? rapid discharge ? pulse forming networks ?radar ? laser ? x-ray equipment temperature range temperature range is - 40 c to + 85 c. derating is required for operation at higher temperatures. temperature coefficient capacitance will increase by 2 % per 100 c temperature rise. capacitance range 0.002 f to 2 f. the tolerance is 10 %. other tolerance are available on request. normal values measured at 1 khz. 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. fig. 1 power factor the power factor is variable, and is a function of temperature and frequency see fig. 2. nominal value < 0.5 % at 20 c fig. 2 dielectric resistance (parallel resistance) is indica ted by the graph of insulance (m x f) vs temperature fi g. 3. the insulance (m x f) is nominally 10 000 s at + 20 c . (measurements taken after 1 minute with an applied voltage of 500 v) fig. 3 life expectancy epr type capacitors are designed for a life exceptancy of 50 000 h at 65 c. to achieve the same life expectancy at 85 c derate to 60 % of rated voltage fig. 4. fig. 4 30 10 20 10 100 1000 % ripple frequency hz 0 10 000 2 % 0 % 1 % 80 - 20 0 40 65 1 khz 50 hz power factor v s . temperature at 20 c - 40 0 40 80 m x mf 10 2 10 3 10 4 10 5 in s ulance v s . temperature typical value s s
www.vishay.com for technica l questions, contact: esta@vishay.com document number: 13016 2 revision: 11-aug-10 epr vishay esta high voltage dc capacitors voltage range 1000 v dc to 300 000 v dc test voltage terminal/terminal (vt/t) for dc rating < 20 kv vt/t = 2.0 x rated voltage 60 s for dc rating > 20 kv vt/t = 1.5 x rated voltage 60 s dimensions in millimeters a 6 c b type description part number cap. f abc 15 kv dc EPR150-104 0.1 75 75 142 30 kv dc epr300-504 0.5 130 220 185 50 kv dc epr500-103 0.01 70 90 245 epr500-504 0.5 175 235 280 75 kv dc epr750-503 0.05 80 110 365 epr750-104 0.1 115 130 365 epr750-254 0.25 175 190 365 100 kv dc epr1000-253 0.025 80 90 420 epr1000-403 0.04 120 200 285 epr1000-104 0.1 125 175 445 200 kv dc epr2000-502 0.005 90 90 385 300 kv dc epr3000-252 0.0025 70 95 555
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