C&H Technology ET User Manual

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ET

Vishay ESTA

Document Number: 13014
Revision 04-Jan-02

www.vishay.com

3

TYPE ET

These 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 Synthetic
Resin Bonded Paper tube sealed at both ends with
resin assuring hermetic sealing. The capacitors are
terminated with M5 *12mm studs or tinned copper wire.
Note: The impregnant used is a non toxic highly refined,
purified and inhibited mineral oil.

APPLICATIONS

The ET range is specifically designed for high voltage
filters and can be successfully used in the following
applications:

• By-pass

• Coupling

• Filter applications

• X-ray power supplies

• Electrostatic air deaners

TEMPERATURE RANGE

Temperature range is – 55°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

0.0005µF - 2µF. The tolerance is ± 10%. Other
tolerances are available on request. Nominal values
measured at 1kHz.

VOLTAGE RANGE

1000VDC - 70kVDC

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

DC Filter Capacitors

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.

DIELECTRIC RESISTANCE

(Parallel resistance) is indicated by the graph of insulance
(MΩ x µF) vs temperature fig.3. The insulance (MΩ x µF)
is nominally 10000s at + 20°C. (Measurements taken
after 1 minute with an applied voltage of 500V)

LIFE EXPECTANCY

ET type capacitors are designed for a life exceptancy of
5000h at 65 °C. To achieve the same life expectancy at
85°C derate to 60% of rated voltage fig.4.

WEIGHT

The approximate weight in grams may be calculated by
multiplying the volume of the capacitor container by 1.2 x

10-3.

FIG 1

FIG 2

FIG 3

FIG 4

30

20

E
L
P
P

I
R

%

10

0

10 100 1000

Hz

10000

at 20°C

POWER FACTOR

vs

TEMPERATURE

2%

50H

1kH

z

z

- 20

040

65

80°C

1%

0%

D
F

M

4

10

x
S

M
H

3

O

10

G

INSULANCE VS TEMPERATURE

E
M

10

2

TYPICAL VALUES

- 40

040

80°C

S
R
U
O

5

H

10

4

10

3

10

50

150°

100

RATED VOLTAGE