Catalogues - avx-metallized-polyester-film-capacitors

Catalogue AVX Metallized Polyester Film Capacitors

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Metallized Polyester Film Dielectric Condensors

Characteristics

7 - Insulation resistance (IR)

Measurement conditions:

• The opposite table gives the measurement voltages in relation to the nominal voltage of the capacitor, unless otherwise specified.

Requirements:

• The insulation resistance should meet the values shown in the table below at 20°C.


Measuring Points	C_R < 0.33 uF				C_R > 0.33 uF
	IR min (GQ)				IR x C_r min (MQ x uF)
	Performance Class 1		Performance Class 2		Performance Class 1		Performance Class 2
Between Terminals	^VR- < 100 V	^VR- > 100 V	^VR- < 100 V	^VR- > 100 V	^VR- < 100 V	^VR- > 100 V	^VR- < 100 V	^VR- > 100 V
Between Terminals	15	30	3.75	7.5	5,000	10,000	1,250	2,500
Between Terminals and Ground	> 30,000 MQ

typical curve

insulation resistance vs. temperature IR = f (T) °C.

IR (MQ X n F)

8 - Voltage gradient (dv/dt)_R

• Pulses under V_R

Example:

0.9 V

10⁴

10³

10²

T (°C)

0.1 V

- 50

+ 50

+ 100

(dv/dt)_R = Q.8 V_R/t₂ - t,

• Pulses under V_Amaximum voltage gradients of the capacitor under V_A:

V_R

(dv/dt) =—x (dv/dt)

^Amax Va Rmax

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