F1778X2
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Vishay Roederstein
Revision: 17-Jan-17
11
Document Number: 27610
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SUB GROUP C2
4.12.3 Final measurements Tangent of loss angle Increase of tan :
0.008 for: C 1 µF or
0.005 for: C > 1 µF
Compared to values measured in 4.12.1.
Voltage proof
1350 V
DC
; 1 min between terminations
No permanent breakdown or flash-over
Insulation resistance 50 % of values specified in section
“Insulation Resistance” of this specification
SUB-GROUP C3
4.13.1 Initial measurements Capacitance
Tangent of loss angle:
for C 1 µF at 10 kHz
for C > 1 µF at 1 kHz
4.13 Impulse voltage 3 successive impulses, full wave, peak
voltage:
X2: 2.5 kV for C 1 µF
X2: 2.5 kV/C for C > 1 µF
Max. 24 pulses
No self healing, breakdowns or flash-over
4.14 Endurance Duration: 1000 h
1.25 x U
RAC
at 110 °C
Once in every hour the voltage is increased
to 1000 V
RMS
for 0.1 s via resistor of
47 ± 5 %
4.14.7 Final measurements Visual examination No visible damage
Legible marking
Capacitance |C/C| 10 % compared to values measured
in 4.13.1.
Tangent of loss angle Increase of tan :
0.008 for: C 1 µF or
0.005 for: C > 1 µF
Compared to values measured in 4.13.1.
Voltage proof
1350 V
DC
; 1 min between terminations
2120 V
AC
; 1 min between terminations
and case
No permanent breakdown or flash-over
Insulation resistance 50 % of values specified in section
“Insulation Resistance” of this specification
SUB-GROUP C4
4.15 Charge and discharge 10 000 cycles
Charged to 435 V
DC
Discharge resistance:
4.15.1 Initial measurements Capacitance
Tangent of loss angle:
for C 1 µF at 10 kHz
for C > 1 µF at 1 kHz
4.15.3 Final measurements Capacitance |C/C| 10 % compared to values measured
in 4.15.1.
Tangent of loss angle Increase of tan :
0.008 for: C 1 µF or
0.005 for: C > 1 µF
Compared to values measured in 4.15.1.
Insulation resistance 50 % of values specified in section
“Insulation Resistance” of this specification
GROUP C INSPECTION REQUIREMENTS
SUB-CLAUSE NUMBER AND TEST CONDITIONS PERFORMANCE REQUIREMENTS
R
435 V
DC
1.25 x C dU/dt
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=
