F1772S X2
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Vishay Roederstein
Revision: 13-Mar-15
10
Document Number: 26062
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SUB-GROUP C1
COMBINED SAMPLE OF SPECIMENS
OF SUB-GROUPS C1A AND C1B
4.11.6 Final measurements Visual examination No visible damage
Legible marking
Capacitance |C/C| 5 % of the value measured in 4.11.1.
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 4.11.1.
Voltage proof
1350 V
DC
1 min between term.
No permanent breakdown or flash-over
Insulation resistance 50 % of values specified in section
“Insulation resistance” of this specification
SUB-GROUP C2
4.12 Damp heat steady state 56 days; 40 °C; 90 % to 95 % RH
no load
4.12.1 Initial measurements Capacitance
Tangent of loss angle: 1 kHz
4.12.3 Final measurements Visual examination No visible damage
Legible marking
Capacitance |C/C| 5 % of the value measured in 4.12.1.
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 4.12.1.
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 C2A
4.12A Damp heat steady state
with load
RH: 85 %; Temp.: 85 °C; Load: 240 V
AC
Duration: 1000 h
4.12.1A Initial measurements Capacitance
Tangent of loss angle: 1 kHz
4.12.3A Final measurements Visual examination No visible damage
Legible marking
Capacitance |C/C| 10 % of the value measured in 4.12.1A
Tangent of loss angle Increase of tan : 0.015
Compared to values measured in 4.12.1A
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
GROUP C INSPECTION REQUIREMENTS
SUB-CLAUSE NUMBER AND TEST CONDITIONS PERFORMANCE REQUIREMENTS