MKP338 2 X2
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Vishay BCcomponents
Revision: 21-Sep-16
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Document Number: 28119
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SUB-GROUP C1
COMBINED SAMPLE OF
SPECIMENS OF SUB-GROUPS
C1A AND C1B
4.11 Climatic sequence
4.11.1 Initial measurements Capacitance
Measured in 4.4.2 and 4.9.2
Tangent of loss angle:
Measured initially in C1A and C1B
4.11.2 Dry heat Temperature: 110 °C
4.11.3 Damp heat cyclic
Test Db
First cycle
Duration: 16 h
4.11.4 Cold Temperature: - 55 °C
4.11.5 Damp heat cyclic
Test Db
Remaining cycles
Duration: 2 h
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 terminations
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: at 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 term.
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