F1772 X2

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Vishay Roederstein

Revision: 15-Apr-14

9

Document Number: 28161

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

SUB-GROUP C1 COMBINED SAMPLE

OF SPECIMENS OF SUB-GROUPS



C1A AND C1B

4.11

Climatic sequence

Capacitance



4.11.1 Initial measurements

Measured in 4.4.2 and 4.9.2



Tangent of loss angle



Measured initally in C1A and C1B



4.11.2 Dry heat

Temperature: 110 °C



Duration: 16 h



4.11.3 Damp heat cyclic



Test Db, first cycle



4.11.4 Cold

Temperature: -40 °C

Duration: 2 h



4.11.5 Damp heat cyclic

Test Db, remaining cycles



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



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



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