Read Harman Kardon AVR 230 (serv.man12) EMC - CB Certificate online
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IEC 60065, 6th edition : 1998
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- Page 9 of 37 -
Order
No.
14399
HEATING
∆t = ( R2 - R1) x (234,5 + t1) - (t2 - t1)
R1
R1
P
t1 =
24,5 °C
24,5 °C
t2 =
23,3 °C
22,1 °C
Test voltage
207 V
254,4 V
Winding
R1/
Ω R2/Ω
∆t measured
∆t allowed *
Insulation
class
class
Main transf. pr. winding (207V)
2,42
2,93
55,8
85
Class E
Sub transf. pr. winding (207V)
2728
3141
40,4
85
Class E
Main transf. pr. winding (254,4V)
2,42
3,08
73,0
85
Class E
Sub transf. pr. winding (254,4V)
2728
3279
54,7
85
Class E
Other measured parts
∆t measured
at 207V
at 207V
∆t measured
at 254,4V
at 254,4V
∆t allowed *
Main transformer core
48,6
59,1
85
Sub transformer core
32,4
43,3
85
D992 heat-sink
58,8
62,7
-
D991 heat-sink
61,8
66,5
-
PWB near D992
56,6
60,1
85
TR, Q803 body
49,3
62,2
-
TR, Q804 body
36,5
48,7
-
TR, Q657 body
51,7
66,6
-
PWB near Q657
43,4
55,1
85
E. Capacitor, C909 body
26,6
30,4
-
E. Capacitor, C929 body
36,5
45,5
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IC91 body
47,5
61,8
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Main heat-sink
50,3
63,6
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Top enclosure above main transformer
23,2
30,5
65 **)
Top enclosure above main heat-sink
34,5
42,5
65 **)
Power switch button
1,1
1,3
50
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