Read Harman Kardon HK 3480 EMC - CB Certificate online
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IEC 60065, 6th edition : 1998
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- Page 9 of 36 -
Order
No.
14648
HEATING
∆t = ( R2 - R1) x (234,5 + t1) - (t2 - t1)
R1
R1
P
t1 =
25,3 °C
25,3 °C
t2 =
26,5 °C
25,3 °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)
3,88
4,97
71,8
95
Class B
Sub transf. pr. winding (207V)
2846
3274
37,9
85
Class E
Main transf. pr. winding (254,4V)
3,88
5,12
83,0
95
Class B
Sub transf. pr. winding (254,4V)
2846
3401
50,7
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
54,4
62,5
95
Sub transformer core
32,7
41,1
85
Diode, D601 body
58,0
62,7
-
PWB near D601
47,2
50,0
85
PWB near Q321
49,3
62,7
85
Regulator, IC65 heat-sink
32,1
46,6
-
TR, Q319 body
54,5
71,0
-
PWB near Q319
38,1
48,1
85
E. Capacitor, C601 body
24,1
27,4
-
Main heat-sink
51,9
64,9
-
Power cord bushing
17,8
19,6
60
Top enclosure above main heat-sink
30,5
36,1
65 **)
Top enclosure above main transformer
24,0
28,0
40
Switch button
0,4
0,8
50
Comments
No other parts were observed to create any hazard due to temperature rise.
P
Test wall condition: 50 cm at top, 10 cm at other side
*) Temperature rise limits for Singapore is 10K less.
**) Directly covering part for heat-sink. The top cover is supplied with ventilation
openings covering most of the top cover. This indicate emission of heat from internal
parts and the opening area is therefore not likely to be touched during normal use.
openings covering most of the top cover. This indicate emission of heat from internal
parts and the opening area is therefore not likely to be touched during normal use.
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