HK 3390 (serv.man3) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 11

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- Page 4 of 13 - 
 
 
 
 Report 
No. 
132229 
 
 
 
HEATING UNDER NORMAL OPERATING CONDITIONS 
 
7.1 
Temperature rises not exceeding specified values, 
no operation of fuse links 
No fuse links operate during 
normal operating operation. 
(see appended table 7.1) 
7.1.2 
Temperature rise of parts providing electrical 
insulation 
(see appended table 7.1) 
7.1.4 
Temperature rise of windings 
(ee appended table 7.1) 
 
10 INSULATION 
REQUIREMENTS 
 
10.1 
Insulation resistance (MΩ) at least 2 MΩ min.   
after surge test for basic and 4 MΩ min. for 
reinforced insulation : 
> 100 M
Ω, after surge test   
10.2 
Humidity treatment 48 h or 120 h : 
120 h (40
°C).  
No impairment 
10.3 
Insulation resistance and dielectric strength 
between mains teminals 
(see appended table 10.3) 
 
Insulation Resistance and dielectric strength 
across BASIC or SUPPLEMENTARY insulation 
(Class 1) 
Class II apparatus. 
N/A 
 
Insulation resistance and dielectric strength across 
REINFORCED insulation (Class II) 
(see appended table 10.3) 
 
14 COMPONENTS 
 
14.3.3 Constructional 
requirements 
 
14.3.3.1 
Clearances and creepage distances comply with 
clause 13 
(see appended table 14.3.3) 
14.3.3.2 
Transformers meet the constructional 
requirements 
(see appended table 14.3.3) 
14.3.4.1 
Class II transformers have adequate separation 
between hazardous live parts and accessible parts 
(double or reinforced insulation) 
Double or reinforced   
insulation between primary   
and secondary windings   
according to clause 8.8. 
(see appended table 14.3.3) 
 
Coil formers and partition walls > 0,4 mm 
The bobbin of transformers 
fulfils the requirement of   
reinforced insulation;   
bobbin thickness > 0.4 mm. 
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