AVR 8500 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 25

 

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IEC 60065, 6th edition : 1998

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- Page 21 of 44 - 

 

 

   

 

Order No. 

200211174

 

 

 

 

14.3 

Inductors and windings 

 

 

14.3.1 

Transformers and inductors marked 
with manufacturer's name and type    

Type:   
“55286170NR” for Main transformer, 
“5528634ANR” for Sub transformer, 
”55286320NR” for Standby transformer. 
 
Manufacturer’s name identification:   
“POWER TECHNICS CO.” for Main transformer, 
”KS” for Sub and standby transformers. 

14.3.2. 

Transformer category 

Isolating transformer 
 

14.3.3-5 

Transformer construction 

See below. 

14.3.3.2 

Transformers meet the 
constructional requirements : 

See below. 

Transformer/motor 

Insulation 

Insulation 

Test 

Flashover 

Creepage distances 

Part No/markings 

between 

resistance 

voltage 

Breakdown 

and clearances 

 

 

  M Ohm 

kV(60)s 

voltage kV 

Measured 

Required   

 

Components / construction 

   

Concentric winding on an isolate iron core. At least 3 
layers of insulation between primary and secondary 
winding. 

 

Components / construction 

   

Windings on two separate bobbins. The bobbins are 
placed in an insulating housing with two compartments, 
one above the other. Bobbin thickness : > 0,4mm. 

Transformer/mot
or 

Insulation 

Thickness (mm) 

Material 

Dielectric strength test 

Part 
No/markings 

between 

            X 

 

for each combination of 

 

 

    Number 

 

two (2) layers