DUET II (serv.man6) - JBL Audio EMC - CB Certificate (repair manual). Page 13

IEC 60950-1 (ed.1) 

 

- Page 7 of 8 - 

 

 

Report No.   114383 

 

6.2.2.1 

Add the symbol [NZ] in the right hand margin 
beside the first paragraph including Note 1. 

Delete the Note 2. 

Add the following after the first paragraph: 

In Australia (this variation does not apply in New 
Zealand), the electrical separation is subjected to 
10 impulses of alternating polarity, using the 
impulse test generator of annex N for 10/700µs 
impulses. The interval between successive 
impulses is 60 s and the initial voltage, Uc, is: 

- for 6.2.1 a): 7.0 kV for hand-held telephones 
and for headsets and 2.5 kV for other equipment; 
and 

- for 6.2.1 b) and 6.2.1 c): 1.5 kV. 

NOTE 201: The 7 kV impulse simulates lightning 
surges on typical rural and semi-rural network lines. 

NOTE 202: The 2.5 kV for 6.2.1 a) was chosen to 
ensure adequacy of the insulation concerned and does 
not necessarily simulate likely overvoltages.

 

No TNV circuitry. 

N 

6.2.2.2 

Add the symbol [NZ] in the right hand margin 
beside the second paragraph. 

Delete the Note. 

Add the following after the second paragraph: 

In Australia (this variation does not apply in New 
Zealand), the a.c. test voltage is: 

- for 6.2.1 a): 3 kV; 
and 

- for 6.2.1 b) and 6.2.1 c): 1.5 kV. 

NOTE 201: Where there are capacitors across the 
insulation under test, it is recommended that d.c. test 
voltages are used. 

NOTE 202: The 3 kV and 1.5 kV values have been 
determined considering the low frequency induced 
voltages from the power supply distribution system.

No TNV circuitry. 

N