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- Page 49 of 51 - 

 

 

 

 

Report No.  27772 

 

 
TRF No.:IECEN60950_1B 

 

 

4.5 

TABLE: maximum temperatures 

 

 

test voltage (V)  ..............................: 

18 

VAC 

 

 

 

 

 

t

amb1 

(

°

C) Normal.............................: 

25 

 

 

 

 

 

t

amb2 

(

°

C) Blocked Vent ....................: 

 

25 

 

 

 

 

maximum temperature T of part/at: 

T (

°

C) 

allowed 

T

max

 (

°

C) 

C16 (105ºC) 

43 

42 

 

 

 

105 

C64 (105ºC) 

43 

43 

 

 

 

105 

C56 (105ºC) 

46 

47 

 

 

 

105 

C78 (85ºC) 

50 

52 

 

 

 

85 

C79 (105ºC) 

47  

48 

 

 

 

105 

PCB under U14 (130ºC) 

66 

72 

 

 

 

130 

PCB under U15 (130ºC) 

64  

68  

 

 

 

130 

Power input connector (70ºC) 

40 

38  

 

 

 

70 

 

supplementary information: 

 

 

temperature T of winding: 

R

1

 (

Ω

) 

R

2

 (

Ω

) 

T (

°

C) 

allowed 

T

max

 (

°

C) 

insulation 

class 

N/A 

 

 

 

 

 

supplementary information: 

 

 
 

4.5.2 

TABLE: ball pressure test of thermoplastic parts 

 

 

allowed impression diameter (mm) ..................... : 

≤

 2 mm 

 

part 

test temperature (

°

C)  impression diameter 

(mm) 

 

 

 

supplementary information: 

 

 

 

 

- Page 50 of 51 - 

 

 

 

 

Report No.  27772 

 

 
TRF No.:IECEN60950_1B 

 

4.7 

TABLE: resistance to fire 

 

 

part 

manufacturer of material 

type of material 

thickness 

(mm) 

flammability 

class 

 

 

 

 

 

supplementary information: 

 

 

5.1 

TABLE: touch current measurement 

 

 

Measured between: 

Measured  

(mA) 

Limit  

(mA) 

Comments/conditions 

 

 

 

 

supplementary information: 

 

 

5.2 

TABLE: electric strength tests, impulse tests and voltage surge tests 

 

 

test voltage applied between: 

test voltage (V) 

a.c. / d.c. 

breakdown 

 Yes / No 

 

 

 

supplementary information 

 

 

5.3 

TABLE: fault condition tests 

 

ambient temperature (

°

C)  ................................. : 

25 

 

model/type of power supply  .............................. : 

— 

 

manufacturer of power supply  ........................... : 

— 

 

rated markings of power supply ......................... : 

— 

 

component   
No. 

fault 

test voltage 

 (V) 

test time 

fuse 
No. 

fuse current 

(A) 

result 

— 

Top port on 
subwoofer 
blocked.   

18 VAC 

4 hours 

— 

1.45 

No effect.  No significant 
rise in temperatures.  
Temperatures also in table 
4.5.  No hazard. 

 

 

 

 

 

 

 

supplementary information:

 

 

 
 

 

 

- Page 51 of 51 - 

 

 

 

 

Report No.  27772 

 

 
TRF No.:IECEN60950_1B 

 

C.2 

TABLE: transformers 

 

 

Loc. 

Tested ins ulation 

Working 
voltage 
peak / V 
 
(2.10.2) 

Working 
voltage 
rms / V 
 
(2.10.2) 

Required 
electric 
strength 
 
(5.2) 

Required 
clearance / 
mm 
 
(2.10.3) 

Required 
creepage 
distance / 
mm 
(2.10.4) 

Required 
distance 
thr. insul. 
 
(2.10.5) 

 

 

 

 

 

 

 

* 

Loc. 
 
 
 
 

Tested insulation 

 

 

Test 
voltage/ V 

Measured 
clearance / 
mm 

Measured 
creepage 
dist./ mm 

Measured 
distance 
thr. insul. / 
mm; 
number of 
layers 

 

 

 

 

 

 

supplementary information: 

 

 
 

- Page 1 of 6 - 

 

 

 

 

Order No. 

27772

 

 

 

This Annex sets out variations between this Standard and IEC 60950-1:2001. These variations indicate 
national variations for purposes of the IECEE CB Scheme and will be published in the IECEE CB Bulletin. 
These variations are indicated within the body of the Standard. 

The variations are as follows:  

1.2 

Between the definitions for ‘Person, service’ 
and ‘Range, rated frequency’ insert the 
following: 
Potential ignition source     1.2.12.201 

Considered. 

1.2.12.15 

After the definition of 1.2.12.15, add the 
following: 
1.2.12.201 potential ignition source: Possible 
fault which can start a fire if the open-circuit 
voltage measured across an interruption or 
faulty contact exceeds a value of 50 V (peak) 
a.c. or d.c. and the product of the peak value of 
this voltage and the measured r.m.s current 
under normal operating conditions exceeds 15 
VA. 
Such a faulty contact or interruption in an 
electrical connection includes those which may 
occur in conductive patterns on printed boards.  

NOTE 201 An electronic protection circuit may 
be used to prevent such a fault from becoming a 
POTENTIAL IGNITION SOURCE. 

NOTE 202 This definition is from AS/NZS 
60065:2003. 

Considered. 

1.5.1 

Add the following to the end of first paragraph: 
‘or the relevant Australian/New Zealand 
Standard’. 

All critical components are IEC, UL 
or CSA certified. 

1.5.2 

Add the following to the end of first and third 
dash items: 
‘or the relevant Australian/New Zealand 
Standard’. 

All critic al components are IEC, UL 
or CSA certified. 

2.1  

Delete the Note. 

 

3.2.3 

Delete Note 2.