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Report
No.
132230
7.1
TABLE: temperature rise measurements
P
Monitored point:
dT (K) at
198V, 60Hz
dT (K) at
242V, 60Hz
Limit dT (K)
Sub transformer core
31.3
35.1
85
E-capacitor, C112 body
23.6
26.9
85
°C
PWB near D109
25.1
28.0
95
Ambient
25.5
o
C 24.7
o
C -
Winding temperature rise
measurements
measurements
198V,
60Hz
242V,
60Hz
—
Ambient temperature t1 (
o
C) :
22.0
22.0
—
Ambient temperature t2 (
o
C) :
25.5
24.7
—
Temperature rise dT of winding:
R
1
(Ω)
R
2
(Ω)
dT (K)
Limit dT
(K)
Insulation
class
Sub transf. Pri. winding (198V, 60Hz)
3782
4294
31.2
85
E
Sub transf. Pri. winding (242V, 60Hz)
3782
4375
37.5
85
E
10.3
TABLE: insulation resistance measurements
P
Insulation resistance R between:
R (MΩ)
Required R (MΩ)
Between mains poles (primary fuse disconnected)
> 100
Min 2
Between parts separated by double or reinforced insulation
> 100
Min 4
10.3
TABLE: electric strength measurements
P
Test voltage applied between:
Test voltage (V)
Breakdown
Mains poles (primary fuse disconnected)
1500Vac No
Between parts separated by double or reinforced insulation
3000Vac No
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