Temperature Gradient Graph For Wti With External 1A And 5A Matching Unit; Figure 4 - Guideline For Adjustment Of Heating Current - Qualitrol AKM OTIWTI Instruction Manual

AKM 345 Gen2 Instruction Manual
5.2. Temperature Gradient Graph for WTI with External 1A and 5A
Matching Unit
Gradient
dT °C
40
30
20
10
0,5
0,5
Figure 4 – Guideline for Adjustment of Heating Current
Keep cover mounted, feed a stable current and wait 45 min, before reading
winding temperature.
Oil temp. 30°C
1 1,5
2 4,5
Gradient °C for bulb type 11, 12, 15 and 18
10 12 14
0,72 0,79 0,86
(Rev No. ECN-27992)
Bulb in filled well.
Approximate temperature
rise above oil temperature.
I = 2,3 A continuously
max
I = 10 A, for 5 s
max
Thermal time constant
(63,2% value) approx. 9 min.
Heating Current
I (A)
2
S (VA)
16 18 20
0,92 0,99 1,04
Heating Current Amp. I2 ±5%
5
22 24 26
1,1 1,15 1,21
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28 30
1,26 1,31