Tettex 2293 - Parallel Mode on LV-Side 16 A ¦ 100 V (B1) or 32 A ¦ 50 V (B2)

22
Theory
Current
+25V
+50V
+75V
+100V
800W
-100V
-75V
-50V
-25V
0V
400W
32A
24A
8A
4A
16A
Supply
Region
(Charging)
Active Load
Region
(Discharging)
Voltage
The following diagram shows the operating area for power supply in mode A2 and B2 - 32A ¦
50V:
Current
+25V
+50V
+75V
+100V
800W
-100V
-75V -50V
-25V
0V
-12.5V
400W
32A
24A
8A
4A
16A
Supply
Region
(Charging)
Active Load
Region
(Discharging)
Voltage
3.2.2 Parallel Mode on LV-side 16A ¦ 100V (B1) or 32A ¦ 50V (B2)
This supply mode is selected, when a phase on the low voltage side of the transformer has to be
measured without the corresponding phase on the high voltage side. The three supplies are
connected in parallel and the range is selected according to the desired measuring current as
follows:
I ≤ 16.0A  16A ¦ 100V
I > 16.0A  32A ¦ 50V
The measuring circuit for phase a of an YNyn0 transformer is illustrated below: