Function
9
Fig. 2.1: Starting sequence
Starting sequence
2 s
Calibration
(Offset measurement)
2 s
0
.
5 s
X12 = HIGH
Delay
0
.
05...0
.
1 ms
X12 = HIGH
10..
.
11 ms
X10 < 50 μs
HIGH ?
No
Yes
No
Yes
Yes
Yes
No
No
X10 > 100 μs
HIGH ?
Yes
No
No
Yes
Switch on test current
through test winding
Test current
measurement
Switch off test current
through test winding
0
.
1 s
2
.
0 s
0
.
1 s
Start ∆ I-measurement
+
U
S
≥ 5 V
?
+
U
S
≥ 11 V
?
+
U
S
≥ 11 V
?
X10 > 5 ms
HIGH?
X12 = LOW
