Technical Guide
Testing self-powered relays with SVERKER 900
Page 14(33)
Figure 11. Schematic diagram representing the connections of the 3 current generators of SVERKER 900 to
WIC-1 and the operate contact. Also the connection diagram of WIC-1 is shown (from the WIC-
1 user’s manual
[5], Copyright SEG GmbH).
The operate (trip) signal is a DC polarized signal that sends a sequence of pulses, each pulse 50 ms long.
5.2.3. SVERKER 900 settings.
The binary input nr. 1
8
of SVERKER 900 needs to be configured in such a way to be able to manage the voltage
trip signal from WIC-1:
Voltage sensing, trigger on voltage presence (from “0” to “1”)
DC voltage threshold 20 V
Debounce time 30 ms.
Some small adjustments may be needed in case the measured operate time is noticed to be wrong (Figure 12),
by both adjusting the voltage threshold of the binary input 1 and/or the length of the debounce time.
Figure 12. Settings for Binary Input 1 of SVERKER 900 connected to the trip signal from WIC-1,
8 Note that only binary input 1 in SVERKER 900 has the flexibility to adjust both debounce filter and voltage threshold!
