Technical Guide
Testing self-powered relays with SVERKER 900
Page 11(33)
Figure 7. Meaning of
the dipswitches (table
from the WIC-
1 user’s
manual pages 20, 21
and 22 [5] , Copyright
SEG GmbH), their
position in the tested
relay and list of different
CTs
The Normal Inverse characteristic for WIC-
1 relay is the standardized curve “A” (Inverse) in IEC 60255-151
Figure 8.
The formulae for the “A” curve in IEC and for the Normal Inverse curve in WIC-1 are identical
