GRUP ARGE SMART GES1, Instruction Manual

Page: 27 / 44

Smart SVC Relay Instruction Manual
27

The current transformer tips of L1 phase to k2-12 inputs, the current transformer tips of
L2 phase are connected incorrectly to k1-11 inputs. In this case, the voltage tips of L1
and L2 phases must be interchanged.
Figure 3.42
Possible causes and solutions according to
Figure 3.42:

The voltage tips and current transformer tips of phases are not matched. In this case, the
voltage tips of any two phases must be interchanged and the test must be repeated.
According to the new test result, the matching error in other phases must be fixed.
Figure 3.43
Possible causes and solutions according to Figure 3.43:

This warning is not expected normally. Thus, unexpected powers are measured when
we draw the stage. It means that the relay cannot detect transformer directions from
these pointless powers. Generally, if stages that are activated for transformer test are
left in two phases or there are powers in and out, these unexpected values occur. In
this case, taking large powerful capacitors in the first stages and making the current,
drawn by system, stable ease the transformer test.
3.2.4 Stage Control
The Stage Control menu comes after the Transformer Test (Figure 3.44 ) menu.
Figure 3.44
L1 L2 L3 Preparing
Reverse...
Stage Control
Yes ->No
L1 Preparing
Reverse...
L2 Preparing
Reverse...
L3 Preparing
Reverse...