DOC. MIE91093 Rev. 1.34 Page 33 of 145
Referring to the above scheme, the voltage V is locked to the
network. If the phase angle of the current is higher than 90°,
this means that the active power P is negative (working point
in 2
nd
or 3rd quadrant).
The test is performed using the main current generator and
the auxiliary voltage generator, at different phase shifts.
Parameters involved are three: voltage; current; phase shift;
so, in the following, the test is performed at nominal voltage,
selecting the phase angle and changing the current to find the
threshold at the selected angle.
As the setting is in percent of the nominal power, it is possible
to use the power measurement, that is available on T1000
PLUS.
1.4.2. Connection of the relay
The following is the connection schematic.
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