100
110
120
130
140
150
160
170
180
190
200
50 60 70 80 90 100
% Nominal Voltage
% Nominal Current
INFO
The voltage values for the six points on the curve are fixed; the current values can be adjusted in the range 50-200%.
INFO
Voltage and current % values refer to the nominal settings.
INFO
Timer value can be adjusted in the range 0.1- 60.0 sec.
3.9 Decision of measurements
The protection for unbalanced voltage, for example, can be set to either a phase-phase or a phase-neutral measurement. These
settings also influence other protections and settings in the AGC. There are three parameters that can change how the
measurements are done in the AGC: 1201, 1202 and 1203.
In parameter 1201 it can be set how the voltage measurements should be done for example on generator voltage protection. It can
be set to either phase-phase or phase-neutral; by default it is set to phase-phase. When this parameter is set, it should be taken into
account how the loads in the application are connected. If many of the loads are connected as phase-neutral, the setting of
parameter 1201 should be set to phase-neutral. On a generator controller it will be the voltage measurements on the generator side
of a breaker, and on a mains controller it will be the voltage measurements on the mains feeder side of the mains breaker.
Parameter 1201 influences
1150, 1160 Generator over-voltage protection 1 and 2.
1170, 1180, 1190 Generator under-voltage protection 1, 2 and 3.
1510 Generator unbalanced voltage protection.
1660, 1700
Mains time-dependent under-voltage 1 and 2 (measured on mains feeder side of mains breaker, only in
mains controllers).
Parameter 1202 is similar to 1201. It is also considering how the measurements should be made. But this parameter refers to the
other voltage measurements. On a generator controller it will be the busbar voltage measurements, and on a mains controller it will
be the voltage measurements after the mains breaker. This parameter can also be set to phase-phase measurement or phase-
neutral measurement.
DESIGNER'S HANDBOOK 4189341275A EN Page 73 of 196
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