NOVAR 2100/2200 Operating Manual
Notes :
CT supposed in the L1 phase with correct orientation (S1, S2 terminals)
the U1-angle expressed as „x-y“ where the „x“ means the phase connected to the U1 terminal
and the „y“ phase connected to the N terminal (=0)
If the current signal is from opposite side of the power supply transformer than the voltage
signal, the U1-angle must be set with respect to the transformer phase angle.
At this phase it is strongly recommended to set the CT ratio in parameter No. 71 too. It is
necessary for successful result of the AOR process that usually follows immediately after
the ACD-process.
3.1.2.3 ACD Process – Automatic Connection Detection
The type of connection
must be set always manually (in parameter group Np. 72).
The U1-angle
can be set manually too, but we strongly recommend to use automatic setup –
the ACD
process
(Automatic Connection Detection). This process not only detects and sets the U1-angle, but
network nominal votage U
NOM
as well.
For the ACD process usage,
capacitors only
must be connected to
the first four
control
outputs
. If any chokes connected to the outputs, the process gets fail results !
If inappropriate compensation elements connected to the first four outputs,you can set such
outputs temporary to
the fixed-off
control state; then the instrument will use tor the ACD
process the next four outputs that are set as
the control
outputs.
Following conditions must be fulfilled for the ACD process launch :
•
U1-angle
is not defined (---)
•
branch of measured data is displayed
Then the controller launches this process automatically after powerup (if it is not in
the standby
state
due to any of alarms).
The process can be restarted manually too. For this, scroll to
the U1-angle
(P.72) and set it as
undefined (---) :
Fig. 3.1: Connection Type 1Y3 and U1-Angle
After return to measured data branch the ACD process starts.
15
connection type
U1-Angle
(undefined)
