Reference Manual
BLR-CX-R / BLR-CX-T
Rev. 07
2018-07
7
2
COMMISSIONING
The BLR-CX comes with factory settings, which allows operation in 400V grid without any
settings, if the connection is correct.
After applying voltage, the display shows the measured cos
and displays „Auto“. The
measured cos
should be inductive (displayed by a small „i“ behind first line). With applying
the voltage to the BLR-CX the discharge blocking time for the capacitors starts ( Factory setting
75 sec.). After the discharge blocking time the regulation starts. Stepsizes will be detected
automatically. Control exits which are not used, become adjusted to step status “Fix-Off” after
three switching cycles without success. These outputs are blocked for the control.
To display values, which are depending on the current, it’s necessary to adjust the ct ratio.
This setting is not necessary for the control.
FAQ during Commissioning:
1)
No indication AUTO -> the relay does not switch
Cause: Relay is set to manual operation
In SETUP/100 menu the selection for PFC is on OFF or HOLD, temperature is too high,
current < 15mA, voltage or THD U is out of tolerance.
2)
Indication U ALARM -> voltage out of tolerance
Check settings for nominal voltage (SETUP/Un) and voltage transformer (SETUP/Pt)
3)
Indication I Lo ALARM -
>
CT current < 15mA
Cause: connection error of CT; short-link of CT is not removed; CT-ration is too high compared
to real current; no current
4)
Indication EXPORT -> kW export
if there is no real kW export, voltage and current connection to BLR-CX has to be checked! See
Wrong Connections / AI
5)
Wrong Cos j indication -> wrong connection
voltage and current connection to BLR-CX has to be checked! See Wrong Connection / AI
6)
Steps switch in and then quickly switch out again
See Stepsize Detection / Defective Capacitors
7)
Frequent switching of steps
size of capacitors has not been completly detected