Page 12
Reactive Power Controller
= Key 1
= Key 2
= Key 3
Switching outputs
The reactive power controller Prophi can be equipped
with up to 12 switching outputs. The switching outputs
can be equipped either with relay or transistor outputs.
If a device is equipped with relay or transistor outputs
it is not shown on display. The equipment can be seen
in the connection diagram on the back of Prophi.
Relay outputs
Capacitor contactors can be connected to the relay out-
puts according to the connection example "Relay out-
puts".
Transistor outputs
Semi conductor switches, switching at zero crossing,
must be connected to the transistor outputs of the reac-
tive power controller.
The transistor outputs switch the voltage of an external
d.c. net supply to the semiconductor switches.
Check switching outputs
Please switch in the capacitor stages in manual mode:
The inductive reactive power is decreased by the power
of the respective capacitor stage.
Please switch off the capacitor stages in manual mode:
The inductive reactive power is increased by the power
of the respective capacitor stage.
Possibility of errors:
The outputs do not switch
- Relay output defective.
- Transistor output defective.
The change of the reactive power is faulty
- The current is measured incorrectly.
- A wrong current transformer ratio is set.
- The current is measured in the wrong outer
conductor.
- The voltage is measured in the wrong outer
conductors.
- The current transformer clamps k-l are exchanged.
The reactive power does not change
- The current transformer is installed at the wrong
place.
- Switching outputs faulty.
- The wrong control voltage is connected to the
switching outputs.
Diagr.: Connection example "Transistor outputs"
Attention !
For devices with relay or transistor outputs,
there are different control voltages applied
to the switching outputs.
15-30VDC
F0,2A
Prophi
1
2
3
C1
Diagr.:Connection example "Relay outputs"
Attention!
The relai and transistor outputs are live.
c
m
Prophi
C1
1
2
..
1
0
A
max. 250V
2
3
Attention!
If a switching frequency of 50Hz is programmed
for the transistor outputs, the serial interface
does not work!
m
