Current Measurement; Real Power - janitza Prophi Operating Instructions Manual

Reactive Power Controller

Current measurement

The current transformer is connected to the clamps k
and l (/5A or /1A) from the outer conductor L1.
Please ensure during the installation of the current trans-
former, that the current transformer is passed by the
consumer current but not by the compensation current.
The current can be measured by an Amperemeter to
compare it with the current indicated by Prophi to check.
Please note, that the factory's presettings of the current
transformer ratio is set to 10 and must be adapted to the
existing current transformer.
If you should short-circuit the current transformer, the
indicated value on Prophi must decrease to 0A.
Examples for the setting of the current transformer
Example 1
Current transformer
Set Prophi to
Example 2
Current transformer
Set Prophi to
Example 3
Sum current transformer
Set Prophi to
Attention!
m
None earthed current transformer clamps can
be live.
= Key 1
200A/5A
40
500A/1A
500
1000A+1000A/1A
2000
= Key 2 = Key 3

Real power

If current and voltage are connected to Prophi accord-
ing to the connection diagram, a positive real power is
displayed in case of real power consumption. Real power
with a negative sign in the indication points to the sup-
ply of real power or an error of connection.
Possible error:
- Voltage and current are measured in the wrong outer
conductor.
- The current transformer clamps (k-l) are exchanged.
Attention!
m
For unequal load of the outer conductors, the
current should be measured in the outer con-
ductor, which is loaded most heavily.
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