Power measurement including differential current measurement
- The voltage is measured via connections L1, L2, L3 and N.
- The current is measured via three or four current transformers (e.g. the SCT series from Beckhoff) and the connections IL1, IL1’, IL2, IL2’, IL3, IL3’ and IN, IN’.
| |
WARNING: Risk of electric shock! Bring the Bus Terminal system into a safe, voltage-free state before starting mounting, disassembly or wiring of the Bus Terminals! |
In the following diagram, the current measuring channel IN is used to measure the neutral conductor current.
Diagram of a different transducer arrangement for direct measurement of the differential current:
The secondary current path of the differential current transformer must be connected to the terminal contacts IN (and IN').
For correct calculation of the differential current value, the corresponding transformer ratio must be entered in CoE object 0xF804:12.
Example: Transformer ratio 1A:50A corresponds to value to be entered 0.02