Beckhoff EL34 Series - Power Measurement Including Differential Current Measurement

Application examples
EL34xx 267Version: 1.5
7.6 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 [}29] and the connections I
L1
, I
L1’
, I
L2
, I
L2’
,
I
L3
, I
L3’
and I
N
, I
N’.
WARNING
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!
Fig.168: Common wiring of the EL3453 power measurement terminal
In the following diagram, the current measuring channel I
N
is used to measure the neutral conductor current.