Beckhoff EL34 Series User Manual

Application examples
EL34xx262 Version: 1.5
7.2 Power measurement at a machine
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!
NOTE
Attention! Risk of device damage!
Avoid confusing the current and voltage circuit during connection, since the direct connection of mains volt-
age to the terminal points for the current transformers (typical input resistance 100mΩ) would destroy the
power measurement terminal!
EL3443
• The voltage is measured via connections L1, L2, L3 and N.
• The current is measured via three current transformers [}29] and the connections I
L1
, I
L2
, I
L3
and I
N
(star
point of the current transformers).
Fig.163: EL3443, power measurement at a machine
Negative power values
If negative power values are measured on a circuit, please check whether the associated current
transformer circuit is connected correctly.
EL3453
• The voltage is measured via connections L1, L2, L3 and N.
• The current is measured via 4 current transformers [}29] and the connections I
L1
, I
L2
, I
L3
and I
N
(star
point of the current transformers).

Beckhoff EL34 Series Specifications

General

Brand	Beckhoff
Model	EL34 Series
Category	Touch terminals
Language	English