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3.4.1
Application examples for alternating current
Risk of injury through electric shock and damage to the device!
Bring the Bus Terminals system into a safe, de-energized state before starting mounting, disassembly or
wiring of the Bus Terminals!
Operate the current transformer as intended!
Please note that many manufacturers do not permit their current transformers to be operated in no-load
mode! Connect the KL3403 to the secondary windings of the current transformers before using the current
transformer!
Power measurement at a machine
• The voltage is measured via connections L1, L2, L3 and N.
• The current is measured via three current transformers [} 20] and the connections I
point of the current transformers).
Do not confuse current and voltage circuit!
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 33 mΩ) would destroy the
power measurement terminal!
Fig. 17: Application example - power measurement at a machine
KL3403
WARNING
CAUTION
NOTE
Version: 3.1.0
Mounting and wiring
, I
, I
and I
(star
L1
L2
L3
N
31
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