Beckhoff KL3403 Series, Документация

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Mounting and wiring
KL3403 29 Version: 3.1.0
3.3.3 Connection
WARNING
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!
Fig. 16: Connection
Terminal point No.: Connection for Comment
L1 1 Phase L1 Connections for the voltage
measurement. (See
note
[
}
29] under Make sure ter-
minal point N is zeroed or
grounded!
)
L2 2 Phase L2
L3 3 Phase L3
N 4 Neutral conductor N (internally connected to terminal point I
N
,
capacitively connected to the grounding contact for the mounting rail)
I
L1
5 Current transformer at L1 Connections for the current
transformers. (See
note
[ } 30] under Operate the
current transformer as in-
tended!
)
I
L2
6 Current transformer at L2
I
L3
7 Current transformer at L3
I
N
8 Star point of the current transformers
(internally connected to terminal point N,
capacitively connected to the grounding contact for the mounting rail)
*) The KL3403-0026 has no capacitive connection to the grounding contact of the mounting rail!
CAUTION
Make sure terminal point N is zeroed or grounded!
If you do not connect the terminal point N with the neutral conductor of your mains supply (e.g. if the
KL3403 is used purely for
current measurements [
}
33] ), terminal point N should be earthed, in order to
avoid dangerous overvoltages in the event of a current transformer fault!