Download Operating Instructions Universal measuring unit for heavy current

Connection modes
All voltage measurement inputs must originate
at circuit breakers or fuses rated 10 Amps
or less. This does not apply to the neutral
connector. You have to provide a method for
manually removing power from the device,
such as a clearly labeled circuit breaker or a
fused disconnect switch.
When using voltage transformers you have
to ensure that their secondary connections
never will be short-circuited.
No fuse may be connected upstream of the
current measurement inputs!
When using current transformers their secondary connectors must be short-circuited
during installation and before removing the
device. Never open the secondary circuit
under load.
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Terminal arrangement
2 11 1
2 11 1
3
k
Four-wire
three-phase
system
balanced
load
I: L1
L1
N
L1
N
2 11 1
u
L
v
U
L1
L2
L3
N
K
l
3
V
k
l
K
L
Current
transf.
L2
L3
Terminals
2
11
1
1
L2
L3
N
N
3
3
2
5
8
1
3
4
6
7
9
2
5
8
1
3
4
6
7
9
L1
L2
L3
K
l
L
k
2 11 1
u
k
V
l
K
2
Three-wire
three-phase
system
asymmetrical load
3
v
U
L1
N
L
2
3
8 1
5
5
3
8 1
k
L1
L2
L3
L1
L2
L3
2
8
5
u
v
u
v
U
V
U
V
k
L1
L2
L3
K
l
K
Current
transf.
L2
L3
l
L
Terminals
2
5
8
1
1
L2
L3
L3
L1
L1
L2
3
3
K
l
l
L
k
K
l
L
K
2
1
8
5
u
u
4
3
6
L
7
9
u
x
x
x
X
X
X
U
U
U
k
K
l
k
l
L
k
K
l
L
K
L
3 single-pole isolated voltage transformers
in the high-voltage system
L
3
1
L1
L2
L3
L1
L2
L3
Connect voltage according to the following
table in case of current measurement via
L2 or L3:
4
L1
L2
L3
N
Connect voltage according to the following
table in case of current measurement via
L2 or L3:
3
k
Three-wire
three-phase
system
balanced
load
I: L1
3
Terminal assignment
2 11 1
Singlephase
AC mains
2 11 1
L1
L2
L3
N
The connection of the inputs depends on the configured
system (connection type). The required device external
fusing of the voltage inputs is not shown in the following
connection diagrams.
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3