elco ELM-4D1P, Instruction Manual

Page: 4 / 16

ELM-4D1P instruction manual IM443-U v0.7 pag. 4
me
as
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nt
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p
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0
11
0
23
0
40
0
me
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p
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ur
re
n
I2
s
I1
me
a
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I2
s
I1
INSERTION ON THREE-PHASE LINE WITH 4 WIRES
m
eas
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rr
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in
p
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ts
0
11
0
23
0
400
0
11
0
23
0
40
0
0
11
0
23
0
40
0
m
eas
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ol
tag
e
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pu
ts
me
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ol
ta
ge
in
p
ut
s
m
e
as
u
re
v
o
ltag
e
in
p
ut
s
S1
S2
auxiliary power
supply
S1
S2
me
a
su
re v
o
lta
g
e
in
pu
ts
S1 S2
Di
gi
ta
l O
ut
put
s
im
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asu
re
vo
lta
ge
in
p
ut
s
I3
S1
ELM
S2
V
L1
V
L2
V
L3
N
Digital Input connection
From 80 to 250 Vac
From 90 to 250 Vdc
L1
S1
L2
P1
S1
L3
P1
N
S1 S2
P1 P2
it’s better to put a fuse (50mA 250 V fast)
on the digital input.
The maximum current absorbed is 1 mA.
N.B. on line with 3 wires (without neutral or with neutral not supplied) the N
terminaln must not be connected.
INSERTION ON THREE PHASE LINE WITH 3 WIRES AND 2 CT
(AARON insertion)
(only for INSULATED CURRENT INPUTS option)
ELM with
internalCT
S1
I1
S2
auxiliary power
supply
S1
I2
S2
S1
ELM
I3
S2
V
L1
V
L2
V
L3
N
with Ineutral
option
In
V
L1
V
L2
V
L3
N
L1
S1
L2
P1
L3
S1 S2
L1
L2
L3
S1 S2
N
P1 P2
P1 P2
CT connection to
Voltage insertion with 3 VT
N.B. it’s better, where possible, to use 3 CT (above all with unbalance loads)
read the neutral
current
INSERTION ON THREE-PHASE BALANCED WITH 3 OR 4 WIRES
S1
S2
auxiliary power
supply
S1
S2
I3
S1
ELM
S2
V
L1
V
L2
V
L3
N
Digital Outputs:
DO1 output if used as PULSE is linked to the
ACTIVE ENERGY counter,
DO2 output if used as PULSE is linked to the
REACTIVE ENERGY counter.
DO1 and DO2 can be used as ALARM and they
can be linked to a measure.
L1
S1
P1
L2
L3
N
Max 150mA
Max 230Vac/dc
N.B. on line with 3 wires (without neutral or with neutral not supplied) the N
terminaln must not be connected.
ELM
INSERTION ON SINGLE PHASE
L1
S1
S2
P1 P2
N
S1
I1
S2
auxiliary power
supply
S1
I2
S2
ELM
S1
I3
S2
V
L1
V
L2
V
L3
N
N.B. If the multimeters are used on single phase line, the measure are
referred on the L1 phase. The others datadisplayed relatives at three
phase system are not to consider.