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Electrex FEMTO 96 Manual de instalación
Voltage connection: Use cables with max cross-section of 2,5 mm
the applicable diagrams that follow.
Current connection
It is necessary to use external CTs with a primary rating adequate to the load to be metered and with a 5A or 1A secondary rating. The number of CTs to be used (1 or 3) depends upon
the type of network. Connect the CT output(s) to the terminals marked I1, I2, I3 (CURRENT INPUT) of the instrument according to the applicable diagrams that follow. Use cables with
cross-section adequate to the VA rating of the CT and to the distance to be covered. The max cross-section for the terminals is 2,5 mm
N.B. The CT secondary must always be in short circuit when not connected to the instrument in order to avoid damages and risks for the operator.
Warning: The phase relationship of voltage and current connections, the P1-P2 direction and the S1-S2 connection of the CT(s) must be correct. Earth only CT on L1 as shown in
diagram (CT's are internally linked). Disregard of this warning or of wiring diagram leads to major measurement errors.
4W Star (4 wire) 3PH-4W
L1
L2
L3
N
3W Delta (3 wire) 3PH-3W-2CT
L1
L2
L3
akse srl Via Aldo Moro, 39 42124 Reggio Emilia Italy
Tel. +39 0522 924 244 Fax +39 0522 924 245 [email protected] www.akse.it
P.I. 01544980350 R.E.A. 194296
VOLTAGE AND ELECTRIC CURRENT CONNECTION
2
if stranded 4 mm
P1
P2
S1
S2
P1
P2
S1
S2
P1
P2
S1
S2
S1 S2 S1 S2 S1 S2
7 8
9
10
11
I1
I2
I3
AUX
CURRENT INPUTS
IN/OUT
POWER
VOLTAGE INPUTS
RS-485
SUPPLY
U1 U2 U3
N
16
17
A B
P1
P2
S1
S2
P1
P2
S1
S2
S1 S2 S1 S2 S1 S2
7 8
9
10
11
I1
I2
I3
AUX
CURRENT INPUTS
IN/OUT
POWER
VOLTAGE INPUTS
RS-485
SUPPLY
U1 U2 U3
N
16
17
A B
Cap. Soc. Euro 85.800,00 i.v.
2
if rigid and connect them to the clamps marked VOLTAGE INPUT on the instrument according to
L1
N
L1
L2
POWER SUPPLY AND SERIAL LINE CONNECTION
The instrument is fi tted with a separate power supply. The power supply terminals are
numbered (16) and (17). Use cables with max cross-section of 2,5 mm
mm
if rigid.
2
if stranded and 4 mm
2
2
SINGLE PHASE 1PH-2W
P1
P2
S1
S2
S1 S2 S1 S2 S1 S2
7 8
9
10
11
I1
I2
I3
AUX
CURRENT INPUTS
IN/OUT
POWER
VOLTAGE INPUTS
RS-485
SUPPLY
U1 U2 U3
N
16
17
A B
BI-PHASE 2PH-2W
P1
P2
S1
S2
S1 S2 S1 S2 S1 S2
7 8
9
10
11
I1
I2
I3
AUX
CURRENT INPUTS
IN/OUT
POWER
VOLTAGE INPUTS
RS-485
SUPPLY
U1 U2 U3
N
16
17
A B
S1 S2 S1 S2 S1 S2
7 8
9
10
11
I1
I2
I3
AUX
CURRENT INPUTS
IN/OUT
POWER
VOLTAGE INPUTS
RS-485
SUPPLY
U1 U2 U3
N
16
17
A B
FUSE
230 ÷ 240 V ±10%
(50mA T)
N
L
Engineered and manufactured in Italy
Pensato, progettato e prodotto in Italia
Subject to modifi cation without notice.
if rigid.
2
if stranded, 4
Made
in
Italy
Edition 02-07-2008