ELECTREX S.r.l. via Claudia, 96 - 41096 Savignano s/P (MO) - Italy - Tel. +39.59.796372 Fax. +39.59.796378
SUBJECT TO CHANGE WITHOUT NOTICE 02/2004
KILO
KILO M
Fig. 10
Fig. 9
Fig. 12
Fig. 11
Fig. 13
Fig. 14
C 1 2
C
= Common
1
= Meter 1
2
= Meter 2
Min Pulse 5 mSec.
INSTRUMENT
INTERIOR
INSTRUMENT
ESTERIOR
Connection to voltage-free
contacts
Connection to open-collector transistor
4.4
ALARMS CONNECTION
There are two alarms which drive two relays, the terminals are internally connected to
noramlly open voltage free contacts of an opto-mos (solid state relay) rating 250 VDC, 100mA.
Use cables with max. gauge 4 mm
2
for the terminal connections (see Fig. 15).
C
= Common
NO
= Normally Open
C NO C NO
Fig. 15
Fig. 7-1
Fig. 7-2
Fig. 8-1
Fig. 8-2
Current signal connection
with 2 CTs (L1 and L2)
Current signal connection
with 2 CTs (L1 and L3)
Connection of 2 CTs in Cogeneration mode
The drawing in Fig. 6 indicates how to make the current connections with 3 CTs. The Fig. 7-
1 and 7-2 indicate how to connect current signal using 2 CTs (Phase L1 and L2 or Phase L1
and L3).
CAUTION:
In case of connection of 2 CTs it is absolutely essential to respect the sense
(orientation) of the CTs current output as indicated in the drawings (Fig. 7-1 and 7-2).
Advanced Functions:
If the instrument has been programmed for Cogeneration mode,
connection of the CTs must be carried out as indicated in the drawings in Fig.10-1 and Fig.10-
2 located on the next page.
4.2 CONNECTION ON UNBALANCED THREE-PHASE 4 WIRE NETWORKS
The drawing in Fig.10 indicates how to make the current connections with 3 CTs.
4.2.1 HIGH VOLTAGE THREE PHASE WIRES DELTA NETWROK WITH CT's
AND VT's
L1
L3
L2
L1
L2
L3
L1
L3
L2
L1
L2
L3
L1
L3
L2
L1
L2
L3
WARNING:
In Fig. 12 and 13 any one of the delta vertices may be earthed.
For the connection of CTs in medium or high voltage networks, follow the same procedure
described for low voltage connections.
4.3
CONNECTION OF THE AUXILIARY METERS
The instrument has two digital inputs to which two external meters can be connected (for
example, a water meter and a gas meter).
The digital inputs are optoisolated and internally power supplied (12 ÷ 18 VDC 1,3 KOhm)
and can count pulses with a maximum frequency of 100 Hz.
The connection must be carried out using cables with max. gauge 4 mm2 to be inserted in the
terminals indicated below in Fig.14.
Voltage signal connection with 3 VTs
Voltage signal connection with 2 VTs
Voltage signal connection with 2 VTs
English
Instructions
Voltage signal connection
Current signal connection
