Electrex KILO Instrucciones - Página 2

Navegue en línea o descargue pdf Instrucciones para Instrumentos de medida Electrex KILO. Electrex KILO 4 páginas.

Imprimir página

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).

Current signal connection

with 2 CTs (L1 and L2)

Fig. 7-1

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.

Connection of 2 CTs in Cogeneration mode

Fig. 8-1

4.2

CONNECTION ON UNBALANCED THREE-PHASE 4 WIRE NETWORKS

Voltage signal connection

Fig. 9

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

Voltage signal connection with 3 VTs

Fig. 11

ELECTREX S.r.l. via Claudia, 96 - 41096 Savignano s/P (MO) - Italy - Tel. +39.59.796372 Fax. +39.59.796378

Current signal connection

with 2 CTs (L1 and L3)

Fig. 7-2

Fig. 8-2

Current signal connection

Fig. 10

Voltage signal connection with 2 VTs

Fig. 12

SUBJECT TO CHANGE WITHOUT NOTICE

KILO

KILO M

Voltage signal connection with 2 VTs

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.

= Common

= Meter 1

= Meter 2

Connection to open-collector transistor

Connection to voltage-free

contacts

Min Pulse 5 mSec.

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

for the terminal connections (see Fig. 15).

Fig. 15

C = Common

NO = Normally Open

02/2004

Instructions

English

Fig. 13

Fig. 14

C 1 2

INSTRUMENT

INTERIOR

INSTRUMENT

ESTERIOR

C NO