Page 121 - SACE Tmax XT - Catalogue

COMMUNICATION AND CONNECTIVITY 4/25

External neutral sensors

Ekip Dip
The external neutral current sensor (to protect the neutral conductor) is available for 3-pole cir-
cuit-breakers equipped with Ekip Dip LIG, Ekip Dip LSI, and Ekip Dip LSIG electronic trip units.
Ekip Touch 04
With this trip unit it is possible to use both current and voltage sensors (to measure or protect the
—
Current sensor for neutral conductor). The current sensor is available only for 3-pole circuit-breakers.
neutral conductor For the XT7 and XT7 M the current sensor is connected through the terminal box; moreover the voltage
outside the cicuit-
breaker connection can also be added to the terminal box area by just connecting a cable to the right connection
point. To use the external neutral with XT2-XT4, the cable supplied by default within the sensor must be
connected to the side part of the trip unit and the connection must be covered with the 4mm carter.
The current sensor available for XT2, XT4 and XT5 circuit-breakers is the version current + voltage, for
measuring of both values. It is always possible to select as loose part only the cables to be connected
to the trip unit. The sensors are available with the following nominal currents:
Circuit Breaker In Ekip Dip Ekip Touch
LIG LSI LSIG G-LS/I
XT2 10     -
25     -
40 - - - - 
63     
100     
160     
XT4 40     -
63     -
100     
160     
250     
XT5 250     
320     
400     
630     
XT6 630    
800    
1000    
XT7 630     
800     
1000     
— 1250     
Homopolar toroid 1600     
for the earthing
conductor of the
main power supply Homopolar toroid for the earthing conductor of the main power supply
The Ekip Touch trip units can be used with an external toroid positioned, for example, on the conductor
that connects the star center of the MV/LV transformer to earth (homopolar transformer): in this case,
the earth protection is called Source Ground Return. Four sizes of the toroid are available: 100A, 250A,
400A, 800A. The homopolar toroid is an alternative to the toroid for differential protection.
This is for the XT7 and XT7 M only.

Toroid for differential protection
Connected to the Ekip Touch trip units equipped with a rating plug for differential protection, this
— toroid enables earth fault currents of 3…30A to be monitored. This is an alternative to the homopolar
Toroid for differen-
tial protection toroid and should be installed on the busbar system. This is for the XT7 and XT7 M only.