
110
6LE007596Ad
Installation
17.13 Installation of the neutral protection accessories
For the installation of neutral protection accessories, refer to the following manuals:
Accessory
Manual
ENCT external neutral current sensor
6LE007514A
ENCT external neutral current sensor
The ENCT external neutral current sensor allows the circuit breaker to provide neutral
protection on a 3-pole circuit breaker in a TN earthing system.
It is installed on the neutral distribution bar generally located on the left of the circuit breaker. It
must be connected to the terminals marked ESP 4
th
S1 (black wire) and 4
th
S2 (red wire).
ATTENTION
Terminal block vN
If the 3-pole circuit breaker is equipped with the sentinel Energy
trip unit, it is also necessary to connect the vN terminal to the
neutral potential.
This connection is essential to obtain correct measurement of
phase-neutral voltages V1N, V2N, V3N, powers per phase and
for operation of the advanced protections against active power
feedback and undervoltage or overvoltage.