Alstom EPAC 3100, Installer'S Manual, Page: 41 / 60

5-3
GI 1.6882 EPAC 3100/3500
5.1. ANALOG INPUT CONNECTIONS
The current and voltage inputs are wired to pins 1 to 28 of the X5 connector on the EPAC rear
panel as indicated in figure 5.1a.
To maintain suitable EMC Electro-Magnetic-Compatibility margins provided with this product,
a state-of-art wiring and grounding is required.
We recommend the use of one multiwire (4 to 8 depending on the number of inputs used and
external neutral connection) cable of 4 mm
2
for the voltage circuit and one multiwire (4 to 8
depending on external neutral connection) câble of 4 mm 2 for 1 A current circuit or 6 mm 2 for
5A current.
The external diameter of the cables is recommended as less than 15 mm. If the cables are
connected to cubicle terminals no shielding is required. If the cables are going out, cubicle
shielding of low HF impedance copper is to be provided with short strip large cross section
connections to ground at both ends. Unused wires are to be grounded at both ends.
As far as possible avoid mixing the voltage and current wires and other groups of wires.
The following diagrams show the analog input connections for the different types of zero
sequence current acquisition.