24 Chapter 3 Installation
NetSure 801 AG1 Power Supply System User Manual
Earth terminal of
the rectifier rack
Earth terminal of the DC
distribution cabinet
DC positive busbar
DC positive busbar
of the rectifier rack
Figure 3-8 Earth terminal of the rectifier cabinet and the DC distribution cabinet
2. Lead out the DC earth cable from the positive busbar of the DC distribution cabinet, and connect it to the earth bar
in the equipment room. If only configuration the rectifier cabinet, connected the earth cable to the positive busbar of
the rectifier and earth bar in the equipment room. The sectional area of the earth cable increases with system
capacity, and should be at least 95mm
2
.
3.3.2 Connecting AC Input Cables
Connection requirements
1. The AC in cables are wired from the distribution switch, and connected to the output terminal when the power is to
be switched on. The AC input is fitted with overcurrent, short circuit and lightning protection devices. The capacity of
the distribution switch should be no less than 1.5 ~ 2 times of the load capacity.
2. The yellow, green, red, and light blue AC cables correspond respectively to the AC phase A, B, C and neutral lines.
If the cables are the same color, they should be numbered or identified with insulating tape of different colors at both
cable ends.
3. The sectional area of the corresponding AC input cable is 25mm
2
~ 35mm
2
. The width of the cable terminal should
be not larger than 22mm, as shown in Figure 3-9.
22
Figure 3-9 AC input terminal dimension (unit: mm)
4. The AC cables should be run separate from the DC cables, with separation exceeding 150mm.
5. No splice, damage, or scratch on the cables is permitted.
