Chapter 3 Installation 25
NetSure 801 AG1 Power Supply System User Manual
Connection procedures
The AC cables can enter the system from either the cabinet top from wiring rack or the cabinet bottom from cable
trenching. Only rectifier cabinets used together with PD48/2000DD DC distribution cabinet can use bottom cabling
method to lead in AC cables. The cable connection procedures are described below:
1. Remove the fixing screws of the AC input box cover, and remove the cover, as shown in Figure 3-10.
Fixing screw of
the cover
Fixing screw of
the cover
AC input box cover
Fixing screw of
the cover
AC input box
Fixing screw of
the cover
Figure 3-10 Removing the AC input box cover
2. The AC cables are connected to the AC input terminals through the cable tubes, as shown in Figure 3-11. One
three- phase five- line 5- core cable (3L + N + PE) or three- phase four- line 4- core cable (3L + PE) can be fed into
each cable tube. The phase of the cable should be in accordance with the phase of the AC input terminals.
Cable tube
AC input terminal
Figure 3-11 AC cable connection
3.3.3 Connecting DC Load Cables
The connection method of DC load cable connected to the rectifier cabinet and that of DC load cable connected to
the DC distribution cabinet are the same. Taking the DC distribution cabinet for example, the connection procedures
are described below:
1. Select the cable length and section according to the actual wiring route and load capacity. The positive and
negative cables of the load should be obviously distinguished with different colors. Generally, the positive cable is
black and the negative cable is blue. If the cables are the same color, they should be numbered or identified with
insulating tape of different colors at both cable ends.
2. Add cable lugs to both ends of the cables.
3. Select the DC output branch that matches the load capacity.
Load should be connected to the MCB/fuse of suitable capacity to avoid their failure to function in the case of
overload. The capacity of the MCB/fuse is recommended to be about 1.5 ~ 2 times of the peak value of the load
capacity.
