Installation Instruction
26 Modular UPS 25KVA~900KVA User Manual
Output
Cables crimped
OT terminal
M12 13mm 22Nm
PE
Cables crimped
OT terminal
M12 13mm 22Nm
20-slot cabinet
Main Input
Cables crimped
OT terminal
M16 17mm 96Nm
Bypass Input
Cables crimped
OT terminal
M16 17mm 96Nm
Battery
Cables crimped
OT terminal
M16 17mm 96Nm
Output
Cables crimped
OT terminal
M16 17mm 96Nm
PE
Cables crimped
OT terminal
M12 13mm 22Nm
3.6.3 Circuit Breaker
The circuit breakers (CB) for the system are recommended in Table 3.4.
Table 3.4 Recommended CB
Installed position
6-slot cabinet
10-slot cabinet
20-slot cabinet
Input CB
300A/3P 600A/3P /
Bypass Input CB
250A/3P 500A/3P /
Output CB
250A/3P 500A/3P /
Battery CB
400A,500Vdc 800A,500Vdc
1250A,500Vdc
For the 20-slot cabinet, the Main Input, Bypass Input and Output CB are installed in
the Cabinet.
Attention
The CB with RCD (Residual Current Device) is not suggested for the system.
3.6.4 Connecting Power Cables
The steps of connecting power cables are as follows:
1.
Verify that all the external input distribution switches of the UPS are completely
open and the UPS internal maintenance bypass switch is opened. Attach necessary
warning signs to these switches to prevent unauthorized operation.
2.
Open the back door of the cabinet, remove the plastic cover. The input and output
terminal, battery terminal and protective earth terminal are shown in Fig.3-13,
Fig.3-14, and Fig.3-15.
PE
Output
Main Input
BAT
-
N
+
N
C
B
A
N
C
B
A
A
B
C
N
BYP Input
Fig.3-13 6-slot
connections terminals
