108 Chapter 7 Parallel System And LBS System
Liebert EXM 80kVA ~ 200kVA UPS User Manual
7.4.3
Power Cable
The power cable of dual-bus power system is similar to that of single system. Refer to
The bypass and rectifier input supplies must use the same neutral line input terminal. If the input has a
current leakage protective device, the current leakage protective device must be fitted upstream of the
neutral line input terminal
.
7.4.4
LBS Cable
For 80kVA ~ 200kVA dual bus system, connect the optional LBS cables (10m, 15m, 20m) between the LBS
ports (J19) of the two UPS systems shown in Figure 7-7 to Figure 7-8. The J19 ports are provided on the
front panel of the bypass module, as shown in Figure 7-9.
Note
You must use the shortest LBS cable to suit the application and must not coil excess. Meanwhile, separate the LBS
cable from the power cables to prevent electrical inteferences.
UPS 1
PARA 1
PARA 2
LBS 1
LBS 2
UPS 2
PARA 1
PARA 2
LBS 1
LBS 2
LBS
电 缆
LBS cable
UPS 1
LBS 1
LBS 2
PARA 1
PARA 2
UPS 2
LBS 1
LBS 2
PARA 1
PARA 2
Figure 7-7 Connection of typical LBS system (UPS module)
UPS 1
PARA 1
PARA 2
LBS 1
LBS 2
UPS 2
PARA 1
PARA 2
LBS 1
LBS 2
UPS 3
PARA 1
PARA 2
LBS 1
LBS 2
UPS 4
PARA 1
PARA 2
LBS 1
LBS 2
并 机电 缆
并 机 电 缆
LBS
电 缆
UPS 1
LBS 1
LBS 2
PARA 1
PARA 2
UPS 2
LBS 1
LBS 2
PARA 1
PARA 2
UPS 3
LBS 1
LBS 2
PARA 1
PARA 2
UPS 4
LBS 1
LBS 2
PARA 1
PARA 2
LBS cable
Parallel cable
Parallel cable
Figure 7-8 Connection of typical LBS system (parallel system)
J19
Figure 7-9 LBS port (J19) on bypass module
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