Chapter 2 - Installation Preparations
Chapter 2 - Installation Preparations
Confidential and Proprietary Information of
Confidential and Proprietary Information of ZTE CORPORATION
ZTE CORPORATION
9
9
Note:
Note:
Level 1 arrester is also
Level 1 arrester is also
called level B arrester.
called level B arrester.
Level B arrester should be purchased by the user.
Level B arrester should be purchased by the user.
It is recommended to install the arrester before the UPS input with a
It is recommended to install the arrester before the UPS input with a
distance greater than or equal to 12 m. The cable between level B
distance greater than or equal to 12 m. The cable between level B
arrester and the AC distribution unit should be indoor; to protect it
arrester and the AC distribution unit should be indoor; to protect it
from direct lightning. The cross-sectional area of
from direct lightning. The cross-sectional area of
the cable connected
the cable connected
to the arrester should be greater than or equal to 6 mm
to the arrester should be greater than or equal to 6 mm
2
2
; the cable
; the cable
should be as short as possible. The requirements for grounding the
should be as short as possible. The requirements for grounding the
arrester cable are similar to the requirements for grounding other
arrester cable are similar to the requirements for grounding other
cables.
cables.
Figure 2
Figure 2
shows the lightning protection measures for the AC input
shows the lightning protection measures for the AC input
terminal. The UPS has an EMI filter and lightning protection In both,
terminal. The UPS has an EMI filter and lightning protection In both,
the invert mode and the bypass mode.
the invert mode and the bypass mode.
F
F
I G U R E
I G U R E
2
2
L
L
I G H T N I N G
I G H T N I N G
P
P
R O T E C T I O N
R O T E C T I O N
M
M
E A S U R E S F O R T H E
E A S U R E S F O R T H E
A
A
C
C
I
I
N P U T
N P U T
E
E
N
N
D
D
Level 1 arrester
Level 1 arrester
Input EMI board
Input EMI board
Lightning-proof
Lightning-proof
circuit
circuit
ZXUPS
ZXUPS
Grounding
Grounding
terminal
terminal
Input & output
Input & output
connector bar
connector bar
Equipment room
Equipment room
grounding busbar
grounding busbar
Grounding
Grounding
cable of the
cable of the
UPS
UPS
Input AC (Single-phase three-wire)
Input AC (Single-phase three-wire)
L
L
N
N
PE
PE
Grounding
Grounding
cable of the
cable of the
arrester
arrester
