Liebert UPS System - Manual (Page 116)

Chapter 9 Optional Parts
110
h. Check whether the cables are well connected.
i. Use a 4mm 2 cable to earth the lightning protection device.
j. Close the cover.
Note
1. All operations should be done with power off and confirm there is no dangerous
voltage on the neutral line
。
2. Connect two pieces of PE cables from the lightning protection device. One cable
is connected to the case of the UPS, the other one is connected to earth
（shorter
than 30m, as short as possible ）.
3. After installation, switch on the circuit breaker of the lightning protection device,
then the device is in normal operation state. If the circuit breaker is switched off,
there will be no lightning protection functions. The circuit breaker is prohibited to be
switched off during normal operation of the lightning protection device
。
M
User
Equipment
Protection Earth
earthing
bus bar
Fixing holes
lightning
protection box
circuit breaker
capper bar
wiring diagram
Fig. 9-8 SPD24Z wiring