Liebert UPS System - Manual (Page 115)

Chapter 9 Optional Parts
109
9.7.1 Introduction of SPD24Z
The SPD24Z lightning protection box has a switch(3) on its panel, a lightning
protection indicator(green, 1) and fault indicator（red,2）. Its top cover has 3 holes
for cable input（I～III） and its bottom has 3 holes for cable output. Its rear side
has two holes for fixing the device, as shown in 9-7.
Top
Panel
Back
Figure 9-7 Outline of SPD24Z
9.7.2 Installation procedures of SPD24Z
Procedures:
a. Use too expansive bolts smaller than Φ10 to fix the lightning protection box on
the wall through fixing holes;
b. The cross sectional area of input and output cables of the lightning protection
box should be at least 6mm and copper-core cables are recommended to be
used;
c. The cooper-core cable with 10mm cross sectional area should be used for
protective earth cable（PE cable）, and the minimum area should be at least
6mm;
d. Th earthing resistance should be less than 5 ohm;
e. The SPD24Z should be fixed in proper location in the room. The AC power
cable between the lightning protection device and the equipment should be 5～
10m;
f. Open the panel of the lightning protection box, wire according to the figure
printed on the rear side of the panel and Fig 9-8;
g. Switch on the circuit breaker after confirming that all the cables are well
connected. Check whether the green indicator illuminates. The red indicator
should turn on if the circuit breaker is switched off.