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Chapter 6 Main Antenna Feeder System Installation

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The installation location of the antenna must be provided with
good lightning protection, as shown in Figure 32.

I G U R E

3 2

N T E N N A

I G H T N I N G

R O T E C T I O N

C H E M A T I C

I A G R A M

２

４

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1. Lightning rod 2. 45°protection angle 3. Antenna 4. Grounding cable

The installation requirements are as follows:

The antenna must be installed within the 45° protection
angle of the existing lightning rod;

Where necessary, the antenna pole must be provided with a
separate lightning rod, which must be grounded reliably.

Antenna Handling and Hoisting

Caution:

The personnel on and under the tower must work together to

hoist the antenna. During the hoisting process, the personnel under the

tower must pull the antenna away from the tower body by pulling the

rope, to avoid the crash between the antenna and the tower body.

In the case the antenna is to be mounted on the tower, use
the rope and pulley block to hoist the antenna, the jumper
and all the accessories (such as tools, safety belts, adhesive
tapes and cable ties) to the tower-top platform and place
them in a safe place. Take appropriate safety measures
during the process. Small objects must be put into the
canvas bag before they can be hoisted.

Knots must be tied at both ends of the antenna during
hoisting, so that the personnel on the tower and those under
the tower can work together, as shown in Figure 33.