User's Manual

6-1
6 Grounding System Installation
 Summary:
z Overview of BTSB grounding system installation
z Installation procedure of the BTSB grounding system
6.1 Grounding System Overview
This section describes the grounding of the BTSB equipment and the installation of the
grounding device accessories required for the BTSB installation. It covers the
installation of the grounding copper bar, the feeder grounding clip and the lightning
arrester.
The purpose of grounding is to ensure the safety of human body and equipment and to
improve the capability of the equipment to resist electromagnetic interference.
The grounding system consists of indoor part, outdoor part and underground ground
grid of the building.
As to the engineering, the user is responsible for the basic ground grid construction of
the grounding system, the grounding engineering of the iron tower and the building,
and the provision of the connecting point for the indoor and the outdoor grounding
copper bars to connect the ground grid via separate 50 mm2 wires, as shown in Fig.
6.1-1.
The wire of the indoor rack protection ground (PGND) is connected to the indoor
grounding copper bar.
The wire of the BTSB rack working ground (–48VGND) is connected to the working
ground terminal of the BTSB DC power rack.
To ground the lightning arrester, connect it to the outdoor grounding copper bar with a
wire. To ground the feeder, connect each feeder to the outdoor grounding copper bar
through a grounding clip before it enters the equipment room. This is shown in Fig.
6.1-1.