Lightning And Over-Voltage Protection; Figure 5: Earthing And Power Supply Terminals Of The Fox615 Subrack - ABB FOX615 Installation & User Manual

2.3.2

Lightning and over-voltage protection


FOX615 Installation
Figure 5: Earthing and power supply terminals of the FOX615 sub-
rack
Legend:
1 Subrack power interface connecting
- 2 x 0-volt
- 2 x U (-48/-60 V
T
2 Possible earthing / bonding terminals (6 mm screws)
The FOX units provide secondary over-voltage protection for their inter-
faces in cooperation with external equipment.
The primary protection (as required for lightning protection) is implemented
external to the FOX615, normally at the connection points of the signal
cables to the outside world. Depending on the units and interfaces, the
implementation of gas discharge tubes at the external connection point is
suitable for providing such protection.
P R E P A R I N G F O R I N S T A L L A T I O N
1
)
DC
2
21