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10
Electronic systems protection
Product selection guide
We’ve described in the ESP introduction how protection
should be installed on all cables which enter or leave the
building (except fibre optic), the power supply local to
important equipment and electronic equipment outside the
main building(s). With the aid of the illustration we can
see how this might be applied in practice.
Protect incoming and outgoing
electrical services
We’ll start by considering the main (office) building in isolation.
Incoming mains power supplies
Install protection on the incoming
mains power supply at the incoming
distribution board(s).
If, as in this example, there are any other
power supplies entering the building
install protection on these near where
they enter the building.
Incoming mains power supplies
Outgoing supplies can provide transient
overvoltages with a route back into the
building’s power distribution system.
Install protection on supplies to other
buildings. (Note how, if correctly
positioned, the protector at the incoming
distribution board (1), also protects
against transients from the outgoing
supply to the UPS building).
Install protection on outgoing supplies to
site services, such as CCTV systems
and site lighting. Protect all incoming/
outgoing data communication, signal and
telephone lines (unless fibre optic).
Telephone lines
Incoming telephone lines and extensions
that leave the building have protectors
installed on them at the PBXs
distribution frame.
In our example, there is a direct (i.e. not
via the PBX) telephone line to an alarm
panel, which also needs protecting.
Product selection guide - Electronic systems protection
No.
Type
Section
/ Page No.
1.
Mains wire-in protectors
11/4
2.
Mains wire-in protectors
11/8, 11/16
3.
Mains wire-in protectors
11/4
4.
Mains wire-in protectors
11/4
5.
PBX telephone/ISDN line protection
13/1
6.
Plug-in telephone line protection, or 13/14
Wire-in telephone line protection 12/4, 12/10
7.
CCTV video protectors
14/14
8.
Computer network protector
13/8
9.
RF signal protector
14/16
10.
Mains wire-in protector
11/8, 11/16
11.
Plug-in mains protector
11/24
12.
Protectors for low current mains power supplies 11/22
CCTV video and 12/14
Telemetry lines
14/14
13.
Mains wire-in protectors
11/14
14.
Mains wire-in protectors
11/14
Computer network protector
13/8
PBX telephone/ISDN line protection
13/6
Main aspects and individual components of a system of surge protection methods
2
9
10
1
13
13
2
1
3
4
5
6
11