Electrical Installation; Lightning Protection - ABB Relion 670 Series Installation Manual

Section 6
Connecting
IEC99001046 V1 EN-US
Figure 52: Antenna line-of-sight
6.5.2

Electrical installation

Use a 50 ohm coaxial cable with a male TNC connector on the antenna end and a male SMA
connector on the receiver end to connect the antenna to the IED. Choose cable type and length so
that the total attenuation is max. 26 dB at 1.6 GHz. A suitable antenna cable is supplied with the
antenna.
The antenna has a female TNC connector to the antenna cable. For location of GPS time module
(GTM), refer to section
6.5.3

Lightning protection

The antenna should be mounted with adequate lightning protection, that is the antenna mast
must not rise above a neighboring lightning conductor.
74
"Rear side connectors". Connection diagram for GTM is shown in figure 19.
Make sure that the antenna cable is not charged when connected to the antenna or
to the receiver. Short-circuit the end of the antenna cable with some metal device,
then connect to the antenna. When the antenna is connected to the cable, connect
the cable to the receiver. The IED must be switched off when the antenna cable is
connected.
A
99001046.vsd
GUID-596EE08A-2D55-4EEA-B710-C11DC1E19C9B v1
1MRK 514 026-UUS F
M12267-34 v4
670 series
Installation manual