ABB Relion 670 series, Installation And Commissioning Manual, Page: 91 / 260

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99001046.vsd
IEC99001046 V1 EN
Figure 57: Antenna line-of-sight
5.8.2 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
"Rear side connectors" . Connection diagram
for GTM is shown in figure 26 .
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.
5.8.3 Lightning protection
The antenna should be mounted with adequate lightning protection, that is the
antenna mast must not rise above a neighboring lightning conductor.
1MRK 502 029-UEN A
Section 5
Installing the IED
85
Installation and commissioning manual