8. Technical data
8.1 Technical data
Sensor/Transceiver
Data Communication
Type
AM radio (OOK)
ETSI and FCC
approved
Frequency
868.35 MHz or
916.50 MHz
Antenna
Integrated on circuit-
board. Optional hand-
held external.
Output power -3dBm (0.75 mW)
Operation range (max.)
Environment
dependent
up to 60 m (120 m
with external antenna)
Required system conditions for stable
communication
System voltage
0.4 to 0.9 p.u. arres-
ter Ur
Third harmonic con-
tent in system voltage
Max 3%
Field probe current 3 - 190 µA
peak
Leakage current 0.2 - 12 mA
peak
Radio interference
at communication
frequency
Below -97 dBm
Ambient temperature -10 to +60 °C
Surge counting
Counting threshold
(8/20 µs)
10 A
Surge current amp-
litude classification
(8/20 µs)
10–99 A
100-999 A
1000-4999 A
5000-9999 A
> 10 000 A
Error in surge coun-
ting amplitude
< 20%
Surge counting time
resolution
< 0.5 s
Surge counting time
stamp format
YYYY:MM:DD:
hhmmss
(1 s resolution)
Surge counting
memory capacity
1000 registrations
(wrap-around)
Leakage Current Measurement
Measuring range of
total leakage
current (peak value)
0.2 – 12 mA
Error in total leakage
current
< 5%
Optional
Measuring range of
resistive leakage cur-
rent (peak value)
10 – 2000 µA
Error in resistive
leakage current
< 10 µA (10 – 50 µA);
< 20% (50 – 2000 µA
Required arrester condition during leakage current measurement
Transient leakage currents can affect the measurements made. To ensure both
stable readings and the best possible consistency for comparison between measu-
red values, leakage current measurements should not be made while it is raining or
otherwise when large external leakage currents can be expected to flow on the hou-
sing. This is less of an issue for arresters with silicone housings, since such external
leakage currents are lower.
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