GridSense Line IQ LIQ60, User Manual, Page: 13 / 39

000-2166 Rev 3.0 Franklin Grid Solutions LLC
Page 11 of 37
Figure 2: The LIQ-60 Conductor Mounted Sensor.
The LIQ-60 is installed live on a bare overhead conductor and detects and logs disturbance events such
as fault currents or loss and return of voltage.
Each event is date and time stamped (DTS) and recorded to non-volatile memory for later analysis. High
intensity LEDs are provided to indicate line and fault status to maintenance crews.
The LIQ-60 can be configured to calculate and store time-averaged load current, i.e. load logging. The
Log Average interval can be selected in the range from 2 to 60 minutes. Ambient and conductor
temperatures are also recorded at the same Log Average interval.
The LIQ-60 can also measure and record Displacement Power Factor (DPF) values at the Log Average
interval.
This logged information is downloaded on demand to an LIQ-Gateway unit which periodically requests
data from all the LIQ-60s that are part of its LIQ-LAN
.
2.4.1 LIQ-60 Design
The LIQ-60 uses a sprung clamp to attach to bare conductors between 5mm (
3
/
16
“) and 32mm (1¼ “) in
diameter. It is designed to be mounted on the line by using a shotgun-style
“hot stick” as commonly used
by electric utilities.
The LIQ-60 is powered by a sealed lead acid battery which provides continuous long term power for
remote reporting of events and historic load data. A solar panel mounted on top of the LIQ-60 charges
the battery.