GridSense Line IQ LIQ60, User Manual, Page: 10 / 39

File: LIQ User Manual V2.0
Page 8 of 37
2.1 Glossary
Term Meaning
CMS Conductor Mounted Sensor which detects events on a conductor and logs voltage, current
and temperature for periodic downloading. The LIQ-60 is a CMS.
Commission Putting equipment into use for the first time. Follows after c o n f i g u r a t i o n .
Configure The process of setting up equipment to perform a designated task. In this manual refers
mainly to firmware. Follows after set-up.
DPF Displacement Power Factor. A measure of the phase difference between the voltage and
current. { DPF=cos(
φ
) } Ideally
φ
should be 0 degrees, so DPF = 1.
DTS Date & Time Stamping
Event
Profile
Recording
Period The time (e.g. 1 minute) after an event has been detected and during which the LT-60 records
current and power profiles.
Fast Filter A 5 sec. average value filter, applies to both current (I) and voltage (V).
FP Fault Path: a high current event
HV High Voltage
IED Intelligent Electronic Device
LED Light Emitting Diode
LI Long Interruption: a loss of power on a conductor for at least one m inute.
LIQ-
Gateway The Pole Attached Collator, which receives and collates data from CMS
LIQ-LAN A local area network consisting of a PC (Laptop) with LIQ-LocalLink for communications, an
LIQ-Gateway & its associated LIQ-60.
LIQ-
LocalLink A USB-based radio. Used for communications between a PC and the LIQ-Gateway and LIQ-
60s in an LIQ-LAN.
Loss of
volts When a CMS detects no voltage on the conductor.
LV Low Voltage
ms milliseconds
Permanen
t Fault Fault detection with loss of supply detected after the end of the event profile recording period.
PMS Pole Mounted Sensor (as distinct from a CMS).
P-P
Peak to Peak. A measure of a waveform’s amplitude (absolute, unlike RMS) P-P 2.38V
RMS
PR Power Return: return of power after a Long Interruption (LI).
PRT Platinum Resistance Thermometer. Two are mounted in each LIQ-60 to measure conductor
and ambient temperature.