E-Mon E-PS-S-HV-RTU - Manual (Page 27)

Chapter 2 Operating the
PowerSmart Socket PQM Operating the Fast Transient Recorder
PowerSmart Socket Power Quality Meter 27
Operating the Fast Transient Recorder
The fast transient recorder is provided with the optional
transient add-on module. It can detect impulsive and low
frequency oscillatory transient overvoltages with peaks up to
2kV and durations from 20 microseconds.
The recorder does not require any special setup above a
conventional PQ recorder setup for transient overvoltages.
Waveform log #3 is especially dedicated for fast transient
waveforms.
It automatically stores 1-cycle voltage
waveforms sampled at a rate of 1024 samples/cycle
whenever a transient overvoltage is detected.
Unlike a basic transient recorder provided with the
PowerSmart Socket PQM that detects and records transient
voltages between phase conductors and a neutral terminal (in
4LN3 and 3LN3 configurations), or between two phase
conductors (in line-to-line configurations), the fast transient
recorder
detects transient voltages between phase
conductors and a ground terminal and between the neutral
and a ground terminal regardless of a wiring configuration.
See the PowerSmart Socket PQM Installation Manual for the
terminal location and wiring diagrams. To help you check
your voltage connections, the PowerSmart Socket PQM
provides 1-cycle phase RMS voltages V1x through V3x, and
1-cycle neutral voltage V4x relative to the ground terminal,
that you can monitor via Power Software.
Operating the Fault Recorder
The programmable Fault recorder stores time-tagged fault
events into the fault event report. It can be triggered
externally through a digital input or internally from the
embedded fault detector.
The fault detector can automatically detect different fault
categories using the meter sub-cycle measurements. Fault
triggers have programmable thresholds and hysteresis and
can be adjusted for specific substation conditions.
The Fault recorder is programmable for triggering the
Waveform recorder to record fault voltage and current
waveforms before, within and after a fault event, and can
trigger the Data recorder for fast profiling of RMS voltages
and currents during a fault.
See Configuring the Fault Recorder in Chapter 5 for more
information on operation of the Fault recorder.
Communicating with the PowerSmart Socket PQM
Communication with the PowerSmart Socket PQM is provided
either via the embedded optical IR and RS-485 ports, or via
the expansion communication ports. See the PowerSmart
Socket PQM Installation Manual for a full list of available
communication options and connection diagrams.