GE Pqm 2 Manual

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PQMII POWER QUALITY METER  – INSTRUCTION MANUAL4–11
4.4 Using the EnerVista PQMII Setup Software
4.4.1 Entering Setpoints
The System Setup page will be used as an example to illustrate the entering of setpoints.
Select the Setpoint > System Setup menu item. The following window 
will appear:
When a non-numeric setpoint such as 
CT WIRING is selected, EnerVista PQMII Setup 
Software displays a drop-down menu:
When a numeric setpoint such as 
PHASE CT PRIMARY is selected, EnerVista PQMII 
Setup Software displays a keypad that allows the user to enter a value within the 
setpoint range displayed near the top of the keypad:
Click Accept to exit from the keypad and keep the new value. Click on 
Cancel to exit from the keypad and retain the old value.
In the Setpoint / System Setup dialog box, click on Store to save the 
values into the PQMII. 
Click OK to accept any changes and exit the window. 
Click Cancel to retain previous values and exit. 
						

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4.4.2 Viewing Actual Values
If a PQMII is connected to a computer via the serial port , any measured value, status and 
alarm information can be displayed. Use the Actual pull-down menu to select various 
measured value screens. Monitored values will be displayed and continuously updated.
4.4.3 Setpoint Files
To print and save all the setpoints to a f ile follow the steps outlined in 4.3.2: Saving 
Setpoints to a File.
To load an existing setpoints f ile to a PQMII and/or send the setpoints to the PQMII follow 
the steps outlined in 4.3.4: Loading Saved Setpoints.
4.4.4 Getting Help
A detailed Help f ile is included with the EnerVista PQMII Setup Software.
Select the Help > Contents menu item to obtain an explanation of any feature, 
specif ications, setpoint , actual value, etc. Context-sensitive help can also be activated by 
clicking on the desired function.
For easy reference, any topic can be printed by selecting File > Print Topic item from the 
Help f ile menu bar. 
						

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4.5 Power Analysis
4.5.1 Waveform Capture
Two cycles (64 samples/cycle) of voltage and current waveforms can be captured and 
displayed on a PC using the EnerVista PQMII Setup Software or third party software. 
Distorted peaks or notches from SCR switching provides clues for taking corrective action. 
Waveform capture is also a useful tool when investigating possible wiring problems due to 
its ability to display the phase relationship of the various inputs. The waveform capture 
feature is implemented into EnerVista PQMII Setup Software as shown below.
Select the Actual > Power Analysis > Waveform Capture menu item. The EnerVista PQMII 
Setup Software will open the Waveform Capture dialog box.
Select the buttons on the left to display the desired waveforms. The waveform values for 
the current cursor line position are displayed to the right of the selected buttons. 
Numerical values are displayed directly below the button.
4.5.2 Harmonic Analysis
Non-linear loads such as variable speed drives, computers, and electronic ballasts can 
cause harmonics which may lead to problems such as nuisance breaker tripping, 
telephone interference, transformer, capacitor or motor overheating. For fault diagnosis 
such as detecting undersized neutral wiring, need for a harmonic rated transformer or 
effectiveness of harmonic f ilters; details of the harmonic spectrum are useful and available 
with the PQMII and the EnerVista PQMII Setup Software.
The EnerVista PQMII Setup Software can perform a harmonic analysis on any of the four 
current inputs or any of the three voltage inputs by placing the PQMII in a high speed 
sampling mode (256 samples/cycle) where it will sample one cycle of the user def ined  
						

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parameter. EnerVista PQMII Setup Software then takes this data and performs a FFT (Fast 
Fourier Transform) to extract the harmonic information. The harmonic analysis feature is 
implemented into EnerVista PQMII Setup Software as shown below.
Select the Actual > Power Analysis > Harmonic Analysis > 
Harmonic Spectrum menu item. 
The EnerVista PQMII Setup Software can display the Harmonic 
Analysis Spectrum window including the harmonic spectrum up to and 
including the 62nd harmonic.
Enter the trigger parameter for the Select Trigger setting.
Click the Select button for the Trigger setting.
The Waveform capture window will appear. 
To display the harmonic spectrum, click the Harmonics button ( ) 
on the top of the screen.
FIGURE 4–3: Harmonic Spectrum Display
The window includes details of the currently selected harmonic and other 
harmonic analysis-related data (for example, THD, K Factor, etc.). 
Select Read Last Trigger From Device to load previous acquired 
spectra from the PQMII.
4.5.3 Trace Memory
The trace memory feature allows the PQMII to be setup to trigger on various conditions. 
The trace memory can record maximum of 36 cycles of data (16 samples per cycle) for all 
voltage and current inputs simultaneously. A Total Trace Triggers Counter has been 
implemented in the PQMII Memory Map at Register 0x0B83. This register will keep a  
						

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running total of all valid Trace Memory Triggers from the last time power was applied to 
the PQMII. The Total Trace Triggers counter will rollover to 0 at 65536. The trace memory 
feature is implemented into the EnerVista PQMII Setup Software as shown below.
Select the Setpoint > PQMII Setup > Trace Memory Setup menu 
item to setup the trace memory feature.
The Trace Memory Usage parameter is set as follows:
• 1 x 36 cycles: upon trigger, the entire buffer is f illed with 36 cycles of data
• 2 x 18 cycles: 2 separate 18-cycle buffers are created and each is f illed upon a 
trigger
• 3 x 12 cycles: 3 separate 12 cycle buffers are created and each is f illed upon a 
trigger
If the Trace Memory Trigger Mode is set to “One-Shot”, then the trace memory is triggered 
once per buffer; if it is set to “Retrigger ”, then it automatically retriggers and overwrites the 
previous data.
The Trace Memory Trigger Delay delays the trigger by the number of cycles specif ied. The 
Voltage, Current , and Switch Inputs selections are the parameters and levels that are used 
to trigger the trace memory. Clicking Save sends the current settings to the PQMII. 
						

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Select the Actual > Power Analysis > Trace Memory menu item to 
view the trace memory data. 
This launches the Trace Memory Waveform window.
4.5.4 Data Logger
The data logger feature allows the PQMII to continuously log various specif ied parameters 
at the specif ied rate. The data logger uses the 64 samples/cycle data. This feature is 
implemented into EnerVista PQMII Setup Software as shown below.
Select the Setpoint > System Setup > Data Log menu item to setup the 
data logger feature. 
This launches the Data Log settings box shown below. The state of each 
data logger and percent filled is shown. 
Use the Start Log 1(2) and Stop Log 1(2) buttons to start and stop the 
logs. 
						

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FIGURE 4–4: Data Logger Setup Window
1. The Log 1(2) Mode parameters are set as follows:
• “Run to Fill”: when the data logger is full (100%) it will stop logging
• “Circulate”: when the data logger is full, it will start from the beginning 
and overwrite the previous data.
2. The Log 1(2) Interval parameters determine how frequently the PQMII logs 
each piece of data.
3. The total log size is approximately 192KB. The allotment of this memory can 
be varied between the two logs to maximize the overall log time. Set the Log 
Size Determination to let the PQMII automatically optimize the memory. If 
desired, the optimization can also be performed manually by the user.
4. The Log 1(2) Fill Time parameters represent the amount of time the data 
logger takes to f ill to 100%. This time is dependent on the logging interval and 
the number of parameters being logged.
Set the parameters to be logged by setting the various Log Assignment 
parameters to the desired log.
Select the Actual > Power Analysis > Data Logger > Log 1 (or Log 2) 
item to view the respective data logger. 
						

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FIGURE 4–5: Data Logger Window
5. The Data Log 1(2) dialog box displays the record numbers, data log start time, 
the current time, and parameter values for the current cursor line position.
4.5.5 Voltage Disturbance Recorder
The Voltage Disturbance Recorder allows the PQMII to monitor and record sag and swell 
disturbances. This function can record up to 500 sag/swell events for all voltages 
simultaneously. The events roll-over and old events are lost when more than 500 events 
are recorded.
NotePQMII VDR events are stored in volatile memory. Therefore, all voltage disturbance 
events will be cleared when control power is cycled to the meter.
The operation of the voltage disturbance recorder as implemented in the EnerVista PQMII 
Setup Software is shown below:
Select the Setpoint > System Setup > System Config menu item.
Select the Voltage Disturbance Recorder Setup tab.
The Sag Level % Nominal should be set to the level to which a voltage 
input must fall before a sag event is to be recorded. The Swell 
Level % Nominal should be set to the level to which a voltage input 
must rise before a swell event is to be recorded.
Click Save to send the current settings to the PQMII. 
						

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Select the Actual > Power Analysis > Voltage Disturbance Recorder 
menu item to view the voltage disturbance recorder events.
Within the voltage disturbance recorder window, each event is listed and can be selected. 
When the event is selected the following values are displayed:
•Dist . Number: The event number. The f irst event recorded (after the event recorder 
is cleared) will be given the event number of “1”. Each subsequent event will be 
given an incrementing event number. If the event number reaches 65535, the 
event number will rollover back to 1.
•Dist . Type: The type refers to the classif ication of the event (i.e. Sag, Swell, 
Undervoltage or, Overvoltage)
•Dist . Source: The source of the disturbance is the line/phase voltage that the 
disturbance was measured on.
•Dist . Time/Date: The time that the disturbance was recorded. Each disturbance is 
recorded at the end of the disturbance event .
•Dist . Dur.: The duration of the event in cycles.
•Dist . Average Voltage: The average RMS voltage recorded during the disturbance.
The Clear Events button clears the voltage disturbance recorder. Events are overwritten 
when the event recorder reaches 500 events.
The Save button exports the events to a CSV format f ile. A text file viewer can open and 
read the f ile. 
						

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FIGURE 4–6: Voltage Disturbance Recorder