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Disturbance Records
Waveform records provide network administrators important information where supply problems or
protection errors occur frequently, protection settings convenience needs to be checked or fault
characteristics are to be evaluated in detail. DEMA CPM 311 presents the users this powerful tool with
the following characteristics.
Max. Waveform Records Quantity
5 records
Waveform Record Duration
3 s
Waveform Record Time Structure
0.4 s before trigger
2.6 s after trigger
Measurement Method
RMS current
Monitoring
DigiConnect PC program
Recording Triggers
Recording triggered either automatically by threshold triggers or
manually/semi-automatically via an input with S
tart Waveform
Recording
appointed.
Waveform records are presented as long duration and high resolution graphics therefore cannot be
visualized on the graphics display, DigiConnect PC program needs to be utilized instead.
As seen on the picture above, the initial window of waveform record controls brings up two options.
•
The first option is to download and display waveform records from CPM 311 memory, using the
Download from Device
button.
The alternative option is to locate and download saved waveform record archive files from the local
disc. Waveform records can be saved to and reloaded from the local PC hard drives as .dsk format
archive files.
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Summary of Contents for CPM 311
Page 1: ......
Page 9: ... 9 INTRODUCTION ...
Page 31: ... 31 PACKING LABELING INFORMATION ...
Page 33: ... 33 OPERATING MANUAL ...
Page 49: ... 49 RELAY MENUS MANUAL ...
Page 51: ... 51 The Menu Tree ...
Page 52: ... 52 ...
Page 53: ... 53 ...
Page 54: ... 54 ...
Page 55: ... 55 ...
Page 56: ... 56 ...
Page 57: ... 57 ...
Page 124: ... 124 DIGICONNECT PC PROGRAM MANUAL ...
Page 181: ... 181 APPLICATION DIAGRAMS ...
Page 183: ... 183 Sample Power Transformer Protection Application Diagram ...
Page 185: ... 185 FUNDAMENTAL CABLING DIAGRAM ...
Page 195: ... 195 APPLICATION DIAGRAM NO 10 Function Function Activation Address RS485 Connection Settings ...
Page 196: ... 196 TECHNICAL DATA ...
Page 208: ... 208 GLOSSARY ...