5 MEASUREMENTS AND RECORDING
5.1 GENERAL
General Measurement Accuracy
General measurement accuracy Typically +/- 1%, but +/- 0.5% between 0.2 - 2 In/Vn
Phase 0° to 360° +/- 0.5%
Current (0.05 to 3 In) +/- 1.0% of reading, or 4mA (1A input), or 20mA (5A input)
Voltage (0.05 to 2 Vn) +/- 1.0% of reading
Frequency (45 to 65 Hz) +/- 0.025 Hz
Power (W) (0.2 to 2 Vn and 0.05 to 3 In) +/- 5.0% of reading at unity power factor
Reactive power (Vars) (0.2 to 2 Vn and 0.05 to 3 In) +/- 5.0% of reading at zero power factor
Apparent power (VA) (0.2 to 2 Vn and 0.05 to 3 In) +/- 5.0% of reading
Energy (Wh) (0.2 to 2 Vn and 0.2 to 3 In) +/- 5.0% of reading at unity power factor
Energy (Varh) (0.2 to 2 Vn and 0.2 to 3In) +/- 5.0% of reading at zero power factor
5.2 DISTURBANCE RECORDS
Disturbance Records Measurement Accuracy
Minimum record duration 0.1 s
Maximum record duration 10.5 s
Minimum number of records at 10.5 seconds 8
Magnitude and relative phases accuracy +/- 5% of applied quantities
Duration accuracy +/- 2%
Trigger position accuracy +/- 2% (minimum Trigger 100 ms)
5.3 EVENT, FAULT AND MAINTENANCE RECORDS
Event, Fault & Maintenance Records
Record location Battery-backed memory
Viewing method Front panel display or Settings Application Software
Extraction method Extracted via the front serial port
Number of Event records Up to 1024 time tagged event records (newest overwrites oldest)
Number of Fault Records Up to 15
Number of Maintenance Records Up to 10
Event time stamp resolution 1 ms
5.4 FAULT LOCATOR
Accuracy
Fault Location
+/- 2% of line length
R
eference conditions: solid fault applied on line
Chapter 22 - Technical Specifications P54A/B/C/E
518 P54xMED-TM-EN-1
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