| Measurement |
| Display |
Displays real-time measurement data on the LCD screen |
|
|
General |
Samples/cycle |
64 |
| Commercial frequency |
50/60 Hz |
| True RMS measurement |
Voltage, current: ±0.2% Reading |
| Frequency |
42 - 69 Hz |
| Residual voltage9, Residual current10 |
|
| Demand, peak demand, predicted demand1,2 |
|
| Maximum/Minimum value |
|
| Maximum2 minimum2, and average values within aggregation intervals2, 3 |
|
|
Energy |
Received energy, Delivered energy |
IEC 62053-22 Class 0.5S |
| Net energy(Received energy - Delivered energy) |
IEC 62053-22 Class 0.5S |
| Total(Sum) energy(Received energy + Delivered energy) |
IEC 62053-22 Class 0.5S |
|
Power Quality
|
Voltage/current harmonics |
Up to the 31st order |
| Voltage/Current THD4, Current TDD5 |
Up to the 31st order |
| Crest factor6,2,K–factor7,2 |
|
| Unbalance(voltage, current) 2 |
IEC 61000-4-30, NEMA MG1 |
| Vector diagram2 |
|
| Graphs for harmonic analysis(voltage, current)2 |
|
| Oscilloscope 2 |
|
| Demand trend2 |
|
|
Event
|
Fuse Fail, Phase Open, Blackout, and Over-temperature event detection |
|
| Number of event logs |
Maximum 50 |
| Temperature |
Number of temperature sensors on the side of the device8 |
1 |
| Communication |
RS-485(1,200 – 115,200 bps, Modbus RTU protocol) |
1 port(Ta, Tb) |
|
General
|
UL certification |
UL 61010-1 |
| CE certification |
EN 61326-1, EN 61326-2-1 |
| KC certification |
KN 22, KN 24 |
| AC power |
AC 85 - 265 V |
| DC power |
DC 100 - 300 V |
1. The predicted demand is calculated based on the assumption that the current demand value
is maintained during the remaining demand subinterval within a demand subinterval.
2. The data are not displayed on the LCD screen of 3300E and are provided only via communication.
3. Accura 3300E provides the maximum, minimum, and average values of voltage, current, and
power within aggregation intervals via communication. It includes measurement data that change
instantaneously during aggregation intervals. Thus, it allows for accurate trend analysis of voltage,
current and power quality.
4. THD(Total harmonic distortion), Voltage THD:
, CurrentTHD:
5. TDD(Total demand distortion), Current TDD:
Where
can be current rating, which is chosen only on communication between current rating(default) and peak demand current.
6. Crest factor:
, 7. K–factor:
8. It is not for fire monitoring, but only for the reference. A temperature sensor is mounted on the side of Accura 3300E
9. Residual voltage is the rms voltage value calculated by adding up three phase voltages in the time domain.
10. Residual current is three times the zero-sequence current of the fundamental component of
three phase current. If there are no harmonics, residual current is equal to the rms current value
calculated by adding up three phase currents in the time domain.
