Display |
Shows real–time measurement data on the LCD screen |
Voltage |
L-N voltage, L-L voltage, Fundamental frequency, Harmonics, Phasor diagram, THD1, Symmetrical components(positive–, negative–, zero–sequence),Voltage unbalance(symmetrical components and the NEMA standard),Residual voltage |
Current |
Phase current, Fundamental frequency, Harmonics, Phasor diagram, THD1, TDD2, Symmetrical components(positive–, negative–, zero–sequence), Current unbalance(symmetrical components and the NEMA standard),Residual current |
Power |
Active power, Reactive power, Apparent power |
Power Quality |
Voltage / Current harmonics |
Magnitude of each harmonic up to the 50th order, THD, Current TDD, Crest factor, K–factor |
Dip/Swell |
RMS voltage refreshed every cycle |
PQ Curve |
RMS voltage refreshed every cycle |
Unbalance (voltage, current) |
Unbalance according to the NEMA standard, Negative–/zero–sequence unbalance based on symmetrical components |
Phasor diagram |
Voltage and current phasor |
Waveform
|
Voltage and current waveforms |
Data available via communication: 12 cycles of waveforms (128 samples/cycle), Data available via the device’s LCD screen: 2 cycles of waveforms (128 samples/cycle) |
Events |
Power quality events3
|
Dip/Swell events |
PQ Curve events |
Up to 500 power quality events can be saved. |
Measurement events
|
Voltage connection events3 |
Determined using the voltage/current data measured at 0.2-second intervals (definite time: 1 second |
Phase open event |
Fuse fail event |
Blackout event |
User-defined events3
|
Users can set up event input data, thresholds, and event detection methods. Event setup can be performed only via communication. |
Up to 80 events can be set up. |
Event input data |
Data measured at 0.2-second intervals |
Selectable among Voltage/Current/Power/ Etc. |
Threshold |
Set by users |
Detection method |
“Over” or “Under” condition set by users |
Module events
|
Determined with the data measured with a resolution of 0.01 seconds |
Digital input events |
Rising or Falling edge detection events |
Analog input events |
“Over” or “Under” events |
Thresholds set by users |
Up to 500 measurement events can be saved. |
System events |
Events on module control, communication status, setup, etc |
Up to 1,000 system events can be saved. |
Aggregation of Measurement Data |
Aggregation intervals
|
Fixed intervals |
6 intervals (1 sec, 5 sec, 1 min, 5 min, 1 hr, and 6 hr) |
User-defined intervals |
Supports 5 user-defined aggregation intervals |
Aggregation for average values
|
Average value |
Average of values measured at 0.2-second intervals |
Max/Min value |
Max/Min values measured at 0.2-second intervals |
Aggregation for the latched value4
|
Last latched value |
Provides the last measured data by latching the value |
Data displayed on the LCD screen
|
Average value |
Average of values measured at 0.2-second intervals
(1-second aggregation interval) |
Max/Min value |
Max/Min value of the average values for the 1-second aggregation interval after resetting the values |
Connections of IO Modules |
Users can check the measurement data and connection status of the connected IO modules with the function to automatically detect module connection status and set up module IDs. |
Max. number of IO modules connectable to the back of the meter |
4 (The total power consumption of IO modules should not exceed 8 W) |
External Communication with the Host System |
Ethernet communication5
|
Communicates with the host system using the Modbus TCP protocol at 100 Mbps |
Transfers a large amount of measurement data to the host system at high speeds |
The 2 ports allow for Ethernet connection between Accura 3700 devices. |
Wiring: Star, Daisy–chain, Ring connections (RSTP support6) |
RS–485 communication |
Communicates with the host system using the Modbus RTU protocol |
1,200 / 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 7 bps |