DT3 series voltage monitor
Shunyang brand DT3/G series voltage monitor specification table
|model||Regulations||Way||Monitor voltage||Work power|
～100V，Connect with monitoring voltage in parallel.
～220V，Connect with monitoring voltage in parallel.
～380V，Connect with monitoring voltage in parallel.
Let's take Sunyang brand DT3-1×100V/G as an example for detailed introduction.
Model specification: DT3-1×100V/G
The rated voltage of the monitored circuit: the grid voltage of 3kV and above that is transmitted to PT100V
Number of voltage circuits that can be monitored: 1
Statistical form: The instrument automatically classifies statistics by day and month.
Statistics items: the current day, current month and the previous 24 months when the maximum and maximum voltages appear, the minimum and minimum values, the average value, the pass rate and the pass time, the upper limit rate and the upper limit time, the lower limit rate and Lower limit time, statistical time, daily hourly value, maximum value of distortion rate and time of occurrence, average value
Main functions: When the daily and monthly statistical time expires, the statistical data is automatically stored in the storage unit of the previous day and the previous month, and the initialization is completed at the same time, and the new statistics can be read; any of the current day, the current month and the previous 24 months can be read Month, the first 62 days of any day when the voltage maximum and maximum values appear, the minimum and minimum values appear time, the average value, the pass rate and the pass time, the upper limit rate and the upper limit time, the lower limit rate and the lower limit time , Cumulative statistical time, hourly point value, average distortion rate, maximum distortion rate and the time when the maximum appears, etc.
The main performance characteristics are as follows:
Data communication uses fixed-length and non-fixed-length frame formats, and fixed-length and non-fixed-length frames each use a unified message format with a checksum to ensure correct and effective data communication.
The calculation of the distortion rate adopts the FFT algorithm, which can calculate the 2 to 31 harmonics, and can display the 2 to 27 harmonic peaks through the bar graph through the menu operation.
During the power failure, the built-in lithium battery maintains the timing, but no sampling and statistics are performed.
Either RS232 or RS485 communication mode can be selected.
Power failure data storage time:> 10a
Sampling period: Sampling the complete waveform of 35 sine wave cycles per second, sampling 64 points for each sine wave, and then performing true effective value and FFT calculation.
Display format: 192×64 backlit liquid crystal display, the backlight will automatically turn off in one minute; Chinese character menu operation, statistical data graph display. The upper and lower limit warning voltage values can be set separately to realize the controllable buzzer alarm when the instantaneous value exceeds the limit.
Display period: 1s
Statistical cycle: 1min (that is, take 1 minute as a time period, find the average voltage and the average distortion rate within 1 minute, and then compare the corresponding data of the current day and month for statistics and storage).
Statistical accuracy: 0.5%
Voltage measurement range: 10%Un～120.5%Un (Un is the rated value of the measured voltage, when the measured voltage is less than 0.75 Un, no statistics will be made, only for display reference)
Absolute value of voltage comprehensive measurement error (within the range of Un±20%): ≤0.5%
Frequency measurement range: 50 Hz±5%
Absolute value of frequency comprehensive measurement error: ≤0.5%
Absolute value of voltage distortion rate measurement error: ≤5.0% (Grade B)
Clock error: ≤1s/24h
Normal working environment conditions:
Ambient temperature: -5～+40℃ Limit temperature: -10～+50℃
Relative humidity: 40℃ (20～90)%RH
Atmospheric pressure: 79.5～106.0kpa (altitude 2000m and below)
Power supply voltage: Ug±20% (Ug=AC100V or 220V or 380V, subject to the actual working power supply voltage marked by the instrument)