Overview of using intelligent three-phase phase voltammetry

Intelligent three-phase phase voltammeter model: SY3001C

First, the product overview

SY3001C intelligent three-phase phase voltammeter is a high-precision intelligent test instrument that solves the problem of light load and small current phase measurement. Using high-precision ADC and DSP technology for measurement, using Windows CE 5.0 operating system-based embedded handheld computer for operation and data processing, fully graphical interface, true color display, touch screen operation, Chinese handwriting input, human-machine interface friendly, software Free lifetime upgrade for life. The instrument handheld structure, exquisite and beautiful, accurate measurement, simple operation, safe and reliable, is an intelligent field measuring instrument that cannot be compared with other single-chip based instruments.

Second, the functional characteristics

1. Simultaneously measure the amplitude of 1-3 AC voltage, 1-3 AC current and the phase between them without disconnecting the circuit under test, measure single/three-phase power and power factor, measure frequency Isoelectric parameter

2. The six input quantities are all isolated, support any wiring mode, the three voltages are not common, each channel can carry out voltage measurement of any two points, and the voltage phase measurement between the primary and secondary of the transformer can be performed to determine the polarity of the transformer. When measuring the phase, the phase between any signals can be measured based on any input;

3. High-brightness true color TFT screen, vector display, table, sub-channel and other display modes, the same screen can display more than 20 electrical parameters, the measurement data is clear at a glance; the color vector map is fine and clear, the figure can be on each vector Display a variety of information such as amplitude and angle at the same time;

4. Support PT, CT ratio setting, you can display the primary side value according to the setting calculation;

5. Voltage, current true RMS principle measurement, not affected by waveform distortion, automatic range, reasonable setting;

6. Vector drawing can set the positive direction to clockwise or counterclockwise; you can set the 0 degree angle to 12 or 3 o'clock, the reference angle is 330° or 0°, you can set the following table type and current voltage Radius ratio, in line with various user habits;

7. Save data on site, automatically record measurement time, operator and other information, you can add Chinese character notes to the measurement results at any time, and the measurement data is stored indefinitely;

8. With USB interface, the measurement data can be uploaded to the computer for browsing, exporting, editing, printing (A4 format), backup, recovery, etc., and can be exported to generate standard web page format files and test reports with tables and vector diagrams;

9. Support user software calibration;

10. New small precision high current clamps;

11. Ultra-low power consumption, large capacity 6000mA/h Lithium battery can work continuously for more than 20 hours, can also be charged online, and external AC power works normally;

12. Software free remote upgrade for life, SD card expansion storage, multimedia playback, download and install a variety of applications, system functions can be extended with software upgrades.

Third, use

The instrument is a professional instrument for power system energy metering and relay protection, and performs on-site detection of secondary circuits. Also widely used in electrical equipment manufacturing, petrochemical, steel metallurgy, railway electrification, research and teaching departments.

Has the following uses:

1. Detect the phase relationship between the CTs of each group of relay protection;

2. Check if the meter is wired correctly or not;

3. Determine the speed of the electricity meter and reasonably collect the electricity fee;

4. Discrimination of inductive and capacitive circuits;

5. Check the transformer wiring group;

6. Measurement of current and voltage phase in the production of electrical equipment;

7. Use as a leakage current meter.

Fourth, technical parameters

Basic error limit

parameter

Range

Resolution

Error limit

Voltage range

500.0V

0.01V

±0.2% of range

100mA

0.1mA

Electric flow range

1A

1mA

± (0.3% reading + 0.2% of range)

5A

10mA

Phase

360.0°

0.1°

±1.0°

frequency

45.00-65.00Hz

0.01Hz

±0.1Hz

power

(PF=1.0)

0.1W

± (0.5% reading + 0.5% range)

Phase measurement current, voltage range: 1mA-5A, 3V-500V

2. Measurement feature description

2.1 voltage channel

Input method: floating input

Measurement method: true RMS principle

Input impedance: 500KΩ

Voltage limit: 500V

2.2 Current channel

Input method: clamp current transformer sampling input

Measurement method: true RMS principle

2.3. Phase measurement

The meter measures and displays the phase between all inputs. The phase values ​​displayed are all in accordance with the regulations.

When the signal is input in the positive direction, the latter vector lags behind the phase value of the previous vector. The error is shown in the following table within the specified input signal amplitude range:

model

Range of amplitude

tolerance scope

50V-400V, 0.2A-2A

±1°

SY3001C

3V-500V, 10mA-5A

±2°

3V-500V, 2mA-10mA

±3°

3V-500V, 1mA-2mA

±6°

2.4 Frequency measurement

When the meter measures the frequency, if there is U 1 input, it will be sampled by U 1 . If there is no U 1 input, it will be sampled by I 1 .

The sampling is in the order of U 1 , I 1 , U 2 , I 2 , U 3 , I 3 .

Fourth, technical parameters

Basic error limit

parameter

Range

Resolution

Error limit

Voltage range

500.0V

0.01V

±0.2% of range

100mA

0.1mA

Electric flow range

1A

1mA

± (0.3% reading + 0.2% of range)

5A

10mA

Phase

360.0°

0.1°

±1.0°

frequency

45.00-65.00Hz

0.01Hz

±0.1Hz

power

(PF=1.0)

0.1W

± (0.5% reading + 0.5% range)

Phase measurement current, voltage range: 1mA-5A, 3V-500V

2. Measurement feature description

2.1 voltage channel

Input method: floating input

Measurement method: true RMS principle

Input impedance: 500KΩ

Voltage limit: 500V

2.2 Current channel

Input method: clamp current transformer sampling input

Measurement method: true RMS principle

2.3. Phase measurement

The meter measures and displays the phase between all inputs. The phase values ​​displayed are all in accordance with the regulations.

When the signal is input in the positive direction, the latter vector lags behind the phase value of the previous vector. The error is shown in the following table within the specified input signal amplitude range:

model

Range of amplitude

tolerance scope

50V-400V, 0.2A-2A

±1°

SY3001C

3V-500V, 10mA-5A

±2°

3V-500V, 2mA-10mA

±3°

3V-500V, 1mA-2mA

±6°

2.4 Frequency measurement

When the meter measures the frequency, if there is U1 input, it will be sampled by U1. If there is no U1 input, it will be sampled by I1.

The sampling is sequentially U1, I1, U2, I2, U3, I3.