Three Phase Reference Meter

タイトルまたは説明

Standard meter SNT ***8 is a three phase or single phase electronic standard meter of accuracy class 0.*2 or class 0.*5. It has been developed for the testing of electronic energy meters by means of meter test bench. It is designed for all modes of operation in three phase systems up to **0A.

Features:

1.    High precision and long term stability.

2.    Universal unit for many applications.

3.    Measuring various kinds of electric parameters in the three-phase or single phase circuit synchronously.

4.    Calculating directly the reactive power makes the phase place very accurate in angle measurement.

5.    Three energy constants only, leads to simple calibration and reliable result.

6.    Have the function of low frequency pulse to calculate the error.

7.    Vector diagram display.

8.    Waveform display for voltage¤t of each phase.

9.    Analysis and display of harmonics.

*0.  RS **2 and RS**5 interface, can be operated by computer system.

Technical:

Power Supply:

Voltage                      AC **0V±*0%

Frequency                   *0HZ ±2HZ

Max power consumption       *5VA

Using Condition:

Environment temperature:    *0℃～*0℃

Relative humidity            *5%～*5%

Outside magnetic intensity    ≤0.**5mT

Frequency range            *5HZ～*5HZ

Test Current:

Range                      1Ma～**0A

Error                      ±0.*2% (*0Ma…**0A)(relative measurement value)

                           ±0.*5% (1…*0Ma) (relative range full-scale value)

Current display            1Ma…**0A (1A, *0A, **0A)

Error                     ±0.*2% (relative measurement value)

Test Voltage

Range                    *0V～**0V (automatic range switch)

Error                    ±0.*2% (*0V…**0V)(relative measurement value)

                         ±0.*5% (5V…*0V)(relative range full-scale value)

Power Measure Error

Active power            ±0.*2% (relative measurement value) *0V…**0V, 0.*5A…**0A

Reactive power          ±0.*5% (relative measurement value) *0V…**0V, 0.*5A…**0A

Apparent power          ±0.*5% (relative measurement value) *0V…**0V, 0.*5A…**0A

Test Power Factor (PF=P/S) Error        0.*5%

Display range                         *1～*1

Measuring Modes         

4 wire active / reactive / cross-connected reactive

3 wire active / reactive / cross-connected reactive

2 wire active / reactive

Energy Pulse Input

Frequency                0.5Khz

Voltage                   *4V

Measurement Range of Input

Rated voltage             *0V…**0V

Rated current             0.**1A…**0A

Output                             TTL pulse, load ＞2kW

                                   High frequency pulse output: F=**0Khz

                                   Low frequency pulse output: F=*0HZ

Dimensions                         **1mm×**2mm×**0mm

Weight                             *6kg