Digital dual-clamp phase voltmeter is the latest product of our clamp-shaped series of instruments. It is a hand-held, dual-channel input of a fully digital, multi-functional, high-precision measuring instrument. The instrument uses the latest microprocessor technology and digital signal processing technology to realize the measurement of power frequency parameters (such as voltage, current RMS, power frequency, phase relation, etc.) by direct AC sampling method, to distinguish transformer wiring groups, inductive and capacitive circuits, to test secondary circuit and bus differential protection system, to read out the phase relationship between different groups of CT of differential protection, and to check the power level. Whether the connection of the meter is correct or not, the meter uses clamp current transformer conversion mode to input the measured current, so there is no need to disconnect the measured circuit when measuring. It provides a safe, accurate and convenient new power meter for power inspectors.

Digital dual-clamp phase voltmeter is suitable for power, petrochemical, metallurgical, railway, industrial and mining enterprises, scientific research institutes, measurement departments, etc. Especially suitable for electric energy billing system and relay protection system.

1. Benchmark working conditions

Influence quantity

Datum condition

Working conditions

Remarks

ambient temperature

23 C + 1 c

- 10 ~40 C

Environmental wet crossing

40% to 60%

< 80%

Signal waveform

sine wave

sine wave

Beta =0.05

signal frequency

50Hz + 1Hz

45Hz ~ 65Hz

Instrument operating voltage

9V + 0.1V

9V + 1V

Voltage Amplitude in Phase Measurement

220V + 20V

30V ~ 500V

Current Amplitude in Phase Measurement

2A + 0.2A

10mA~20.00A

External electric field and magnetic field

Should avoid

Location of measured conductor

Approximate geometric center position of the measured wire at the clamp

2. Range and Accuracy Errors

category

range

Resolving power

Fundamental error

Voltage

AC 0.00V~600V

0.01V

(1.5% RDG + 3dgt)

Electric current

AC 0.0mA~20.0A

0.1mA

(1.5% RDG + 3dgt)

phase

0.0-360 degrees

0.1 degrees

+ 1 degrees

frequency

45Hz ~ 65Hz

0.01Hz

+ 0.5Hz

Note: The phase error under working conditions is [3].

3. General specifications

function

Measure two AC voltage, current, phase between voltage, phase between current, phase between voltage and current, frequency between voltage and current, distinguish transformer connection group, inductive and capacitive circuit, test secondary circuit and bus differential protection system, read out the phase relationship between CT groups of differential protection, check whether the connection of watt-hour meter is correct or not, and overhaul circuit equipment, etc.

Power Supply

DC9V alkaline dry cell

Power waste

Maximum power consumption of 30 mA is achieved by turning on the backlight lamp. Batteries work continuously for more than 12 hours.

display mode

LCD display, 60 x 33 mm

Instrument size

Length, width and thickness: 192 x 92.5 x 36 mm

Voltage range

AC 0.00V~600V

current range

AC 0.0mA~20.0A

Phase range

0.0 360.0.

Frequency range

45.00Hz to 65.00Hz

Resolving power

Voltage: AC 0.01V

Current: AC 0.1 mA

Phase: 0.1 degree

Frequency: 0.01Hz

Detection rate

About 2 seconds / time.

Data retention

Press HOLD key to keep data in the test and "H" symbol display

Automatic shutdown

After about 15 minutes, the instrument shuts down automatically to reduce battery consumption.

Backlight function

Suitable for dark places and night use

Voltage detection

When the battery voltage is less than 7V, the low symbol of the battery voltage is displayed.

Instrument quality

Host: 362g (Battery mounted)

Nozzle current clamp: 180g *2

Test line: 190g

Test line length

1.5m

Current clamp length

2m

Working temperature and humidity

- 10 ~40 below 80% Rh

Storage temperature and humidity

- 10 ~60 below 70% Rh

Input impedance

The input impedance of the test voltage is: 1M

Withstand voltage

Sinusoidal AC voltage withstanding 1000V/50Hz between instrument circuit and shell lasts 1 minute

insulation

Between Instrument Circuit and Outer Shell (> 100M)

structure

Double insulation

Suitable for safety regulations

IEC 61010-1 CAT III 600V, IEC 61010-031, IEC 61326, pollution level 2

1. It is very convenient to use large screen and high backlight display to clarify the working status and test parameters of the display instrument.

2. Measure the voltage, current, phase and frequency of the power grid.

3. Small current 5mA phase measurement is very suitable for checking the connection status of new installed users without load after commissioning. The instrument has high measuring accuracy and wide measuring range.

4. Automatic identification of transformer windings, capacitance and inductive load.