WD-300B three-phase intelligent phase voltammeter is a multi-functional intelligent meter specially designed for on-site testing. The host adopts a 3.5-inch true color LCD screen, with graphical menu interface display and vector diagram instructions, which are clear at a glance. The small clamp head design of the current clamp is easy to operate, and is very suitable for places with dense cables. The instrument can simultaneously measure three-phase AC voltage, current, phase between voltages, phase between currents, phase between voltage and current, frequency, phase sequence, active power, reactive power, apparent power, etc. Power factor and current vector sum, identify transformer wiring group, inductive and capacitive circuits, test secondary circuit and bus differential protection system, read out the phase relationship between CTs of each group of differential protection, and check that the wiring of the watt-hour meter is correct Whether or not, repair line equipment, etc., to provide a safe, accurate and convenient smart meter for electricity inspectors. Applicable to electric power, petrochemical, metallurgy, railway, meteorology, industrial and mining enterprises, scientific research institutions, measurement departments, etc. Especially suitable for electric energy billing system and relay protection system.
1.Baseline conditions and operating conditions
影响量 | Baseline conditions | working conditions |
ambient temperature | 23℃±1℃ | -10℃~40℃ |
environmental humidity | 40%~60% | <80% |
Signal waveform | Sine wave β=0.01 | Sine wave β=0.01 |
signal frequency | 50HZ±1HZ | 45HZ~65HZ |
Instrument operating voltage | 7.4V±0.5V | 7.4V±1V |
Current amplitude when measuring phase frequency and phase sequence | 1A±0.1A | 1mA~30A |
Voltage amplitude when measuring phase frequency and phase sequence | 100V±10V | 1V~600V |
Current amplitude when measuring power factor | 1A±0.1A | 10mA~30A |
Voltage amplitude when measuring power factor | 100V±10V | 10V~600V |
External electric and magnetic fields | should be avoided | |
Measured lead position | The conductor under test is at the approximate geometric center of the jaw |
2. general specification
Features | Simultaneously test the current, voltage, phase, frequency, phase sequence, active power, reactive power, apparent power, power factor, and current vector sum in the three-phase 380V/220V power system, and determine the transformer wiring group, inductive, capacitive circuit, test the secondary circuit and the bus differential protection system, read out the phase relationship between the CTs of each group of differential protection, check whether the wiring of the watt-hour meter is correct or not, and repair the line equipment, etc. |
power supply | DC 7.4V large-capacity rechargeable lithium battery, USB charging interface, fully charged for about 10 hours of continuous work |
Rated current | About 180mA Max |
display mode | 3.5 inch true color LCD display |
Meter size | Length, width and thickness: 196mm×92mm×54mm |
Jaw size | φ7.5mm×13mm |
sample rate | About 3 times/sec |
Range | AC voltage: 0.00V~600V |
AC current: 0.0mA~30A | |
Phase: 0.0°~360.0° | |
Frequency: 45.00Hz~65.00Hz | |
Active power: 0.0W~12kW | |
Reactive power: 0.0VAR~12kVAR | |
Apparent power: 0.0VA~12kVA | |
Power factor: -1~+1 | |
Current vector sum: 0mA~60A | |
Resolution | Voltage: AC 0.01V |
Current: AC 0.1mA | |
Phase: 0.1° | |
Frequency: 0.01Hz | |
Active power: 0.1W | |
Reactive power: 0.1VAR | |
Apparent power: 0.1VA | |
Power factor: 0.001 | |
Current vector sum: 1mA | |
Accuracy | Voltage: ±(0.5% of range) |
Current: ±(0.5% of range) | |
Phase: ±1° (Phase error under working conditions: ±3° from 10mA to 30A; ±5° below 10mA; when the current value is lower than 5mA, in order to ensure accurate current-to-current phase measurement, please do not measure voltage; In the phase test of voltage to current, in order to ensure the accuracy of the measurement, the voltage should not be lower than 5V and the current should not be lower than 5mA) | |
Active power: ±(1.0% of range) | |
Reactive power: ±(1.0% of range) | |
Apparent power: ±(1.0% of range) | |
Frequency: ±(1.0% range) | |
Power factor: ±0.03 | |
Phase | Positive phase: U1, U2, U3 or I1, I2, I3 cursors flash sequentially from left to right |
Inverted: U1, U2, U3 or I1, I2, I3 cursors flash sequentially from right to left | |
Detection rate | About 2 seconds/time |
data retention | During the test, press the HOLD key to keep the data, and the "HD" symbol will display |
data storage | 99 groups |
charging interface | USB charging port |
Automatic shut-down | After about 15 minutes of power on, the meter automatically shuts down to reduce battery consumption |
Backlight function | Yes, backlight brightness can be adjusted |
Voltage detection | When the battery voltage is lower than 6.5V, the low battery voltage symbol will be displayed, reminding to charge the battery, and automatically shut down within 10S. |
Instrument weight | Host: 350g (with battery) |
Current clamp: 170g×3 | |
Total mass: about 1.35kg | |
Test lead length | 1.5m |
Current clamp wire length | 2m |
Working temperature and humidity | -10℃~40℃; below 80%Rh |
Storage temperature and humidity | -10℃~60℃; below 70%Rh |
input resistance | Test voltage input impedance: 1MΩ |
Pressure resistance | Withstand 1000V/50Hz sine wave AC voltage between instrument circuit and enclosure for 1 minute |
Insulation | Between instrument line and sheath shell ≥100MΩ |
Suitable for safety regulations | IEC61010-1 CAT Ⅲ 600V, IEC61010-031, IEC61326, pollution degree 2 |
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