Excessive comprehensive error of electric energy measurement is a key problem commonly found in electric energy measurement. The measurement error caused by the voltage drop of the secondary circuit of the voltage transformer is often the biggest factor affecting the comprehensive error of the electric energy measurement. The so-called error caused by the secondary voltage drop of the voltage transformer refers to the percentage of the voltage amplitude difference between the secondary terminal and the load terminal of the voltage transformer relative to the secondary actual voltage, and the general term for the phase difference between the two voltages. .
The secondary voltage drop/load tester is an intelligent instrument for fully automatic testing of the secondary voltage drop/load of the voltage transformer, which is carefully designed and developed by our company to absorb the advantages of similar products at home and abroad.
The instrument has the advantages of small size, light weight, high measurement accuracy, good stability, easy operation and easy learning, etc., simple wiring, convenient testing and recording, and greatly improved work efficiency. It uses large-screen true color graphic LCD as the display window, graphic menu operation and Chinese character prompts, a multi-parameter display interface, friendly man-machine dialogue interface, easy and fast to use, and is suitable for power users at all levels Preferred product.
1. Use environment
(1) Ambient temperature: -10℃～40℃
(2) Relative humidity: ≤80%
2. Measurement accuracy
The measurement accuracy of this instrument is level 1.
Ratio difference: Δf = ± (1% × f + 1% × δ) ± 0.01 (%)
Angle difference: Δδ=±(1%×δ＋1%×f) ±1 (minutes)
Conductivity: G=± (1%×G＋1%×δ±0.01) mS
Susceptance: δ=± (1%×δ＋1%×G±0.01)mS
Load: S=± (1%×S±0.1)VA
Resistance: R=± (1%×R+1%×X±0.1)Ω
Reactance: X=± (1%×X+1%×R±0.1)Ω
3. Charging power supply: AC 176V~264V, frequency 45-55Hz
4. The measuring range and resolution of the instrument
Test item Range Minimum resolution
Voltage measurement range (V) 40～120.000 0.001
Current measurement range (A) 0.005～6 0.0001
Ratio difference (%) -10.000～10.000 0.001
Angle difference (ˊ) -600～600.00 0.01
Error value (%) -10.000～10.000 0.001
Rounding off (%) -10.000～10.000 0.001
5. Insulation: ⑴. The insulation resistance of the voltage and current input terminals to the case is ≥100MΩ.
⑵The power frequency is 2KV (effective value) between the input terminal of the working power supply and the shell, and the experiment lasts for 1 minute.
6. Battery working time: The working time is more than 6 hours after being fully charged.
7. Volume:
Host: 32cm×24cm×13cm
8. Weight:
Host: 2.5Kg
1. Automatically complete the measurement of the secondary voltage drop of the three-phase three-wire or three-phase four-wire voltage transformer.
2. Automatically calculate the ratio difference, angle difference and comprehensive error of the three phases.
3. It can automatically detect and store the measurement error data caused by the test leads in various wiring modes, and automatically correct it in the future tests.
4. The software correction function is specially designed, which can realize the accuracy correction without hardware adjustment. It can be verified on-site at all levels of electric power test and research departments.
5. All kinds of electrical parameters are displayed on the same screen, voltage, current, phase angle, power factor, active power, reactive power, and apparent power can be measured; waveform diagrams of various phase parameters can be displayed.
6. With the function of harmonic measurement, it can measure the harmonic content of voltage and current below the 32th order.
7. Built-in large-capacity rechargeable battery pack, which can be powered by the battery pack in the instrument when there is no 220V AC outdoors, and the built-in fast automatic charger can quickly charge the battery pack.
8. The function of indicating the percentage of remaining battery power is by no means a simple alarm for power loss.
9. Large screen, high-brightness true color LCD display, full Chinese character graphical menu and operation prompts to achieve friendly man-machine dialogue, conductive silicone buttons make the operation easier, wide temperature LCD with automatic contrast and brightness adjustment, which can adapt to winter and summer Each season.
10. The user can print out the test data through a micro printer at any time.
11. Test result storage function, which can store 200 sets of test data.
12. Equipped with background management software, which can upload storage records to the computer for unified management.
Mobile version
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