major function

The electrical parameter tester is a portable instrument with small size, compact structure, and low power consumption, suitable for testing the performance of oilfield pumping units. This instrument adopts advanced electrical isolation technology, which isolates the voltage input, current input, and output from each other. The electrical parameter tester can measure the electrical parameters of lines and electrical equipment online (without power outage), with a wide range of measurement range. It can be applied to different lines for measurement, such as three-phase three wire, three-phase four wire, one phase two wire or one phase three wire, three-phase balance, etc. There are many measurement parameters, and the measurement of electrical parameters mainly includes real-time measurement of the effective values of each phase voltage, line voltage, and current, as well as frequency measurement; The maximum and minimum values of each phase voltage, line voltage, and current; The waveform factor (K value) of each phase voltage and current; Measurement of active power, reactive power, apparent power, power factor, and total power factor for each phase; Measurement of positive active power, negative active power, total active power, positive active energy, negative active energy, and total active energy; Measurement of positive reactive power, negative reactive power, total reactive power, positive reactive energy, negative reactive energy, and total reactive energy; Measure the average values of phase voltage, line voltage, current, frequency, and power factor during the measurement period; The average value of positive active power, active power, and total active power during the measurement period; The average value of positive reactive power, negative reactive power, and total reactive power during the measurement time; The cumulative value of positive active power, active power, positive reactive power, and negative reactive power during the measurement period; The cumulative value of total active power and total reactive power; Measurement of three-phase voltage imbalance of electrical equipment, harmonic measurement of three-phase voltage and three-phase current, analysis of harmonics from 0 to 31, distortion rate of harmonics from 0 to 31, total harmonic distortion rate, and display of harmonic bar chart. Display a harmonic curve graph of three cycles and collect the variation curves of active power, phase voltage, and current during the stroke cycle of a pumping unit. Collect the dynamometer curve of the pumping unit, and based on the displacement and load sensor output signals carried by the instrument, the curve of the power of the pumping unit rod changing with stroke height can be collected. Calculate the stroke cycle and number of strokes of the pumping unit. Calculate the maximum value of the upper stroke current and the maximum value of the lower stroke current for a pumping unit stroke cycle, and use the current method to calculate the balance rate of the pumping unit. Calculate the sum of active power in the upper and lower strokes within a stroke cycle, and then calculate the balance rate of the pumping unit based on the ratio of the sum of active power in the upper and lower strokes. According to the balance of the pumping unit's counterweight, the negative work done during the up and down strokes should be minimal or negligible. Therefore, increasing the accumulation of negative work during the stroke can determine whether the counterweight is reasonable by the percentage of negative work done during the stroke.

Measurement data printing

Print the basic electrical parameters during the measurement period, including data storage serial number, well number, measurement start and end time, total measurement time, average voltage and current of each phase, positive and negative active power average, positive and negative reactive power average, total active power average, total reactive power average, total apparent power average, average power factor, frequency average, as well as cumulative positive and negative active power, reactive energy, total active energy, and total reactive energy. Print the voltage curves of each phase during one stroke of the pumping unit. Print the current curves of each phase during one stroke of the pumping unit. Print the total active power curve of the pumping unit during one stroke.
Print voltage and current harmonic curves. Print the power diagram curve of the pumping unit and the curve of the power of the pumping unit rod changing with displacement.

Data query function

The instrument can query basic electrical parameter data, including the average values of three-phase phase voltage, line voltage, and current during the measurement time, the average active power, average reactive power, average apparent power, average power factor, average frequency during the measurement time, cumulative positive and negative active energy, cumulative positive and negative reactive energy, cumulative total active energy, cumulative total reactive energy, voltage imbalance, average values of active, reactive, and apparent power for each phase, average values of positive and negative active and reactive power, maximum values of line voltage and current for each phase, waveform factors for each phase, etc. The parameters of the pumping unit include the voltage, current, active power curve, dynamometer curve within one stroke cycle, as well as the balance rate of the pumping unit calculated based on the current method and power method.
Harmonic parameter query, including querying the distortion rate and total harmonic distortion rate of 0-31st harmonic of each phase voltage and current, the harmonic curves of the three cycles of voltage and current, and the harmonic content bar chart. Data communication, the instrument is equipped with an RS232 interface, which can upload measurement data to a computer for users to manage and analyze accordingly. It can store up to 100 wells of data with a large amount of storage capacity. The instrument is equipped with a lithium battery pack, which has a larger capacity and longer measurement time. When fully charged, the instrument can work continuously for no less than 15 hours (without a printer), with a charging time of about 8 hours. At the same time, the instrument has a battery level detection function.

Product parameters

● Measurement range

Phase voltage: 20V~250V/500V/1000V/1250V/1500V

Current: 0.1-100A/250A/500A/1000A

Frequency: 45-55Hz

Power: depends on the combination of voltage and current.

Measurement accuracy (at room temperature, power frequency 50Hz ± 5)

Voltage error: ≤ 0.5%

Current error: ≤ 0.5%

Power: ≤ 1%

Electricity level: ≤ 1%

Angle difference: ≤ 1.0°

Voltage imbalance (at room temperature, power frequency 50Hz ± 5), accuracy:< 1%

Frequency (at room temperature, power frequency 50Hz ± 5), accuracy: ± 0.1Hz

Harmonic, fundamental: ± (3%+2 words), 0 to 31st harmonic: ± (5%+3 words)

Baud rate: 115200BPS, format: N，8，1

● Environmental requirements

Operating temperature:- From 10 º C to+50 º C, the maximum operating temperature is:- 20 º C to+70 º C. Relative humidity: 5% to 80% (non condensing). Storage temperature:- 20 º C to+60 º C. Safety standards: EN61010－1。