Detecting faults in low-voltage distribution cabinets using a phase volt-ampere meter

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The Zhengneng ES2010 two-clamp phase volt-ampere meter can measure AC voltage, current, phase, and frequency. The size of its clamps is φ7.5mm; the phase measurement range is 0.0～360°, the current range is 0.0mA～20.0A, and the voltage range is 0.00V～600V. Its biggest advantage is the ability to measure frequency. Below is an introduction to how to use ES2010 to measure voltage, current, phase angle, and frequency in low-voltage distribution cabinets. On-site diagram of the low-voltage distribution cabinet being measured: http://m.znele.com/uploads/allimg/151214/1-151214161G2494.jpg http://m.znele.com/uploads/allimg/151214/1-151214161H9139.jpg The standard accessories for the ES2010 two-clamp phase volt-ampere meter include: 1 main unit, 1 instrument box, 2 current clamps, 4 test wires (2 red and 2 black), 1 9V alkaline battery, And a set of instructions and certification documents: http://m.znele.com/uploads/allimg/151214/1-151214161J3934.jpg To measure voltage using the ES2010 two-clamp phase volt-ampere meter, connect the wires as shown in the diagram; additional wiring diagrams can be found in the instructions: http://m.znele.com/uploads/allimg/151214/1-151214162GU07.jpg When measuring voltage, it is first necessary to estimate the approximate range, and then select the appropriate setting on the meter. This voltage should be around 400V or so; therefore, set it to the 600V setting. Use this setting for measurements within the range of 200V–600V. http://m.znele.com/uploads/allimg/151214/1-151214161941133.jpg Press the POWER button to turn it on – the voltage at this time is 402V. http://m.znele.com/uploads/allimg/151214/1-151214161955603.jpg Now measure the phase between Ib and Uab; set it to the I1U2 phase setting, and the phase angle is 179.1 degrees. http://m.znele.com/uploads/allimg/151214/1-151214162010430.jpg The ES2010 meter can also measure frequency – just press the HZ button to obtain the frequency value. When the rotary switch is set to the current or voltage setting for U1 or U2, the current frequency can be measured in Hz. The frequency at this time is 50HZ. http://m.znele.com/uploads/allimg/151214/1-15121416202G55.jpg By inserting the CT1 current clamp into port I1, it is possible to measure the current value. http://m.znele.com/uploads/allimg/151214/1-151214162041127.jpg Switch to the current measurement mode to estimate the current value; in this case, the current is 1.26A. http://m.znele.com/uploads/allimg/151214/1-151214162054322.jpg Once the measurement is complete, turn off the device using the POWER button to finish the process. http://m.znele.com/uploads/allimg/151214/1-15121416210I36.jpg The above is an example of using the Zhengneng ES2010 dual-clamp phase volt-ampere meter to measure parameters such as voltage, current, phase angle, and frequency in low-voltage distribution cabinets