Used for wireless synchronous measurement of voltage amplitude, current amplitude, voltage phase, current phase, frequency, power and other parameters of different measurement points in the secondary circuit of the substation, and can also synchronous display the three-phase voltage and current vector diagram in the master and slave machine screen. Solve the problem that current and voltage cannot be measured at different points in smart substation completely. 1. Model No.: ETCR4480 2. Voltage Range : 2V~700V 3. Current Range : 0.001A-20A 4. voltage and current accuracy up to class 0.3; phase accuracy is ±0.3 5. Phase : 0°~360° 6. Power Supply: DC7.4V, 5200mAH rechargeable lithium battery

In the case of the tested circuit is not open-loop, measure two AC voltages, current, phase between voltages, phase between currents, phase, frequency, phase sequence, active power, reactive power, apparent power, and power factor between voltage and current. Discriminate the transformer wiring group, inductive and capacitive circuits, test the secondary circuit and the busbar protection system, read the phase relationship between the CTs of the differential protection groups, check the wiring of the meter for correctness, and repair the line equipment, etc. 1. Model No.: ETCR4000A 2. Simultaneous measurement of two channel AC current, range: 0.0mA~20.0A 3. Simultaneous measurement of two channel AC voltage, range: 0.00V~600V 4. Simultaneous measurement the phase between UU, II, UI, range: 0.0°~360.0° 5. Active power Range:0.0W～12kW 6. Power supply : DC9V Alkaline battery LR61.5V AAX6PCS

In the case of the tested circuit is not open-loop, measure two AC voltages, current, phase between voltages, phase between currents, phase, frequency, phase sequence, active power, reactive power, apparent power, and power factor between voltage and current. Discriminate the transformer wiring group, inductive and capacitive circuits, test the secondary circuit and the busbar protection system, read the phase relationship between the CTs of the differential protection groups, check the wiring of the meter for correctness, and repair the line equipment, etc. 1. Model No.: ETCR4020 2. Simultaneous Measurement of Two Channel AC Current Range : 0mA~600A 3. Simultaneous Measurement of Two Channel AC Voltage Range: 0.00V~600V 4. Simultaneous Phase Test Between UI, II and UU Range : 0.0°~360.0° 5. Frequency Range: 45.00Hz～65.00Hz 6. Power Supply : DC9V Alkaline battery LR61.5V AAX6PCS

In the case of the tested circuit is not open-loop, Measuring three-phase AC voltage, current, phase between voltages, phase between currents, phase, frequency, phase sequence, active power, reactive power, apparent power, and power factor and current vector sum. 1. Model No.: ETCR4320 2. Voltage Range: AC 0.00V～600V 3. Current Range: AC 0.0mA～600A 4. Frequency Range: 45.00Hz～65.00Hz 5. Data Storage : 500 groups 6. Power Supply : DC9V Alkaline battery (LR6 1.5V AA×6)