ETCR EM4500 Wireless PT Secondary Voltage Drop/Load Tester, also known as PT nuclear phase meter, PT load tester, PT specific difference tester, is used for on-site online testing of the secondary circuit voltage drop of the voltage transformer of the electric energy metering device (hereinafter referred to as PT), as well as PT nuclear phase, PT load test, CT load test, three-phase voltammeter, harmonic analysis, etc.The instrument consists of 2 handheld terminals, 6 current pliers, 2 sets of voltage test lines, etc. The 2 handheld terminals have wireless communication and GPS communication, and can be set as host or slave to each other to achieve synchronous measurement of current, voltage, phase and other parameters between different locations in the substation. When a single handheld terminal is used, it is used as a three-phase phase voltammeter, which can measure current, voltage, phase, power, frequency, power factor and other parameters and harmonic analysis, and can display vector diagrams of three-phase voltage and three-phase current in real time.When used as a load tester, it can measure the voltage, current, conductivity, admittance, frequency on the PT side, and the voltage, current, resistance, reactance, frequency and other parameters on the CT side. When two handheld terminals are used at the same time, regardless of the host and slave.Through wireless communication and GPS satellite timing technology, six-channel voltage amplitude, phase and other parameters can be simultaneously measured at different locations of the substation, and the secondary side voltage drop of the single-phase or three-phase voltage transformer and the errors caused by the secondary can be measured, and the ratio difference, phase difference and slave main voltage difference can be calculated in real time.Wireless PT nuclear phase can be performed.When the two instruments are turned on at the same time, it is possible to set the wiring type, communication channel, master-slave switching, time setting, etc. in linkage.

When four handheld terminals are used at the same time, one of them can be set as the host and the other three as the slave, which is particularly suitable for multi-point synchronous testing, flexible on-site application, and more convenient testing.

ETCR EM4500 Wireless PT Secondary Voltage Drop/Load Tester adopts 5-inch touch color screen, Chinese interface, direct function, automatic measurement, easy and fast operation, accurate and reliable, the instrument adopts large-capacity rechargeable lithium battery, has data storage, USB interface data upload and export functions, and the instrument has Bluetooth communication that supports the Android system. You can test or view test records on your mobile phone.This instrument adopts a special metering chip, which has very high electrical parameter measurement accuracy, can display changes in the parameters to be tested in real time, and has the function of saving data with one key.The product is simple to operate, easy to use, fast measurement, stable, and reliable results. It is a new generation of instruments that specialize in electrical energy metering and relay protection of power systems and conduct on-site testing of secondary circuits. It is also widely used in electrical equipment manufacturing, petrochemical industry, iron and steel metallurgy, railway electrification, scientific research and teaching and other departments.

1. The stand-alone machine can be used as a three-phase voltammeter, load tester, and harmonic analysis.
2. The dual-machine can wirelessly and synchronously test current, voltage, phase and other parameters at different locations of the substation; it is used to test the voltage drop of the PT secondary side line and calculate the voltage drop error and measurement error of the PT.Can be used for PT wireless nuclear phase.
3. When four machines are used at the same time, one can be set as the host and the other three as slaves, which is particularly suitable for multi-point synchronous testing, which is flexible and convenient to use.
4. The instrument adopts GPS satellite timing synchronization technology to ensure the synchronous measurement of PT secondary pressure drop and the accuracy of PT nuclear phase.
5. The surveying personnel only need to perform wiring operations, the instrument automatically measures, and the data is updated in real time to facilitate on-site analysis.
6. The instrument adopts complete isolation technology to avoid safety accidents.
7. 5-inch touch color screen, Chinese interface, direct function and simple operation.
8. Bluetooth communication function.
9. USB communication interface.
10. Rechargeable lithium battery.

1.Measurement Range &  Basic Error

2.General Specifications