The YY204E series multifunctional power instrument is a multifunctional intelligent instrument with programmable measurement, display, digital communication, and power pulse transmission and output functions. It can complete power measurement, energy metering, data display, acquisition, and transmission, and can be widely used in substation automation, distribution automation, intelligent buildings, internal enterprise energy measurement, management, and assessment. The various electrical parameters measured by this series of instruments can achieve LED on-site display and remote RS-485 digital interface communication (using MODBUS-RTU communication protocol).
A. The input voltage should not exceed 120% of the rated input voltage (100V or 380V) of the product, otherwise PT should be considered.
B. The standard rated input current is 5A, and if it is greater than 5A, an external CT should be used. If other instruments are connected to the CT used, the wiring should be in series.
C. Ensure that the input voltage and current are wired correctly (according to the standard wiring method of the sample) and the phase sequence is consistent, otherwise power display and energy metering errors may occur.
D. The programming settings of the instrument and the input network NET should be consistent with the wiring method of the measured load, otherwise it may cause the voltage or power displayed by the instrument to be incorrect. When the input network NET is set to three-phase three wire, the voltage measured and displayed is line voltage. When it is set to three-phase four wire, the voltage measured and displayed is phase voltage, and the display of line voltage can be switched.
