English name: Three-phase multifunctional ammeter product definition: Three-phase multifunctional ammeter mainly measures three-phase current, three-phase voltage, three-phase line voltage, three-phase active power, three-phase reactive power, three-phase apparent power, three-phase total power factor, frequency, three-phase active energy and three-phase reactive energy. It is a comprehensive instrument with RS485 communication interface and Modbus.
Chinese name
Three-phase multifunctional ammeter
Foreign name
Three-phase multifunctional ammeter
function
Measuring three-phase current and three-phase voltage
draft
MODBUS-RTU protocol
quick
navigate by water/air
Matters needing attention in technical parameter measurement function
abstract
Three-phase multifunctional watt-hour meter is a multifunctional intelligent instrument with programmable measurement, display, digital communication and electric energy pulse transmission and output, which can complete electric quantity measurement, electric energy measurement, data display, collection and transmission, and can be widely used in substation automation, distribution automation, intelligent buildings and internal electric energy measurement, management and assessment. The measurement accuracy is 0.5, which realizes LED field display and remote RS-485 digital interface communication, and adopts MODBUS-RTU communication protocol.
technical parameter
parameter
perform
parameter
Input voltage measurement display
network
Three-phase three-wire, three-phase four-wire
voltage
grade
AC 100V, 400V (please specify when ordering).
too many
Duration: 1.2 times immediacy: 2 times/10s
Spread out completely
operation requirement
When all instruments are used for the first time, please check the consistency of the parameters required by the power distribution system where the instrument parameters are located. For example, AC380V and 200A/5A lines need to be equipped with AC400V and 200A/5A meters. Users can also reprogram the instrument according to actual needs. For the same instrument, for 400A/5A lines, it is only necessary to modify the CT ratio of the instrument to 80. In general, the type parameters and factory setting parameters of the instrument are indicated on the label behind the instrument.
After the instrument is correctly configured, the instrument should be correctly wired according to the actual requirements, and the auxiliary power supply, input signal and output signal should be carried out according to the operating instructions in the manual.
Functional output
1. Electric energy metering and pulse output: it provides the functions of electric energy metering, two-way electric energy pulse output and RS485 digital interface to complete the display and remote transmission of electric energy data. The 12 LED in the third row of the instrument shows the secondary data of active energy (positive) and reactive energy (inductive) 1, and the positive active energy data = 369,587.28kwh (degrees) on the right. The energy pulse (resistance signal) of open collector-class optocoupler relay can realize the long-distance transmission of active energy (forward direction) and reactive energy (reverse direction). The total pulse number of the instrument is collected by remote computer terminal, PLC and DI switch acquisition module, so as to realize the cumulative measurement of electric energy. Don't use output method or precise test method of electric energy (national measurement regulation: pulse error comparison method of standard meter).