1、 Product Overview

Multi functional power meters are high-precision, high reliability, and cost-effective intelligent instrument products designed for applications such as power monitoring, intelligent monitoring, and measurement assessment in power systems, industrial and mining enterprises, public facilities, and intelligent buildings. This series of instruments adopts high-precision dedicated AD chips and high reliability MCU design, which can measure all electrical parameters in a three-phase power grid, such as three-phase voltage, three-phase current, active power, reactive power, power factor, grid frequency, bidirectional energy metering, THD, etc. It has standard energy pulses and RS485 communication interfaces, and can choose multiple expansion function modules (switch input/output, analog output, multi rate energy statistics, harmonic analysis, etc.).

2、 Functional wiring diagram

3、 Voltage and current wiring diagram

4、 Wiring instructions

When selecting voltage ranges of 3 × 57.7/100V and 3 × 100V, external PT should be considered. For ease of maintenance, it is recommended to use a wiring harness.

When selecting current ranges of 1 (2) A and 1.5 (6) A, an external CT should be used. If other instruments are connected to the CT used, the wiring should be in series. Before removing the current input connection of the product, be sure to disconnect the CT primary circuit or short-circuit the secondary circuit. For maintenance purposes, it is recommended to use a wiring harness.

▲ Ensure that the input voltage and current correspond, the phase sequence is consistent, and the direction is consistent, otherwise errors in the values and symbols of power and electrical energy may occur.

The instrument can operate in three-phase four wire or three-phase three wire mode, and users should choose the corresponding wiring method according to the on-site usage situation. Generally, the three-phase three wire method is used when there is no centerline, and the three-phase four wire method is used when there is a centerline. It should be noted that the wiring method on site must be consistent with the wiring method specified in the table, otherwise the measurement data of the instrument will be incorrect.