1. Product overview

The CG1000U product is a monitoring instrument that integrates a three-phase voltmeter, with a fully digital display and RS485 communication interface to connect the instrument to the computer network of the monitoring center. It is a high-performance and low-cost automation instrument suitable for modern power supply and distribution systems such as industrial and mining enterprises, civil buildings, and building automation in China.

2. Functions & Features

· High accuracy and stability

0.5 level precision, compliant with IEC 60068-1 and 2 standards

Using industrial-grade chips, with strong anti-interference ability and long-term stability without drift

· Easy setup

By setting the PT multiplier through the panel, the primary operating voltage of the distribution system can be intuitively displayed, which is suitable for distribution systems with three-phase three-wire connection or three-phase four-wire connection.

· Intelligent interconnection

Full digital display

RS485 serial interface, ModBus protocol, communication baud rates of 4800 and 9600 are optional.

3. Technical specifications

Calibration signal input: Voltmeter AC100V, 220V, 380V (signal input measurement range: AC 0～500V）

●Allowable over range: Instantaneous: 2 times/1 second, continuous: 1 2 times

●Accuracy：Level 0. 5

●Communication interface: RS485 serial interface, ModBus protocol

Communication baud rates of 4,800 and 9,600 are optional.

●Anti-interference performance (electromagnetic compatibility):

Fast transient pulse group:         GB/T17626.4-1999   Class Ⅲ

Electrostatic discharge:           GB/T17626.2-1998   Class Ⅲ

Voltage sag, short interruption, and voltage changes: GB/TD626.11-1999   Class Ⅲ

Surge (impact):             GB/T17626.5-1999   Class Ⅲ

●Insulation strength:       IEC 60255-5   2KVrms-1min

●Working environment: Working   IEC 60068-1 and 2     0℃ ~ +55℃

Storage   IEC 60068-1 and 2     -25℃ ~ +70℃

Humidity   IEC 60068-1-3       93%RH 40℃

Installation method: Embedded panel

●Hole size：91mmX43mm

●Dimension：96mmX48mmX60mm (excluding terminal length)

●Usage: No corrosive gas and metal dust, altitude<3000 m

●Working power supply and power consumption: AC or DC 85-265V 3VA

4. Applications

Industrial equipment: Real-time monitoring of air compressor and pump voltage to prevent equipment damage.

Commercial use: Stable power supply for supermarket refrigerators and billboards.

Civil safety: Early warning of abnormal voltage in household distribution boxes to protect household appliances.