Chint Digital Display Multifunctional Meter PD666-3S3

Chint Digital Display Multifunctional Meter PD666-3S3 is an intelligent instrument specially designed for power monitoring and energy metering, suitable for scenarios such as industrial automation and intelligent power distribution.

 I. Core Functions and Parameters

1. **Measurement Range*Chint AC contactor*  

   It supports three-phase voltage (380V), current (5A), active/reactive power, frequency, power factor, and four-quadrant energy metering. It can monitor harmonic content (total harmonic distortion rate THD) in real-time and has the function of storing positive and negative active energy.

2. **Communication and Protocol*Chint moulded case circuit breaker*  

   - Equipped with a standard RS485 interface, supporting Modbus RTU protocol (default parameters: 9600bps, 8 data bits, 1 stop bit, no parity).  

   - The register mapping is clear. For example, voltage data is stored in 40001-40002 (32-bit floating point), current data in 40003-40004, and power data in 40005-40010, etc.  

   - It supports networking with PLC (such as Siemens S7-1200) or upper computer to realize remote data collection and control.

3. **Expansion Functions**  

   - Optional analog output (4-20mA), digital input/output (supporting alarm threshold setting).  

   - Built-in hardware RTC (real-time clock), supporting multi-rate energy metering.

II. Installation and Dimensions

- **Overall Dimensions**: 96×96×100mm (width × height × depth), mounting hole size 96×96mm, suitable for standard distribution box DIN rail installation.  

- **Wiring Mode**: Three-phase three-wire or four-wire connection, requiring external CT/PT (current/voltage transformer) to expand the range.  

- **Environmental Requirements**: Operating temperature -10℃~+45℃, storage temperature -25℃~+70℃, meeting IP54 protection level.

 III. Application and Configuration

1. **Typical Scenarios**  

   - Monitoring of incoming/outgoing lines in low-voltage distribution cabinets, replacing traditional pointer instruments.  

   - Energy consumption analysis of industrial equipment, supporting integration with SCADA systems via Modbus protocol.

2. **Parameter Setting**  

   - Enter the menu through the panel buttons to configure parameters such as CT/PT transformation ratio, alarm threshold, and communication address.  

   - Supports password protection (default password 701) to prevent unauthorized modification.

3. **Debugging Tools**  

   - Use general tools such as Modbus Poll to test communication, or realize data interaction through PLC programming (such as the MB_MASTER instruction of Siemens S7-1200).

IV. Purchase and Certification  

- **American Channels**: Available through cross-border e-commerce, WhatsApp: 0086-13811255435

V. Notes

1. **Wiring Safety**: Cut off the power supply before installation to ensure that the CT secondary side is not open and the PT secondary side is not short-circuited.  

2. **Protocol Compatibility**: The Modbus register address must be consistent with the equipment manual to avoid data reading errors.  

The core functions of Chint Digital Display Multifunctional Meter PD666-3S3 can be summarized into the following eight categories, covering key requirements such as power monitoring, data interaction, expansion control, and environmental adaptation:

 I. High-Precision Power Parameter Measurement

1. **Basic Electrical Parameters**: Real-time monitoring of three-phase voltage (0-600V), current (0-5A), active/reactive power, frequency (45-65Hz), and power factor, with an accuracy of 0.5 class.

2. **Harmonic Analysis**: Supports measurement of voltage/current total harmonic distortion rate (THD) (resolution 0.1%) and can display 2-31st harmonic components, meeting harmonic management requirements.

3. **Energy Metering**:

   - Cumulative positive and negative active energy (resolution 0.01kWh), supporting four-quadrant reactive energy storage (resolution 0.01kvarh).

   - Multi-rate energy metering function (requires expansion module), which can set 4 rate periods to meet time-of-use electricity price management.

II. Intelligent Data Interaction Capability

1. **Communication Protocol**:

   - Standard RS485 interface, supporting Modbus RTU (default) and DL/T645-2007 dual protocols, with a communication rate of 1200-19200bps adjustable.

   - Clear register address mapping (e.g., voltage data stored in 40001-40002), compatible with PLC systems such as Siemens S7 and ABB AC500.

2. **Remote Control**:

   - Supports remote data reading, parameter setting (such as CT/PT transformation ratio), and reset of energy cumulative value through communication commands.

   - Optional 4-channel digital input (dry contact) for monitoring the status of external equipment (such as circuit breaker opening/closing signals).

 III. Flexible Expansion and Alarm Functions

1. **Function Expansion Modules**:

   - **Analog Output**: 2 channels of 4-20mA transmission output (0.5 class accuracy), which can be associated with any measurement parameter (such as converting current signals to 4-20mA for DCS system collection).

   - **Digital Output**: 2 channels of relay contacts (AC250V/2A), which can set alarm thresholds such as overvoltage/undervoltage and overload to trigger sound and light alarms or linkage tripping.

2. **Multi-Level Alarm Mechanism**:

   - Supports first-level early warning (e.g., LED flashing when remaining power < 20%) and second-level tripping (e.g., cutting off the load when current > 110% rated value), with adjustable delay time of 0.1-30 seconds.

   - Alarm events are automatically stored (the latest 10 records), and historical alarm data can be queried through the communication interface.

IV. User-Friendly Operation and Display

1. **Interface Design**:

   - 96×96mm large LCD display, supporting parameter cyclic display (cycle 1-10 seconds adjustable), with backlight brightness adjustable manually/automatically.

   - Key lock function (default password 701) to prevent misoperation, and supports infrared remote control (optional) for quick switching of display interfaces.

2. **Data Recording**:

   - Built-in hardware RTC (real-time clock), supporting power-off data storage for 10 years, with energy data update cycle ≤ 1 second.

   - Can store monthly frozen data (voltage, current, energy, etc.) for the last 12 months, used for energy consumption trend analysis.

V. High-Reliability Design

1. **Anti-Interference Ability**:

   - Complies with IEC 61000-4 electromagnetic compatibility standards, able to withstand 4kV surge impact and 1000V/m radio frequency electromagnetic field interference.

   - Wide temperature operating range (-10℃~+45℃), humidity ≤95%RH without condensation, adapting to complex industrial field environments.

2. **Safety Protection**:

   - Wiring terminals with anti-misinsertion design, CT secondary side short-circuit protection (built-in 0.5A quick fuse).

   - Shell with IP54 protection level, dustproof and splash-proof, suitable for installation in distribution boxes.

VI. Industry Adaptability

1. **Application Scenarios**:

   - Monitoring of incoming/outgoing lines in low-voltage distribution cabinets, replacing the traditional combination of pointer meters and energy meters, saving 30% installation space.

   - Energy consumption analysis of industrial equipment (such as central air conditioners, water pumps), supporting seamless integration with SCADA systems via Modbus protocol.

2. **Customization Support**:

   - Can customize display parameters (such as only displaying active power and energy), communication protocols (such as Profibus DP), and shell color according to needs.

   - Provides 3C and CE certified versions to meet domestic and foreign market access requirements.

VII. Convenient Debugging Tools

1. **Local Configuration**:

   - Panel buttons can directly set CT/PT transformation ratio (supporting 1-9999 times), alarm threshold, communication parameters, etc., without external computers.

   - Supports automatic calibration function (requires special calibrator), with a recommended calibration cycle of once a year.

2. **Remote Debugging**:

   - Modbus Poll software can be used to quickly verify communication status, supporting batch parameter import and export (CSV format).

   - Chint officially provides PC-side configuration software (PDConfig), supporting graphical parameter setting and firmware online upgrade.

VIII. Economic Advantages

1. **Cost Optimization**:

   - Integrating measurement, metering, and communication functions, a single meter replaces voltmeters, ammeters, energy meters, and communication modules in traditional solutions, reducing the overall cost by 40%.

   - Supports DIN rail + panel embedded dual installation methods, reducing installation auxiliary materials and labor costs.

2. **Maintenance Convenience**:

   - Modular design (display module and measurement module can be separated), enabling quick replacement of spare parts in case of failure, with MTTR (mean time to repair) < 30 minutes.  

Typical Application Cases

- **Power Distribution Transformation in a Certain Automobile Factory**: 50 PD666-3S3 units were deployed to monitor energy consumption of workshop equipment, and data was uploaded to the energy management system through Modbus TCP protocol, realizing real-time load monitoring and saving about 120,000 yuan in electricity bills annually.

- **UPS Monitoring in a Certain Data Center**: Using analog output to convert UPS input/output current into 4-20mA signals, which are connected to the BMS system to realize early warning of battery pack health status.