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.

1. Core Functions and Parameters
2. Measurement RangeChint 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 ProtocolChint 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. Zum Beispiel, 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.

1. 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).

1. Purchase and Certification

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

1. Notes
2. 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.
3. 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:

1. High-Precision Power Parameter Measurement
2. 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.
3. 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.
4. 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.

1. Intelligent Data Interaction Capability
2. 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.

1. User-Friendly Operation and Display
2. 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.

1. High-Reliability Design
2. 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.

1. Industry Adaptability
2. 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.