CHNT DDSU666 Series Single-Phase DIN Rail kWh Meter
Summary
The CHNT DDSU666 series electronic energy meter is designed for power control and energy measurement in various systems, including power supply, communication industry, and construction industry. It serves as a programmable intelligent instrument for real-time measurement and visualization of electrical parameters such as voltage, current, active power, reactive power, frequency, power factor, and electrical energy consumption.
1. Main Functions and Features
- Standard DIN35mm DIN rail mounting with an LCD segment display.
- Measurement Function: Measures voltage, current, frequency, active power, power factor, and active energy.
- Communication Function: Features an RS485 communication interface supporting the DL/T645-2007 protocol and is adaptable to the MODBUS-RTU protocol.
- Multi-Rate Function: Supports four rates, including peak, shoulder, off-peak, and valley rates.
2. Specifications and Model Selection
| Product Function | Model | DDSU666 | DDSU666-E | DDSU666-D | DDSU666-F |
| Voltage Input | Direct Input | 0.8Un ~ 1.2Un | 0.8Un ~ 1.2Un | 0.8Un ~ 1.2Un | 0.8Un ~ 1.2Un |
| Current Input | Direct Input | 5 (60) A | 5 (80) A | 5 (80) A | 1.5 (6) A |
| Voltage, Current, Power, Frequency, Power Factor | NO | SI | NO | SI | |
| Energy | Bidirectional Active Energy Measurement | NO | SI | NO | SI |
| Others | Multi-Rate (Clock) | NO | SI | NO | SI |
| Demand | NO | SI | NO | SI | |
| Impulse Power | SI | SI | SI | SI | |
| Communication Interface | IR | NO | SI | NO | SI |
| RS485 | SI | SI | SI | SI | |
| Display Mode | Only LCD, 6 digits | LCD single line, 7 digits | |||
| Dimensions L x W x H (mm) | 36 x 85 x 66 | 76 x 89 x 74 (4 modules) |
3. Main Technical Performance and Parameters
| Technical Parameters | Index | Details |
| Signal Input | Voltage | Single Phase AC 220V |
| Wiring Mode Voltage Specification | 1.1Un ~ 0.9Un; Extended working voltage range: ~0.8Un 1.2Un | |
| Voltage Circuit Power Consumption | ≤5VA/1W | |
| Resistance | > 500KΩ | |
| Nominal Value (Current) | Direct Input: AC5 (60) A / AC5 (80) A; Input via CT/PT: AC1.5 (6) A | |
| Actual Overload | Actual Overload (CT/PT Input) | Instantaneous: 20Imax, application time 0.5s |
| Actual Overload (Direct Input) | Instantaneous: 30Imax, application time: half cycle of rated frequency | |
| Current Circuit Power Consumption | ≤2VA | |
| Resistance | <20 mW | |
| Frequency | Input Range | (50/60 ± 5%) Hz |
| Clock | Clock Battery Capacity | ≥1200mAh |
| Clock Accuracy (Daily Error) | <0.5 s/d (23 °C) | |
| Measurement Parameters and Grade | Monitor | LCD segment |
| Voltage Class, Current Class, Power Factor Class | Voltage Class 0.5; Current Class 0.5; Power Factor Class 1; | |
| Frequency Class, Active Current Class, Reactive Current Class | Frequency Class 0.5; Active Current Class 1; Reactive Current Class 1; | |
| Active Energy Class | Active Energy Class 1; | |
| Multi-Rate Energy | Supports measurement of multi-rate passive, total active power negative. | |
| Max. Demand Record | Supports Max. demand record of passive, negative total active power; Demand interval and sliding time can be adjusted. | |
| Energy Output | Legitimate Constant | AC200V: AC1.5 (6) A, 6400imp/kWh |
| AC220V: AC5 (60) A / AC5 (80) A, 800imp/kWh | ||
| Pulse Signal Output | Provides 1 set (active energy) optical signal output, and isolated optocoupler open collector electrical pulse output. Pulse length: 80 ms ± 16 ms. | |
| Communication | RS485 | Supports DL/T645-2007 communication protocol, adaptable for MODBUS-RTU communication protocol. Transmission speed: 1200bps, 2400bps, 4800bps, 9600bps can be set, default is 2400bps. |
| IR Communication | Supports DL/T645-2007 communication protocol, customizable for MODBUS-RTU communication protocol. Infrared wavelength: 900nm ~ 1000nm. Communication transmission speed: 1200bps. Communication angle: ≥ ± 15°. Communication distance: ≥4m. |
Wiring Diagrams
The document includes wiring diagrams for '储能' (Energy Storage) and 'BOOST' configurations, showing RJ45 connections and terminal assignments for CHNT meters. The diagrams illustrate the connections for N, N', L, and L' terminals, as well as RS485 communication ports (485A, 485B).
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