Chint DT862-4 three-phase four-wire electric meter

The Chint DT862-4 three-phase four-wire electric meter is a classic mechanical electric energy meter, specifically designed for industrial and commercial scenarios, and is suitable for the active electric energy metering of three-phase four-wire circuit. The following are its core information and application guidelines:

 I. Core Functions and Technical Parameters

1. **Metering Characteristics**

   - **Measuring Range**: It supports direct connection type (such as 10(40)A, 15(60)A) and mutual inductance type (such as 1.5(6)A), covering the load requirements of small and medium power.

   - **Accuracy Class**: Class 2, meeting the GB/T 15283-1994 standard, with an error range of ±2%.

   - **Voltage Specification**: 3×220/380V (line voltage 380V, phase voltage 220V), suitable for industrial power supply environments.

   - **Frequency Range**: 50Hz, in line with the domestic power grid standard.

2. **Structural Design**

   - **Material**: The shell is made of cold-rolled steel plate, with an IP30 protection level, dustproof and splash-proof.

   - **Dimensions**: The external dimensions of the standard model are 279.5×172×124mm, and the installation hole spacing is 140×106mm, which is suitable for common power distribution cabinets.

   - **Display**: Mechanical counter, with the integer part displayed in a black frame and the decimal part displayed in a red frame, which is intuitive and easy to read.

3. **Environmental Adaptability**

   - **Operating Temperature**: -10°C to +50°C (some models support -25°C to +55°C), adapting to different climatic conditions.

   - **Humidity**: Relative humidity ≤ 85%. Avoid long-term use in high humidity environments.

 II. Application Scenarios and Installation Key Points

1. **Typical Applications**

   - **Industrial Power Distribution**: In scenarios where three-phase loads are concentrated, such as factories and workshops, to measure the total electricity consumption.

   - **Commercial Buildings**: In places that require phase-by-phase metering, such as shopping malls and office buildings.

   - **Agricultural Irrigation**: Suitable for equipment such as water pumps driven by three-phase motors.

2. **Wiring Methods**

   - **Direct Connection Type**: Suitable for circuits with a current ≤ 100A. The incoming live wires are connected to holes 1, 3, and 5, the outgoing wires are connected to holes 2, 4, and 6, and holes 7 and 8 are connected to the neutral wire.

   - **Mutual Inductance Type**: It needs to be matched with a current transformer (such as 200/5A). The incoming live wires are connected to holes 1, 3, and 5. The S1 of the secondary side of the current transformer is connected to holes 2, 4, and 6, the S2 is short-circuited and then grounded, and holes 7 and 8 are connected to the neutral wire.

   - **Notes**:

     - The transformation ratio of the current transformer needs to match the specification of the electric meter (for example, a 1.5(6)A electric meter is matched with a 100/5A current transformer).

     - Copper wires with a cross-sectional area ≥ 2.5mm² should be used for wiring to ensure reliable contact.

3. **Installation Specifications**

   - **Vertical Installation**: The electric meter needs to be vertically fixed, and the inclination ≤ 1° to avoid affecting the metering accuracy.

   - **Spacing Requirements**: Maintain a spacing of more than 50mm from other electrical components for easy heat dissipation and maintenance.

 III. Purchase and After-sales Service

1. **Price Reference**

2. **Suppliers in Hebei Region**

Hebei China Electric

3. **After-sales Service**

   - **Warranty Period**: Usually 1 year, and some channels provide a 3-month warranty.

   - **Fault Handling**: In case of abnormal counting or a stuck dial, you can contact Chint, or submit an after-sales application through the official website.

IV. Alternative Solutions and Extended Functions

1. **Smart Upgrade Options**

   - **Electronic Electric Meter**: For example, the DDSY666 type supports prepayment, RS485 communication, and remote meter reading, which is suitable for users who need intelligent management.

   - **Multifunctional Electric Meter**: The DT862-4K model integrates functions such as time-of-use billing and load recording, and supports the Modbus protocol.

2. **Adaptation to Special Requirements**

   - **Outdoor Environment**: Select the DT862-4 outdoor type with an IP54 protection level, which needs to be customized in advance.

   - **High-precision Metering**: If a Class 1 accuracy is required, the DS862-4 model (380V 1.5(6)A) can be considered.

V. Risk Control and Compliance

1. **Qualification Verification**

   - **Certification**: Require the supplier to provide a 3C certification and a type test report to ensure that the product meets the GB7251.1 standard.

   - **Brand Anti-counterfeiting**: The genuine electric meter shell is printed with a laser anti-counterfeiting label, and the serial number can be queried through Chint's official website.

2. **Contract Terms**

   - **Acceptance Standard**: Clearly specify that it should be calibrated according to the JJG307-2006 regulation, and the error should be ≤ ±2%.

   - **Transportation Insurance**: It is recommended to purchase the wooden box packaging service, and the supplier shall bear the damage during transportation.

VI. Typical Case

In the transformation of a factory's power distribution system, a DT862-4 15(60)A direct connection type electric meter was adopted, matched with a Schneider NSX circuit breaker, to achieve real-time metering of three-phase loads. Purchased through a local distributor in Hebei, the total cost was reduced by 15% compared with direct purchase from the original factory. After installation, it was detected by a third party, and the error rate was +1.2%, which meets the national standard.

If you need further assistance in model selection or obtaining technical documents, you can provide specific current specifications, installation environments and other information, and I will continue to provide support for you.