TOMZN DTS238-7 Three-Phase DIN Rail KWH Energy Meter User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your TOMZN DTS238-7 Three-Phase DIN Rail KWH Energy Meter. Please read this manual thoroughly before installation and use, and keep it for future reference.

The TOMZN DTS238-7 is a static three-phase four-wire energy meter designed for active energy measurement. It incorporates advanced large-scale integrated circuits and SMT manufacturing technology, offering features such as bi-directional and unidirectional energy measurement, wide voltage, anti-tamper, high accuracy, reliability, large overload capacity, low self-consumption, and small volume.

2. Safety Information

WARNING:

• Installation and operation must be performed by a qualified electrical professional.
• Do not place the device near flammable materials.
• Ensure adequate ventilation during operation.
• Disconnect from power and store properly when not in use for extended periods.
• To avoid danger of suffocation, keep any packaging bags away from babies and children. Do not use packaging bags in cribs, beds, carriages, or playpens. This bag is not a toy.

Always observe local safety regulations and standards when installing and operating electrical equipment.

3. Product Overview

The TOMZN DTS238-7 is a three-phase energy meter designed for DIN rail mounting. It accurately measures and records the electrical energy consumed in a circuit. The meter features an LCD display for easy reading of energy consumption.

4. Specifications

5. Setup and Installation

Important: Installation must be performed by a qualified electrical professional to ensure safety and proper functionality.

1. Mounting: The meter is designed for installation on a standard 35mm DIN rail. Ensure the mounting location is stable, well-ventilated, and free from corrosive gases. The meter should be installed indoors, away from direct sunlight and moisture.
2. Wiring Connection: Connect the equipment strictly in accordance with the provided wiring diagram specifications. The meter supports direct wire connection and does not require external Current Transformers (CTs).
3. Sealing: If the meter is installed in a meter box, ensure proper sealing to protect it from environmental factors.
4. Parameter Adjustment: After connection, adjust any necessary equipment parameters according to the specific requirements of your electrical system.

6. Operating Instructions

The DTS238-7 energy meter continuously measures and displays active energy consumption. Key operational features include:

• Energy Measurement: The meter measures both positive and negative active energy, accumulating energy values without negative energy being subtracted from positive energy.
• LCD Display: The LCD provides a clear digital readout of the total energy consumed (kWh). The display has 6 digits (no decimal).
• LED Indicators: The meter is equipped with LED indicators for each phase (L1, L2, L3), a pulse indicator (PULSE), and a reverse indicator (REV) to show the on/off state of the power on three phases and direction of energy flow.
• Working Principle: The three-phase voltage and current are sampled from the respective sampling circuit and transformed into a suitable signal. This signal is carried into an integrated circuit, which then outputs a pulse signal proportional to the measured power to drive a step-motor counter for energy measurement.

7. Maintenance

The DTS238-7 energy meter is designed for long-term, reliable operation with minimal maintenance. Follow these guidelines to ensure its longevity:

• Cleaning: Keep the meter clean and free from dust. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
• Environmental Conditions: Ensure the operating environment remains within the specified temperature (-25°C to +55°C) and humidity (<75%) ranges. Avoid exposure to direct sunlight, moisture, and corrosive gases.
• Storage: If the meter needs to be stored, keep it in its original packaging in a dry, cool place. Avoid heavy impacts during transportation. When stacking, ensure no more than 7 cartons are stacked, and single-packed meters should not be piled more than 5 meters high.
• Periodic Checks: Periodically inspect the wiring connections to ensure they are secure and free from corrosion.

8. Troubleshooting

If you encounter issues with your energy meter, consider the following common checks:

• No Display/Power:
  • Verify that the power supply to the meter is active and within the rated voltage range (3*220/380V).
  • Check all wiring connections for looseness or incorrect installation.
• Incorrect Readings:
  • Ensure the wiring is correctly connected according to the diagram (L1, L2, L3, N). Incorrect phase or neutral connections can lead to inaccurate measurements.
  • Confirm that the meter is installed in an environment within its specified operating temperature and humidity.
• Pulse Indicator (PULSE) not flashing:
  • This indicates no energy consumption. Verify that a load is connected and drawing power.
• Reverse Indicator (REV) active:
  • This indicates reverse energy flow. Check your wiring connections to ensure correct phase sequence and direction.

If the problem persists after these checks, please contact customer support or a qualified electrician.

9. User Tips

• Wire Compatibility: When connecting the meter, ensure that the wire gauge used is appropriate for the current rating (100A max) to prevent overheating and ensure safe operation. For example, if using 25mm wire, ensure it meets the current carrying capacity requirements for your application.
• Professional Installation: Always prioritize professional installation to guarantee correct wiring and adherence to electrical standards.

10. Warranty and Support

The TOMZN DTS238-7 energy meter comes with a 24-month warranty period from the date of sale. If the product is found to be defective within this period and cannot be repaired, it may be replaced or refunded according to the manufacturer's policy.

For technical support, warranty claims, or further assistance, please contact the TOMZN Official Store or your local distributor.

A detailed user manual in PDF format is available for download: TOMZN DTS238-7 User Manual (PDF)

11. Regulatory Compliance

This device complies with the following applicable regulations and harmonized standards:

• Low Voltage Directive (LVD) 2014/35/EU
• Electromagnetic Compatibility (EMC) Directive 2014/30/EU
• Restriction of the Use of Certain Hazardous Substances (RoHS) Directive 2011/65/EU

The CE mark indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).