DIGITAL ENERGY 3PHASE METER MFM (10-40 Amp)

About DIGITAL ENERGY 3PHASE METER MFM (10-40 Amp)

• Standard Reference: IS 13779:1999 (or latest version)  Static AC Energy Meters.
• Type: Three-Phase, Normal, Multifunction, Static (Electronic) Energy Meter.
• Voltage Rating: 415V  20% (Line to Line) standard for three-phase systems in most countries.
• Current Range: 10A to 60A (direct connection).
• Frequency: 50 Hz  5% (47.5 Hz to 52.5 Hz).
• Metering Functions:
• Active Energy (kWh): Measurement of real power consumption.
• Reactive Energy (kVARh): Measurement of non-working power.
• Apparent Energy (kVAh): Measurement of total power consumption.
• Power Factor (PF): Real-time Power Factor measurement.
• Current (A): Current in each phase.
• Voltage (V): Voltage in each phase (Line to Neutral and Line to Line).
• Frequency (Hz): Frequency of the system.

Electrical Characteristics:

• Voltage Rating:
• 415V (Line to Line).
• 240V (Line to Neutral, for reference in star-connected systems).
• Operating Voltage Range: 80% to 120% of the rated voltage (i.e., 332V to 498V).
• Overload Capacity:
• 1.5 times the rated current (i.e., 90A for a 60A rated meter) for a specified period (typically 1 hour).
• Starting Current:  0.004A (minimum current the meter can measure).
• Rated Current: 10A to 60A (direct connection, no CTs required for currents below 60A).

Accuracy:

• Accuracy Class: Class 1 (1% tolerance for active energy measurement).
• Active Energy (kWh): 1% accuracy at rated load (Class 1).
• Reactive Energy (kVARh): Typically Class 2 (2% accuracy).
• Apparent Energy (kVAh): Measured with accuracy in line with Class 2.
• Power Factor: Accuracy typically within 2%.
• Current Measurement: Accuracy typically within 1% over the range of 10A to 60A.
• Voltage Measurement: Accuracy typically within 1% for the line-to-line and line-to-neutral voltage.
• Frequency Measurement: Accuracy within 0.1 Hz.

Display and Metering Functions:

• Display Type: LCD Digital Display with backlight.
• Display Parameters:
• Energy (kWh): Total active energy consumed.
• Reactive Energy (kVARh): Total reactive energy consumed.
• Apparent Energy (kVAh): Total apparent energy consumed.
• Power Factor: Instantaneous power factor.
• Phase Current (A): Current in each of the three phases.
• Phase Voltage (V): Voltage in each phase (L-N and L-L).
• Frequency (Hz): The system frequency.
• Max Demand: If supported, the maximum demand over a period.
• Time-of-Use (TOU): If the meter supports, it can display TOU data based on pre-set tariffs.
• Display Format: Numeric and clear indication of measurements. Typically, the screen will display multiple parameters simultaneously or allow cycling through them.
• Data Retention: Meter retains data even during power failures.

Communication and Remote Monitoring (Optional Features):

• Communication Interface:
• RS-485 (Modbus RTU) for remote reading and integration into SCADA or Building Management Systems (BMS).
• Pulse Output: For external logging devices.
• Data Logging: For recording energy consumption, maximum demand, and fault events (for models supporting data logging).
• Event Logging: Logs important events such as power failures, tampering attempts, etc.
• Time-of-Use (TOU) Support: The meter can support multiple tariff structures depending on the time of the day.

Environmental and Durability Specifications:

• Operating Temperature Range: -10C to +55C (for normal operation).
• Storage Temperature Range: -40C to +70C (storage).
• Humidity: 95% RH max (non-condensing).
• Protection Class: IP51 or IP54 (dust and splashproof).
• Overvoltage Protection: Protection against surges and spikes according to IEC 61000 standards.

Meter Housing and Safety:

• Material: Flame-retardant, UV-resistant plastic housing.
• Mounting:
• Typically DIN Rail Mountable or wall-mounted (depending on the model).
• Installation: Designed for indoor use, but outdoor models may be available with enhanced IP ratings (IP54).
• Tamper Detection:
• Reverse Phase Detection.
• Phase Loss Detection.
• Voltage/Current Surge Protection.
• Short Circuit Protection: Built-in protection against overload and short-circuit conditions.

Compliance and Standards:

• Compliance: The meter adheres to IS 13779:1999 standards for electronic energy meters.
• Verification & Calibration: The meter undergoes factory calibration and verification against national or international standards.
• Certification: The meter typically comes with a verification certificate from authorized agencies, ensuring compliance with IS 13779.
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Summary Table of Key Parameters:

Conclusion:

This Class 1 Three-Phase Energy Meter designed according to IS 13779 is a highly accurate and reliable solution for measuring energy consumption in industrial, commercial, and residential applications. It offers multifunctional metering, supports remote monitoring, and complies with national standards for accuracy and safety.