RENERGY RN8302B(V3)

Renergy three-phase metering chip V3 series (including models RN8302B, RN8302C, RN8306, RN7302, and RN7306) is a multi-function, high-precision, high-reliability, low-power three-phase metering dedicated chip, widely applicable to various meter designs in smart meters, energy consumption analysis, power monitoring, electrical safety, and other fields. It supports current transformers, full manganin shunts, and Rogowski coils. Typical applications include: State Grid smart meters (CT, full manganin shunt), State Grid IoT meters (CT, full manganin shunt), and State Grid DIN rail meters (Rogowski coil).

• Metering:
  • Full-wave and fundamental active energy metering; nonlinearity error <0.1% within 10000:1 dynamic range; meets Class 0.5S and Class 0.2S active energy meter accuracy requirements; bidirectional metering supported; energy accumulation mode selectable among algebraic sum, absolute sum, forward-only, or reverse-only; energy accumulation source selectable between instantaneous power and half-cycle power; compliant with IEC62053-22:2020, GB/T 17215.321-2021, and OIML R 46-1/2:2012
  • Full-wave and fundamental reactive energy metering; nonlinearity error <0.1% within 10000:1 dynamic range; bidirectional metering supported; energy accumulation mode selectable among algebraic sum, absolute sum, forward-only, or reverse-only; energy accumulation source selectable between instantaneous power and half-cycle power; compliant with IEC62053-23:2020, GB/T 17215.323-2008, and OIML R 46-1/2:2012
  • Full-wave and fundamental apparent energy; apparent energy accumulation source selectable between instantaneous power and half-cycle power
  • Active and reactive power direction indication; four-quadrant detection supported
  • No-load start mode: power or current selectable, adjustable threshold
  • Adjustable meter constant
  • Fast pulse count for active, reactive, and apparent energy
  • 5 configurable CF pulse outputs (full-wave/fundamental active/reactive/apparent selectable)
  • Per-phase metering supported; 3 configurable per-phase CF pulse outputs (full-wave/fundamental active/reactive/apparent selectable)
  • 12 user-defined power registers and 3 user-defined CF pulse outputs with independent pulse constants; harmonic energy meter support; compliant with GB/T 17215.302-2013
  • RMS and PQS apparent power and energy metering; compliant with IEEE 1459-2010, GB/T 18216_12-2010, and latest standards
• Measurement:
  • Full-wave and fundamental active, reactive, and apparent power; compliant with IEEE 1459-2010, GB/T 18216_12-2010, and latest standards
  • Per-phase half-cycle updated full-wave active and reactive power; update mode selectable between zero-crossing and half-cycle count; compliant with IEC61000-4-30:2008
  • Per-phase half-cycle updated fundamental active and reactive power; update mode selectable between zero-crossing and half-cycle count; compliant with IEC61000-4-30:2008
  • Full-wave, fundamental, and harmonic three-phase voltage and current RMS values
  • Fundamental instantaneous RMS updated at 8K rate
  • Two sets of half-cycle RMS: metering channel and synchronous sampling channel
  • Three-phase voltage vector sum and current vector sum RMS output; per-phase (A/B/C) contribution to voltage vector sum is configurable
  • Full-wave and fundamental power factor
  • Line frequency measurement; measurement error <0.02%; update period selectable between 1-cycle and 32-cycle
  • Per-phase voltage and current phase angle; measurement error <0.02°; update period selectable between 1-cycle and 32-cycle
  • Seven zero-crossing detection channels; zero-crossing threshold configurable
  • Voltage phase sequence error detection
  • Voltage loss indication; threshold configurable
  • Voltage sag detection
  • Overvoltage and overcurrent detection
  • Rogowski coil support
• Power Quality:
  • Waveform data for power quality analysis and non-intrusive load identification; multi-channel combination with variable sample counts supported
  • Class S power quality analysis; compliant with IEC61000-4-30:2008; includes harmonics, interharmonics, unbalance, voltage fluctuation, flicker, swell, and sag
  • Two sets of half-cycle RMS measurement for swell/sag calculation
  • Fault recording supported
  • Flicker calculation per IEC standards; instantaneous flicker result output supported
• Waveform Output:
  • Various instantaneous, synchronous, full-wave, fundamental, voltage, current, and power waveform data
  • Up to 512 samples/cycle fixed sample rate data or synchronous sampling data; automatic harmonic gain compensation across the full passband; DC offset correction, phase correction, and gain correction for waveform data
  • 896-address ADC data buffer (3 bytes per address); multi-channel combination with variable sample counts supported
  • SPI burst read of up to 64 consecutive address units (3 bytes per address) from waveform buffer
• Error Auto Temperature Compensation (ECT):
  • SAR & TPS temperature measurement; meets ±2°C temperature sensing requirement
  • Hardware automatic compensation, semi-automatic compensation, and software compensation modes; linear gain compensation for high/low temperature ranges
• Anti-Tamper:
  • Neutral current measurement; neutral current ADC PGA gain up to 16×; shunt resistor (manganese copper) support
  • Low-power mode NVM2 for current comparison pre-detection; 4-level adjustable threshold; power consumption <150μA
  • Low-power mode NVM1 for low-power current RMS measurement; power consumption <2.5mA
  • Total voltage loss active reporting; typical average power consumption only 7μA
• Software Calibration:
  • Seven-channel ADC gain correction
  • Seven-channel ADC phase correction; Phase A, B, C current channels support segmented phase correction
  • Power gain correction
  • Segmented phase correction for active and reactive power
  • Offset correction for active power, reactive power, and RMS
  • AUTODC DC offset correction
  • Checksum register with automatic calibration data verification
  • Pulse doubling function for small-signal calibration
• Meets new test requirements in OIML R 46 for peaked waveform, flat-top waveform, etc.
• Meets dynamic load metering requirements and rapid load current variation test requirements
• Applicable to 3-phase 3-wire and 3-phase 4-wire systems; adaptive 3-phase 3-wire/4-wire detection supported
• Power supply monitoring function
• Built-in 1.25V ADC voltage reference; typical temperature coefficient ±5ppm/°C; external reference also supported
• High-speed SPI interface up to 3.5Mbps; burst read of waveform buffer and burst read of registers supported
• HSDC interface for high-speed waveform data transmission up to 4.096Mbps; CRC verification supported
• Two interrupt output pins
• Crystal: 8.192MHz; on-chip 10MΩ bias resistor
• Supply voltage range: 3.3V±10%
• Operating temperature range: -40°C~+85°C
• LQFP32/LQFP44/LQFP48 green package
• Compliant with the test requirements of EU RoHS Directive 2011/65/EU as amended by Directive (EU) 2015/863

• Smart meters
• Energy consumption analysis
• Power monitoring
• Electrical safety
• State Grid smart meters (current transformer, full manganin)
• State Grid IoT meters (current transformer, full manganin)
• State Grid DIN rail meters (Rogowski coil)
• Conventional three-phase metering solutions
• Low-cost, compact electrical measuring instruments
• Three-phase manganin meters
• Three-phase metering applications with advanced requirements: harmonic metering, power quality, topology identification, and non-intrusive load identification
• DC voltage measurement