Smart Meter Metering Core PCB

This project involves the design and manufacturing of a high-accuracy printed circuit board assembly (PCB) for a residential smart electricity meter. This PCB performs precision energy measurement, data processing, and secure communication for advanced metering infrastructure (AMI) deployment in modern smart grid systems.

Key PCB Specifications:
Base Material: High-reliability FR4 with enhanced tracking resistance and UL 94V-0 rating
Layer Stackup: 4-layer construction with dedicated analog and digital ground planes for noise isolation
Copper Weight: 2 Oz on power sections for current path optimization, 1 Oz on analog sections
Board Thickness: 1.6 mm, standard form factor for meter housing
Surface Finish: ENIG for corrosion resistance and reliable long-term contact performance
Isolation: Reinforced isolation meeting IEC 62052-11 and IEC 62053-21 accuracy standards
Quality Assurance: 100% accuracy calibration and verification across 0.05A to 100A current range

Functional Role:
This PCB delivers precise energy measurement and grid communication:
Energy Measurement: Dedicated metering IC with 22-bit delta-sigma ADCs for 0.2% accuracy across 1000:1 dynamic range
Current Sensing: Precision shunt resistors (Class 0.2) for reliable current measurement without magnetic saturation
Data Processing: ARM Cortex-M0 processor running metering algorithms and communication protocols
Secure Communication: PLC (Power Line Communication) or RF module interface with hardware encryption
Tamper Detection: Magnetic field and cover-open detection for security against meter tampering
Time-of-Use: Real-time clock with battery backup for multi-tariff billing support