L2-PDM-MON ESSENTIAL POWER ENERGY Level 2 · hardware

Power Monitoring & Metering

Per-System Power Consumption Monitoring and Metering Network

The per-system power consumption monitoring and metering network is a distributed sensor array that provides electrical observability across the lunar power distribution grid. Utilizing Hall-effect current sensors, precision thin-film voltage dividers, and temperature probes on each circuit, the network samples electrical parameters at 1000 Hz with ±1 percent accuracy to feed real-time load management and fault protection subsystems. Operating in the lunar environment requires compensating for sensor calibration drift over a 100-year operational lifetime, maintaining thermal probe accuracy across extreme 300 K temperature swings, and mitigating ionizing radiation effects on Hall-effect sensing elements while managing data compression for ten years of trend telemetry.

Distributed power monitoring and metering network providing per-system consumption tracking, bus health telemetry, and trend analysis across the entire distribution system.

Purpose

Provides full electrical observability of the power distribution network, enabling informed load management decisions, fault detection, and long-term health trending.

Context

Feeds data to L2-PDM-LOAD for scheduling, L2-PDM-PROT for fault detection, and L1-CDH for archival and telemetry, forming the sensory layer of the power distribution system.

Principles

▸You cannot manage what you cannot measure
▸Per-channel metering enables precise load accounting and anomaly detection
▸Historical trend data reveals degradation patterns before failures occur
▸Redundant sensing paths prevent single sensor failures from blinding the system

Typical implementations

▸Hall-effect current sensors on each distribution channel
▸Precision voltage dividers on each bus segment
▸Temperature sensors at high-dissipation points
▸Digital telemetry aggregation via MIL-STD-1553 or SpaceWire bus
▸On-board data logging with circular buffer for historical trends

Lunar considerations

▸Sensor calibration drift over 100 years must be compensated
▸Radiation effects on Hall-effect sensor accuracy
▸Temperature sensor accuracy across 300K thermal range
▸Data volume from comprehensive monitoring requires efficient compression

Specifications

Functional

primary function	Monitor and meter power consumption per subsystem and bus segment, providing real-time and historical electrical observability
inputs	Current flow at each distribution channel, Bus voltage at each segment, Temperature at high-dissipation nodes
outputs	Per-system power consumption data to L2-PDM-LOAD, Electrical measurements to L2-PDM-PROT, Telemetry to L1-CDH
measurement accuracy percent	+/- 1
sampling rate hz	1000
channels	one per distribution circuit
trend storage years	10

Physical

materials	Hall-effect current sensors, Precision thin-film resistors, Rad-hard ADC integrated circuits
vacuum	True
radiation tolerant	True

Operational

thermal range c	-173, 127
lifetime years	100

Interfaces

Provides

→Load Management SystemReal-time load datacritical
Provides per-system power consumption for load balancing algorithms
→Protection & Fault IsolationFault detection datacritical
Provides current and voltage measurements for protection algorithms
→Command & Data HandlingPower telemetryessential
Streams comprehensive power system health data for archival and analysis

Requires

←Power Bus ArchitecturePhysical sensor mountingessential
Sensors mounted on bus bars and distribution circuits
←Distribution Wiring HarnessSensor wiringessential
Signal wiring from distributed sensors to monitoring aggregation nodes