dim_signal_info.md

---
type: Parquet
title: dim_signal_info
description: Signal catalogue mapping signal_id to metric name, electrical phase, and unit
resource: ./dim/dim_signal_info.parquet
tags: [dimension, signal, catalogue]
timestamp: 2026-07-22T00:00:00Z
---

# dim_signal_info

One row per (signal name, phase) combination. Encodes what each `value_float` in [fact_energy_15m](fact_energy_15m.md) represents.

| Column | Type | Description |
|--------|------|-------------|
| `signal_id` | INTEGER | PK. Surrogate key |
| `signal_name` | VARCHAR | Metric name: `energy_kwh_15m`, `demand_kw`, `avg_power_kw_15m` |
| `phase` | VARCHAR | Electrical phase: `L1`, `L2`, `L3`, or `ALL` (synthetic total) |
| `unit` | VARCHAR | Physical unit of the measurement value |
| `description` | VARCHAR | Human-readable description of the signal |

**Row count:** 12 (3 signals x 4 phases)

**Signal catalogue:**

| signal_id | signal_name | phase | unit | description |
|-----------|-------------|-------|------|-------------|
| 1 | `energy_kwh_15m` | L1 | kWh | Energy consumed during window (phase L1) |
| 2 | `energy_kwh_15m` | L2 | kWh | Energy consumed during window (phase L2) |
| 3 | `energy_kwh_15m` | L3 | kWh | Energy consumed during window (phase L3) |
| 4 | `energy_kwh_15m` | ALL | kWh | Energy consumed during window (all phases) |
| 5 | `demand_kw` | L1 | kW | Average demand over window (phase L1) |
| 6 | `demand_kw` | L2 | kW | Average demand over window (phase L2) |
| 7 | `demand_kw` | L3 | kW | Average demand over window (phase L3) |
| 8 | `demand_kw` | ALL | kW | Average demand over window (all phases) |
| 9 | `avg_power_kw_15m` | L1 | kW | Reliability-weighted mean power (phase L1) |
| 10 | `avg_power_kw_15m` | L2 | kW | Reliability-weighted mean power (phase L2) |
| 11 | `avg_power_kw_15m` | L3 | kW | Reliability-weighted mean power (phase L3) |
| 12 | `avg_power_kw_15m` | ALL | kW | Reliability-weighted mean power (all phases) |