Maximum Demand Electrical ((install)) May 2026

kVA = (kW) / Power Factor OR directly measure kVA = (V × I × sqrt(3))/1000 for 3‑phase Minimal table schema (SQLite example):

Two‑stage shedding + restoration.

+---------------------+------------------+ | Period | Peak Demand (kW) | +---------------------+------------------+ | 2026-04-01 to 07 | 142.3 | | 2026-03-25 to 31 | 138.9 | +---------------------+------------------+ | Condition | Handling | |-----------|----------| | Power loss | Persist buffer & peak to EEPROM. On restart, wait for full window before reliable demand. | | Incomplete window at startup | Use partial window average with a flag. | | Meter rollover | Detect by comparing readings; adjust delta with max meter reading. | | Communication delay | Timestamp each reading; interpolate if needed. | 9. Sample API / Interface (for system integration) // GET /api/max_demand/current maximum demand electrical

# Calculate total kWh in complete window total_kwh = sum(self.buffer) demand_kw = total_kwh / (self.window_size / 60.0) kVA = (kW) / Power Factor OR directly

| Priority | Load Type | Action at demand > limit | |----------|-----------|--------------------------| | 1 (low) | Water heater | Shed first | | 2 | HVAC – stage 2 | Shed second | | 3 (high) | Lighting, critical | Never shed | | Signal | Source | Use | |--------|--------|-----| | Energy pulses (kWh) | Utility meter / CT + energy IC | Calculate delta per sub‑interval | | Voltage, Current | Power quality meter | Compute kVA if PF varies | | Relay outputs | PLC / MCU | Load shedding control | | Real‑time clock | RTC / NTP | Timestamp peaks | | | Incomplete window at startup | Use

"timestamp": "2026-04-14T10:15:00Z", "demand_kw": 134.7, "limit_kw": 150.0, "demand_percent": 89.8, "peak_kw": 148.2, "peak_timestamp": "2026-04-13T18:30:00Z", "warning_level": "none", "shedding_active": false

"limit_kw": 160.0, "warning_threshold_pct": 85, "window_minutes": 15, "auto_reset_peak_on": "monthly"