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Building power monitoring

power monitor online by Rafael Costa

Incoming supply for the whole building. Tenants ask what happened. Now I can tell them.

Latest Reading

Supply voltage

226.6 V

Minimum voltage

222.6 V

Frequency

50 Hz

Harmonic distortion

3 %

Mains available

100 %

Outages

0

Time without mains

0 min

Voltage sags

0

Last updated: 9/29/2026, 6:31:16 PM

Insights

↑ rising ↗ trending up → stable ↘ trending down ↓ falling L = low, ~ = avg, H = high anomaly

Historical Plot

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Telemetry Data

Live
TimeSupply voltage (V)Minimum voltage (V)Frequency (Hz)Harmonic distortion (%)Mains available (%)Outages Time without mains (min)Voltage sags
9/29/2026, 6:31:16 PM226.6 V222.6 V50 Hz3 %100 %00 min0
9/29/2026, 6:16:08 PM224.6 V192.5 V50.01 Hz3 %100 %00 min1
9/29/2026, 6:01:04 PM225.7 V223.3 V50.01 Hz3.1 %100 %00 min0
9/29/2026, 5:45:56 PM225.8 V223.4 V49.99 Hz3.2 %100 %00 min0
9/29/2026, 5:30:48 PM225.8 V223.1 V50.01 Hz3.4 %100 %00 min0
9/29/2026, 5:15:41 PM225.2 V222.3 V49.99 Hz3.4 %100 %00 min0
9/29/2026, 5:00:32 PM223.9 V189.3 V50 Hz3.5 %100 %00 min1
9/29/2026, 4:45:24 PM225.7 V223.5 V50 Hz3.6 %100 %00 min0
9/29/2026, 4:30:16 PM225.6 V222.9 V50 Hz3.6 %100 %00 min0
9/29/2026, 4:15:08 PM225.4 V222.9 V50 Hz3.9 %100 %00 min0
9/29/2026, 3:44:55 PM224.5 V194.6 V49.99 Hz4.1 %100 %00 min1
9/29/2026, 3:29:47 PM225.6 V224.3 V50.01 Hz4.1 %100 %00 min0
9/29/2026, 3:14:40 PM227.5 V223.4 V50 Hz4.2 %100 %00 min0
9/29/2026, 2:59:30 PM226.9 V223.1 V50 Hz4.4 %100 %00 min0
9/29/2026, 2:44:23 PM225.8 V223.5 V49.99 Hz4.4 %100 %00 min0
9/29/2026, 2:29:17 PM226.2 V196.4 V49.98 Hz4.5 %100 %00 min1
9/29/2026, 2:14:10 PM226.6 V224 V50.02 Hz4.6 %100 %00 min0
9/29/2026, 1:59:05 PM226.7 V222.4 V49.98 Hz4.7 %100 %00 min0
9/29/2026, 1:43:58 PM228.1 V224.6 V50 Hz4.8 %100 %00 min0
9/29/2026, 1:28:51 PM228.1 V224 V50 Hz4.7 %100 %00 min0
9/29/2026, 1:10:13 PM226.6 V198.1 V50 Hz4.7 %100 %00 min1
9/29/2026, 12:55:08 PM228 V223.9 V49.99 Hz4.6 %100 %00 min0
9/29/2026, 12:40:00 PM228.8 V225.3 V50.01 Hz4.7 %100 %00 min0
9/29/2026, 12:24:53 PM229.4 V226.7 V50.01 Hz4.7 %100 %00 min0
9/29/2026, 12:09:47 PM229.7 V227.4 V50 Hz4.6 %100 %00 min0