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UPS and power quality

power monitor online by Nadia Haddad

Monitoring at the board. We had equipment failing and nobody could say why. Turned out to be sags, not the equipment.

Latest Reading

Supply voltage

237.1 V

Minimum voltage

235.1 V

Frequency

50 Hz

Harmonic distortion

4.5 %

Mains available

100 %

Outages

0

Time without mains

0 min

Voltage sags

0

Last updated: 8/8/2026, 1:52:59 PM

Insights

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

Historical Plot

Drag on chart to zoom in

Telemetry Data

Live
TimeSupply voltage (V)Minimum voltage (V)Frequency (Hz)Harmonic distortion (%)Mains available (%)Outages Time without mains (min)Voltage sags
8/8/2026, 1:52:59 PM237.1 V235.1 V50 Hz4.5 %100 %00 min0
8/8/2026, 1:42:58 PM237.3 V236 V50 Hz4.6 %100 %00 min0
8/8/2026, 1:32:56 PM237.2 V235.2 V50 Hz4.8 %100 %00 min0
8/8/2026, 1:22:55 PM238.6 V235.3 V50.01 Hz4.7 %100 %00 min0
8/8/2026, 1:12:54 PM238.2 V234.4 V50.01 Hz4.7 %100 %00 min0
8/8/2026, 1:02:53 PM236.4 V202 V50.01 Hz4.6 %100 %00 min1
8/8/2026, 12:52:51 PM235.9 V206.2 V49.99 Hz4.7 %100 %00 min1
8/8/2026, 12:42:50 PM238.6 V236.4 V49.99 Hz4.7 %100 %00 min0
8/8/2026, 12:32:49 PM239.2 V235.7 V50.01 Hz4.7 %100 %00 min0
8/8/2026, 12:22:48 PM237.5 V199.9 V50 Hz4.7 %100 %00 min1
8/8/2026, 12:12:46 PM238.6 V234.9 V50.01 Hz4.5 %100 %00 min0
8/8/2026, 12:02:45 PM238.7 V236.7 V50 Hz4.6 %100 %00 min0
8/8/2026, 11:52:42 AM240 V237.7 V50 Hz4.5 %100 %00 min0
8/8/2026, 11:42:41 AM239.5 V237.6 V49.99 Hz4.6 %100 %00 min0
8/8/2026, 11:30:29 AM240.1 V237.5 V50 Hz4.5 %100 %00 min0
8/8/2026, 11:20:28 AM239.3 V212.8 V49.98 Hz4.4 %100 %00 min1
8/8/2026, 11:10:27 AM240.4 V238.1 V50 Hz4.4 %100 %00 min0
8/8/2026, 11:00:26 AM241 V238.6 V50.01 Hz4.3 %100 %00 min0
8/8/2026, 10:50:23 AM240.2 V238.2 V49.99 Hz4.3 %100 %00 min0
8/8/2026, 10:40:20 AM240.7 V238.3 V50.01 Hz4.3 %100 %00 min0
8/8/2026, 10:30:19 AM240.8 V237.3 V49.99 Hz4.1 %100 %00 min0
8/8/2026, 10:20:18 AM241.1 V237.9 V49.99 Hz4.1 %100 %00 min0
8/8/2026, 10:10:17 AM241.1 V239 V49.99 Hz4.1 %100 %00 min0
8/8/2026, 10:00:16 AM241 V239.5 V49.99 Hz3.9 %100 %00 min0
8/8/2026, 9:50:13 AM241.1 V238.3 V50 Hz3.8 %100 %00 min0