The first set of waveforms/trend was from a Low Voltage site in around Jurong Pier area. It captured a voltage variation (of almost 7.3% drop) on the 1/9/2026 10:42PM.
This was caused by a fault at an adjacent 22kV (connected to this LV site by the 66kV -> 22kV – > LV path).
Based on the event trend/waveform here, the fault was likely on the L1-L2 phase.
The same incident was also captured on my home’s PQUBE3 (as a Rapid Voltage Change). My home is a 20-minute drive from this LV site. This proved that the LV site, my home and the faulted site are inter-connected at 66kV.
