Earlier in the week, on Tuesday 23/12/2025 at approximately 11:39AM, a transmission level fault occurred. The East region (North-East to be exact) was affected the most, with dip-by values in the range of ~ 30%.
Below were from some our sites in the same affected region at 22kV and LV in Changi and Bedok areas respectively.
When a 230kV fault occurs, a quarter of Singapore will feel the worst dip magnitude (the region where the fault occurs), with the other 3 regions observing shallow voltage dips.
For my home’s PQube3 in the west, it was a non-event, as seen below.
The fault originated from Malaysia’s TNB network (fault on Phase L3).
Singapore is connected to Malaysia at 230kV.