Islington Substation is an electrical substation on Ohau Drive in Islington, Christchurch, rated 5.0 from 1 review. A substation like this is part of the wider power grid rather than a place to visit: its job is to step voltage up or down between the high-voltage transmission network and the lower voltage that actually reaches homes and businesses nearby, keeping the supply stable across the suburb. They're unstaffed and fenced off for good reason, since the equipment inside carries voltages that are lethal at close range, so there's nothing to see or do here beyond viewing it from outside the perimeter. A low hum from the transformers is normal and not a fault, and any planned outage affecting the area usually gets scheduled and announced around maintenance work here rather than happening without warning. On Ohau Drive in Islington, this substation quietly does that job for the surrounding part of Christchurch.