Planned Voltage Reduction Test on January 21

Niagara Peninsula Energy Inc. has been notified that the Independent System Electricity Operator (IESO) will be conducting a mandatory voltage reduction test in the NPEI service territory on January 21, 2025. 

A three per cent reduction test will occur between 9:00 a.m. and 10:00 a.m. EST followed by a five per cent reduction test between 1:00 p.m. and 2:00 p.m. EST.

A voltage reduction is one tool used by the IESO to manage the reliability of Ontario’s power system when demand for electricity exceeds available supply. The IESO performs voltage reduction tests to simulate emergency actions and to measure the load reduction resulting from voltage reductions. Voltage reductions lower demand quickly and minimize the likelihood of service interruptions, helping the IESO maintain the reliability of Ontario’s power system during a variety of unplanned occurrences.

These voltage reduction tests are performed every 18 months, and have been for over 20 years.

Customers will likely notice no difference or interruption to their power-supply during the test, as supplied voltages are still expected to be within established industry standards for electrical equipment used by residential and commercial consumers. If you do experience an issue, please report it to NPEI by calling 1-877-270-3938.