Planned Voltage Reduction Test - July 18, 2019

Posted On Tuesday July 02, 2019

Energy+ Inc. has been advised by the Independent System Operator (IESO) that a system voltage reduction test is scheduled for Thursday, July 18, 2019, as part of mandatory testing of the IESO emergency operating measures.  The province-wide test will consist of two voltage reduction exercises of approximately one hour each in duration. The first will be a 3% voltage reduction exercise from 9:00 EST to 10:00 EST. The second voltage reduction exercise of 5%, will take place from 13:00 EST to 14:00 EST. 

What is a voltage reduction?

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 every 18 months to simulate emergency actions and to measure the load reduction resulting from voltage reductions of 3% and 5%.

What is the impact of a voltage reduction on consumers?

Most consumers will not notice voltage reductions, as supplied voltages are still expected to be within established industry standards for electrical equipment used by residential and commercial consumers. Voltage reductions have been performed in the past, as part of the IESO’s routine testing protocols and, under extreme circumstances, to prevent blackouts. If you have not noticed any impact on your equipment in the past, you should not notice it during this test.

Additional information about the IESO voltage reduction test can be found on the IESO’s website.

Customers with questions about the IESO voltage test can contact our Customer Care team Monday to Friday from 8:30 am to 4:30 pm.

Phone: (519) 621-3530; 519-442-2215 or toll-free 1-877-871-2215