IESO Plans Routine Voltage Reduction Test

    TORONTO, Jan. 19 /CNW/ - The Independent Electricity System Operator
(IESO) is planning a routine voltage reduction test for Thursday, January 22,
2009. The IESO performs voltage reduction tests every 18 months to simulate
emergency actions and to measure the load reduction resulting from voltage
    The IESO is working closely with transmitters and local distribution
companies to implement a three per cent and a five per cent voltage reduction
across the province.
    "Voltage reduction is an emergency operating measure that the IESO can
use in order to protect the reliability of the power system or avoid power
outages," said Ken Kozlik, Chief Operating Officer of the IESO. "The IESO
always maintains a current set of emergency preparedness procedures, aspects
of which are based on the results of periodic tests such as this voltage
reduction test. We always want to be ready for actual system emergencies."
    The tests, first involving a three per cent reduction in voltage and then
a five per cent reduction in voltage, will last one hour each and take place
during a period of flat load conditions between 9:00AM EST and 3:00 PM EST.
    Electricity consumers should not notice that the test is occurring as the
voltage will remain within the industry standards specified for electrical
equipment used by residential and commercial consumers. Consumers with
questions about the test or who experience problems on January 22 should
contact their local distribution company. A list of local distribution
companies is available at
    More information about voltage reductions is available on the IESO
website at or by contacting customer relations at

    The IESO is responsible for managing Ontario's bulk electricity system
and operating the wholesale electricity market. For more information, visit

For further information:

For further information: Alexandra Campbell, (416) 506-2806

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