Eskom system constraint message

At approximately 08h00 this morning we had a multiple unit trip at an Eskom power station which resulted in an under-frequency incident. In order to protect the grid, customers in certain areas in the country experienced a lower failure for approximately 45 minutes. All the load from this incident has since been restored. An under frequency load reduction is a normal automatic operation taken when a sudden drop in generation capacity is encountered, in order to protect the system. We apologise for any inconvenience caused to affected customers.

The additional loss in generation capacity,  has created an additional strain on the already tight system. While we  are taking all necessary actions to avoid load shedding, we ask all customers/employees to assist by using electricity sparingly particularly during five to nine, with the most critical time being 5:30pm – 6:30pm

Let us switch off air-conditioners, geysers, pool pumps and all non-essential appliances especially between 5 & 9 pm tonight.

This is a pre-warning that loadshedding might be a possibility and a warning could be given to your members and affiliates.  It would be important that each member/affiliate knows where they get their electricity from (Eskom or the Local Municipality) and then obtain the loadshedding schedules to familiarize themselves on if/and when they are on the load shedding schedules.

The detailed Eskom scheduled load shedding schedules are available on the Eskom website,

Please note that we have affected the Eskom Winter schedules from 1 June 2014 which is briefly explained below for your reference.

One major change this year is that winter schedules are all day schedules and not a peak only schedule.

The summer All-Day load shedding schedules were designed with a given customer scheduled at the same time from day to day. This was done because during summer the risk of load shedding is not higher over peak than during the rest of the day and it provided for greater predictability and simplicity.

During winter this system is patently unfair to those customers scheduled over peak since the risk of only load shedding during peak is much higher.

The regular repeated times were replaced with rotating times throughout a single week.  That is, customers would have a different time of shedding for every day in a given week that they would be shed, with one of the times being within the peak period rather than none or all, as is the case in summer. This resulted in a schedule that is much more fair in winter than previously.

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