Callide C4 begins its return to service journey

A short note with a snapshot from the ez2view ‘Notification’ widget alert generated with Callide C5 beginning its return to service journey at 10:21 (NEM time) on Tuesday 20th January 2026:

Roughly 20 minutes after receiving this alert, we also note AEMO’s Market Notice 133022 as follows:

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MARKET NOTICE
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From :              AEMO
To   :              NEMITWEB1
Creation Date :     20/01/2026     10:41:28

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Notice ID               :         133022
Notice Type ID          :         POWER SYSTEM EVENTS
Notice Type Description :         Emergency events/conditions
Issue Date              :         20/01/2026
External Reference      :         Update – Non-credible contingency event – QLD region – 15/01/2026

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Reason :

AEMO ELECTRICITY MARKET NOTICE.

Update – Non-credible contingency event – QLD region – 15/01/2026

Refer AEMO Electricity Market Notice 132851

At 1016 hrs the Callide Power Station C4 unit was returned to service.

The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.

Manager NEM Real Time Operations

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END OF REPORT
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Note that CS Energy had attributed the cause of the coincident trip as ‘human error’, and said it had put steps in place to prevent its re-occurrence.