Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

This outage has been WITHDRAWN. 25/05/2020 07:00 30/05/2020 16:00 Muswellbrook - Tamworth (88) 330 A credible contingency event during this planned outage could cause: Day: 4 hrs NSW Transgrid Not required Invoked Maintenance Monday Saturday kV Line • Synchronous separation of the Queensland region from the rest of Night: 4 hrs the NEM

A credible contingency event during this planned outage could leave South Australia connected to the NEM only via the South Australian 132 kV network. To maintain system security following this contingency AEMO will need to: 25/05/2020 09:30 25/05/2020 16:30 Day: 8 hrs Issued on SA ElectraNet Tailem Bend - Tungkillo 275 kV Line • Initiate the orderly separation of SA from the rest of the NEM. Invoked Maintenance Monday Monday Night: Not applicable 21/05/2020 • Source increased local regulation FCAS within SA.

During this planned outage power transfer will be restricted across the - South Australia interconnector (Heywood interconnector).

This is a high-impact outage only if the forecast temperature at Red Cliffs is greater than 30 °C During this planned outage power transfer will be restricted 25/05/2020 14:00 25/05/2020 19:00 • Between Victoria and . Day: 2 hrs Being NSW Transgrid Buronga X3 220kV LINE Not required Maintenance Monday Monday • Between South Australia and Victoria on Murraylink Night: No recall assessed A credible contingency event during this planned outage may require: • Load shedding in the Victorian outer grid • Market intervention through issuing of directions.

This is a high-impact outage only if the forecast temperature at Red Cliffs is greater than 30 °C During this planned outage power transfer will be restricted 25/05/2020 14:00 25/05/2020 19:00 Balranald- (X5) 220 • Between Victoria and New South Wales. Day: 1.5 hrs Being NSW Transgrid Not required Maintenance Monday Monday kV line • Between South Australia and Victoria on Murraylink Night: No recall assessed A credible contingency event during this planned outage may require: • Load shedding in the Victorian outer grid • Market intervention through issuing of directions.

A credible contingency event during this planned outage could cause: 26/05/2020 06:00 26/05/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Tuesday Tuesday kV Line Night: No recall assessed the NEM

1 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

A credible contingency event during this planned outage could cause: 27/05/2020 06:00 27/05/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Wednesday Wednesday kV Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 28/05/2020 06:00 28/05/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Thursday Thursday Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 29/05/2020 06:00 29/05/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Friday Friday Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 30/05/2020 06:00 30/05/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Saturday Saturday Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 01/06/2020 06:00 01/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Monday Monday Line Night: No recall the NEM

This outage has been WITHDRAWN. 01/06/2020 07:00 06/06/2020 16:00 Muswellbrook - Tamworth (88) 330 A credible contingency event during this planned outage could cause: Day: 4 hrs NSW Transgrid Not required Invoked Maintenance Monday Saturday kV Line • Synchronous separation of the Queensland region from the rest of Night: 4 hrs the NEM

This is a high impact outage because the recall time is greater than 30 01/06/2020 08:30 01/06/2020 16:00 Strathmore - Ross (8858) 275 kV minutes. Day: 30 mins QLD Powerlink Not required Invoked Maintenance Monday Monday Line A credible contingency event during this planned outage may require Night: Not applicable market intervention through issuing of directions.

A credible contingency event during this planned outage could cause: 02/06/2020 06:00 02/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Tuesday Tuesday Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 03/06/2020 06:00 03/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Wednesday Wednesday Line Night: No recall the NEM

2 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

A credible contingency event during this planned outage could cause: 04/06/2020 06:00 04/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Thursday Thursday Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 05/06/2020 06:00 05/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Friday Friday Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 06/06/2020 06:00 06/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Saturday Saturday Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 09/06/2020 06:00 09/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Maintenance Tuesday Tuesday Line Night: No recall assessed the NEM

This outage has been WITHDRAWN. 09/06/2020 07:00 13/06/2020 16:00 Muswellbrook - Tamworth (88) 330 A credible contingency event during this planned outage could cause: Day: 4 hrs NSW Transgrid Not required Invoked Maintenance Tuesday Saturday kV Line • Synchronous separation of the Queensland region from the rest of Night: 4 hrs the NEM

A credible contingency event during this planned outage could cause: 10/06/2020 06:00 10/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Wednesday Wednesday Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 11/06/2020 06:00 11/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Thursday Thursday Line Night: No recall assessed the NEM

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 11/06/2020 07:30 11/06/2020 16:00 A credible contingency event during this planned outage could: Day: Not applicable VIC AusNet Keilor – Sydenham 500 kV Line Not required Invoked Maintenance Thursday Thursday • Cause a large reduction in generation in Victoria Night: Not applicable • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

A credible contingency event during this planned outage could cause: 12/06/2020 06:00 12/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Maintenance Friday Friday Line Night: No recall the NEM

3 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

A credible contingency event during this planned outage could cause: 13/06/2020 06:00 13/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Saturday Saturday Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 15/06/2020 06:00 15/06/2020 18:00 Tamworth Liddell PS (84) 330 kV Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Monday Monday Line Night: No recall assessed the NEM

This outage has been WITHDRAWN. 15/06/2020 07:00 20/06/2020 16:00 Muswellbrook - Tamworth (88) 330 A credible contingency event during this planned outage could cause: Day: 4 hrs NSW Transgrid Not required Invoked Maintenance Monday Saturday kV Line • Synchronous separation of the Queensland region from the rest of Night: 4 hrs the NEM

A credible contingency event during this planned outage could cause: 16/06/2020 06:00 16/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Tuesday Tuesday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 17/06/2020 06:00 17/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Wednesday Wednesday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 18/06/2020 06:00 18/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Thursday Thursday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 19/06/2020 06:00 19/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Friday Friday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 20/06/2020 06:00 20/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Saturday Saturday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 22/06/2020 06:00 22/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Monday Monday kV Line Night: No recall assessed the NEM

4 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

A credible contingency event during this planned outage could cause: 23/06/2020 06:00 23/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Tuesday Tuesday kV Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 24/06/2020 06:00 24/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Wednesday Wednesday kV Line Night: No recall assessed the NEM

A credible contingency event during this planned outage could cause: 25/06/2020 06:00 25/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Thursday Thursday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 26/06/2020 06:00 26/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Friday Friday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 27/06/2020 06:00 27/06/2020 18:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Invoked Project work Saturday Saturday kV Line Night: No recall the NEM

A credible contingency event during this planned outage could cause: 29/06/2020 07:00 04/07/2020 16:00 Muswellbrook - Tamworth (88) 330 Day: 4 hrs Being NSW Transgrid • Synchronous separation of the Queensland region from the rest of Not required Project work Monday Saturday kV Line Night: 4 hrs assessed the NEM

This is a high impact outage because the recall time is greater than 30 06/07/2020 07:00 14/07/2020 17:00 Bouldercombe - Nebo (821) 275 kV minutes. Day: No recall Being QLD Powerlink Not required Maintenance Monday Tuesday Line A credible contingency event during this planned outage may require Night: No recall assessed market intervention through issuing of directions.

A credible contingency event during this planned outage could leave South Australia connected to the NEM only via the South Australian 132 kV network. To maintain system security following this contingency AEMO will need to: 06/07/2020 08:45 06/07/2020 15:30 Cherry Gardens - Tailem Bend 275 Day: 4 hrs Being SA ElectraNet • Initiate the orderly separation of SA from the rest of the NEM. To be issued Maintenance Monday Monday kV Line Night: Not applicable assessed • Source increased local regulation FCAS within SA.

During this planned outage power transfer will be restricted across the Victoria - South Australia interconnector (Heywood interconnector).

5 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

A credible contingency event during this planned outage could leave South Australia connected to the NEM only via the South Australian 132 kV network. To maintain system security following this contingency AEMO will need to: 07/07/2020 08:45 07/07/2020 15:30 Cherry Gardens - Tailem Bend 275 Day: 2 hrs Being SA ElectraNet • Initiate the orderly separation of SA from the rest of the NEM. To be issued Maintenance Tuesday Tuesday kV Line Night: Not applicable assessed • Source increased local regulation FCAS within SA.

During this planned outage power transfer will be restricted across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 14/07/2020 07:00 14/07/2020 17:00 Rowville - South Morang 500 kV A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Not required Maintenance Tuesday Tuesday Line • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high impact outage because the recall time is greater than 30 14/07/2020 08:00 14/07/2020 11:25 Ross No.2 288/138/19 kV minutes. Day: 1 hrs Being QLD Powerlink Not required Maintenance Tuesday Tuesday Transformer A credible contingency event during this planned outage may require Night: Not applicable assessed market intervention through issuing of directions.

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 15/07/2020 07:00 15/07/2020 17:00 Rowville - South Morang 500 kV A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Not required Maintenance Wednesday Wednesday Line • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 16/07/2020 07:00 16/07/2020 17:00 A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Keilor - South Morang 500 kV Line Not required Maintenance Thursday Thursday • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

6 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 17/07/2020 07:00 17/07/2020 17:00 A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Keilor - South Morang 500 kV Line Not required Maintenance Friday Friday • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

A credible contingency event during this planned outage could leave South Australia connected to the NEM only via the South Australian 132 kV network. To maintain system security following this contingency AEMO will need to: 17/07/2020 09:00 19/07/2020 17:30 Tailem Bend - South East No.1 275 Day: 3 hrs Being SA ElectraNet • Initiate the orderly separation of SA from the rest of the NEM. To be issued Maintenance Friday Sunday kV Line Night: 6 hrs assessed • Source increased local regulation FCAS within SA.

During this planned outage power transfer will be restricted across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high impact outage because the recall time is greater than 30 22/07/2020 08:30 22/07/2020 14:00 Ross No.3 288/138/19 kV minutes. Day: 1 hrs Being QLD Powerlink Not required Maintenance Wednesday Wednesday Transformer A credible contingency event during this planned outage may require Night: Not applicable assessed market intervention through issuing of directions.

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 23/07/2020 07:00 23/07/2020 17:00 South Morang - Sydenham No.2 A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Not required Maintenance Thursday Thursday 500 kV Line • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high impact outage only if the Forecast Operational Demand in Victoria region is greater than 7,000 MW 24/07/2020 07:00 24/07/2020 17:00 South Morang - Sydenham No.2 A credible contingency event during this planned outage could: Day: 2 hrs Being VIC AusNet Not required Maintenance Friday Friday 500 kV Line • Cause a large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

7 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason

This is a high-impact outage only if the Emergency Moorabool Transformer Trip (EMTT) scheme remains activated. 28/07/2020 07:00 28/07/2020 17:00 Moorabool–Sydenham No.1 500 A credible contingency event during this planned outage could cause: Day: 2 hrs Being VIC AusNet Not required Maintenance Tuesday Tuesday kV Line • A large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high-impact outage only if the Emergency Moorabool Transformer Trip (EMTT) scheme remains activated. 29/07/2020 07:00 29/07/2020 17:00 Moorabool–Sydenham No.2 500 A credible contingency event during this planned outage could cause: Day: 2 hrs Being VIC AusNet Not required Maintenance Wednesday Wednesday kV Line • A large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

This is a high-impact outage only if the Emergency Moorabool Transformer Trip (EMTT) scheme remains activated. 30/07/2020 07:00 30/07/2020 17:00 Moorabool–Sydenham No.2 500 A credible contingency event during this planned outage could cause: Day: 2 hrs Being VIC AusNet Not required Maintenance Thursday Thursday kV Line • A large reduction in generation in Victoria Night: Not applicable assessed • Restrict power transfer across the Victoria - South Australia interconnector (Heywood interconnector).

03/08/2020 09:00 03/08/2020 19:00 This is a high-impact outage only if the forecast temperature at Red NSW / VIC AusNet Monday Monday Cliffs is greater than 30 °C This outage offloads the Buronga to Darlington Point X5 220 kV line 04/08/2020 09:00 04/08/2020 19:00 NSW / VIC AusNet and restricts power transfer Tuesday Tuesday - Wodonga (060) 330 kV Day: No recall • Between Victoria and New South Wales. Not required Invoked Project work 05/08/2020 09:00 05/08/2020 19:00 Line Night: No recall NSW / VIC AusNet • Between South Australia and Victoria on Murraylink Wednesday Wednesday A credible contingency event during this planned outage may require: 06/08/2020 09:00 06/08/2020 19:00 NSW / VIC AusNet • Load shedding in the Victorian outer grid Thursday Thursday • Market intervention through issuing of directions.

This is a high-impact outage only if the forecast temperature at Red Cliffs is greater than 30 °C This outage offloads the Buronga to Darlington Point X5 220 kV line and restricts power transfer 06/08/2020 09:00 06/08/2020 19:00 Jindera - Wodonga (060) 330 kV Day: 10 hrs Being NSW / VIC Transgrid • Between Victoria and New South Wales. Not required Maintenance Thursday Thursday Line Night: No recall assessed • Between South Australia and Victoria on Murraylink A credible contingency event during this planned outage may require: • Load shedding in the Victorian outer grid • Market intervention through issuing of directions.

8 / 11 Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason This is a high-impact outage only if the forecast temperature at Red 07/08/2020 09:00 07/08/2020 19:00 NSW / VIC AusNet Cliffs is greater than 30 °C Friday Friday Jindera - Wodonga (060) 330 kV Day: No recall This outage offloads the Buronga to Darlington Point X5 220 kV line Not required Invoked Project work 08/08/2020 09:00 08/08/2020 19:00 Line Night: No recall NSW / VIC AusNet and restricts power transfer Saturday Saturday • Between Victoria and New South Wales.

A credible contingency event during this planned outage could leave South Australia connected to the NEM only via the South Australian 132 kV network. To maintain system security following this contingency AEMO will need to: 14/08/2020 09:00 16/08/2020 17:30 Tailem Bend - South East No.2 275 Day: 3 hrs Being SA ElectraNet • Initiate the orderly separation of SA from the rest of the NEM. To be issued Maintenance Friday Sunday kV Line Night: 6 hrs assessed • Source increased local regulation FCAS within SA.

During this planned outage power transfer will be restricted across the Victoria - South Australia interconnector (Heywood interconnector).

N/A A credible contingency event during this planned outage could cause synchronous separation of the South Australia region from the rest of the NEM. 05/10/2020 07:00 05/10/2020 17:00 Day: 4 hrs Being VIC AusNet Moorabool-HGTS 500kV no 1 LINE During this planned outage: To be issued Project work Monday Monday Night: No recall assessed • Power transfer will be restricted across the Victoria - South Australia interconnector (Heywood interconnector). • Post contingent FCAS will be sourced within SA following Separation event.

This is a high impact outage because the recall time is greater than 30 05/10/2020 07:00 16/10/2020 17:00 Bouldercombe - Nebo (821) 275 kV minutes. Day: 72 hrs Being QLD Powerlink Not required Maintenance Monday Friday Line A credible contingency event during this planned outage may require Night: 96 hrs assessed market intervention through issuing of directions. 06/10/2020 07:00 06/10/2020 17:00 VIC AusNet Tuesday Tuesday 07/10/2020 07:00 07/10/2020 17:00 VIC AusNet Wednesday Wednesday N/A 08/10/2020 07:00 08/10/2020 17:00 A credible contingency event during this planned outage could cause VIC AusNet Thursday Thursday synchronous separation of the South Australia region from the rest of the NEM. 09/10/2020 07:00 09/10/2020 17:00 Day: 4 hrs Being VIC AusNet Moorabool-HGTS 500kV no 1 LINE During this planned outage: To be issued Project work Friday Friday Night: No recall assessed • Power transfer will be restricted across the Victoria - South Australia 10/10/2020 07:00 10/10/2020 17:00 VIC AusNet interconnector (Heywood interconnector). Saturday Saturday • Post contingent FCAS will be sourced within SA following Separation event.

9 / 11 N/A A credible contingency event during this planned outage could cause synchronous separation of the South Australia region from the rest of the NEM. Day: 4 hrs Being Moorabool-HGTS 500kV no 1 LINE During this planned outage: To be issued Project work Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Night: No recall Newly addedassessed outage • Power transfer will be restricted across the Victoria - South Australia Update(s) since the last notification interconnector (Heywood interconnector). Region NSP Start Finish Network asset • Post contingent FCAS will be sourcedImpact within SA following Separation Recall time Market notice Constraint Outage reason 11/10/2020 07:00 11/10/2020 17:00 event. VIC AusNet Sunday Sunday 12/10/2020 07:00 12/10/2020 17:00 VIC AusNet Monday Monday 19/10/2020 07:00 19/10/2020 17:00 VIC AusNet Monday Monday 20/10/2020 07:00 20/10/2020 17:00 VIC AusNet Tuesday Tuesday 21/10/2020 07:00 21/10/2020 17:00 VIC AusNet A credible contingency event during this planned outage could cause Wednesday Wednesday synchronous separation of the South Australia region from the rest of 22/10/2020 07:00 22/10/2020 17:00 the NEM. VIC AusNet Thursday Thursday During this planned outage: Day: 2 hrs Being Moorabool - Mortlake 500 kV Line To be issued Project work 23/10/2020 07:00 23/10/2020 17:00 • Power transfer will be restricted across the Victoria - South Australia Night: No recall assessed VIC AusNet Friday Friday interconnector (Heywood interconnector). 24/10/2020 07:00 24/10/2020 17:00 • Post contingent FCAS will be sourced within SA following Separation VIC AusNet Saturday Saturday event. 25/10/2020 07:00 25/10/2020 17:00 VIC AusNet Sunday Sunday 26/10/2020 07:00 26/10/2020 17:00 VIC AusNet Monday Monday 12/04/2021 07:00 12/04/2021 17:00 VIC AusNet Monday Monday 13/04/2021 07:00 13/04/2021 17:00 VIC AusNet Tuesday Tuesday 14/04/2021 07:00 14/04/2021 17:00 VIC AusNet Wednesday Wednesday This is a high-impact outage only if the forecast temperature at Red Cliffs is greater than 30 °C 15/04/2021 07:00 15/04/2021 17:00 Day: 2 hrs Being VIC AusNet Red Cliffs-Wemen 220kV LINE A credible contingency event during this planned outage may require: Not required Maintenance Thursday Thursday Night: Not applicable assessed • Load shedding in the Victorian outer grid 16/04/2021 07:00 16/04/2021 17:00 VIC AusNet • Market intervention through issuing of directions. Friday Friday 17/04/2021 07:00 17/04/2021 17:00 VIC AusNet Saturday Saturday 18/04/2021 07:00 18/04/2021 17:00 VIC AusNet Sunday Sunday 24/05/2021 07:00 24/05/2021 17:00 VIC AusNet Monday Monday 25/05/2021 07:00 25/05/2021 17:00 VIC AusNet Tuesday Tuesday 26/05/2021 07:00 26/05/2021 17:00 VIC AusNet Wednesday Wednesday This is a high-impact outage only if the forecast temperature at Red Cliffs is greater than 30 °C Day: 2 hrs Being -Wemen 220kV LINE A credible contingency event during this planned outage may require: Not required Maintenance Night: Not applicable assessed • Load shedding in the Victorian outer grid • Market intervention10 / 11 through issuing of directions. Upcoming high-impact outages in the NEM (information as of 25/05/2020 0957 hrs): Newly added outage Update(s) since the last notification This is a high-impact outage only if the forecast temperature at Red Region NSP Start Finish Network asset Impact Recall time Market notice Constraint Outage reason Cliffs is greater than 30 °C 27/05/2021 07:00 27/05/2021 17:00 Day: 2 hrs Being VIC AusNet Kerang-Wemen 220kV LINE A credible contingency event during this planned outage may require: Not required Maintenance Thursday Thursday Night: Not applicable assessed • Load shedding in the Victorian outer grid 28/05/2021 07:00 28/05/2021 17:00 VIC AusNet • Market intervention through issuing of directions. Friday Friday 29/05/2021 07:00 29/05/2021 17:00 VIC AusNet Saturday Saturday 30/05/2021 07:00 30/05/2021 17:00 VIC AusNet Sunday Sunday

This is a high impact outage because the recall time is greater than 30 minutes. A credible contingency event during this planned outage may result in 01/07/2021 07:00 18/08/2021 17:00 Stanwell – Broadsound 856 or shedding Far North QLD load and Lilyvale local load. Day: 8 hrs Being QLD Powerlink Not required Maintenance Thursday Wednesday 8831 Night: 12 hrs assessed Following a credible contingency market intervention through issuing of directions may be required. If market intervention is unsuccessful all of North QLD load would be in a credible risk

Disclaimer This document or the information in it may be subsequently updated or amended. This document does not constitute legal or business advice, and should not be relied on as a substitute for obtaining detailed advice about the National Electricity Law, the National Electricity Rules, or any other applicable laws, procedures or policies. AEMO has made every effort to ensure the quality of the information in this document but cannot guarantee its accuracy or completeness. Accordingly, to the maximum extent permitted by law, AEMO and its officers, employees and consultants involved in the preparation of this document: - make no representation or warranty, express or implied, as to the currency, accuracy, reliability or completeness of the information in this document; and - are not liable (whether by reason of negligence or otherwise) for any statements or representations in this document, or any omissions from it, or for any use or reliance on the information in it.

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