Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2020-01-11

The table below contains the significant transmission outages submitted as tentative to the AESO.
These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes.
An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria:
  1. it affects a transmission facility operating at two hundred and forty (240) kV or greater;
  2. it affects an intertie;
  3. it affects an element connecting facilities owned by two (2) or more different legal owners of transmission facilities;
  4. it affects an element that connects a generating unit or an aggregated generating facility to the interconnected electric system;
  5. it requires the ISO to issue a dispatch or directive for generation in order to facilitate the planned outage;
  6. it affects a cutplane limit;
  7. it limits or reduces the operability of a synchronous condenser, static VAr compensator, static compensator or other similar dynamic device; or
  8. it affects high voltage direct current facilities.
Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service.

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Owner From To Duration Element Scheduled Activity Affected Intertie
Syncrude 04-Oct-18 09:00 20-Mar-20 20:00 533.46 Days
Continuous		 Mildred T3 (Syncrude Mildred Lake) damaged transformer repairs (P2039)  
EPCOR 06-Jan-20 07:00 05-Feb-20 17:00 30.42 Days
Continuous		 Isolation of 1139L from E816S Petrolia S/S and 376S Harry Smith S/S Cut in of 1139L and 1164L into Riverview S/S as part of Riverview energization.  
ALTALINK, EPCOR 06-Jan-20 08:00 05-Feb-20 18:00 30.42 Days
Continuous		 1139L (367s Harry Smith - 816s Petrolia) cutting in EPCOR new sub (Riverview) to Altalink 1139L  
ATCO 06-Jan-20 08:00 29-Feb-20 17:00 54.38 Days
Continuous		 7L64 Contractor replacing structures and crossarms  
ATCO 06-Jan-20 09:00 13-Jan-20 17:00 7.33 Days
Continuous		 7L63 (788s Hotchkiss - 783s Cadotte River) 7L63 crossarm replacements  
ALTALINK 10-Jan-20 07:00 11-Jan-20 18:00 1.46 Days
Continuous		 789L (818s Winefred - 1034s Margie) urgent fire mitigation change insulators on Str 185, 188, 194, 230 and 237 scheduled  
ENMAX 12-Jan-20 08:00 12-Jan-20 18:00 10 Hours
Continuous		 50L Move marshalling rack to accommodate new PDC being install  
ENMAX 13-Jan-20 08:00 14-Jan-20 16:00 1.33 Days
Continuous		 833L. 12PT138-Z31. 12.2TR HV SW maint SW81, SW82, SW83, MD-12.2TR  
ALTALINK 13-Jan-20 08:30 16-Jan-20 17:30 3.38 Days
Continuous		 511s SVC+ GOI Install snubber for SVC+ expansion tank sensors, yearly maintenance  
ALTALINK 13-Jan-20 10:00 14-Jan-20 17:00 31 Hours
Continuous		 71s1552 - GOI Settings Changes of Sync Check and Functional Testing on 71s1552 CUH90 relay.Single breaker outage in breaker-and-a-half scheme.  
BCH 14-Jan-20 07:00 24-Feb-20 15:00 41.33 Days
Continuous		 1L274 (48s Pocaterra - Britt Creek) Refurbishment project  
ALTALINK 14-Jan-20 08:45 24-Jan-20 17:15 10.35 Days
Continuous		 48s 887L/1L274 Open Breaker ADVICE for B Refurbishment project - replace structures and related components. (Placeholder) AB-BC
ALTALINK 15-Jan-20 07:00 15-Jan-20 11:45 4.75 Hours
Daily		 ALC 01L (409s - ALC 01s) GOI Work on dead end insulators and corona rings  
ALTALINK 15-Jan-20 07:30 15-Jan-20 17:30 10 Hours
Daily		 310p152 (affects 974L) GOI Replace 1 CT. Will need a 15 minute outage to 974L for energization of the CT due to safe switching requirements  
ENMAX 15-Jan-20 08:00 16-Jan-20 16:00 1.33 Days
Continuous		 832L. 12PT138-Z31. 12.2TR HV SW maint SW84, SW85, SW86, MD-12.1TR  
ALTALINK 15-Jan-20 10:00 16-Jan-20 17:00 31 Hours
Continuous		 71s1452 - GOI Settings Changes of Sync Check and Functional Testing on 71s1452 CUH90 relay.Single breaker outage in breaker-and-a-half scheme.  
ALTALINK 15-Jan-20 12:15 15-Jan-20 17:15 5 Hours
Daily		 ALC 02L (409s - 879s) GOI Work on dead end insulators and corona rings  
EPCOR 20-Jan-20 07:00 24-Jan-20 17:00 4.42 Days
Continuous		 Tx1 outage @ Cloverbar S/S Cutover of new BF protection and relay maintenance op-checks  
ATCO 20-Jan-20 08:00 03-Feb-20 16:00 14.33 Days
Continuous		 740S 701 Replace BKR 701, replace 701PT
Milner Power Generation out of service for duration		  
ATCO 20-Jan-20 09:00 27-Jan-20 17:00 7.33 Days
Continuous		 7L63 7L63 crossarm replacements  
ALTALINK 22-Jan-20 07:15 28-Jan-20 16:45 6.4 Days
Continuous		 918L (281s -162s) GOI Performing component replacement and installing interphase spacers on 918L circuit between structures 791-828. Portion of circuit parallels 771L on same towers and requires a reclosure block when work is taking place.  
ALTALINK 22-Jan-20 10:00 23-Jan-20 17:00 31 Hours
Continuous		 575s719N (719L) GOI Settings Changes of Sync Check and Functional Testing on CUH90 relay for 575s719N.  
EPCOR 27-Jan-20 07:00 28-Jan-20 17:00 1.42 Days
Continuous		 Dome S/S Outage to Tx1 Outage to TX1 required for relay maintenance op-checks  
ATCO 27-Jan-20 08:00 31-Jan-20 16:00 4.33 Days
Continuous		 7L84 Crossarm Changes  
ALTALINK 27-Jan-20 09:00 30-Jan-20 18:00 3.38 Days
Continuous		 892L (244s - 895s) - GOI Components/Structure Replacements (Structures #40 - 248); DG @ 895s will be coming offline  
ALTALINK 27-Jan-20 10:00 28-Jan-20 17:00 31 Hours
Continuous		 13s1452 - GOI Settings Changes of Sync Check and Functional Testing on 13s1452 CUH90 relay.Single breaker outage in breaker-and-a-half scheme.  
BCH 28-Jan-20 07:00 28-Jan-20 16:00 9 Hours
Continuous		 1L274 (EFT 1D22 - 1D3L274) Replace structure  
ALTALINK 28-Jan-20 07:15 29-Jan-20 17:45 1.44 Days
Continuous		 788L (788L107A-A898s-602L1) - GOI 788L Components Str's Range 151-282  
ALTALINK 28-Jan-20 09:00 28-Jan-20 17:00 8 Hours
Daily		 33s1 (Unit 1) GOI 138kV breaker maintenance  
ALTALINK 29-Jan-20 10:00 30-Jan-20 17:00 31 Hours
Continuous		 13s1652 - GOI Settings Changes of Sync Check and Functional Testing on 13s1652 CUH90 relay.Single breaker outage in breaker-and-a-half scheme.  
ALTALINK 30-Jan-20 06:00 30-Jan-20 18:00 12 Hours
Daily		 859L(20s - 793s) GOI Replace transmission line span between Substation deadend and 1st T-line structure.  
EPCOR 30-Jan-20 07:00 31-Jan-20 17:00 1.42 Days
Continuous		 Dome S/S TX2 Outage Outage to TX2 required for relay maintenance op-checks  
ATCO 31-Jan-20 09:00 13-Mar-20 16:00 42.25 Days
Continuous		 807s 902T (807s Sheerness), 9L100, 807S 902 807S BKR 902 maintenance & 9L100 protection upgrade
Work has been coordinated with ATCO Power and it was stated that 807S unit #2 Shutdown will occur from Jan 31 to March 13, 2020, outages are dependant on 807S unit 2 shutdown
Outage zone needs to expand from 9100D1 to 910B & 911B to include 910 & 911 for testing ( 2 days required)		  
EPCOR 03-Feb-20 07:00 07-Feb-20 17:00 4.42 Days
Continuous		 Bellamy S/S TX2 Outage Outage to TX2 required for relay maintenance op-checks  
EPCOR 03-Feb-20 07:00 07-Feb-20 17:00 4.42 Days
Continuous		 Poundmaker S/S 930L Outage Outage to 930L required for relay maintenance and op-checks  
BCH 03-Feb-20 07:00 13-Feb-20 16:00 10.38 Days
Continuous		 1L274 (48s Pocaterra - Britt Creek) Refurbishment project  
ATCO 03-Feb-20 08:00 16-Feb-20 16:00 13.33 Days
Continuous		 740S 704, 7L20 replace breaker and re conductor switches  
ENMAX 03-Feb-20 08:00 01-Mar-20 16:00 27.33 Days
Continuous		 162.81L Line Protection Upgrade  
ATCO 03-Feb-20 09:00 10-Feb-20 17:00 7.33 Days
Continuous		 7L63 7L63 crossarm replacements  
ALTALINK 03-Feb-20 12:15 06-Feb-20 17:45 3.23 Days
Continuous		 794L (157s-A819s) - GOI 794L Components Str's Range 9-258  
ENMAX 04-Feb-20 08:00 04-Feb-20 16:00 8 Hours
Continuous		 162.81L HV SW maint SW82, SW83, MD-162.1TR  
ENMAX 05-Feb-20 08:00 06-Feb-20 16:00 1.33 Days
Continuous		 918L HV SW maint SW134, SW135, MD-918  
EPCOR 10-Feb-20 07:00 14-Feb-20 17:00 4.42 Days
Continuous		 Pounmaker/Jasper S/S 1098L outage Outage to 1098L required for relay maintenance and op-checks  
ENMAX 10-Feb-20 08:00 10-Feb-20 16:00 8 Hours
Continuous		 932L HV SW maint SW144, SW145  
EPCOR 10-Feb-20 09:30 10-Feb-20 17:00 7.5 Hours
Continuous		 909l - (Dome - Ellerslie) Installation of new 240 Kv breaker  
ALTALINK 10-Feb-20 12:15 13-Feb-20 17:45 3.23 Days
Daily		 794L (157s-A819s) - GOI Component Replacements STR 9-258  
ALTALINK 12-Feb-20 09:00 12-Feb-20 16:00 7 Hours
Daily		 1116L (170s-167s)- GOI Marker Ball Installation Str's 69-70  
EPCOR 17-Feb-20 07:00 21-Feb-20 17:00 4.42 Days
Continuous		 Poundmaker S/S Tx2 outage Outage to Tx2 required for relay maintenance and op-checks  
ATCO 17-Feb-20 08:00 21-Feb-20 16:00 4.33 Days
Continuous		 951S SVC To correct deficiencies that were identified during the initial energization period of Thickwood SVC,  
ATCO 17-Feb-20 08:00 29-Feb-20 16:00 12.33 Days
Continuous		 740S 705, 7L80 replace 705 PT and 705 CT
7L80 required open ended for the duration		  
ATCO 18-Feb-20 09:00 24-Feb-20 17:00 6.33 Days
Continuous		 7L63 7L63 crossarm replacements  
ALTALINK 18-Feb-20 12:15 20-Feb-20 17:45 2.23 Days
Continuous		 794L (157s-A819s) - GOI Component Replacements STR 9-258  
ALTALINK 21-Feb-20 07:15 27-Feb-20 16:45 6.4 Days
Continuous		 443L (55s - 214s) GOI complete structure changes at STR’s 6,11,40,42,55,57 and 92 on 443L  
EPCOR 24-Feb-20 07:00 28-Feb-20 17:00 4.42 Days
Continuous		 Poundmaker S/S Tx3 outage Outage to Tx3 required for relay maintenance and op-checks  
ATCO 24-Feb-20 09:00 28-Feb-20 15:00 4.25 Days
Continuous		 7L32 Line Mitigation  
ALTALINK 25-Feb-20 08:00 27-Feb-20 17:45 2.41 Days
Continuous		 794L (157s-A819s) - GOI 794L Components Replacements Str's 9-258  
ATCO 02-Mar-20 08:00 24-Apr-20 17:00 53.33 Days
Continuous		 7L59 Contractor replacing structures and crossarms.
This is a contingency outage only should 7L64 be unable to be taken out of service 7L59 will be moved up in it's place Jan-Feb		  
ATCO 02-Mar-20 09:00 05-Mar-20 16:00 3.29 Days
Continuous		 7L50 crew do some conductor sampling on 7L50 , which means that I have to splice out some fairly large pieces of conductor.  
ALTALINK 02-Mar-20 12:15 05-Mar-20 17:45 3.23 Days
Continuous		 794L (157s-A819s) - GOI 794L Components Replacements Str's 9-258  
ATCO 06-Mar-20 07:00 13-Mar-20 17:00 7.38 Days
Continuous		 9L101 Line move for mine expansion.
Attach new line to existing 9L101		  
Syncrude 21-Mar-20 09:00 01-Apr-20 20:00 11.46 Days
Continuous		 De-energize temporary transformer (G15) to install new transformer T3 (72kV / 13.8kV) at Plant 31 Substation. CB # 3235, 335 and MOB # 334 will be operated for this scope of work. De-energize temporary transformer (G15) to install new transformer T3 (72kV / 13.8kV) at Plant 31 Substation. CB # 3235, 335 and MOB # 334 will be operated for this scope of work.  
ENMAX 06-Apr-20 08:00 17-Apr-20 18:00 11.42 Days
Continuous		 36.81L. Haskayne line raise project. Raising the line and replacing 4 structures to accommodate a new road construction.  
ALTALINK 20-Apr-20 07:00 27-Apr-20 17:00 7.42 Days
Continuous		 268s T1 & VR1 - GOI 138 kV and 69 kV bushings placement on transformer T1, 69 kV bushings placement on transformer VR1  
ATCO 11-May-20 08:00 22-May-20 16:00 11.33 Days
Continuous		 7L91 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 12-May-20 08:00 19-May-20 16:00 7.33 Days
Continuous		 743S 502VR, 743S 702T Adding Razor Energy DG at Sarah Lake  
ATCO 25-May-20 08:00 05-Jun-20 16:00 11.33 Days
Continuous		 7L89 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
EPCOR 08-Jun-20 07:00 12-Jun-20 17:00 4.42 Days
Continuous		 TX1 @ Castledowns MV protection cutover  
ATCO 08-Jun-20 08:00 19-Jun-20 16:00 11.33 Days
Continuous		 7L587 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 22-Jun-20 08:00 10-Aug-20 16:00 49.33 Days
Continuous		 826S 901T 240/144kV Breaker Fail Protection
(901T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
EPCOR 06-Jul-20 07:00 17-Jul-20 17:00 11.42 Days
Continuous		 TX3 @ Jasper DGA monitor  
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous		 972S 905B Halkirk 2 Windfarm Project  
ATCO 03-Aug-20 08:00 05-Aug-20 16:00 2.33 Days
Continuous		 RL1, 848S 902T, 848S 900BS2 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

AUG 3, 2020 - AUG 5, 2020
GOI points:912B,RL-1D1,901A,905A,902TD
Impact: 900BS2 & 902T OOS, RL1 open ended
Scope: remove low pipe bus		  
ATCO 05-Aug-20 08:00 04-Sep-20 16:00 30.33 Days
Continuous		 848S 911, 848S 240kV BUS 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

AUG 5 2020 - SEPT 4 2020
SHRINK GOI to: 911B,912B
Impact: 911 OOS
Scope: install breaker 912, switches & PT's		  
ATCO 17-Aug-20 08:00 05-Oct-20 16:00 49.33 Days
Continuous		 826S 902T 240/144kV Breaker Fail Protection
(902T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ALTALINK 24-Aug-20 08:00 03-Sep-20 18:00 10.42 Days
Continuous		 1325L (510s - 511s) - GOI Annual inspection & maintenance  
EPCOR 31-Aug-20 07:00 25-Sep-20 17:00 25.42 Days
Continuous		 TX4 @ Jasper Bushing Replacement & Oil Work  
ATCO 04-Sep-20 08:00 06-Sep-20 16:00 2.33 Days
Continuous		 848S 901T, 9L01, 848S 900BS1 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

SEPT 4 2020 - SEPT 6 2020
EXPAND GOI to: 911B,9L01D1,908A,903A,901TD
Impact: 900BS1 & 901T OOS, 9L01 open ended
Scope: remove low pipe bus		  
ATCO 06-Sep-20 08:00 10-Nov-20 16:00 65.38 Days
Continuous		 848S 911, 848S 240kV BUS 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

SEPT 6 2020 - NOV 10 2020
SHRINK GOI to: 911B,912B
Impact: 911 OOS
Scope: continue to install breaker 912, switches & PT's		  
ATCO 14-Sep-20 07:00 23-Sep-20 17:00 9.42 Days
Continuous		 972S 900BS1 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous		 29EDD-1 5yr and 10 yr maintenance on 29CTT-1 in 29EDD-1

Elements not available:
29CVT-1, 29PL9-2		  
EPCOR 21-Sep-20 07:00 25-Sep-20 17:00 4.42 Days
Continuous		 1044L east @ Jasper - Petrolia Vt Replacement  
ATCO 23-Sep-20 07:00 25-Sep-20 17:00 2.42 Days
Continuous		 972S 900BS2, 9L16 Installing new 240Kv Bay (connect 909A to BUS 2) for 620S Goldeye substation connection
Cutover 9L16 to New Bay		  
ATCO 25-Sep-20 07:00 28-Sep-20 17:00 3.42 Days
Continuous		 9L177 Installing new 240Kv Bay for 620S Goldeye substation connection
Cutover 9L177 to New Bay		  
ATCO 28-Sep-20 07:00 29-Sep-20 17:00 1.42 Days
Continuous		 9L62 Installing new 240Kv Bay for 620S Goldeye substation connection
String 9L62 into 972S Tinchebray		  
ENMAX 09-Oct-20 08:00 12-Oct-20 16:00 3.33 Days
Continuous		 162s PT-Z41. 1-GSU-XF-0001 Replace 87-XF1 B differential protection. Commission checks and trip testing  
ATCO 12-Oct-20 08:00 23-Oct-20 16:00 11.33 Days
Continuous		 9L36 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
EPCOR 13-Oct-20 07:00 23-Oct-20 17:00 10.42 Days
Continuous		 TX1 @ Petrolia DGA Install  
ATCO 22-Oct-20 07:00 27-Oct-20 17:00 5.42 Days
Continuous		 7L65, 7L77 7L65 Rebuild Project  
ATCO 26-Oct-20 08:00 07-Nov-20 16:00 12.38 Days
Continuous		 9L37 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 10-Nov-20 08:00 12-Nov-20 16:00 2.33 Days
Continuous		 RL1, 848S 902T, 848S 900BS2 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

NOV 10, 2020 - NOV 12, 2020
EXPAND GOI to: 912B,RL-1D1,901A,905A,902TD
Impact: 900BS2 & 902T OOS, RL1 open ended
Scope: install low pipe bus		  
ATCO 12-Nov-20 08:00 13-Nov-20 16:00 1.33 Days
Continuous		 848S 911, 848S 240kV BUS 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

NOV 12 2020 - NOV 13 2020
SHRINK GOI to: 911B,912B
Impact: 911 OOS
Scope: continue to install breaker 912, switches & PT's		  
ATCO 13-Nov-20 08:00 15-Nov-20 16:00 2.33 Days
Continuous		 848S 901T, 9L01, 848S 900BS1 848S Ruth Lake 240kv expansion for 29PL9-26 tie in

NOV 13 2020 - NOV 15 2020
EXPAND GOI to: 911B,9L01D1,903A,908A,901TD
Impact: 900BS1 & 901T OOS, 9L01 open ended
Scope: install low pipe bus		  
EPCOR 16-Nov-20 07:00 27-Nov-20 17:00 11.42 Days
Continuous		 CV5 @ Castledowns & Victoria maint and splice repair  
EPCOR 23-Nov-20 07:00 27-Nov-20 17:00 4.42 Days
Continuous		 TX2 @ Castledowns TX protection cutover  
ATCO 05-Dec-20 07:00 11-Dec-20 16:00 6.38 Days
Continuous		 9L59 Outage for Garden Plain Wind Project  
ALTALINK 19-Dec-20 08:00 20-Dec-20 16:00 1.33 Days
Continuous		 103s 138kV Bus 1 GOI Replace A phase PT of VT7/SS2  
ATCO 05-Jan-21 08:00 08-Jan-21 16:00 3.33 Days
Continuous		 9L20 56772 Nevis Transformer Addition
9L20 Open -ended		  
ATCO 09-Jan-21 08:00 12-Jan-21 16:00 3.33 Days
Continuous		 9L912 56772 Nevis Transformer Addition
9L912 Open -ended		  
ATCO 20-Jan-21 08:00 23-Feb-21 16:00 34.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 906, 951S 903 951S construction for 9L162 & 9L193 addition
AESO should be notified of any changes to below workplan:

Jan 20, 2021 – Feb 20, 2021
Isolation pts: 908B,909A
Impact: BKR 908 OOS
Scope of work: Demo bus & install 909A & 909B
Feb 21, 2021 – Feb 23, 2021
Expand to isolation pts:903B, 906B,908B
Impact: BKR 903,BKR 906, 900BS2 OOS
Scope of work: Make connections to 909A & 912A		  
ATCO 25-Jan-21 08:00 26-Jan-21 16:00 1.33 Days
Continuous		 766S 901T, 9L20, 9L912 56772 Nevis Transformer Addition
Tie-in to the new bus for 902T
901T OOS
9L20 OPEN-ENDED
9L912 OPEN-ENDED		  
ATCO 15-Feb-21 07:00 02-Mar-21 17:00 15.42 Days
Continuous		 972S 900BS2, 9L16 (1) Outage on 907B and 908A for the installation and commissioning of 907 and 907CT  
ATCO 24-Feb-21 08:00 26-Feb-21 16:00 2.33 Days
Continuous		 951S 900BS1 951S construction for 240kv expansion - 9L162 & 9L193 addition
Connect 910A to 900BS1
Impact: 900BS1 OOS, BKR 901 OOS, BKR 904 OOS, BKR 907 OOS, 920C OOS		  
ATCO 01-Mar-21 07:00 02-Mar-21 17:00 1.42 Days
Continuous		 972S 900BS2, 9L16 (2) Outage on 9L16 to cut the line over to the new bay  
ATCO 08-Mar-21 07:00 12-Mar-21 17:00 4.42 Days
Continuous		 9L177 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
ATCO 04-May-21 08:00 17-May-21 17:00 13.38 Days
Continuous		 9L02 Louise Creek Rebuild project
Wiring for 903/910BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ATCO 24-May-21 08:00 06-Jun-21 17:00 13.38 Days
Continuous		 9L40 Louise Creek Rebuild project
Wiring for 903/904BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ATCO 14-Jun-21 08:00 27-Jun-21 17:00 13.38 Days
Continuous		 9L05 Louise Creek Rebuild project
Wiring for 904/905BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 05-Jul-21 08:00 18-Jul-21 17:00 13.38 Days
Continuous		 9L939 Louise Creek Rebuild project
Wiring for 905/906BF relays.
CT ratio changes.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 26-Jul-21 08:00 28-Sep-21 17:00 64.38 Days
Continuous		 809S 902T, 9L938 Louise Creek Rebuild project
Replace breakers' 911, 912, and 707.
Add new bus PT 700PT2.
Complete wiring for BF, 21A, 21B, and 701C relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 29-Jul-21 08:00 05-Aug-21 17:00 7.38 Days
Continuous		 7L91 P&C wiring and commissioning associated to 7L208 work  
ATCO 04-Oct-21 08:00 17-Oct-21 17:00 13.38 Days
Continuous		 809S 901T Louise Creek Rebuild project
Switch station service to alternate.
Replace bus PT 900PT1.
Complete wiring for BF, 87TA, 87TB, and 51NGR relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  

AB-BC, AB-SK & AB-MATL: refer to AESO web posting: http://itc.aeso.ca/itc/public/reportIndex.do
Also,
AB-BC, AB-SK & AB-MATL: refer to ISO Rule 203.6: http://www.aeso.ca/rulesprocedures/18592.html

Prepared On: 2019-12-11   4:02:40 PM


This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein.

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