Excursion Notices

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Excursion notices are emailed to registered electricity market participants when a frequency excursion or voltage excursion occurs on the power system

Subscribe to this page to receive an email notification when a new Excursion Notice is published.  If you wish to receive notification when a CAN or GEN is issued you need to subscribe to these pages separately.

May
Notice Date
Notice EXN Voltage North Island Bunnythorpe Mataroa Auto-reclosed 800000131 (PDF 89.58 KB) Date
Notice EXN - Voltage - 800000129 (PDF 89.11 KB) Date
Notice EXN - Voltage - 800000128 (PDF 88.55 KB) Date
Notice EXN - Voltage - 800000123 (PDF 91.02 KB) Date
Notice EXN - Voltage - 800000117 (PDF 90.42 KB) Date
Notice EXN Voltage North Island Haywards Synchronous Condensor 1 Tripped (PDF 30.18 KB) Date
Notice EXN - Voltage - 800000112 (PDF 88.97 KB) Date
Notice EXN - Frequency - 800000110 (PDF 90.95 KB) Date
Notice EXN Voltage North Island Te Mihi Generation Tripped (PDF 30.16 KB) Date
Notice EXN - Voltage - 800000104 (PDF 90.39 KB) Date
Notice EXN - Voltage - 800000102 (PDF 89.37 KB) Date
April
Notice Date
Notice EXN Voltage North Island Nga Tamariki Generation Tripped (PDF 30.17 KB) Date
Notice EXN - Voltage - 800000099 (PDF 90.17 KB) Date
Notice EXN - Voltage - 800000098 (PDF 90.23 KB) Date
Notice EXN - Voltage - 800000097 (PDF 90.6 KB) Date
Notice EXN - Voltage - 800000096 (PDF 89.76 KB) Date
Notice EXN Voltage North Island Central Park T5 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Cobb Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Kinleith Generation Tripped (PDF 30.18 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.24 KB) Date
Notice EXN Voltage North Island Kapuni Generation Tripped (PDF 30.16 KB) Date
Notice EXN Voltage North Island Bunnythorpe Paraparaumu Haywards 1Auto-reclosed, Paraparaumu T1 Auto-reclosed (PDF 30.32 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.24 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.24 KB) Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.19 KB) Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.2 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.25 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.25 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.25 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.24 KB) Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.25 KB) Date
Notice EXN - Voltage - 800000092 (PDF 90.59 KB) Date
Notice EXN Voltage North Island Te Ahi O Maui Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Coleridge Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Edgecumbe Tarukenga 1 Auto-reclosed,Edgecumbe Tarukenga 2 Auto-reclosed (PDF 30.3 KB) Date
Notice EXN Voltage North Island Edgecumbe Tarukenga 1 Auto-reclosed,Edgecumbe Tarukenga 2 Auto-reclosed, Edgecumbe Kawerau 3 Tripped (PDF 30.39 KB) Date
Notice EXN Voltage North Island Taumarunui Te Kowhai 1 Auto-reclosed,Taumarunui T8 Tripped (PDF 30.21 KB) Date
Notice EXN Voltage North Island Brunswick Stratford 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Henderson Maungatapere 1 Auto-reclosed,Maungaturoto T1 Tripped, Wellsford T2 Auto-reclosed (PDF 30.26 KB) Date
Notice EXN Voltage North Island Carrington St Stratford 3 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Kawerau Te Ahi O Maui 1 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Tuai Feeders 712 and 112 Auto-reclosed (PDF 30.34 KB) Date
Notice EXN Voltage North Island Pauatahanui T1 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Coleridge Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Melling T2 Tripped (PDF 30.13 KB) Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line (PDF 30.8 KB) Date
Notice EXN Voltage South Island Halfway Bush Roxburgh 2 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Edgecumbe Waiotahi 2 Tripped (PDF 30.19 KB) Date
Notice EXN Voltage North Island Edgecumbe Waiotahi 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Invercargill Roxburgh 2 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Bunnythorpe Mangahao 1 Tripped, Mangahao T3Tripped (PDF 30.17 KB) Date
Notice EXN Frequency/Voltage National Tiwai Reduction Line (PDF 30.83 KB) Date
Notice EXN Voltage South Island Edendale Invercargill 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line (PDF 30.8 KB) Date
March
Notice Date
Notice EXN Frequency National Tiwai Reduction Line (PDF 30.82 KB) Date
Notice EXN Voltage South Island Manapouri Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Bunnythorpe Brunswick 1 Auto-reclosed,Bunnythorpe Brunswick 2 Auto-reclosed (PDF 30.28 KB) Date
Notice EXN Voltage North Island Te Uku Generation fast ramp off (PDF 30.14 KB) Date
Notice EXN Voltage North Island Penrose C1 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage South Island Manapouri T6 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Turitea Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Tiwai Filter bank tripped. (PDF 30.14 KB) Date
Notice EXN Voltage North Island Kinleith Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Huntly Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage National Kinleith Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Tangiwai 55kV feeder tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage North Island Otahuhu Mt Roskill 2 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Te Huka Generation Tripped (PDF 30.14 KB) Date
Notice EXN Frequency/Voltage South Island Manapouri Generation Tripped (PDF 30.8 KB) Date
Notice EXN Voltage South Island Albury Timaru 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Poihipi Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Bromley T7 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage South Island Gore Feeder Tripped (PDF 30.11 KB) Date
Notice EXN Voltage South Island Culverden Feeder Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage North Island Rotorua Feeder Tripped (PDF 30.18 KB) Date
Notice EXN Voltage North Island Waipapa Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Tokaanu Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Hamilton STC 3 Tripped (PDF 30.13 KB) Date
February
Notice Date
Notice EXN Voltage South Island Halfway Bush Roxburgh 2 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Otahuhu Hautapu Whakamaru 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Frequency South Island Pole 3 South Blocking. (PDF 30.77 KB) Date
Notice EXN Voltage North Island Nga Tamariki Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Kawerau TOPP2 Generation Tripped (PDF 30.15 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Tripped (PDF 30.21 KB) Date
Notice EXN Voltage North Island Te Kaha Waiotahi Auto Reclosed (PDF 30.15 KB) Date
Notice EXN Voltage South Island Roxburgh 110KV Bus Fault (PDF 30.13 KB) Date
Notice EXN Voltage South Island Dobson Reefton Inangahua 2 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed (PDF 30.2 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed (PDF 30.21 KB) Date
Notice EXN Voltage North Island Central Park Westwind Wilton 3 Auto-reclosed (PDF 30.23 KB) Date
Notice EXN Voltage North Island Bunnythorpe Mataroa Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed (PDF 30.21 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed (PDF 30.2 KB) Date
Notice EXN Voltage National Benmore Haywards 1 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Carrington St Stratford 2 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Ongarue 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Bunnythorpe Tokaanu 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Ongarue 1 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Auto-reclosed, ArapuniHangatiki Ongarue 1 Auto-reclosed (PDF 30.19 KB) Date
Notice EXN Frequency North Island Maraetai Whakamaru 1 Tripped (PDF 30.8 KB) Date
Notice EXN Voltage North Island Arapuni Kinleith 2 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Ongarue 1 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Kaikohe Maungatapere 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Ngawha Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Nga Tamariki Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Ohau A Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Albany SVC 7 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Te Awamutu Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Arapuni Hamilton 2 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Frequency National Benmore Haywards 1 Tripped (PDF 30.79 KB) Date
Notice EXN Voltage North Island Nga Tamariki Generation Tripped (PDF 30.13 KB) Date
January
Notice Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Frequency South Island Manapouri Generation Tripped (PDF 30.78 KB) Date
Notice EXN Voltage North Island Ngatamariki generation tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Blenheim Stoke 1 Auto-reclosed, BlenheimStoke 2 Auto-reclosed (PDF 30.2 KB) Date
Notice EXN Voltage North Island Opunake Kapuni Stratford 2 Tripped, OpunakeT4 Tripped (PDF 30.24 KB) Date
Notice EXN Voltage North Island Otahuhu Hautapu Whakamaru 1 Auto-reclosed,Hautapu T1 Tripped (PDF 30.21 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage North Island Otahuhu C29 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Stratford 612 Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Kawerau TOPP2 Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Owhata Te Matai Tarukenga 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Kaitimako Tarukenga 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Hamilton Piako Waihou 1 Auto-reclosed,Hamilton Piako Waihou 2 Auto-reclosed (PDF 30.26 KB) Date
Notice EXN Voltage North Island Bunnythorpe Tangiwai Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Bunnythorpe Tangiwai Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Bunnythorpe Brunswick 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Brunswick Stratford 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Stratford Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Huntly Stratford Auto-reclosed, StratfordTaumarunui Auto-reclosed, Taumarunui T5 Tripped (PDF 30.25 KB) Date
Notice EXN Voltage North Island Bunnythorpe Tangiwai Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Taumarunui Te Kowhai 1 Auto-reclosed,Taumarunui T8 Tripped (PDF 30.2 KB) Date
Notice EXN Voltage North Island Motunui McKee Stratford 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Huntly Stratford Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage South Island Multiple Trippings, Cromwell Frankton 1Auto-reclosed, Cromwell Frankton 2 Auto-reclosed, Frankton T1 Tripped,Frankton T3 Tripped (PDF 30.29 KB) Date
Notice EXN Voltage North Island Ngawha Generation Tripped (PDF 30.14 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage South Island Roxburgh Three Mile Hill 2 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Mangamaire Woodville Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage North Island Kawerau TOPP2 generation tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Auto-reclosed (PDF 30.24 KB) Date
Notice EXN Frequency North Island Arapuni Hangatiki Auto-reclosed (PDF 30.8 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Tuai Feeder Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage North Island Ngawha Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Drury Takanini Otahuhu 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage South Island Islington Southbrook 1 Auto-reclosed (PDF 30.17 KB) Date

System Operator