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.

June
Notice Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted (PDF 30.25 KB) Date
Notice EXN Voltage North Island Multiple Trippings, Kinleith Tarukenga 2Auto-reclosed, Lichfield T2 Tripped (PDF 30.23 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage South Island Cobb Generation Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Henderson Maungatapere 2 and Wellsford T1Auto-reclose Maungaturoto T2 Tripped (PDF 30.23 KB) Date
Notice EXN Voltage North Island Tauhara Generation Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Penrose STC 1A Tripped (PDF 30.12 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.77 KB) Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed, EdgecumbeWaiotahi 2 Auto-reclosed, Edgecumbe Feeder Auto-reclosed (PDF 30.33 KB) Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed, EdgecumbeWaiotahi 2 Auto-reclosed, Edgecumbe Feeder Auto-reclosed (PDF 30.33 KB) Date
Notice EXN Voltage North Island Multiple Trippings, Henderson Maungatapere 2Auto-reclosed, Maungaturoto T2 Tripped (PDF 30.27 KB) Date
Notice EXN Voltage South Island Islington SVC9 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line (PDF 30.13 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line (PDF 30.13 KB) Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line (PDF 30.79 KB) Date
Notice EXN Voltage North Island Opunake Kapuni Stratford 2 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Bunnythorpe Mataroa Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Haywards Synchronous Condenser 10 Tripped (PDF 49.82 KB) Date
Notice EXN Voltage North Island Penrose T21 Tripped. (PDF 30.12 KB) Date
Notice EXN Voltage North Island Arapuni Kinleith 2 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Arapuni Bombay 1 Tripped (PDF 30.13 KB) Date
May
Notice Date
Notice EXN Voltage South Island Inangahua Kikiwa 1 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Hinuera Karapiro Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Islington T3 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Tokaanu Whakamaru 2 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage North Island Arapuni Bombay 1 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Inangahua Kikiwa 2 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage National (PDF 30.14 KB) Date
Notice EXN Voltage South Island Benmore Filter 6 tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Otahuhu Huatapu Whakamaru 2 tripped (PDF 30.16 KB) Date
Notice EXN Voltage North Island Bunnythorpe Paraparaumu Haywards 2Auto-reclosed, Paraparaumu T2 Tripped (PDF 30.23 KB) Date
Notice EXN Voltage North Island Te Huka 3 Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Blenheim Stoke 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Bream Bay Marsden Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Junction Road Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Edendale Invercargill 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Bunnythorpe Woodville 1 Auto-reclosed (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 National Benmore Haywards 1 (HVDC Pole 3) line faultedand restarted (PDF 30.19 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 North Island Haywards Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Tripped, Gracefield T5Tripped (PDF 30.17 KB) Date
Notice EXN Voltage National Benmore Haywards 2 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed (PDF 30.22 KB) Date
Notice EXN Voltage North Island Haywards Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Haywards Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Haywards Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Marsden STC 6 Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Stratford Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed (PDF 30.17 KB) Date
April
Notice Date
Notice EXN Voltage South Island TWI PotlineTripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line (PDF 30.17 KB) Date
Notice EXN Voltage North Island Kinleith Tarukenga 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Whitehill Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Balclutha Halfway Bush 1 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage South Island Oamaru Studholme Bellspond Waitaki 2Tripped, Oamaru Blackpoint Waitaki 1 Tripped, Oamaru T1 Tripped, Oamaru T2Tripped (PDF 30.34 KB) Date
Notice EXN Voltage North Island Rangipo Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Inangahua Murchison 1 Auto-reclosed, KikiwaMurchison 1 Auto-reclosed (PDF 30.22 KB) Date
Notice EXN Frequency National Huntly generation tripped (PDF 30.8 KB) Date
Notice EXN Voltage North Island Tuai Feeder Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Mangamaire Masterton Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Frequency South Island (PDF 30.77 KB) Date
Notice EXN Voltage North Island Haywards Synchronous Condenser Tripped (PDF 30.17 KB) Date
Notice EXN Voltage North Island Matahina Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Rangipo generator tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Henderson Maungatapere 1 Auto-reclosed,Henderson Maungatapere 2 Auto-reclosed, Maungaturoto T1 Tripped, MaungaturotoT2 Tripped (PDF 30.29 KB) Date
Notice EXN Voltage North Island Redclyffe Tuai 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Arapuni Hangatiki Ongarue 1 Auto-reclosed (PDF 30.19 KB) Date
Notice EXN Voltage North Island Huntly Te Kowhai 1 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage National Benmore Haywards 1 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Hawera Waverley Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage South Island Manapouri Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Kinleith Tarukenga 1 Auto-reclosed,Lichfield T1 Tripped (PDF 30.22 KB) Date
Notice EXN Voltage South Island Multiple Trippings, Studholme T5 Tripped,Studholme T6 Tripped, Studholme Timaru 1 Tripped (PDF 30.24 KB) Date
Notice EXN Voltage South Island Hokitika Otira 2 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Huntly Generation Tripped (PDF 30.14 KB) Date
Notice EXN Frequency North Island Huntly Generation Tripped (PDF 30.77 KB) Date
Notice EXN Frequency National Tauhara Generation Tripped (PDF 30.79 KB) Date
Notice EXN Voltage North Island Livingstone Norwood 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Haywards Synchronous Condensers 7 and 8Tripped (PDF 30.18 KB) Date
Notice EXN Voltage North Island Haywards Synchronous Condensers 1 and 2Tripped (PDF 30.18 KB) Date
Notice EXN Voltage South Island Kaiwera Downs Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line (PDF 30.14 KB) Date
Notice EXN Voltage South Island Kaiwera Downs Generation Tripped (PDF 30.15 KB) Date
March
Notice Date
Notice EXN Voltage North Island Te Mihi Generation Tripped (PDF 30.13 KB) Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line (PDF 30.79 KB) Date
Notice EXN Voltage North Island Otahuhu Hautapu Whakamaru 1 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage South Island Islington SVC9 Tripped, Livingstone Norwood1 Auto-reclosed (PDF 30.22 KB) Date
Notice EXN Voltage North Island Multiple Trippings, Redclyffe Whakatu 2Tripped, Whakatu T3 Tripped (PDF 30.19 KB) Date
Notice EXN Voltage North Island McKee Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Huntly Generation Tripped (PDF 30.13 KB) Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line (PDF 30.79 KB) Date
Notice EXN Voltage North Island Tangiwai T3 Tripped (PDF 30.12 KB) Date
Notice EXN Frequency National Huntly Generation Tripped (PDF 30.79 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 26.62 KB) Date
Notice EXN - Kinleith Tarukenga 2 (PDF 26.16 KB) Date
Notice EXN Tiwai redution line tripped (PDF 26.64 KB) Date
Notice EXN Voltage North Island Mangamaire Masterton Auto-reclosed (PDF 26.18 KB) Date
Notice EXN Voltage North Island Brunswick Stratford 3 Auto-reclosed (PDF 26.18 KB) Date
Notice EXN Voltage North Island Hawera Stratford Auto-reclosed (PDF 26.18 KB) Date
February
Notice Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island McKee generation tripped (PDF 30.11 KB) Date
Notice EXN Voltage National McKee generation tripped (PDF 30.11 KB) Date
Notice EXN Voltage North Island Arapuni Kinleith 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Kawerau Matahina 1 Tripped, Kawerau Matahina2 Tripped (PDF 30.16 KB) Date
Notice EXN Voltage North Island Hobson Street T12 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage South Island Ashburton Timaru Twizel 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Kikiwa STC 2A Tripped, Kikiwa STC 2B Tripped (PDF 30.16 KB) Date
Notice EXN Frequency South Island Tiwai Reduction Line (PDF 30.76 KB) Date
Notice EXN Voltage South Island Studholme Timaru 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Voltage North Island Rotokawa generation tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Haywards Filter 4B tripped (PDF 30.13 KB) Date
Notice EXN Voltage South Island Manapouri Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Tauhara Generation Tripped (PDF 30.13 KB) Date
Notice EXN Voltage North Island Stratford Taumarunui Auto-reclosed,Taumarunui T5 Tripped (PDF 30.18 KB) Date
Notice EXN Voltage North Island Rotorua feeder tripped, Loss of Connectionto Wheao generation (PDF 30.19 KB) Date
Notice EXN Voltage North Island Harapaki Tauhara 1 Auto-reclosed WhirinakiWairakei Auto-reclosed (PDF 30.22 KB) Date
Notice EXN Voltage North Island Penrose STC 1A Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Karapiro 110kV Bus Fault (PDF 30.24 KB) Date
Notice EXN Voltage North Island Matahina Generation Tripped (PDF 30.12 KB) Date
January
Notice Date
Notice EXN Voltage North Island Rotorua Tarukenga 1 Tripped (PDF 30.22 KB) Date
Notice EXN Voltage North Island Haywards Filter Bank 5 Tripped (PDF 30.16 KB) Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Tiwai Reduction Line (PDF 30.17 KB) Date
Notice EXN Voltage North Island Penrose STC 1A Tripped (PDF 30.12 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Kinleith Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Kawerau Matahina 2 Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Te Huka 3 Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage South Island Inangahua Kikiwa 1 Auto-reclosed (PDF 30.16 KB) Date
Notice EXN Frequency National Nga Awa Purua Generation Tripped (PDF 30.8 KB) Date
Notice EXN Voltage South Island Islington Kikiwa 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Frequency North Island Huntly Generation Tripped (PDF 30.78 KB) Date
Notice EXN Voltage South Island Multiple Trippings, Naseby RoxburghAuto-reclosed, Naseby T1 Auto-reclosed (PDF 30.23 KB) Date
Notice EXN Voltage North Island Kinleith Generation Tripped (PDF 30.15 KB) Date
Notice EXN Voltage North Island Upper Hutt T1 Tripped (PDF 30.12 KB) Date
Notice EXN Voltage North Island Nga Awa Purua Generation Tripped (PDF 30.14 KB) Date
Notice EXN Voltage North Island Bunnythorpe Marton Wanganui 2 Tripped (PDF 30.15 KB) Date
Notice EXN Voltage South Island Blenheim Kikiwa 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed (PDF 30.17 KB) Date
Notice EXN Voltage North Island Bunnythorpe Woodville 2 Auto-reclosed (PDF 30.18 KB) Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed (PDF 30.15 KB) Date
Notice EXN Voltage South Island Islington Kikiwa 1 Auto-reclosed (PDF 30.15 KB) Date

System Operator