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.

July
Notice Date
Notice EXN Voltage North Island Multiple Trippings, Bunnythorpe Mangahao 2Tripped, Mangahao T4 Tripped Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Ngawha Generation Tripped Date
Notice EXN Voltage North Island Edgecumbe Waiotahi 2 Auto-reclosed Date
Notice EXN Frequency South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Ngawha Generation Tripped Date
Notice EXN Voltage North Island Waiotahi feeder tripped Date
Notice EXN Frequency/Voltage National Tiwai Reduction Line Date
Notice EXN Voltage South Island Kikiwa Stoke 3 Auto-reclosed Date
Notice EXN Voltage South Island Stoke 66kV Feeder tripped Date
Notice EXN Voltage South Island Stoke 66kV Feeder tripped Date
Notice EXN Voltage South Island Stoke 66kV Feeder tripped Date
Notice EXN Voltage North Island Stoke 66kV Feeder tripped Date
Notice EXN Frequency/Voltage National HVDC Equipment Tripped Date
Notice EXN Voltage North Island Mount Maunganui T3 Tripped Date
Notice EXN Voltage South Island Dobson Reefton Inangahua 2 Auto-reclosed,Reefton T3 Tripped Date
Notice EXN Voltage North Island Te Huka 3 Generation Tripped Date
Notice EXN Frequency/Voltage South Island Tiwai Line trip Date
Notice EXN Voltage South Island Livingstone Norwood 1 Tripped Date
Notice EXN Voltage North Island Maungatapere feeders tripped Date
Notice EXN Voltage North Island Huirangi T6 Tripped Date
Notice EXN Voltage South Island Halfway Bush Roxburgh 2 Auto-reclosed Date
Notice EXN Frequency/Voltage South Island Generation setpoint change Date
June
Notice Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted Date
Notice EXN Voltage North Island Multiple Trippings, Kinleith Tarukenga 2Auto-reclosed, Lichfield T2 Tripped Date
Notice EXN Frequency South Island Tiwai Reduction Line Date
Notice EXN Voltage South Island Cobb Generation Tripped Date
Notice EXN Voltage North Island Henderson Maungatapere 2 and Wellsford T1Auto-reclose Maungaturoto T2 Tripped Date
Notice EXN Voltage North Island Tauhara Generation Tripped Date
Notice EXN Voltage North Island Penrose STC 1A Tripped Date
Notice EXN Frequency South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed, EdgecumbeWaiotahi 2 Auto-reclosed, Edgecumbe Feeder Auto-reclosed Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed, EdgecumbeWaiotahi 2 Auto-reclosed, Edgecumbe Feeder Auto-reclosed Date
Notice EXN Voltage North Island Multiple Trippings, Henderson Maungatapere 2Auto-reclosed, Maungaturoto T2 Tripped Date
Notice EXN Voltage South Island Islington SVC9 Tripped Date
Notice EXN Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage South Island Tiwai Reduction Line Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Opunake Kapuni Stratford 2 Tripped Date
Notice EXN Voltage North Island Bunnythorpe Mataroa Tripped Date
Notice EXN Voltage North Island Haywards Synchronous Condenser 10 Tripped Date
Notice EXN Voltage North Island Penrose T21 Tripped. Date
Notice EXN Voltage North Island Arapuni Kinleith 2 Auto-reclosed Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed Date
Notice EXN Voltage North Island Arapuni Bombay 1 Tripped Date
May
Notice Date
Notice EXN Voltage South Island Inangahua Kikiwa 1 Tripped Date
Notice EXN Voltage North Island Hinuera Karapiro Tripped Date
Notice EXN Voltage South Island Islington T3 Tripped Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed Date
Notice EXN Voltage North Island Tokaanu Whakamaru 2 Auto-reclosed Date
Notice EXN Voltage North Island Arapuni Bombay 1 Tripped Date
Notice EXN Voltage South Island Inangahua Kikiwa 2 Auto-reclosed Date
Notice EXN Voltage National Date
Notice EXN Voltage South Island Benmore Filter 6 tripped Date
Notice EXN Voltage South Island Tiwai Reduction Line tripped Date
Notice EXN Voltage North Island Otahuhu Huatapu Whakamaru 2 tripped Date
Notice EXN Voltage North Island Bunnythorpe Paraparaumu Haywards 2Auto-reclosed, Paraparaumu T2 Tripped Date
Notice EXN Voltage North Island Te Huka 3 Generation Tripped Date
Notice EXN Voltage South Island Blenheim Stoke 1 Auto-reclosed Date
Notice EXN Voltage North Island Bream Bay Marsden Auto-reclosed Date
Notice EXN Voltage North Island Junction Road Generation Tripped Date
Notice EXN Voltage South Island Edendale Invercargill 1 Auto-reclosed Date
Notice EXN Voltage North Island Bunnythorpe Woodville 1 Auto-reclosed Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted Date
Notice EXN Voltage National Benmore Haywards 1 (HVDC Pole 3) line faultedand restarted Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted Date
Notice EXN Voltage National Benmore Haywards 2 (HVDC Pole 2) line faultedand restarted Date
Notice EXN Voltage North Island Haywards Feeder Tripped Date
Notice EXN Voltage North Island Gracefield Haywards 2 Tripped, Gracefield T5Tripped Date
Notice EXN Voltage National Benmore Haywards 2 Tripped Date
Notice EXN Voltage North Island Gracefield Haywards 2 Auto-reclosed,Gracefield T5 Auto-reclosed Date
Notice EXN Voltage North Island Haywards Feeder Tripped Date
Notice EXN Voltage North Island Haywards Feeder Tripped Date
Notice EXN Voltage North Island Haywards Feeder Tripped Date
Notice EXN Voltage North Island Marsden STC 6 Tripped Date
Notice EXN Voltage North Island Stratford Generation Tripped Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Auto-reclosed Date
April
Notice Date
Notice EXN Voltage South Island TWI PotlineTripped Date
Notice EXN Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Kinleith Tarukenga 1 Auto-reclosed Date
Notice EXN Voltage South Island Whitehill Generation Tripped Date
Notice EXN Voltage South Island Balclutha Halfway Bush 1 Auto-reclosed Date
Notice EXN Voltage South Island Oamaru Studholme Bellspond Waitaki 2Tripped, Oamaru Blackpoint Waitaki 1 Tripped, Oamaru T1 Tripped, Oamaru T2Tripped Date
Notice EXN Voltage North Island Rangipo Generation Tripped Date
Notice EXN Voltage South Island Inangahua Murchison 1 Auto-reclosed, KikiwaMurchison 1 Auto-reclosed Date
Notice EXN Frequency National Huntly generation tripped Date
Notice EXN Voltage North Island Tuai Feeder Tripped Date
Notice EXN Voltage North Island Mangamaire Masterton Auto-reclosed Date
Notice EXN Frequency South Island Date
Notice EXN Voltage North Island Haywards Synchronous Condenser Tripped Date
Notice EXN Voltage North Island Matahina Generation Tripped Date
Notice EXN Voltage North Island Rangipo generator tripped Date
Notice EXN Voltage North Island Henderson Maungatapere 1 Auto-reclosed,Henderson Maungatapere 2 Auto-reclosed, Maungaturoto T1 Tripped, MaungaturotoT2 Tripped Date
Notice EXN Voltage North Island Redclyffe Tuai 1 Auto-reclosed Date
Notice EXN Voltage North Island Arapuni Hangatiki Ongarue 1 Auto-reclosed Date
Notice EXN Voltage North Island Huntly Te Kowhai 1 Tripped Date
Notice EXN Voltage National Benmore Haywards 1 Tripped Date
Notice EXN Voltage North Island Hawera Waverley Auto-reclosed Date
Notice EXN Voltage South Island Manapouri Generation Tripped Date
Notice EXN Voltage North Island Kinleith Tarukenga 1 Auto-reclosed,Lichfield T1 Tripped Date
Notice EXN Voltage South Island Multiple Trippings, Studholme T5 Tripped,Studholme T6 Tripped, Studholme Timaru 1 Tripped Date
Notice EXN Voltage South Island Hokitika Otira 2 Tripped Date
Notice EXN Voltage North Island Huntly Generation Tripped Date
Notice EXN Frequency North Island Huntly Generation Tripped Date
Notice EXN Frequency National Tauhara Generation Tripped Date
Notice EXN Voltage North Island Livingstone Norwood 1 Auto-reclosed Date
Notice EXN Voltage North Island Haywards Synchronous Condensers 7 and 8Tripped Date
Notice EXN Voltage North Island Haywards Synchronous Condensers 1 and 2Tripped Date
Notice EXN Voltage South Island Kaiwera Downs Generation Tripped Date
Notice EXN Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage South Island Kaiwera Downs Generation Tripped Date
March
Notice Date
Notice EXN Voltage North Island Te Mihi Generation Tripped Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Otahuhu Hautapu Whakamaru 1 Auto-reclosed Date
Notice EXN Voltage South Island Islington SVC9 Tripped, Livingstone Norwood1 Auto-reclosed Date
Notice EXN Voltage North Island Multiple Trippings, Redclyffe Whakatu 2Tripped, Whakatu T3 Tripped Date
Notice EXN Voltage North Island McKee Generation Tripped Date
Notice EXN Voltage North Island Huntly Generation Tripped Date
Notice EXN Frequency/Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Tangiwai T3 Tripped Date
Notice EXN Frequency National Huntly Generation Tripped Date
Notice EXN Frequency South Island Tiwai Reduction Line Date
Notice EXN - Kinleith Tarukenga 2 Date
Notice EXN Tiwai redution line tripped Date
Notice EXN Voltage North Island Mangamaire Masterton Auto-reclosed Date
Notice EXN Voltage North Island Brunswick Stratford 3 Auto-reclosed Date
Notice EXN Voltage North Island Hawera Stratford Auto-reclosed Date
February
Notice Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed Date
Notice EXN Voltage North Island McKee generation tripped Date
Notice EXN Voltage National McKee generation tripped Date
Notice EXN Voltage North Island Arapuni Kinleith 1 Auto-reclosed Date
Notice EXN Voltage North Island Kawerau Matahina 1 Tripped, Kawerau Matahina2 Tripped Date
Notice EXN Voltage North Island Hobson Street T12 Tripped Date
Notice EXN Voltage South Island Ashburton Timaru Twizel 1 Auto-reclosed Date
Notice EXN Voltage South Island Kikiwa STC 2A Tripped, Kikiwa STC 2B Tripped Date
Notice EXN Frequency South Island Tiwai Reduction Line Date
Notice EXN Voltage South Island Studholme Timaru 1 Auto-reclosed Date
Notice EXN Voltage North Island Rotokawa generation tripped Date
Notice EXN Voltage North Island Haywards Filter 4B tripped Date
Notice EXN Voltage South Island Manapouri Generation Tripped Date
Notice EXN Voltage North Island Tauhara Generation Tripped Date
Notice EXN Voltage North Island Stratford Taumarunui Auto-reclosed,Taumarunui T5 Tripped Date
Notice EXN Voltage North Island Rotorua feeder tripped, Loss of Connectionto Wheao generation Date
Notice EXN Voltage North Island Harapaki Tauhara 1 Auto-reclosed WhirinakiWairakei Auto-reclosed Date
Notice EXN Voltage North Island Penrose STC 1A Tripped Date
Notice EXN Voltage North Island Karapiro 110kV Bus Fault Date
Notice EXN Voltage North Island Matahina Generation Tripped Date
January
Notice Date
Notice EXN Voltage North Island Rotorua Tarukenga 1 Tripped Date
Notice EXN Voltage North Island Haywards Filter Bank 5 Tripped Date
Notice EXN Voltage North Island Edgecumbe Kawerau 2 Tripped Date
Notice EXN Voltage South Island Tiwai Reduction Line Date
Notice EXN Voltage North Island Penrose STC 1A Tripped Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed Date
Notice EXN Voltage South Island Islington Tekapo B Auto-reclosed Date
Notice EXN Voltage North Island Kinleith Generation Tripped Date
Notice EXN Voltage North Island Kawerau Matahina 2 Tripped Date
Notice EXN Voltage North Island Te Huka 3 Generation Tripped Date
Notice EXN Voltage South Island Inangahua Kikiwa 1 Auto-reclosed Date
Notice EXN Frequency National Nga Awa Purua Generation Tripped Date
Notice EXN Voltage South Island Islington Kikiwa 1 Auto-reclosed Date
Notice EXN Frequency North Island Huntly Generation Tripped Date
Notice EXN Voltage South Island Multiple Trippings, Naseby RoxburghAuto-reclosed, Naseby T1 Auto-reclosed Date
Notice EXN Voltage North Island Kinleith Generation Tripped Date
Notice EXN Voltage North Island Upper Hutt T1 Tripped Date
Notice EXN Voltage North Island Nga Awa Purua Generation Tripped Date
Notice EXN Voltage North Island Bunnythorpe Marton Wanganui 2 Tripped Date
Notice EXN Voltage South Island Blenheim Kikiwa 1 Auto-reclosed Date
Notice EXN Voltage South Island Livingstone Norwood 1 Auto-reclosed Date
Notice EXN Voltage North Island Bunnythorpe Woodville 2 Auto-reclosed Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed Date
Notice EXN Voltage South Island Coleridge Otira 1 Auto-reclosed Date
Notice EXN Voltage South Island Islington Kikiwa 1 Auto-reclosed Date