TL;DR: Ka ārai te hononga porowhita ātete wai IP55 i te puehu me ngā rerenga wai iti-pēhanga, koia te whakatauranga iti rawa e taea ana mō ngā whare hiko o waho e kitea ana. Ko ngā hononga miro M12 (IEC 61076-2-101) te whiringa matua mō ngā hononga tohu me te hiko o waho nā te mea ko tā rātou miro hononga 12 mm, me te hiri O-ring, ka tukuna he pēhanga hononga ōrite. Ko te nuinga o ngā whakaurunga o waho kāore e hiahia ki te IP67. He iti ake te utu o te IP55, he māmā ake te tiaki, ā, he rawaka mō te ua, te puehu, me te horoi i ētahi wā. Kei te whakatakotoranga M12 ngā momo waehere (A, B, D, X) e ārai ana i te hononga rerekē. Mena kei te pāngia tō whare e ngā āhuatanga ua tika, e te mōrearea rānei o te ruku, piki ake ki te IP65, IP67 rānei. Ki te kore, ka roa te hononga IP55 M12 pai te hanga me te whare parahi whakakikoruatia ki te nikara me te mowhiti O-ring silicone mō te rima ki te waru tau ki waho.

Ehara te hononga porowhita ā-wai i te mea tino pakari o te mākete, he IP55 te tohu. Kāore e taea te ruku. Kāore e ora i te horoi pehanga i te tawhiti tata. Heoi, koinei te tohu kotahi e tino kitea ana mō ngā whare hiko o waho, ngā pouaka hononga, ngā taraiwa LED, me ngā kāpata telemetry puta noa i te ao. He aha ai? Nā te mea ko te nuinga o ngā hiko o waho kāore e rukuhia. Ka uaina, ka horoia te puehu, ā, i ētahi wā ka horoia ki te wai e te kapa tiaki. Ko te IP55 te mea tika mō tēnā.

Ko te "IP" i roto i te IP55 e tohu ana i te Ingress Protection, i whakakōwaeatia i raro i IEC 60529Ko te mati tuatahi, 5, e tohu ana kei te tiakina te whare mai i te puehu — he iti noa te urunga mai, engari kāore e ranea hei whakararuraru i te mahi. Ko te mati tuarua, 5, e tohu ana ka taea e ia te tu atu i ngā pupuhi wai iti-pēhanga mai i te pūwero 6.3 mm i te 12.5 rita ia meneti mō ngā meneti e toru. Ehara tēnā i te pītiti. He pupuhi e ārahihia ana. Mena kei raro i te tuanui, i te tuanui rānei tō whare, kei te pāngia rānei e te ua e te hau, ko te IP55 te paerewa e hiahiatia ana e ngā tohunga hiko me ngā tohunga motuhake.

Ko ngā hononga miro M12 te mea nui rawa atu i tēnei wāhanga nā te mea he iti, he paerewa, ā, he pono hoki ki te miihini. Ko te miro hononga 12 mm, i tautuhia i roto i IEC 61076-2-101, i hangaia e Lumberg i te tau 1985, ā, i muri mai ka whakaaetia e te IEC i te tau 2003. I noho hei atanga taunoa mō ngā pūoko ahumahi, ngā kaiwhakaoho, me ngā I/O tohatoha. Ina kite koe i tētahi kāpata whakahaere o waho me tētahi hononga porowhita iti e wero ana i roto i te taha taha, he tūponotanga he M12. Ehara te miro i te hiri. Ko te hiri ko te mowhiti-O e pēhia ana i waenganui i te mono me te ipu i te wā e whakakī ana te miro. Mā te pēhi tika, ka hangaia he arai IP55 — he maha ngā wā IP65, IP67 rānei — mā taua pēhitanga.

Engari ehara te kōrero tūturu i te paerewa. Ko te kōrero tūturu ko te mea ka puta ina hē koe.

Te Tūponotanga Tuturu Kāore he Tangata e Kōrerohia Ana

Ko te nuinga o ngā pakaru o ngā hononga o waho ehara i te mea tino nui. He puhoi. Ka mimiti te wai mā roto i te mowhiti-O kua pakaru i roto i ngā marama e ono. Ka nui haere te waikura i roto i te anga hononga. Ka waikura ngā hononga. Ka piki ake te ātete. Ā tōna wā ka heke te tohu, ka pakaru rānei te kaiwawao, ā, ka taraiwa te kapa tiaki mō ngā haora e rua ki tētahi kāpata mamao, ā, ka kitea kua pakaru te pūmana $2,000 i tētahi hononga $4.

Kua kite ahau i tēnei tauira e pūmau ana puta noa i ngā ahumahi. He pāmu hiko pūngao rā i Nevada e whakamahi ana i ngā hononga IP55 i runga i ana pouaka whakakotahi. He pai te puehu koraha kia puta i roto i ngā atanga kāore i te hiritia. Neke atu i te rua tau, ka piki ake te ātete pa o ngā hononga hiko M12 kia puta ai te wera. Ka tere ake te pirau o te mowhiti-O e te wera. Ka whāngai te huringa i a ia anō. I roto i tētahi whakaurunga takutai moana i Florida, ka tere ake te mahi a te kohu tote i te mea kotahi. Ko te hononga he IP55, engari ko te rauemi whare he koranu konutea paerewa kāore he whakakikorua nikara. Ka kainga e te waikura te miro. Kāore e taea e te kaiwhakauru te whakau i te hononga ki te taipana kua tohua. Ka pakaru te hiri.

Ehara i te mea nā te "ngoikore rawa o te IP55" ēnei hapa. Engari nā te whakamahinga o te IP55 ki te rauemi hē, te tāutanga hē, te wātaka tiaki hē rānei. E tautuhia ana e te paerewa ngā tikanga whakamātautau. Kāore e whakamana i te mahi o te mara. Nāu tēnā mahi.

Ko te utu te mea e mamae ai, ehara i te whakatakotoranga. Ka hokona e te kaiwhakahaere kaupapa ngā hononga IP55 nā te mea he haurua te utu o ngā waeine IP67. He mā te āhua o te pepa hoko. E toru tau i muri mai, ka tīmata ngā kereme whakamana. Ka huri mārire te utu katoa o te mana. Ko te mea i rite ki te penapena ka huri hei nama. Ko taku tūnga ake: ki te mea kei te tāuta koe i waho, ā, kāore e taea e koe te pā atu ki ngā hononga mō ngā tau e toru, kaua e hoko i te waeine IP55 iti rawa te utu. Hokona te mea he pai rawa te rauemi O-ring me te whakakikorua nikara matotoru. E kore rawa koe e pouri.

Te Tikanga Tuturu o te IP55

He kupu whakaari motuhake te IP55, ehara i te kereme koretake mō te "ātete wai." E ai ki te IEC 60529, ka whakamahia e te whakamātautau puehu (mati tuatahi 5) he rūma paura talc me te tango korehau. Ka whakamatautauria te hononga mō te waru hāora. Ka whakaaetia te urunga puehu iti, engari kaua e whakararuraru i te mahi, i te haumaru rānei. Ka rehuhia e te whakamātautau wai (mati tuarua 5) te wai mai i te pūwero 6.3 mm i te 12.5 rita ia meneti mai i tētahi taha mō ngā meneti e toru. Ko te tawhiti o te whakamātautau he tata ki te 3 mita. Kaua te hononga e tuku i te wai ki ngā rahinga e whakararuraru ana i te mahi.

Anei te kōrero nui: e whakaaro ana te whakamātautau IP55 kei roto te hononga i tōna tūranga mahi noa. Mena kei te whakairihia tō pouaka ki raro, ki te anga whakarunga rānei te hononga, ka taea e te wai te pupū i ngā huarahi kāore i whakaarohia e te paerewa. Kāore te kaha ā-papa i roto i te kawa whakamātautau. Kua kite ahau i ngā hononga M12 e whakairihia ana me te ipu e anga tika ana ki runga, e kohikohi ana i te wai ki roto i te kōhao miro. Ahakoa ngā waeine IP67 ka raru pea ki tēnā.

Inaianei whakatairitea te IP55 ki ōna hoa tata. Ka tiaki te IP54 i te tauhiuhi wai, ehara i te wai pupuhi. He ātete puehu te IP65, ā, he ātete hoki ki te wai pupuhi. Ka tāpirihia e te IP67 te rumaki rangitahi. He iti ake te āputa i waenga i te IP55 me te IP65 i te āputa i waenga i te IP55 me te IP54. Ko te IP55 te whakatauranga tuatahi e kaha ana te pana o te wai ki te whare, kāore e tukua kia taka noa ki runga. Mō ngā whare o waho i raro i ngā tuanui, i ngā āhuarangi ngawari rānei, ko te IP55 te wāhi pai. Mō ngā taiao horoi takutai, pārūrū, teitei rānei te pēhanga, ko te IP65 te papa haumaru ake.

Ko te ōrite o Amerika Te Raki ko NEMA 3, 3R rānei, e tata ana ki te IP55 i raro i te Nama 250 paerewa. Heoi, kei roto i ngā whakatauranga NEMA ngā whakamātautau tāpiri mō te hanganga hukapapa, te waikura, me ngā pakaru o ngā paipa o waho kāore e hipokina e te IEC 60529. Kāore e taea te whakawhiti i ngā pūnaha e rua. Mena kei te hoko koe ki Amerika Te Raki, me whai rārangi NEMA koe. Mena kei te hoko koe ki Ūropi, ko te IEC 60529 te ture. He maha ngā kaihanga o te ao e whakamana ana i ngā mea e rua hei karo i te raruraru mākete.

Miro M12: He aha i noho ai hei Taunoa

Ehara i te mea ko te hononga M12 anake te momo porowhita ātete-wai. He iti ake te M8 engari he iti ake te iahiko. He nui ake te mana e taea ana e te M16 me te M23 engari he nui ake te wāhi e hiahiatia ana e te panera, ā, he nui ake te utu. Ko te M12, he 12 mm te whānui o te miro, kei waenganui. He nui te iahiko e mau ana mō ngā pūoko me ngā kaiwhakaoho iti (tae atu ki te 16A i runga i ngā momo mana). He iti noa iho hei uru mā roto i te kōhao panera 16 mm. He iti te utu hei whakakapi me te kore tautohetohe mō te ota hoko.

Ko te tino pūkenga o te M12 ko te pūnaha waehere. Kei ngā hononga waehere-A ngā pūoko me te hiko DC. Ko te waehere-B mō Profibus. Ka taea e te waehere-D te whakahaere i te Ethernet 100 Mbps. Ka pana te waehere-X ki te 10 Gbps. Ka taea e ngā waehere K, L, S, me T te whakahaere i te hiko AC tae atu ki te 630V. Mā tēnei kī ā-tinana ka ārai i te kore e ōrite. Kāore e taea e koe te mono pōrearea i tētahi taura Ethernet ki tētahi ipu hiko 230V. I ngā whakaurunga o waho, i te wā e mahi ana ngā tohunga hangarau i te pō, i te ua, me te pēhanga o te wā, ehara tēnei i te mea ngāwari. He āhuatanga haumaru.

He māmā noa iho te tikanga o te miro. He miro M12 x 1.0 kei waho o te mono tāne. He nati hononga taumau kei te ipu uwha. I te whakakīkī o te nati, ka pēhia e te mata o mua o te mono te mowhiti-O e noho ana i roto i te awaawa o te ipu. Ka mau tonu te miro i te ātete miihini me te wiri. Ka whakaratohia e te mowhiti-O te hiri. Ko te kounga o te hiri e whakawhirinaki ana ki ngā mea e toru: te rauemi o te mowhiti-O, te ōrau pēhanga, me te mutunga o te mata.

Ko ngā mowhiti-O silicone te mea noa mō te whakamahinga o waho. Ka taea te tu atu i te -40°C ki te +200°C, te ātete ki te UV, ā, ka noho ngāwari tonu. E hiahiatia ana te Fluoroelastomer (FKM/Viton) mō te pānga ki te wahie, ki ngā hinu, ki ngā pāmahana teitei tonu rānei. Ka taea te pupuri e te EPDM te mamaoa engari he ngoikore ki te hinu. He iti te utu o te NBR engari ka pirau i te rā. Mō ngā whare hiko o waho, ko te silicone te mea haumaru. Mō te moana, mō te takutai moana rānei, ko te FKM te mea haumaru.

Ko te mea nui ko ngā rauemi o roto. Ko te parahi whakakikoruatia ki te nikara te mea tino pai mō te ātete ki te waikura me te roa o te miro. He iti ake te utu o te konutea me te whakakikoruatia ki te nikara, ā, he pai hoki mō te nuinga o ngā taiao ahumahi. Ko te PA66 whakakīia ki te karāhe te kōwhiringa iti rawa mō ngā tono kore-tino nui. He mama, he ngāwari te hanga engari ka pakaru i raro i te taipana nui rawa. Ko te kowiri tira 316 te paerewa koura moana. E toru ki te rima ngā wā he nui ake te utu i te parahi whakakikoruatia ki te nikara.

Ko ngā hononga he parahi whēru, he koura te whakakikorua ki runga i te nikara. Ko te matotoru o te koura kei waenga i te 0.1 ki te 1.0 maikorona. Ko te whakakikorua matotoru ka ora i ngā huringa honohono maha atu. Ko te hononga M12 paerewa e whakatauria ana mō te 100 ki te 500 huringa honohono. Ko ngā momo kounga teitei ka eke ki te 5,000, neke atu rānei. Mō ngā whakaurunga o waho pumau ka pāngia kotahi i te tau i te wā tiaki, he nui te 100 huringa. Mō ngā taputapu whakamātautau, mō ngā mīhini kawe rānei, ko te 500 te iti rawa.

Āhea te IP55 e Rawa Ana, ā, Āhea Kāore e Rawa Ana

He rawaka te IP55 ina poutū te whare, ko te ua te puna wai matua, ā, ko te puehu he matūriki noa o te tāone, o te ahumahi rānei. Kei roto katoa i tēnei kāwai ngā rama tiriti, ngā kāpata whakahaere waka, ngā waeine waea mamao, me ngā pouaka whakakotahi pūngao rā. Kāore te hononga i raro i te wai. Kāore e horoia ana ki te mamaoa. E uaina ana, ā, i ētahi wā ka murua.

Kāore e ranea te IP55 ina tata te wāhi ki te taumata whenua i ngā wāhi e pāngia ana e te waipuke, ina whakamahia te horoinga pēhanga teitei (te tukatuka kai, te ahuwhenua), ina kore rānei e honoa te hononga i ngā āhuatanga mākū. E ai ki ngā tohunga hononga, ko te whakatauranga IP o tētahi pūnaha hononga e pā ana ki te āhua o te hononga. Kia momotuhia te hiko, ka heke te ipu ki te IP55, ki raro iho rānei, ki te kore e whakauruhia he taupoki puehu hiri. Koia te take me mau tonu te IP55 o ngā hononga utu EV ahakoa kua tangohia te kakau mai i te waka. He uaua ake te whakamātautau, ā, e whakaata ana te utu i tēnā.

Ko tāku tohutohu mō te hoko: tīmata ki te IP55 mō te 80%. Whakamahia te IP65 mō ngā taiao takutai moana, pārūrū, koraha puehu nui rānei. Whakamahia te IP67 anake ina he tino mōrearea te ruku wā poto — ngā rūma raro whenua, ngā poka wai, ngā papa moana. Ko te IP68 mō te ruku tonu, ā, he nui rawa mō te 95% o ngā whare hiko o waho. Ia pikinga ake ka tata ki te rua te utu hononga. Ka piki ake hoki te utu o te whare nā te mea ka kaha ake te rauemi o te gasket, te tikanga raka, me ngā ātete hanga.

He mahanga hoko e kitea ana e au i ngā wā katoa: te hoko hononga IP67 me te whakamau i roto i te pouaka IP55. Ko te hononga ngoikore ko te pouaka. Ka tomo te wai mā te hiri o te tatau, ka kaukau ki raro, ka ruku i te hononga. Ka ora te hononga IP67. Kāore te pouaka. Ka rahua te pūnaha. Tauritehia te hononga ki te pouaka. Tauritehia te pouaka ki te taiao. Kaua e whakanui rawa i tētahi wāhanga, kaua hoki e whakaiti i te taurite o te toenga.

He Take mai i te Marae

I te tau 2023, i whakamahia e tētahi kaupapa rama LED ahumahi i Texas ngā hononga IP55 M12 ki runga i ngā kāpata whakahaere o waho e 300. He mārama ngā whakatakotoranga: IP55, he pouaka A-waehere, he pine-4, he whare parahi whakakikoruatia ki te nikara, he mowhiti-O silicone. I tukuna e te kaihoko i runga i ngā whakatakotoranga. I ma te tāutanga. I roto i ngā marama e waru, ka tīmata te tae mai o ngā pūrongo rahunga mai i te taha hauauru o te papaanga.

I whakaatuhia e te rangahau he take māmā noa iho: i anga atu ngā kāpata o te hauauru ki te hau nui, i haria mai ai te puehu caliche pai rawa atu i tētahi papa hanga tata. Ko te whakamātautau puehu IP55 e whakamahi ana i te talc. He koi ake te puehu caliche, he koi ake, ā, kei roto ko te konupūmā kāponāte. I uru te puehu ki te whare hononga i roto i ngā rahinga kāore i whakaarohia e te paerewa. Kāore i puta he pakaru tonu. Engari, i kohia ki te taha o te awaawa O-ring, ka hanga he paraoa huri. I ia wā ka momotuhia e te tiaki he taura hei whakamātautau, ka whiua te mata o te O-ring e te puehu. I muri i ngā momotu e ono, ka pakaru te hiri. I uru te wai i te wā ua e whai ake nei. I waikura ngā hononga. I mate ngā rama.

Ko te whakatikatika ehara i te whakapai ake ki te IP67. Engari ko te huri ki ngā hononga IP65 e ārai ana i te puehu me te ōwehenga kōpeketanga O-ring he paku piri ake, me te tāpiri i te taupoki puehu mō tētahi ipu kore hononga. Ko te pikinga utu he $0.40 mō ia hononga. I heke te auau rahunga ki te kore. Ko te akoranga: Ka taea e te IP55 te whakahaere i te whakamātautau. Kāore e taea e ia te whakahaere i ngā āhuatanga katoa o te mara. He mea nui ake te mōhiotanga ā-rohe i te pepa whakatakotoranga.

Te Hoko me te Kore Aroha

Ina rapu koe i ngā hononga porowhita ā-wai mō ngā whare o waho, pātai atu ki te kaihoko e rima ngā pātai. Tuatahi: he aha te whakatauranga IP tuturu, ā, kua whakamanahia e te taiwhanga tuatoru, kua whakapuakina rānei e te tangata ake? Tuarua: he aha te rauemi O-ring, ā, he aha te awhe pāmahana? Tuatoru: he aha te whakatauranga huringa taumau, ā, e tutuki ana te matotoru o te whakakikoruatanga whakapā ki tō kaupapa tiaki? Tuawhā: he hototahi te rauemi whare ki tō taiao — koranu konutea mō te ahumahi maroke, te nikara parahi mō te waho whānui, te maitai kore waikura mō te moana? Tuarima: he aha te rahi o te kōhao o te panera me te roa o te hononga miro, ā, e rite ana ki te hoahoa o tō whare?

Kaua e whakaae ki ngā whakautu koretake. He kereme noa iho te "whakatauranga IP55" me te kore he tiwhikete whakamātautau. Ka whakaratohia e te kaiwhakarato whai mana he pūrongo whakamātautau IEC 60529, he tiwhikete tutuki i te RoHS, me te pepa raraunga rauemi. Ki te kore e taea, me rapu tonu. Ehara i te mea ko te utu hononga anake te utu o te hononga kua pakaru i roto i te kāpata mamao. Ko te mahi, ko te haere, ko te wā kore mahi, me te amuamu a te kiritaki.

Ko ngā raina hua e pā ana ki ngā kaihanga panera ko ngā poraka pito me ngā pūnaha whakahaere waea e whakangawari ana i te waea o te whare herehere. Hei tauira, ko te Poraka whakamutunga pana-roto reriwe DIN PCT-211 ka whakaitihia te wā waea mā te whakakore i ngā tirotiro taipana tīwiri. Ka pupuri te hononga puna-rawhi i te pēhanga whakapā mā te wiri me te huringa pāmahana, he mea nui tēnei i roto i ngā kāpata o waho e horapa ana te wera i ia rā. Tirotirohia te katoa rārangi hononga me te poraka pūrua mō ngā wāhanga o te kete tāpiri.

Kotahi te mea whakamutunga mō te taipana. Me whakau te miro M12 kia rite ki te whakaritenga a te kaihanga, arā, 0.8 ki te 1.2 Nm. Ka pēhia te mowhiti-O e te taipana nui rawa atu ki tua atu i tōna rohe ngāwari. Ka huri tōna āhua mō ake tonu atu, ā, kāore e ora anō. Ka waiho ngā āputa e te taipana iti rawa. Whakamahia he kī taipana. Kaua e whakaaro noa. Ko te rerekētanga i waenga i te hononga piri me te hononga hiri he mea ine, ehara i te mea ngāwari noa iho.

Ngā Pātai Auau

Ka taea te whakamahi i ngā hononga IP55 i te wā ua tika?

Āe, kua whakatauria te IP55 mō ngā pupuhi wai iti-pēhanga mai i ngā taha katoa, tae atu ki te ua e peia ana e te hau. Heoi, ki te whakairihia te hononga whakapae, ki te anga whakarunga rānei, ka taea e te wai te pupū ki roto i te kōhao miro. Whakairihia poutū, whakairihia rānei ki te koropiko maturuturu i ngā wā katoa e taea ai.

He aha te rerekētanga i waenga i te waehere-A M12 me te waehere-D?

Ko te waehere-A he mea mō ngā pūoko me te hiko DC, e 2 ki te 8 ngā pine. Ko te waehere-D he mea mō te Ethernet 100 Mbps, e 4 tonu ngā pine. Mā te kī ā-tinana ka ārai i te hononga o te mono waehere-A ki te ipu waehere-D. Kōwhiria te waehere-A mō te tohu whānui me te hiko. Kōwhiria te waehere-D mō te Ethernet ahumahi.

He rawaka te IP55 mō ngā taiao takutai moana?

Ka ārai te IP55 i te ua me te puehu, engari he rerekē te raruraru o te kohu tote. Ka tere ake te waikura o te miro o te whare me te whakakikorua o ngā mea e pā ana ki te tote. Mō ngā whakaurunga takutai, whakamahia te IP65 hei iti rawa, ā, tohua ngā whare parahi whakakikoruatia ki te nikara, ki te kowiri tira rānei. Whakaarohia ngā mowhiti-O FKM mēnā kei te kitea anō hoki te hinu.

Kia pēhea te roa o te ora o tētahi hononga IP55 M12 i waho?

Mō ngā mowhiti-O silicone me ngā whare parahi whakakikoruatia ki te nikara, e rima ki te waru tau te roa o te whakamahinga i ngā āhuarangi mahana. I ngā taiao kino - te UV teitei, te pāmahana tino kino, te pānga ki ngā matū - ka heke te roa o te whakamahinga ki te rua ki te whā tau. Ko te tirotiro ā-tau me te whakakapi i ngā mowhiti-O te mahi tiaki pai rawa atu.

Ka taea e au te whakapai ake i tētahi hononga IP55 ki te IP67 mā te whakarerekē i te mowhiti-O?

Kāo. He āhuatanga taumata-pūnaha te whakatauranga IP. Ko te hoahoa o te whare, te roa o te hononga miro, te hiri o te panera, me te repe taura katoa e whai wāhi ana. Kāore e taea e koe te whakatutuki i te IP67 mā te whakawhiti i tētahi mowhiti-O ki tētahi hononga IP55. Mena e hiahia ana koe ki te IP67, hoko mai i tētahi hononga kua whakataurangahia ki te IP67 i hangaia mōna.

He aha te diameter o te taura e tau ana ki te repe taura M12?

Ka whakaaetia e ngā taura M12 paerewa te diameter o te taura mai i te 3.5 mm ki te 6.0 mm. Tirohia te pepa raraunga o te taura mō te whānuitanga tika. Kāore e hiritia e te taura iti rawa. Ka taumaha ngā miro o te taura nui rawa. I roto i te mahi, ka whakakorea e ngā āhuatanga e rua te whakatauranga IP.

Kāore e tino whakahihiri ngā hononga porowhita ā-wai kua whakatauria he IP55. Ehara i te mea he rauemi matua. Ko rātou te mea tino pai mō ngā hanganga hiko o waho. Kōwhiria te rauemi tika, tāutahia me te tupato, tirohia ia tau, ā, ka roa ake te ora i ngā taputapu e honoa ana e rātou. Kōwhiria he mea kino, ā, ka mutu te mahi a te pūnaha $50,000 mēnā he wāhanga $4. He māmā noa te whakatau. Ko te tikanga te mea e wehewehe ana i ngā tāutanga pono mai i ngā akoranga utu nui.