370 kVA Grounding A Transformer-22 / 0.11 kV|South Africa 2024

 

01 Izugbe

1.1 Ihe ndabere oru ngo

Nke a 370kVA earthing transformer na-ebupụ na South Africa na August, 2024. Isi voltaji bụ 22 kV, nke abụọ voltaji bụ 0.11 kV, transformer na-enweghị ibu mgbata changer, tapping nso bụ ± 2 * 2.5% na isi akụkụ, jụrụ oyi bụ ONAN.

N'ime usoro ọkụ ọkụ, mgbanaka mgbanaka bụ ihe ntụgharị pụrụ iche, ọ na-ebu ọrụ dị mkpa nke ichebe akụrụngwa, nchekwa nke onwe na imeziwanye ntụkwasị obi nke ọkọnọ ike. Onye na-agbanwe ihe na-eme ka ọ dị ala na-achọpụta nkwụsịtụ dị irè nke ebe na-anọpụ iche site na ụkpụrụ arụ ọrụ dị egwu, wee wepụ mmetụta nke ugbu a na-adịghị mma na usoro.

Ebumnuche nke mgbanaka mgbanaka bụ iji nye ebe na-anọpụ iche maka sistemụ ebe ebe a na-anọpụ iche adịghị adabere na ya, na iji kwado ojiji nke mkpuchi mkpuchi arc ma ọ bụ obere ụzọ nkwụsị ala. Ụkpụrụ ya na-arụ ọrụ bụ ịkụda ebe na-anọpụ iche na usoro ahụ ma webata ihe na-adịghị mma ugbu a na ala, iji nweta nchebe na ọrụ nchebe nke usoro ahụ. N'okpuru ọnọdụ nkịtị, ebe na-anọpụ iche nke ihe ngbanwe nke ala adịghị adabere na ya, ma mgbe mmejọ dị na usoro ahụ na-eme ka voltaji na-anọpụ iche na-ebili, onye ntụgharị ala ga-arụ ọrụ. Mgbe voltaji na-anọpụ iche na-ebili ruo n'ókè ụfọdụ, onye na-atụgharị ala ga-agbanye na-akpaghị aka ma gbanye ebe na-anọpụ iche, si otú ahụ na-ewebata ihe na-adịghị mma ugbu a na ala, na-egbochi voltaji ka ọ nọgide na-ebili, na-echebekwa ngwá ọrụ usoro na nchekwa onwe onye.

 

1.2 Nkọwa nka nka

370 kVA ụdị nkọwa nkọwa na mpempe akwụkwọ data

 

1.3 Eserese

370 kVA earthing transformer eserese na nha.

 

 

02 Nrụpụta

2.1 Isi

Isi ihe ngbanwe ala bụ nke mpempe akwụkwọ silicon steel, nke nwere ọnwụ hysteresis dị ala na ọnwụ eddy ugbu a, nke na-enyere aka melite arụmọrụ ike nke transformer. N'ime imewe, a na-emechikarị akaghị n'ụdị isi isi ka o wee nwee ike ịgbanwuo magnetik kwụsiri ike wee belata ntapu magnetik.

N'ime ihe ngbanwe dị n'ala, ọrụ bụ isi nke isi bụ inye ụzọ mgbagharị dị mma, ka onye ntụgharị ahụ wee nwee ike kewapụ ma gbanwee voltaji nke ọma. N'otu oge ahụ, isi ahụ na-enyekwa aka na-eduzi nkwụsị nke ugbu a na transformer na usoro ala, si otú a na-eme ka nchekwa nke usoro ahụ dịkwuo mma. Site n'ichepụta isi ihe ezi uche dị na ya, ụda na mkpọtụ nwere ike belata nke ọma, na nkwụsi ike nke akụrụngwa nwere ike imeziwanye.

Iji kwalite ikike mgbochi- na ndakọrịta elektrọnik nke ihe ngbanwe ala, a na-agwọkarị isi elu iji belata mfu ugbu a yana kwalite nguzogide ịka nká. Tụkwasị na nke ahụ, a na-eme ihe n'oge usoro mmepụta ihe iji belata ikuku ikuku dị n'ime ime ka ọ dịkwuo mma ma nweta ọrụ dị elu. N'ozuzu, isi ígwè nke ihe ngbanwe nke ala abụghị naanị nkwa nke ịrụ ọrụ eletrik, kamakwa akụkụ dị mkpa nke ịhụ na ọrụ nchekwa na ntụkwasị obi nke akụrụngwa.

 

2.2 Ikuku

 

2.3 tank

 

2.4 Mgbakọ ikpeazụ

 

 

03 Nnwale

1. Ụdị ule

● Nnwale ebili okpomọkụ: Na-achọpụta na ịrị elu okpomọkụ dị n'ime oke ekwenyere.

● Mkpirisi -Nnwale mfu nke gburugburu na ibu: Na-atụ mkpụmkpụ - ihe mgbochi gburugburu yana mfu ibu.

● Mba-Mfu ibu na ule dị ugbu a: Na-enyocha arụmọrụ n'oge ọrụ anaghị arụ ọrụ{{0}.

● Nnwale arụmọrụ mkpuchi: Na-anwale ike eletriki nke sistemu mkpuchi.

2. Nnwale oge niile

● Ntụle Nguzogide DC: Na-enyocha njikọ ikuku na ịdị mma ihe.

● Na-atụgharị Ratio na Polarity Test: Na-akwado oke na polarity ziri ezi.

● Ugboro ike na-eguzogide ule voltaji: Na-enyocha ikike nguzogide voltaji nke sistemu mkpuchi.

● Nnwale Nguzogide Ala: Na-eme ka arụ ọrụ ntọala kwụsiri ike.

3. Nnwale pụrụ iche

● Nnwale Mmetụta ọkụ ọkụ: Na-eme ka àmụ̀mà na-akụ iji chọpụta nguzogide ihe mgbochi na-arị elu.

● Nnwale ịgbasa obere akụkụ: Na-achọpụta mwepu dị n'ime n'ime usoro mkpuchi.

● Ule mkpọtụ: Na-atụ ụda arụ ọrụ iji hụ na ọ ruru ụkpụrụ.

● Obere-Nnwale okirikiri: Na-enyocha ike igwe na nkwụsi ike thermal.

 

 

04 Mbukota na mbupu

05 Saịtị na nchịkọta

A na-ekewa ndị na-agbanwe ala dị ka ọkọlọtọ reactors. Ihe ngbanwe earthing (nọpụrụ iche coupler) bụ tranforma atọ{1} ejikọrọ na sistemụ ike iji nye njikọ ala na-anọpụ iche, nke enwere ike nweta ya ozugbo ma ọ bụ site na mgbochi. Igwe ngbanwe nke ala nwekwara ike inyekwu ibu enyemaka mpaghara.

N'oge otu {{0} mmejọ nke usoro, reactor na-amachi mmejọ nke ugbu a na ebe na-anọpụ iche ma na-emezi mgbake nke eriri ọkụ. Dị ka IEC 60076-6 si kwuo, a na-ejikọta reactor nke ala n'etiti ebe na-anọpụ iche nke usoro ike na ala iji mee ka njedebe nke eriri dị ugbu a na ala dị ka uru a chọrọ ma ọ bụrụ na njedebe nke ala na usoro.

Ihe ntụgharị earthing nwere ike inye ebe na-anọpụ iche na grid ike. A na-ejikarị njikọ ZN eme ihe. Njikọ Z- na-enye akara efu na efu{3}} usoro mgbochi. Enwere ike ijikọ transformer earthing na ọnọdụ YN+d.