Ƙungiyar Harkokin Walƙiya (LPZ)
A cikin daidaitattun IEC, mahimmancin nau'ikan 1 / 2 / 3 ko nau'in 1 / 2 / 3 nau'in haɗari mai zurfi yana da kyau sosai. A cikin wannan labarin, za mu gabatar da ra'ayi wanda yake da dangantaka da kalmomin da suka gabata: yanki na walƙiya ko LPZ.
Mene ne tsari na kare walƙiya kuma me yasa hakan yake?
Tunanin kariya ta walƙiya ya samo asali kuma an bayyana shi a cikin ma'aunin IEC 62305-4 wanda shine matsayin duniya game da kariyar walƙiya. Manufar LPZ ta samo asali ne daga ra'ayin rage ƙarfin walƙiya zuwa matakin aminci don kar ya haifar da lalacewar na'urar mashin.
Bari mu ga wani hoto na asali.
To, menene ma'anar kariya ta walƙiya tana nufin?
LPZ 0A: Yankin yanki ba shi da kariya ba a wajen ginin kuma ana fuskantar yajin aiki kai tsaye. A cikin LPZ 0A, babu wata kariya daga tsangwama ta hanyar wutan lantarki yana jawo LEMP (Hasken Wutar Lantarki).
LPZ 0B: Kamar LPZ 0A, shi ma a waje da ginin amma LPZ 0B ana kiyaye shi ta hanyar tsawawar walƙiya ta waje, ko da yaushe a cikin kariya ta yankin walƙiya. Bugu da ƙari, babu kariya ga LEMP ma.
LPZ 1: Yanki a cikin ginin. A wannan yankin, akwai yiwuwar akwai walƙiya na yanzu. Amma yanayin walƙiya yana da ƙasa ƙwarai kamar yadda akalla rabinsa ana gudanar da shi zuwa ƙasa ta hanyar tsarin walƙiya ta waje. Tsakanin LPZ0B da LPZ1, ya kamata a yi Class 1 / Type 1 SPD don kare kayan da ke ƙasa.
LPZ2: Har ila yau, yankin Yanki a cikin ginin inda zazzagewa mai zurfi ne. Tsakanin LPZ2 da LPZ1, ya kamata Class 2 / Type2 ya kare nau'in kariya.
LPZ3: Kamar LPZ1 & 2, LPZ3 shima yanki ne a cikin ginin inda babu ƙaramar igiyar ruwa.