Amaliy mashg’ulot №1 elektr ta’minoti tizimida elektr energiyasi nazorati va hisobining avtomatlashtirilgan tizimlari (eenxat) tushunchasi va texnik vositalari

1.2 MАSАLАLАRNI YECHISH UCHUN MISОLLАR
1-Misol. AAshv-3*25 markali liniya uchun tok transformatorini tanlang?
I_ntt ≥ I_rux
Liniya uchun ruxsat etilgan tok I_rux=115 A bo‘lgani uchun I_ntt=150 A tok transformatorini tanlaymiz.
U holda, .

2-Misol. TNHDS-10000/110/35 transformator uchun tok transformatori tanlash.
Kuch transformatorining yuqori va past kuchlanish tomondagi nominal toklarini hisoblashdan boshlanadi:

A

A
TT larning birlamchi nominal toklari quyidagi shartlarga javob berishi kerak:

demak,

demak,
Yuqori va past tomondagi TT larni transformatsiyalash koeffitsienti quyidagiga teng:




1.3 MUSTАQIL YECHISH UCHUN MISОLLАR.

1-Misol. AAshv-3*50 markali liniya uchun tok transformatorini tanlang?

2-Misol. TNHDS-25000/110/35 transformator uchun tok transformatori tanlash.
3-Misol. AC-120 markali liniya uchun tok transformatorini tanlang?
4-Misol. TNHDS-6300/35/10 transformator uchun tok transformatori tanlash.
5-Misol. AAshv-3*70 markali liniya uchun tok transformatorini tanlang?
6-Misol. TNHDS-1600/35/6 transformator uchun tok transformatori tanlash.