U z g i c h n i n g u z i l g a n h o l a t i d a aj
ra tk ic h la r y o r d a m i d a k u c h l a n i s h ostida
a m a l l a r n i b a j a r i s h q i y m a t i ulangan
q i s m l a r n i n g s i g ' i m i b i l a n belgilangan
z a ry a d to k i z a n j i r i n i o c h i s h b ila n bir
v a q td a s o d i r b o M ad i ( 5 . 5 - r a s m ) . Barcha
k u c h l a n i s h l a r j i h o z l a r i v a y i g ‘ish shi-
n a l a r i n i n g ( k o n d e n s a t o r b a t a r e y a la -
rid a n t a s h q a r i ) z a r y a d t o k l a r i katta
e m a s va, s h u s a b a b l i . u l a r n i ajratkich
lar v o sita sid a u z is h v a u l a s h xavfli emas.
A j r a t k i c h l a r y o r d a m i d a y o y s o 'n d i
ruvchi g 'a l t a k l a r n i t a r m o q d a yerga va
k u ch t r a n s f o r m a t o r l a r i n i n g n ey tralla-
riga u la n ish m a v ju d b o M m a g a n h o l l a r d a h a m d a q i y m a t l a r i
E U T Q d a ko'rsatilgan tr a n s f o r m a t o r va a v t o t r a n s f o r m a t o r l a r n i n g
m agnitlash, kabelli va h av o lin iy a la rin in g z a r y a d t o k l a r i n i u zish va
ulash amallarini bajarishga ruxsat e tila d i.
Ishlatishda ajratkichlarga q u y id a g i t a l a b l a r q o ' y i l a d i :
• nom inal tokda uzoq v aqt i s h l a g a n d a a j r a t k i c h l a r n i n g kontakt
tutashm alari 75°C d a n yuqori h a r o r a t g a c h a q i z i s h i m u m k i n emas;
• kontakt tizimi zaruriy te r m ik va d i n a m i k c h i d a m l i l i k k a ega
boMishi shart;
• qisqa tutash toklari o q q a n d a a j r a t k i c h l a r n i n g p i c h o q l a r i ulan
gan holatda tutib turilishi sh art ( y u r i t m a n i n g q u l f l o v c h i mosla-
masi, m exanik yoki m agnit q u l f y o r d a m i d a ) . U z i l g a n holatdagi
ajratkich qutblarining kontaktlari o ra s id a g i z a r u r i y m a s o f a m ex an ik
tutqich yordam ida ishonchli q ay d e tilis h i s h a r t ;
• ajratkichlarning izolatsiyasi yom gM r, m u z , h a v o n i n g c h an g -
langanligi holatlarida ishonchli ish la sh n i t a ’m i n l a s h i s h a r t . T a y a n c h
izolatorlari va izolatsiyalovchi t o r t m a l a r a m a l l a r n i n g b a jarilish
paytida mexanik y u klam alarni k o 't a r a o lis h i s h a r t ;
• ajratkichlarning asosiy p i c h o q l a r i m e x a n i z m i u z g i c h va za-
minlovchi pichoqlar bilan b lo k ir o v k a g a e g a b o M ish i s h a r t .
BoMgichlar tuzilishi b o 'y ic h a a j r a t k i c h l a r d a n k a m f a r q qiladi.
Ularning kontakt tizimi h am y u k la m a to k i o s t i d a a m a l l a r n i baja
rishga moslanmagan. BoMgichlarning a so s iy v a z if a s i — u h a r ikkala
tomondan uzgichlar yordam ida u z ilg a n id a n s o ‘n g e l e k t r ta rm ogM ning
shikastlangan boMagini tez u z ish d an ib o ra td ir . B o M g ic h la r y o r d a m id a
tran sform atorlarning m a g n itla sh va l i n i y a l a r n i n g z a r y a d toklari
58
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