Huong Dan Ve Dien

Mc lc

Bin son: GV. Thin Khng Tung

Mc lc2.3.Bi tp thc hnh.....................................................................................................5CHNG 2: CC K HIU QUY C DNG TRONG BN V IN......................6

f.Bi tp thc hnh......................................................................................................40 g.Bi tp thc hnh......................................................................................................57

Bi ging V in

Bin son: GV.Thin Khng Tung

CHNG 1: KHI NIM CHUNG V BN V IN1. Quy c trnh by bn v 1.1. Vt liu dng c v Giy v : c 3 loi giy: giy v tinh, giy bng m, giy k li hp Bt ch: c nhiu loi khc nhau, ty theo yu cu m chn loi bt ch cho thch H: loi cng: 1H, 2H, 3H, 4H,..9H HB: loi trung bnh B: loi mm 1B, 2B, .9B Thc v: thc dp di 30- 40 cm, thc rp trn, thc hnh ch T, thc ke

1.2. Kh giyK hiu giy kh Ky hieu kho giay 44 1189841 24 22 12 297420 11 297210

Kch thc cc Kch thc cac cnh ca kh canh cua kho giy(mm) giay(mm) K hiu ca t Ky hieu cua giy tng ng t giay tng ng

594841 594420

A0

A1

A2

A3

A4

Quan h gia cc kh giy nh sau:

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Bi ging V in


1.3. Khung tnKhung tn t gc phi bn v

i vi bn v dng giy A2, A3, A4

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Bi ging V in


i vi bn v dng giy A0, A1

1.4. Ch vit trong bn v C th vit ng hoc vit nghing 750 Chiu cao kh ch: h= 14, 10, 7, 3.5, 2.5 (mm) Chiu cao cc loi ch: Ch hoa = h Ch thng c nt s (h, g, l) =h Ch thng khng c nt s (a, e, m) =5/7h Chiu rng: Ch hoa v s= 5/7h, ngoi tr A,M = 6/7h, s 1=2/7h, w=8/7h, l= 4/7h, J, I= 2/7h Ch thng = 4/7h, ngoi tr w, m=h, f,j,l,t= 2/7h, r=3/7h B dy nt ch, s= 1/7h

1.5. ng nt

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Bi ging V inTn gi 1. Nt lin m Hnh dng

Bin son: GV.Thin Khng Tung ng dng - Cnh thy ng bao thy - ng nh ren thy - Khung bng tn, khung tn

2. Nt lin mnh

- ng ng, ng dn, ng kch thc - ng bao mt ct chp - ng gch gch trn mt ct - ng chn ren thy

3. Nt t 4. Nt gch chm mnh 5. Nt ln sng

- Cnh khut, ng bao khut - Trc i xng - ng tm ca vng trn - ng ct la hnh biu din

- ng phn cch gia hnh ct v hnh chiu khikhng dng trc i xng lm trc phn cch 1.6. Cch ghi kch thc - ng dng ( ng ni): V nt lin mnh v vung gc vi ng bao - ng ghi kch thc: V bng nt mnh song song vi ng bao v cch ng bao t 7-10mm - Mi tn: nm trn ng ghi kch thc, u mi tn va chm st vo ng ging , mi tn phi nhn v thon - Ngyn tc ghi kch thc: nguyn tc chung, s ghi ln khng ph thuc ln ca hnh v, n v thng nht l mm ( khng cn ghi n v trn bn v), n v gc l Cch ghi kch thc: Trn bn v: kch thc ch c php ghi 1 ln i vi bn v c hnh nh, thiu ch ghi kch thc cho php ko di ng ghi kch thc, con s kch thc ghi bn phi, mi tn c th ghi bn ngoi - Con s kch thc: Ghi dc theo ng kch thc v khong gia v cch mt on khon 1.5mm - Hng vit s kch thc ph thuc vo nhing ng ghi kch thc, i vi cc gc c th nm ngang - ghi kch thc mt gc hay mt cung, ng ghi kch thc l mt cung trn

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Bi ging V in


- ng trn trc con s kch thc c ghi - Cung trn trc con s kch thc c ghi R 1.7. T l bn v

- T l thu nh: 1/2, 1/3,.1/100, - T l nguyn: 1/1- T l phng to: 2/1, 3/1,. 100/1,.. 1.8. Cch gp bn v - Cc bn v thc hin xong, cn phi gp li a vo tp h s lu tr thun tin trong vic qun l v s dng - Cch gp bn v phi tun theo mt trnh t v ng kch thc cho sn, khi gp phi a khung tn ra ngoi khi s dng khng b lng tng, v khng mt thi thi gian tm kim 2. Cc tiu chun ca bn v in 2.1. Tiu chun Vit Nam Cc k hiu mt bng v trn s in phi c thc hin theo tiu chun Vit Nam: TCVN 1613 75 TCVN 1639 75 v cc k hiu in trn mt bng phi c thc hin theo tiu chun TCVN 185 - 74 2.2. Tiu chun quc t Tiu chun lp t in IEC 2.3. Bi tp thc hnh

Thit lp bn v mt bng cho mt cn h cp 4, bao gm: 1. Chn kh giy. 2. Khung tn. 3. T l bn v. 4. S mt bng.

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Bi ging V in


CHNG 2: CC K HIU QUY C DNG TRONG BN V IN1. V cc k hiu phng c v mt bng xy dng Trn s mt bng cho ta bit v tr lp t cc thit b in cng nh cc thit b khc. V d ta c s mt bng ca mt cn h nh sau:

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Bi ging V in


Hnh 2.1: S mt bng mt cn h Cc k hiu c bn trn s mt bng: STT 1 TN GI Ca ra vo 1 cnh2'-6"

K HIU

2

Ca ra vo 2 cnh5'-0"

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Bi ging V in3 Thang my


4

C a s

2'-6"

5

Cu thang

6

Bn tm

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Bi ging V in


7

Nc

Ngoi ra cn c rt nhiu cc k hiu trn bn v, m chng ta c th tm hiu trong h thng tiu chun Vit Nam (TCVN) v xy dng. 2. V cc k hiu in trong s in chiu sng 2.1. Ngun in STT 1 2 3 4 5 6 7 8 2.2. TN GI Dng in 1 chiu in p mt chiu Dng in xoay chiu hnh sin Dy trung tnh im trung tnh Cc pha ca mng in Dng in xoay chiu 3 pha 4 dy 50Hz, 380V Dng in 1 chiu 2 ng dy Cc loi n in v thit b dng in STT 1 TN GI n hunh quang K HIU N O A, B, C 3+N 2 50Hz, 380V 110V K HIU

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Bi ging V in


2

n nung sng

3

n ng

4

n p trn

5

n pha bng solium 150W treo trn tng. 150 la ch s cng sut, ngoi ra cn c 35, 70W

6

n cng ra vo

7

n trang tr sn vn

8

n chiu sng khn cp

9

n thot him

EXIT

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Bi ging V in1 0 n chm


1 1

Qut thng gi

1 2

iu ha nhit

1 3

Bnh nc nng

1 4

cm n, cm i

2.3. Cc loi thit b ng ct bo v 1 Cu ch

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Bi ging V in2 MCB, MCCB


3 4

T phn phi Cu dao mt pha

5

o in mt pha

6 7

Cng tc n, i, ba, bn Cu dao ba pha

8

o in ba pha

9

Nt nhn thng h

10

Nt nhn thng ng

11

Nt nhn kp

2.4. Cc loi thit b o lng

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Bi ging V in1 Ampemet


2

Vnmet

3

ng h kiliwatt

Cc mch in chiu sng c bn: Mch n nung sng mt cng tc:

S nguyn l

S n tuyn

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Bi ging V inS ni dy


Mch n mt n, mt cng tc v mt cm

S nguyn l

S n tuyn

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Bi ging V inS ni dy


Mch mt n hai cng tc iu khin hai ni

S nguyn l

S n tuyn

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Bi ging V inS ni dy


Ta cng c th mc Mch mt n hai cng tc iu khin hai ni theo s di y:

S nguyn l

S n tuyn

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Bi ging V in


S ni dy Mch mt n iu khin ba ni (mch n hnh lang):

S nguyn l

S n tuyn

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Bi ging V in


S ni dy Mch n sng tt lun phin:

S nguyn l

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Bi ging V inS n tuyn


S ni dy 3. V cc k hiu in trong s in cng nghip Cc kh c in, thit b in ng ct trong cc s phi biu din trng thi ct (trng thi h mch), ngha l khng c dng in trong tt c cc mch v khng c lc ngoi cng bc tc dng ln tip im ng. Nhng ci i ni khng c v tr ct cn phi ly mt trong cc v tr ca n lm gc biu din trong s . Cc tip im ca thit b ng ct c hai v tr gc (v d: rowle c hai v tr), cn phi chn mt trong hai v tr biu din. V tr ny cn c gii thch trn s . Cc tip im ng ca role, ca cc kha in thoi v nhng ci chuyn mch in thoi, nt bm biu din theo phng php phn chia. Nhng tip im ca my ct v nt bm s biu din t trn xung khi biu din cc mch ca s theo chiu ngang, v t tri sang phi khi biu din cc mch theo chiu ng. 3.1. Cc loi my in 1 Cun cm, cun khng khng li Cun cm c li in mi dn t Cun cm c u rt ra

2

3

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Bi ging V in4 Cun in cm c tip xc trt


5

Cun cm bin thin lin tc Cun khng in n

6

7

Cun khng in kp

8

Cun cm tinh chnh c li in mi dn t.

9

Bin p khng li c lin h t khng i

10

Bin p khng li c lin h t thay i

11 dn t

Bin p c li in mi

12

Bin p iu chnh tinh c bng li in mi dn t chung.

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Bi ging V in13 t Bin p mt pha li st


14

Bin p mt pha li st t c mn che gia cc cun dy

15

Bin p mt pha li st t c u rt ra im gia dy qun (bin p vi sai)

16

Bin p mt pha ba dy qun li st t c u rt ra dy qun th pha

17

Bin p ba pha li st t, cc dy qun ni hnh sao sao c im trung tnh rt ra

18

Bin p bap ha li st t, cc dy qun ni hnh sao tam gic c im trung tnh rt ra.

19

Bin p t ngu hai dy qun mt pha li st t

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Bi ging V in20 Bin p t ngu hai dy qun ba pha li st t


21

Bin p t ngu ba dy qun mt pha li st t

22

Bin p li thp c cun dy iu khin, mt pha

23

Bin p li thp c cun dy iu khin, ba pha cun dy ni hnh sao-sao

24

My bin dng c mt dy qun th cp

25

My bin dng c hai dy qun th cp trn mt li

26

My bin dng c hai dy qun th cp trn hai li ring

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Bi ging V in27 28 29 Cun dy cc t ph Cun dy stator (mi pha) ca my in xoay chiu Cun dy kch thch song song, kch thch c lp my in mt chiu Stator, dy qun stator k hiu chung


30

31

Stator dy qun ba pha tam gic

32 ni sao

Stator dy qun ba pha

33

Rotor

34

Rotor c dy qun, vnh i chiu v chi than My in mt chiu kch t c lp

35

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Bi ging V in36 My in mt chiu kch t ni tip


37

My in mt chiu kch t song song

38

My in mt chiu kch t hn hp

39

ng c in mt chiu thun nghch, c hai cun dy kch thch ni tip

3.2. Cc loi thit b ng ct, iu khin 1 Tip im ca cc kh c ng ngt v i ni -Thng m -Thng ng

-i ni

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Bi ging V inCho php s dng cc k hiu sau y: - Thng m - Thng ng


- i ni trung gian Cho php bi en vng trn ch v tip im ng 2 Tip xc trt - Trn mt dn in

- Trn mt s mch dn in kiu vnh trt

3

Tip im ca cng tc t, khi ng t, b ch ng lc: - Thng h

- Thng ng

- i ni

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Bi ging V in4 Tip im thng m ca rowle v cng tc t c tr hot v thi gian - ng chm


- M chm

- ng m chm 5 Tip im thng ng ca r le v cng tc t c tr hon v thi gian - ng chm

- M chm

- ng m chm

V d: mch khi ng sao tam gic Trong o: L1:

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Bi ging V in


Hnh 2.2 : Mch ng lc

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Bi ging V in


Hnh 2.3: mch iu khin

Hnh 2.4: mch quay hai chiu (mch ng lc)

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Bi ging V in


Hnh 2.5: Mch iu khin

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Bi ging V in


Hnh 2.6: mch ng lc hm ng nng ng c ba pha

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Bi ging V in


Hnh 2.7: Mch iu khin 4. V cc k hiu in trong s cung cp in 1 Dao cch li mt cc

4.1. Cc loi thit b ng ct, o lng bo v

2

Dao cch li ba cc

3

Dao ngn mch

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Bi ging V in4 Dao t mch, tc ng mt chiu


5

Dao t mch, tc ng hai chiu

6

My ct h p (Aptomat) k hiu chung

7

My ct h p ba cc

Lu : nu cn ch r my ph thuc i lng no (qu dng, p..) th dng cc k hiu I >, I , U

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