B TH NGHIM V DNG CHY 1. ni dung thc hnh : 1.1 thc hnh v rle mc nc: bi thc hnh ny gm c nhng thit b +R le mc nc v cc u in cc E1,E2,E3

_ngun vo r le chn 5,6 in p 220 VAC _cc cp tip im thng m chn 2,3 thng ng chn 2,4 _3 chn in cc E1,E2,E3 chn 7,8,1 (3 chn ny trong b nc v c ni vi cc chn ca r le) +my bm nc

+contactor

1.2 s mch in :220 VAC

RM

RM1

K

K

K1 7E1 E2 E3

8

M_khi mc nc trong b cha mc thp nht (mc E3) tp im RM1 ca r le mc nc RM ng, cun ht ca contactor K c in ,ng thi cp in cho my bm M bm nc vo b cha _khi mc nc trong b cha mc cao nht (mc E1,lc ny mc nc chm vo c 3 im cc E1,E2,E3) tip im RM1 ca r le mc nc RM m ra ,ngt in cun ht contactor K,ng thi ngt in my bm dng bm nc vo b

2.1. thc hnh v cm bin p sut : bi thc hnh ny gm nhng thit b +b iu khin s DC1020

_ngun vo b iu khin : t 100~240(tn s 50~60HZ)VAC chn 1,2 _u ra relay tip im thng m chn 10,8 tip im thng ng chn 10,9 _u vo ca b iu khin s DC 1020 chn 17,18,19 20 (cc chn ny c kt ni vi cm bin p sut ) tn hiu u vo t cm bin p sut y l tn hiu dng in _trong qu trnh ci t cc gi tri c hin thi trn thanh PV,SP ca b iu khin +cm bin p sut :

_ngun vo :in p 1 chiu 24VDC (c lp trn ng nc v pha trc van kha nc) + my bm nc +contactor

2.2 s mch in :

APTOMAT

DC

AL1

K

K

K

M

_trong qa trnh hot ng, khi vn van nc ( u ra cm bin p sut) lm p sut trong thanh ng tng ln,cc u bo kt ni vi b iu khin s bo tn hiu v.nu p sut ln hn p sut ci t trong b iu khin,n AL1 sng ,tip im m ra ngt in contactor K v ngt in my bm,h thng ngng hot ng cho n khi p sut trong thnh ng nh hn p sut ci t.

+cc chn kt ni gia b iu khin va cm bin p sut220 V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 3 24VDC _ +

DC 1020

Cm bin p sut

2.3 ci t b iu khin DC 1020 : _cc phm chc nng : ln, xung ,bn tri dung thay i cc gi tr trong qu trnh ci t _ban u khi led AT sng(mu vng) dng phm di chuyn chn YES (ng t ng d tm c tnh ca gi tr u vo) Sau khi hon tt cc tham s s t ng c lu vo b nh _sau n v gi (khong 7 giy) phm SET ci t, dng phm di chuyn chn AL1 ci t p sut, dng phm di chuyn ln xung thay i thng s ci t _sau khi ci t song gi phm SET lu vo b nh

3.1 thc hnh v dng chy: bi thc hnh ny gm nhng thit b +b iu khin s DC1020 :tng t nh thc hnh v p sut + Cm bin lu lng:

_ngun vo: 24VDC chn 3,4 +S mch in:

220 VAC

APTOMAT

DC

AL

K

K

K

M_trong qa trnh hot ng, khi vn van nc m dn n ln nht ( u vo cm bin lu lng) lm lu lng dng chy trong thnh ng tng ln,cc u bo kt ni vi b iu khin s bo tn hiu v.nu lu lng ln hn lu lng ci t trong b iu khin,n AL sng ,tip im m ra ngt in contactor K v ngt in my bm,h thng ngng hot ng cho n khi lu lng trong thnh ng nh hn lu lng ci t.

+ Cc chn ni gia b iu khin v cm bin

++1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3 4 24VDC _ +

220 V

3.2 ci t cho b iu khin: _cc phm chc nng : ln, xung ,bn tri dung thay i cc gi tr trong qu trnh ci t _ban u khi led AT sng(mu vng) dng phm di chuyn chn YES (ng t ng d tm c tnh ca gi tr u vo) Sau khi hon tt cc tham s s t ng c lu vo b nh _sau n v gi (khong 7 giy) phm SET ci t, dng phm di chuyn chn AL1 ci t p sut, dng phm di chuyn ln xung thay i thng s ci t _sau khi ci t song gi phm SET lu vo b nh