恒壓供水系統(tǒng) 全自動恒壓供水控制原理 當(dāng)主水管網(wǎng)壓力傳感器的壓力信號4~20mA送給數(shù)字PID控制器，控制器根據(jù)壓力設(shè)定值與實際檢測值進(jìn)行PID運算，并給出信號直接控制變頻器的轉(zhuǎn)速以使管網(wǎng)的壓力穩(wěn)定。當(dāng)用水量不是很大時，一臺泵在變頻器的控制下穩(wěn)定運行；當(dāng)用水量大到變頻器全速運行也不能保證管網(wǎng)的壓力穩(wěn)定時，控制器的壓力下限信號與變頻器的高速信號同時被PLC檢測到，PLC自動將原工作在變頻狀態(tài)下的泵，投入到工頻運行，以保持壓力的連續(xù)性，同時將一臺備用的泵用變頻器起動后投入運行，以加大管網(wǎng)的供水量，保證壓力穩(wěn)定。若兩臺泵運轉(zhuǎn)仍，則依次將變頻工作狀態(tài)下的泵投入到工頻運行，而將另一臺備用泵投入變頻運行。當(dāng)用水量減少時，首先表現(xiàn)為變頻器已工作在最低速信號有效，這時壓力上限信號如仍出現(xiàn)，PLC首先將工頻運行的泵停掉，以減少供水量。當(dāng)上述兩個信號仍存在時，PLC再停掉一臺工頻運行的電機，直到最后一臺泵用主頻器恒壓供水[4]。另外，控制系統(tǒng)設(shè)兩臺泵為一組，每臺泵的電機累計運行時間可顯示，24小時輪換一次，既保證供水系統(tǒng)有備用泵，又保證系統(tǒng)的泵有相同的運行時間，確保了泵的可靠壽命1000-nx103 1000NX104
BKO-NC6851 H04
1398-sr9p
54 15c110/0p 4-80, 0-64
440f-c28013
e2530-254-032
Art # JUSP-ra05
se303a
ic600cb515n
VT130G204035, VT3B-2114
VT130G204035, VT3B-2114A
mtc02-00, fwa-mt*cnc-004-15vrs-nn
MT-CNC 02/0015 -03, FWA-MT*CNC-004-13VRS
mtc02-00, MT-CNC 04.13/05
MT-CNC 02/0011 -04
MT-CNC 02/0029 -04
MT-CNC 02/0029 -03
6219ddu av2s
romarsh transformer tx405/1
05-09-40-02/a, fax-50
1494f
A20B-1003-0340/05C
3-531-3650a, 3 533 0040g
6es7154-2aa01-0ab0 mit 6es7194-4ad00-0aa0
Saftronics Platine # b1125-1, aa1125
HURCO bmc-30/m
BY171A412G51/D
Seiki 06-00-02 HC400
pcb-s212-000, REV b1, as-212p-020
Typ by171a412g51/C
A20B-0007-0151/07A
109-525-2237b-9
900066 8000-EJA
A80L00100015-01
pa63210-0080
2ANU14A14AC
hke011-100a05, LS 061260
hke011-100a05-045326
a16b-1310-0300/03a
SL1-AK2
MNB 0.2-17
6231c-213-pm-591da
HD361SN
2000304L-B
as-s058-000
HP100-T1-CN03
bmoa-amp-f-ns-c2
A20B-2900-0811/02A
bn634b824g52
hr371/hr371b PC Board, bn634b824g52a
B106B E 100 988
a20b-2902-0302/02a
pe01441010
a20b-0003-0744/13f
k-s-dsg-01-2b2-d24-40
06-02-fw, IBM 1-04/00, SLM 2-03/03
cpub 06-02-fw, IBM 1-04/00, SLM 2-02/01
Kearney and Trecker 1-2197900
3RS1041-1GW50
FANUC PC BOARD, a20b-1000-0550/12e
6j62/eg24n9k33l
nzm6b 63, zm6a-60-800, 60a
b-83124ja-2/01
4we 6 j62/eg24n9k4
S/N 66610
TV 168
R-30iA
500FL-DOD93
MRS0428
109-525-2250b-1
twh-70s-277-sf-dgc
FCA535MWY
tek-4191
bn624a551g51, fx61c
44A294526-G01
1-2129200
CBC3MAU19AC 9.000
mt88-2542, 1 PH, 230-460/85 -110
1-21295-01
SGR-G02-1-10
Allen Bradley 1398-sr9p
Allen Bradley 1398-sr9p, Ser d1
1GN50-580
C484G7.5-3LE
pb-038
Typ ht-45c
FANUC Transformer A80L-0001-0164
vm24-Sockel, vm24s, UMK-SE 11.25-1
fx231/fx231d-s, bn624a550g52a
TDC-2A, QA-624
stb-b32.pcb, NR 5042453b
big daishowa seiki pc board, nzero, 8707
M003459712, 74102-405-53
pn5201 Drucksensor 0-3625
a20b-0009-0770/01a, a350-0009-t772/01
S/N 365780
gut 7040
410100-0450
426.2000 - 1024
8548560, 8835049, 8141540
rifb - 02-g, by172b114g51
se-161-x CS
b43455-s5208-t2
109-490-4285b-1
G9B00021, T3891
se-161
GE Fanuc IC647WMI920 44A730327-G01
e4809-770-112-a
MELDAS-YM2
626MT II, # JPAC-C071
# 1-21285
mm8800/xx
A20B-2100-0120/02A
Type # T-1
pk564bn-tg7.2a3
PRM3 PP07K
2755-DS4A
LX2-01R & LX2-01T
A860-0304-T011
a06b-6047-h001
se-176
General Electric 44A294529-G01 Board, APA1, 44B295308-001
99340465, 99340473, s/w 89994R02
Northman Druckschalter, ps-35
125, 105-212
1000-nx103
A20B-2900-0482/01A
44A719314-G01 002/3, 44A719201-001
kso-g02-2ba-20/ks-g02-2ba-20
60gj03, 600vac
KRF2-1000
CDA2F40-50 - F 5 2-SMC D-F5BA
CRA1BW50-190C
SMD6 30F30
3rk1300-1hs01-0aa0
IBM 1-03/00, SLM 2-02/01
ds121, 626b100g04
152/010-500-180sz825
nf-s-413075/11-80
e3900-596-007
3rk1300-0ks01-0aa0
pe-1002-05
cvx-0260b-n
C-8335-1110D
HD51C B/HD-51CB
075TG4P-GR4, TOP-1ME75-2-10MA
2e-24p
GT-20601
GE Trafo, 9T58B3357
a16b-1810-0010/02a
HD3-42SG-KcP-03B-DC-L
dfm-32-100pa-gf
modicon 3 position servo boden, 110-131
a20b-2902-0290/16c
6dp2-50/210ym
mgse 75-12a
p4130b-2
M52
HURCO BMC 4020HT
Typ # 6.0
TM12, D-73461
A16B-0160-0543/30G
03.25 SB2AUS19C
1208 1210 1212
b-63005en/01
BFCI-z3
8121190
vt130g204035, vt3b-0101b
18d-1-30
1ZK71B2
SJ 555106-1
987-7-36
A16B-2200-0853/05B
he-d-mini/lfr-d-7-5m - midi-a-sa/lf-1/8-meh-hgl-sa
XCG-03-F-10
AS-H827-107
JEC-204, Typ HT-30C
m325my-v, mc021c, bn624e859g52
30222, PSC-3
IFM efector pn7003 Drucksensor 0-363
Monarch Board, 50303
6728-042.244639
6-07-004-010
PCB 11d704
f-66wn2
233900, pse4-sc-01
7610015
AA1124
958287-01
rmg12.2-nn
25TP305
LZ60-C
DS2100-1010
2212 ETN9/C3
ETK000720
836T-T351JX28
a860-0300-t002 2500
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