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(shí)際檢測值進(jìn)行PID運(yùn)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(shí)，一臺泵在變頻器的控制下穩(wěn)定運(yùn)行；當(dāng)用水量大到變頻器全速運(yùn)行也不能保證管網(wǎng)的壓力穩(wěn)定時(shí)，控制器的壓力下限信號與變頻器的高速信號同時(shí)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(yùn)行，以保持壓力的連續(xù)性，同時(shí)將一臺備用的泵用變頻器起動后投入運(yùn)行，以加大管網(wǎng)的供水量，保證壓力穩(wěn)定。若兩臺泵運(yùn)轉(zhuǎn)仍，則依次將變頻工作狀態(tài)下的泵投入到工頻運(yùn)行，而將另一臺備用泵投入變頻運(yùn)行。當(dāng)用水量減少時(shí)，首先表現(xiàn)為變頻器已工作在最低速信號有效，這時(shí)壓力上限信號如仍出現(xiàn)，PLC首先將工頻運(yùn)行的泵停掉，以減少供水量。當(dāng)上述兩個信號仍存在時(shí)，PLC再停掉一臺工頻運(yùn)行的電機(jī)，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(jī)累計(jì)運(yùn)行時(shí)間可顯示，24小時(shí)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(yùn)行時(shí)間，確保了泵的可靠壽命Motor H-100CC4-Ga06b-6047-h002, a20b-0009-0320/10d
509-DOA
OEMC - 8MB
HURCO 415-0193-003A 414-0193-002A
HURCO 415-0193-003b
bn634a218g52, mc611/mc611e
1024 02s12-03
503-E04-262M
TL-C-2
30011, PSC-3
Shibaura 8D02 PC Board H034264
Shibaura 8SCU PC Board H072876
DSP-873, 344-66673C, ASSY 344-66713
Cincinnati PC Platine 3 542 1135a
68E3121873
Pilz PNOZ xv2.1p
Typ # ADV 9424
20-MU PC Board, Mod # 4202879
2212B-A018ABD-1-7EB42-24J-37-98-850GMD
44A294506-G01 , 44A296356-001
HC1-XD-50X200-FA
7007CGD2/GNP4
c41e-0701ag300
852475 apm4, 5a, 811080 E
3-E98380A
Omron CJ1W-V600C12 CJ1WV600C12
462018.1916.01, 462018.7600.51
140DAO84000
109-0852-3a09-08, 109-0852-3b09-08
FEC-FC30-CHI, PM974201-200143 H00-S1.03
Wei?e Sundstrand 128 in-G Modul PC Board, 65000778
44A294501-G0, SUP3, 44B294156-003
fr05cm52ac
RP236B, MEC-37AV-0
E61160
6315327002, 6840040185/b
CRA1FSH50-100
BN634B017G51, MC251/MC251B
Typ # 4-t0113
MA02/1-0059
cz-v21
t750l
mc151a, # bn634a336g52
5012611 B m8028
UF01A, FX10A, BN 624 E 288
TOP-1ME75-2-10MA
UF01A, FX30A
HFC-D-303, 1800
B521078-2
AS-884A-301
LCM-140, 70160-1011
a20b-8002-0130/02a
h23102410123796
A20B-3300-0254/01A
TT-700
h-100bc2m2-g
193-230551-001
93972693
OPE-415
OPE-435
RF0.37/4-7, TF 101
65000777
w1000
qx031a, c1n634a499g52
rp201b, mec-37av-0, 6ri30e-080
e0241-653-179
h-050bc4
h-050bc4f/h-050bc4f-g
a20b-2901-0721/02a
SZ 4155.500
a16b-1200-0370/01a
bn624a550g51
bn624a228b
Mod # AP-13
bk0-nc1145-h02
0267, sfi03-01
rmi03-01
mn-286 j1/0 & mn-286 j2/0
505-T0D-A2E
CHD2HFY40B-300A - F
Mod # 50FB 3P 12
Festo dnc-100-g3/8-sm
a20b-2900-081/a350-2900-t816/02
JANCD-MCP10, DF9202142-C1, REV C11 JANCD-MMM02
Eaton/Moeller STN 1.3 S005
8520-Riom 1, Art.-Nr. 160687
700-rtc20110u1
6403 30 000600 00
44A712776-001, 44A297067-G01
dk-3449
jancv-MRY01B-1 Rev E02, EDF9200676-D0
TTP104
acnl-x2-63x300-fa
GS15007TB4H6DL3
ms4400b, Controller, ms4436b
a20b-3300-0254/02a
a20b-3300-0085/03b
smv-0p-000
Ziatech, ZT 88ct73
11-33-00
Standard Electric AC Motor, # 5669
cpub 03-01-fw SIO 3-02/00
MSE1624Y
60611/61553
Allen Bradley 900037 PC Board, 8000-JB
b521126-5, ab tc-225
CPCR-sd-ca1a-t-a, df8202365
FGSS 300-11
FGSE 300-11
dfm-25-100pa-kf
CMPR-PFD30
r900450964, dr6dp2-53/75ym
PC/16I und MC/16I
CPCR-FR01B Y9
R241A22301
1938000, Bretter 1937862, 1937784
ks100mk4, 897q00768, aq1151pa001b
HD3-2WD-BCA-025A-WYA1
3-531-4043a, 3-533-0145g
A06B-6047-H002 mit A20B-0009-0320/11D
TT-500
Moldavsky 1/2 HP GAP. Compact Gear Box 40:1
Yaskawa JZNC-ITU04 MC-600VDC
A80L-0001-0331, Typ # 072454
JZNC-MTU4-3
180-200-220
Yaskawa CPCR-MR052GC
1.3b-950617t5
50us 3213abf
DEA 70 nfte 458tl, 650
Mod # tm-302z-t4p
Mazak ajv18n
EQ-1756, Serie B, 4291-S12
109-468-3211b
048798-104
TXU-2830, 32URT
850SX Control Rack 3-424-2030A
C484G12.5-3LE
CACR-ir44sfb
HD3-43SGS-BGA-03B-DC-L
CHD2HFY40B-250A
AMI-100S
a02b-0210-c120/ta Fujitsu n860-3755-t001/05a
k25-q-h-1024/k25-q-h-1024-g-r-s-1,2,9
Yaskawa JUSP-ADB04MA
hc74200-1/hc74200-i
021-5232, 021-5232-000B
H0191520
6es7 331-7kb00-0ab0
AE 630, 40207
EP 670, 40210b
635, 40216b
650, 40214a
0271, pri02-01
0271, pri02-00
503-E04-262AM
a16b-2202-0850/02a
4202879 B
Sodick FS-A5C AS-HS-307
415-0176-009h
A20B-0009-0890/03B
3704454
Eri 163-236100, 4y2022
6ep1 931-2ec01
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