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3HAC025873-001
3HAC025873-001
3HAC025873-001
3HAC025873-001
該系統(tǒng)具有計(jì)算機(jī)的通訊功能，PLC變頻器均提供有RS232或485接口PLC可選用西門子的S7-200計(jì)算機(jī)可以與一套或多套系統(tǒng)進(jìn)行通訊，利用計(jì)算機(jī)同時(shí)可以監(jiān)測：電流、電壓、頻率、轉(zhuǎn)速、壓力等也可以控制變頻器的各類參數(shù)。
此外該系統(tǒng)還具有手動(dòng)/自動(dòng)操作，故障報(bào)警，運(yùn)行狀態(tài)，電流，電壓、頻率狀態(tài)顯示缺水保護(hù)等功能。
4.運(yùn)行特征
以三臺水泵的恒壓供水系統(tǒng)為例，系統(tǒng)在自動(dòng)運(yùn)行方式下，可編程控制器控制變頻器軟啟動(dòng)1#泵，此時(shí)1#泵進(jìn)入變頻運(yùn)行狀態(tài)，其轉(zhuǎn)速逐漸升高，當(dāng)供水量Q<1/3Qmax時(shí)（Qmax為三臺水泵全部工頻運(yùn)行時(shí)的最大流量），可編程控制器CPU根據(jù)根據(jù)供水量的變化自動(dòng)調(diào)節(jié)1#泵的運(yùn)行轉(zhuǎn)速，以保證所需的供水壓力。當(dāng)用水量Q在1/3Qmax當(dāng)外供水量減少至1/3Qmax5.系統(tǒng)經(jīng)濟(jì)效益分析及系統(tǒng)優(yōu)點(diǎn)
5.1經(jīng)濟(jì)效益分析
5.2系統(tǒng)優(yōu)點(diǎn)
5.2.1恒壓供水技術(shù)因采用變頻器改變電動(dòng)機(jī)電源頻率，而達(dá)到調(diào)節(jié)水泵轉(zhuǎn)速改變水泵出口壓力，比靠調(diào)節(jié)閥門的控制水泵出口壓力的方式，具有降低管道阻力大大減少截流損失的效能。
5.2.2由于變量泵工作在變頻工況，在其出口流量小于額定流量時(shí)，泵轉(zhuǎn)速降低，減少了軸承的磨損和發(fā)熱，延長泵和電動(dòng)機(jī)的機(jī)械使用壽命。
5.2.3因?qū)崿F(xiàn)恒壓自動(dòng)控制，不需要操作人員頻繁操作，降低了人員的勞動(dòng)強(qiáng)度，節(jié)省了人力。
5.2.4水泵電動(dòng)機(jī)采用軟啟動(dòng)方式，按設(shè)定的加速時(shí)間加速，避免電動(dòng)機(jī)啟動(dòng)時(shí)的電流沖擊，對電網(wǎng)電壓造成波動(dòng)的影響，同時(shí)也避免了電動(dòng)機(jī)突然加速造成泵系統(tǒng)的喘振。
5.2.5由于變量泵工作在變頻工作狀態(tài)，在其運(yùn)行過程中其轉(zhuǎn)速是由外供水量決定的，故系統(tǒng)在運(yùn)行過程中可節(jié)約可觀的電能，其經(jīng)濟(jì)效益是十分明顯的。由于其節(jié)電效果明顯，所以系統(tǒng)具有收回投資快，而長期受益，其產(chǎn)生的社會效益也是非常巨大。
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FIREYE MEIR4 IR AMPLIFIER
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FIREYE FLAME MONITOR PROGRAMMER MODULE EP380
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Returns: Accepted within 3 days
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1953 Fireye - Fire, Biscuits Ames, Massachusetts - AD
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FIREYE 4-314 NSFP 4314
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FIREYE 4-314 NSPP 4314
FIREYE EP381 NSFP EP381
FIREYE E100 USPP E100
FIREYE EP160 PROGRAMMER MODULE
FIREYE 8-302 USPP 8302Location: USA
Returns: Not accepted
FIREYE 9726 0021
FIREYE E1R1 INFARED AUTO CHECK AMPLIFIER MODULE NEW
Fireye Programmer Module MP230 ! NIB !
FIREYE 70D40
FIREYE E1R1 INFRARED AUTO CHECK AMPLIFIER MODULE NEW
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Fireye 65UV5-1000 Integrated Flame Scanner
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Fireye Type 25RU8 Model 4580 Flame Safeguard
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Fireye Flame Safeguard Type 29RF5 Model 1001
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Fireye 45UV5-1000 (45UV51000) U.V. Flame Scanner
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FIRESTONE AUDIO FIREYE 2 HEADPHONE AMPLIFIER/DAC.
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