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變頻調(diào)可平滑調(diào)速,調(diào)速范圍寬和節(jié)能等優(yōu)點(diǎn)在提升機(jī)上得到了廣泛的應(yīng)用,礦井提升機(jī)一般對(duì)變頻器有以下要求:
1.礦用電網(wǎng)波動(dòng)較大,變頻器在380V±20%能正常工作。
2.運(yùn)行平穩(wěn),加減速平滑,S型曲線加速段,在加減速過程中可做到加速度連續(xù),無撞擊感。
3.對(duì)回饋能量的處理方法:回饋制動(dòng)或能耗制動(dòng)。
4.變頻器在整個(gè)工作過程中提供所需要的力矩特性:
啟動(dòng)力矩大于2倍額定轉(zhuǎn)矩,尤其是當(dāng)?shù)V車停在井筒中間時(shí),啟動(dòng)轉(zhuǎn)矩比額定轉(zhuǎn)矩大得多。低頻轉(zhuǎn)矩在3Hz時(shí)大于1.6倍額定轉(zhuǎn)矩。
CUTLER HAMMER D120PM33 TIMER GOOD TAKEOUT
CUTLER HAMMER D120PM33 TIMER GOOD TAKEOUT
Cutler Hammer D120PM33 Timer Module 300 Seconds ! NEW !
Cutler Hammer D120PM33 Timer Module 300 Seconds ! NEW !
CUTLER HAMMER D120PM33 USPP D120PM33
CUTLER HAMMER D120PM33 USPP D120PM33
CUTLER HAMMER D120PM8 CONTROL MODULE GOOD TAKEOUT
CUTLER HAMMER D120PM8 CONTROL MODULE GOOD TAKEOUT
CUTLER HAMMER D120PS1 6V POWER SUPPLY MODULE ***XLNT***
CUTLER HAMMER D23MB TYPE M RELAY 110/120V COIL USED CONDITION
CUTLER HAMMER D23MB TYPE M RELAY 110/120V COIL USED CONDITION
CUTLER HAMMER D87XDL30 0.3-30SEC TIMER RELAY 24-120V-AC 10A AMP B333682
Cutler Hammer DPDT 120VAC Relay D2PR2A
Cutler Hammer DPDT 120VAC Relay D2PR2A
Cutler Hammer NET
Cutler Hammer NET
CUTLER HAMMER RELAY TYPE M, D26MR80A, 8 POLE REVERSIBLE CONTACTS,120VAC COIL
CUTLER HAMMER WPBFV1 MCC CONTROL MODULE STYLE # 9996D10 110-120 VAC 50/60 HZ
CUTLER-HAMMER 9-1887-1 Citation Coil Kit 120V (D3)
CUTLER-HAMMER 9-1887-1 Citation Coil Kit 120V (D3)
CUTLER-HAMMER CH32L150D 1 Phase Loadcenter 150AMP, MAIN LUG; 120/240V
CUTLER-HAMMER CH32L150D 1 Phase Loadcenter 150AMP, MAIN LUG; 120/240V
Cutler-Hammer D120PM20
Cutler-Hammer D120PM20
Cutler-Hammer D120PM30
Cutler-Hammer D120PM30
Cutler-Hammer D120PM30
Cutler-Hammer D120PM33
Cutler-Hammer D120PM33
Cutler-Hammer D120PM33
Cutler-Hammer D120PM33
Cutler-Hammer D120PM34
Cutler-Hammer D120PM34
Cutler-Hammer D120PM34
Cutler-Hammer D120PM34
Cutler-Hammer D120PM8
Cutler-Hammer D120PM8
Cutler-Hammer D26MB Relay Type M 120 Volt Coil VGC!!! Free Shipping
CUTLER-HAMMER D26MPR 120V *NEW OUT OF A BOX*
CUTLER-HAMMER D26MPR 120V *NEW OUT OF A BOX*
CUTLER-HAMMER D7PR24A ICECUBE RELAY DPDT 120V NEW
Cutler-Hammer D80ND1A Pneumatic Timer 110-120V, 50/60Hz, Type PN, Off Delay
Cutler-Hammer D80ND1A Pneumatic Timer 110-120V, 50/60Hz, Type PN, Off Delay
Cutler-Hammer Full Voltage AC/DC Lite Unit - E22D120
Cutler-Hammer Full Voltage AC/DC Lite Unit - E22D120
CUTLER-HAMMER PM32R/ D120PM32R DIGITAL TIMER CIRCUIT BOARD *USED*
CUTLER-HAMMER PM32R/ D120PM32R DIGITAL TIMER CIRCUIT BOARD *USED*
CUTLER-HAMMER TYPE R REED RELAY D40RBA D40RB 240V 120V COIL SER A1 NIB
CUTLER-HAMMER TYPE R REED RELAY D40RBA D40RB 240V 120V COIL SER A1 NIB
CWT S2A5017 Horizontal Slide w/ Pacific Scientific E31NRHB-LNN-NS-00 Step Motor
16、有一天,公雞掉進(jìn)了水里,大聲呼救,正在河里戲水的鴨子立刻游向它,大喊:“快把你的手給我?!惫u說:“不行,這樣會(huì)拉掉我漂亮的羽毛的,我是鐵公雞一毛不拔?!本瓦@樣公雞終淹死在河里。
17、 一壁虎誤入鱷魚池,喪命之時(shí),壁虎急中生智,一把抱住鱷魚大叫:“媽媽!”鱷魚一愣,立刻老淚縱橫:“,都瘦成這樣了,別再上班了!放假休息下吧?!?
18、我在馬路邊撿到10塊錢,把它交到網(wǎng)管帥哥手里面,帥哥拿著錢,對(duì)我把頭點(diǎn),我高興的說了聲,沖個(gè)會(huì)員。
19、很久以前有一個(gè)老漢帶著他孫子出海捕魚,沒想到碰上了海嘯,孫子很擔(dān)心,就對(duì)他爺爺說:“爺爺要刮大風(fēng)了,我們回去吧?!保墒撬麪敔敳淮饝?yīng):“乖孫啊,爺爺什么風(fēng)浪沒見過,一定會(huì)沒事的?!痹捯魟偮?,一個(gè)巨浪打來,把劃船的槳打斷了。于是爺爺說:“乖孫啊,槳完了(講完了)?!?
20、北極熊被大灰狼帶到了一個(gè)炎熱的城市,北極熊說:“這里太熱,我要回北極?!贝蠡依切Φ溃骸拔以缇蜑槟銣?zhǔn)備好了,等一下,把你處理好,你就可以搬進(jìn)這個(gè)冷凍室住,里面的溫度和北極一樣,還有很多的豬豬與你為伴,不會(huì)讓你寂寞?!?