2198-H025-ERS
2198-H025-ERS
廈門莫格電氣自動化有限公司
:祖工
:
:1811245942
:1811245942
地址:廈門市思明區(qū)檳榔西里197號第四層B19單元
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使用空氣,氫氣和水作為發(fā)電機冷卻介質(zhì)的優(yōu)缺點
空氣
其優(yōu)點是:空氣從大氣中取得,制取方便,廉價、簡易,對軸密時要求不高。
缺點是:空氣比重較大,磨擦損失大,導熱散熱能力差??諝馕廴敬?,易使絕緣臟污,風道槽堵塞。且空氣是助燃物,當發(fā)生電流時,易燒毀絕緣;電暈放電時間生臭氧,對絕緣有破壞作用。
氫氣
優(yōu)點是:氫氣的重量僅為空氣的14/1,比重小,通損耗小,流動性強可使效率提高(0.7~1)%,大大提高會熱和散熱能力。與空冷相比,氫冷可提高出力(20~25)%。且氫氣較沌凈,不易氧化,電暈時不產(chǎn)生臭氧,不肋燃。
缺點:需要配置一套復雜的制氫系統(tǒng)和氣體置換系統(tǒng)。另外由于氫氣滲透力強,要求密封性高,所以需要配置一套密封油系統(tǒng),增加發(fā)運行操作和低護修理的工作量。氫氣是易燃物,遇到電流或明火可能著火。當氫氣與空氣混合到一定比例時,遇火即發(fā)爆炸事故,威脅發(fā)電機的安全運行。
水
優(yōu)點:水熱容量大,具有很高的導熱和冷卻能力,其相對導熱能力比空氣大n5倍,比氫氣大40倍。水的化學性能穩(wěn)定,不會燃燒高強度的水有*的絕緣性能。此外,水還制取方便,廉價,調(diào)節(jié)方法間單,冷卻均勻。
缺點:需要一整套復雜的水路系統(tǒng),對水質(zhì)要求高,運行中比較容易腐蝕銅導線和發(fā)氣漏水現(xiàn)象,降低了了電機運行的可靠性。
SQUARE D .350KVA CLASS 9070 INDUSTRIAL CONTROL TRANSFORMER K350D1
I-T-E SN321 VACU-BREAK SAFETY SWITCH, 30 Amp 240 VAC
SQUARE D 3-POLE FUSEHOLDER BASE 40566-028-51
SQUARE D SY MAX CLASS 8030 120VAC OUTPUT MODULE HOM-221
SQUARE D * 200A 240VAC SAFETY SWITCH SER.E1 * H324NDS
SQUARE D * 100A 240VAC 250VDC SER.E1 SAFETY SWITCH * H-223-N
SQUARE D LDG-6CP CLOSING PLATE LOT OF 9 NIB
SQUARE D 3-POLE 400A INSTANTANEOUS TRIP CIRCUIT BREAKER LAP3640036MMTV6?283
SQUARE D 9422TG2 DISCONNECT SWITCH, 400 Amp, NNB
ROD OPERATED, VARIABLE DEPTH, FLANGE MOUNTED
SQUARE D DISCONNECT 600V AC 45A SWITCH 9421-V3 SER. A W / MOUNTING BRACKET
SQUARE D RELAY KFD13V53
SQUARE-D * PRESSURE SWITCH * TYPE GAW-5
SQUARE D 8501 KPD12 GENERAL PURPOSE RELAYS
SQUARE-D * 100A 600VAC SAFETY SWITCH SER.E1 * H363N
SQUARE D HEAVY DURY SAFETY SWITCH 30AMP 600V HU361 SER F1
DAYKIN M2F2F-0105 TRANSFORMER DISCONNECT, 3000 Va 480/120 V 6.9/16.7-8.3 AMP
SQUARE D 600VAC 25A SWITCH CONTROL STATION 9421 V2A30
SQUARE-D * 60A 240VAC SAFETY SWITCH SER.D2 * H322N
SQUARE D SER.2 600VAC 250VDC 40A CIRCUIT BREAKER FHB36040
SQUARE D 3-POLE CIRCUIT BREAKER 800A SENSOR MXL36450 / ARP056, DAMAGED
SQUARE D 230-460/115V LIGHTING TRANSFORMER, SK-5271-A
SQUARE D SY/MAX 120VAC 8030 OUTPUT MODULE SER. F2 ROM 221
SQUARE D 277V 20A SINGLE POLE CIRCUIT BREAKER, EGB14020 LOT OF 2
SQUARE D 3-POLES 120V/60Hz LIGHTING CONTACTOR SER.C 8903 L01200
SQUARE D 20A SINGLE POLE CIRCUIT BREAKER LOT OF 2 QO MG-9459
EMECANIQUE LP1D0910BD CONTACTOR, NIB
SQUARE D 3.0KVA 50/60HZ INDUSTRIAL CONTROL TRANSFORMER K3000D1 SER. A
SQUARE D 10A 600V LIMIT SWITCH 9007C68T10 SER. A *WITHOUT OPERATING HEAD*
SQUARE D 700AMP 3 POLE 600VAC 250VDC CIRCUIT BREAKER MH36700
SQUARE D 15A 3-POLE CIRCUIT BREAKER QOU N-429
SQUARE D GENERAL PURPOSE RELAYS 8501 RS4 SERIES B
SQUARE D 24VDC DeviceNet MODULE 52046-344-53 WITH BASE
SQUARE D SY/MAX MODEL 500 PROCESSOR MODULE 8020 SCP-523 SER. M1
SQUARE D 3-POLE CONTACT KIT CLASS 9998 TYPE QA-81 NIB
SQUARE D RATIO 2620:5 CURRENT TRANSFORMER 120R-000-001
SQUARE D PHASE LOSS MODULE 8660 B-6 SER. A
SQUARE D 6A C60N SUPPLEMENTARY PROTECTOR NIB 34618 / MG24430 / A0247
SQUARE D 9016 GAW-1 100 PSIG INDUSTRIAL VACUUM SWITCH, NIB
SQUARE D 8501 KP12 GENERAL PURPOSE RELAYS
SQUARE D 8501 KP12V20 Series E GENERAL PURPOSE RELAYS
SQUARE D 3-POLE 20A THERMAL MAGNETIC CIRCUIT BREAKER FAL34020
SQUARE D SY/MAX PLC CLASS 8030 OUTPUT MODULE ROM-221 SERIES G