HEIDENHAIN ND780 固定式水噴霧系統(tǒng)維護(hù)工作量大,日常維護(hù)費(fèi)用高。
3.2 HEIDENHAIN ND780排油注氮滅火系統(tǒng)排油注氮系統(tǒng)的滅火機(jī)理當(dāng)變壓器內(nèi)部發(fā)乍故障冰鍆內(nèi)部產(chǎn)生大量可燃?xì)怏w另起氣體繼電器動(dòng)作閉合觸點(diǎn),使斷路器跳閘此時(shí)若變壓器汕鍆吒力繼續(xù)增大,超過壓力釋放和壓力擰制器設(shè)定值,則啟動(dòng)防火滅火程序,打開排油閥排油卸壓,防止變壓器爆炸起火同時(shí),斷流閥動(dòng)作,自動(dòng)切斷油枕到變壓器箱體的補(bǔ)油油路,杜絕高位油枕的火上澆油。排油38后,氮?dú)鈴淖儔浩飨潴w底部注氮注,攪拌變壓器汕,強(qiáng)制冷卻故障點(diǎn)及油溫,并形成氮?dú)獗Wo(hù)層,隔絕氧氣的進(jìn)入與固定式水噴霧滅火系統(tǒng)比較,排油注氮滅火系統(tǒng)有以下幾個(gè)特點(diǎn)發(fā)卞火災(zāi)以17起到滅火作用,而。能在主變壓器發(fā)生設(shè)備內(nèi)部故障而未引起火災(zāi)之前,即能進(jìn)行排油注氮,首先排掉油箱內(nèi)部部分變壓器油,以釋放汕吒,這詁施若在變吒器爆炸之前,則不僅火災(zāi)事先防止,而且變壓器在排油注氮滅火之HEIDENHAIN ND780后,尚能修夂,率菇小T詒淅制骰鷦質(zhì)鹿手挾變壓器內(nèi)部故障引起的了分以因此排油注氮滅火系統(tǒng)足以顯小1優(yōu)越性在火災(zāi)報(bào)控制器處廠手動(dòng)狀態(tài)下。只要運(yùn)行人員不誤操作,排油陶氮?dú)忾y沒有泄漏現(xiàn)象,不致起變吒器跳閘,即不會(huì)引起排油注氮滅火誤動(dòng)作若在自動(dòng)狀態(tài)下,即使排油注氮滅火系統(tǒng)發(fā)生誤動(dòng)作,也+致4起變壓器線圈或線圈絕緣損傷,較之固定式水噴霧系統(tǒng)有更大的優(yōu)越
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HEIDENHAIN RETROKIT ND780 DRO PACKAGE for 14" x 40"
LATHE - NEW DIGITAL READOUT
Metaster MT101 K NEU von Heidenhain
Heidenhain ROD 271 - 18000x5 IdNr. 223 047-22
Heidenhain Scale LS 703 id 216 750 24 ML 2240mm
LS703 21675024
REPAIRED HEIDENHAIN LS176 LS 176 2240mm 295 710 4X
LINEAR ENCODER GLASS SCALE
HEIDENHAIN RCN 223F 16384 03S17-0D FANUC02 ANGLE
ENCODER (ID 533 117-06) *NEW*
Heidenhain BF 150 Id.Nr.353 522-04
NEW LC 182 Heidenhain Glass Scale 5 μm 940mm
368563-08
Heidenhain EQN1325.049-2048 EnDat01 ID 655251-03 EQN
1325 Motor Feedback Dubai
USED HEIDENHAIN EXE 922,28480720 INTERPOLATOR
DIGITIZING ENCODER CONTROLLER FE
USED HEIDENHAIN EXE 922,284 807 20 INTERPOLATOR
DIGITIZING CONTROLLER CACLE FE
USED HEIDENHAIN EXE 932,28480740 INTERPOLATOR
DIGITIZING ENCODER CONTROLLER FE
Heidenhain ROD 780 (ROD780) Winkelmessgert
(Drehgeber)
Heidenhain EXE 932 284 807-40 EXE932
Bosch CL300 SPS Digital Baugruppe 107005324-103
Allen-Bradley SPS High Speed Counter 1756-HSC/A NEU
Zebotronics Stepper Drive SE 1000.08.60 8A 60V
Fanuc Tape Reader A13B-0073-B001 A0111
Advantech PC-LabCard PCI-1612B 4port RS-232/422/485
Siemens Sinumerik Sirotec 6FX1120-7BB01
Fanuc Memory Board A20B-0008-0480 / 03A
Siemens Simatic S5 6ES5453-4UA12 6ES5-453-4UA12 NEU V.0
Siemens Simatic S5 6ES5453-4UA11 6ES5-453-4UA11 NEU V.0
Siemens Sinamics Terminal Module TM31 6SL3055-0AA00-3?A
Indramat Rack MT-CNC 02/0009-02 Power Supply
DANFOSS VLT 6000 HVAC VLT 6002 175Z7004 2,2kVA / 1,5
Siemens Simatic S5 6ES5951-7LB13 6ES5-951-7LB13 NEU OVP
Siemens Simatic S5 6ES5951-7LB14 6ES5-951-7LB14 NEU OVP