tdm1.2-050-300-w1-000驅動器
tdm1.2-050-300-w1-000驅動器
tdm1.2-050-300-w1-000驅動器
DL/T596—1996《電力設備預防性試驗規程》規定：“高壓斷路器操動機構分、合閘電磁鐵或合閘接觸器端子上的低動作電壓應在操作電壓額定值30%∼65%之間”。GB50190—91《電氣裝置安裝工程電氣設備交接試驗標準》也規定：“直流或交流的分閘電磁鐵，在其線圈端鈕處測得的電壓大於額定值的65%時，斷路器應可靠分閘；當此電壓小於額定值的30%時，不應分閘”。
某些SF6斷路器的液壓機構的分閘回路是線圈串有電阻，如平開的LW6-500型，110VDC直流操作電源，分閘回路為分閘線圈(18Ω)外串32Ω電阻。一般認為低動作電壓為分閘回路(包括串聯電阻)全電壓，如果低動作電壓為30% Un時，分閘線圈兩端的動作電壓僅為11.88V，顯然難以滿足抗幹擾的需要，有可能出現由於分閘線圈低動作電壓過低，斷路器在強電磁幹擾下“偷跳”現象。據不完全統計，葛洲壩大江電廠開關站10年來開關偷跳累計達17次，在對葛洲壩換流站5061斷路器進行修復、調試期間，發現5061斷路器3天內偷跳達5次。
1 分 析
如在不改變斷路器動作特性的基礎上適當提高分閘線圈上的低動作電壓，則可增強斷路器分閘回路的抗幹擾能力，使之能滿足如下要求：
1) 提高分閘線圈兩端的低動作電壓，期望在30% Un(Un為額定電壓)左右；
2) 分閘線圈串上電阻後分閘回路兩端的低動作電壓不能超過65%Un；
3) 更換分閘線圈後，斷路器的分閘時間等動作特性應符合規程要求；
4) 分閘線圈符合分閘電流通流能力的要求，防跳繼電器(TBJ啟動電流為1A)可靠動作。
當操動機構的分閘閥不改變時，其所需小開始動作的力F和機械功W將保持不變〔1〕。
F=6.4(IN)2〔S／δ＋0.8g(z/l)2〕×10－8，kg (1)
在電磁鐵參數不變時有：
F （IN）2 (2)
W=(IN)2(Gδ0-Gδm)/2＝(IN)2Gδ0/2 (3)
式中Gδ0為電磁鐵在吸合位置的磁導；Gδm為電磁鐵在釋放位置的磁導；z,l為電磁鐵的結構參數。
由式(1)、(3)可知，若不改變操動機構的動作特性，就要保持分閘線圈的IN(安匝數)不變，在此前提下提高分閘線圈上的低動作電壓，有兩種方法：
1) 改變閥結構，使分閘閥啟動所需的力F和機械功W增加，這樣由式(1)、(3)可知，如線圈匝數N和其他參數不變時，就會提高分閘電磁鐵開始動作時所需的啟動電流Id，從而提高了分閘線圈上的低動作電壓；
2) 更換線圈，根據式(1)、(2)、(3)知，分閘閥啟動所需的力F和靜態機械功W不變時如改變分閘線圈，則更換前後兩分閘線圈的IN應不變，故
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New Digi 77000012-New Bulk Com/8i 16C450 New Bulk
Motorola 09202-C6-0821306-8881 5V 850ma power supply with small barrel connecto
Digi ST-1008-GEM2 8 Port SCSI Terminal Server w/ps (Digi/Central Data)
Comtrol 5002505 (no cable) Rocketport Express PCI Quad/Octa
New Comtrol A10087 Rocketport PCI 8J - Retail Boxed
Multitech 01006350 rev a Power Supply 14v a/c output 2 pin with lock (120v a/c
New Digi 62080060F Cable EBI HDB44 60 inch host to PORTS module
Moxa Nport 5610-8 8 port RJ45
Digi 70001193 Acceleport 4r PCI 422 w/DB25M
Digi 70001194 Acceleport 4r PCI 422 w/DB9
New Digi 70001807 Portserver TS 4 MEI New Retail Sealed
New Digi 76000617 Acceleport Ports/16em Rackmount RJ-45 w/16 inch cable
Digi 50001208-01 Portserver TS 8 RJ-45 Terminal Server w/ps (1 Bad Port)
Comtrol 5302210 w/Octa DB9F RocketPort Plus UPCI 422 w/Octa DB9F
Digi 76000072 Ports 16em RJ-45 Xem w/Cable
Digi 70001733 PORTSERVER TS 16 PORT RJ-45
Digi C/CON-16 Rack C/CON 16-port RS-232 RJ-45 1U rack
New Digi 70001979 Portserver TS 8 MEI New Retail Open Box
Digi 50000491-01 Acceleport 8r PCI 422
New Digi 76000068 Acceleport C/X C/Con 16 RJ45 Factory Sealed Retail Boxed
Digi 76000588 Acceleport 16P RJ45 Box (No PCI Card)
Equinox 600-590-001 8 Port uPCI Modem Card Full Length
Equinox 600590-KBM1 8 Port uPCI Modem Card Full Length
Equinox 910331/C4 8 Port uPCI Modem Card Full Length
Comtrol 99445-9 DeviceMaster RTS 4port RS232/422/485 w/DB9M ports
New Digi 50000584-02 Open Retail Box C/Con 16 AIX w/p/C4 8 Port uPCI Modem Card Full Length
Comtrol 99445-9 DeviceMaster RTS 4port RS232/422/485 w/DB9M ports
New Digi 50000584-02 Open Retail Box C/Con 16 AIX w/p
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