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公司基本資料信息
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陜西欣鴻然自動化設備有限公司
v?聯(lián)系人:寧輝
v?熱??線:029-83338940
v?手?機:18049484083??
v?Q?Q:271968858????Q?Q:1067802570????????
v?傳真:029-83561013??
因為直流不象交流那樣有零點(電流零交叉點),因此一旦產(chǎn)生電弧就很難消除,電弧時間很長。而且電流方向不變,所以會出現(xiàn)接點遷移現(xiàn)象,接點會由于凹凸不平而無法斷開,可能導致誤動作。
有些種類的負載的恒定電流和浪涌電流相差很大。需在允許的浪涌電流值范圍內(nèi)使用。閉路時的浪涌電流越大,接點的消耗量和遷移量也越大,就會因接點的熔接和遷移導致接點無法開關的故障。
在含有電感應的情況下會產(chǎn)生反向感應電壓,電壓越高能量越大,接點的消耗和遷移也隨之增大,
因此,需確認額定的條件,在額定值中標出了控制容量,但僅這些是不夠的,在接通時和切斷時的電壓、電流波形、負載的種類等特殊的負載電路中,必須分別進行實際設備測試確認。微小電壓、電流的場合需使用微小負載用產(chǎn)品。使用一般用途的銀質(zhì)接點時,
The?button?can?be?classified?according?to?the?operation?mode,?protection?mode,?types?and?features?of?the?common?button:
Open?type:?suitable?for?embedded?and?fixed?in?the?switch?board,
Control?cabinet?panel?or?console.?Codenamed?K.
Type:?protection?with?protective?shell,?can?prevent?the?internal?button?parts?of?mechanical?damage?or?touch?live?parts,?codenamed?H.
Waterproof?type:?with?sealed?shell,?can?prevent?water?intrusion.?Codenamed?S.
Antiseptic:?can?prevent?the?intrusion?of?chemical?corrosive?gas.?Codenamed?F.
Explosion?proof?type:?can?be?used?for?containing?explosive?gas?and?dust?in?the?place?without?causing?detonation,?such?as?coal?mines?and?other?places.?Codenamed?B.
Knob?type:?hand?rotation?operation?has?on-off?contacts,?two?position,?mounted?to?the?general?panel.?Codenamed?X.
Key:?a?key?is?inserted?into?a?rotating?operation,?can?prevent?misoperation?or?for?special?operation.?Codenamed?Y.
Emergency:?big?red?button?to?highlight?the?mushroom?head,
Button?switch
To?cut?power?use.?The?code?for?the?J?or?M.
Self:?inside?the?button?with?self-sustaining?electromagnetic?mechanism,?mainly?used?in?power?plant,?substation?or?test?equipment,?communication?signal?operators?and?instructions,?general?operation?panel.?Codenamed?Z.
Light?button:?the?button?is?arranged?in?the?lamp,?in?addition?to?the?publish?operation?command,?a?signal?indicating,?for?control?cabinet,?console?panel.?Codenamed?D.
Combination?type:?multiple?button?combination.?Codenamed?E.
Synchronization?type:?multiple?contact?interlock?each?other.?Codenamed?C.
Classification?by?purpose?and?structure:
1,?open?button
2,?a?normally?closed?button
3,?composite?button
Ambient?air?temperature
-25?~?+40?degree?C?C
Altitude:?2000m
Relative?humidity:?less?than?90%
The?pollution?level?3
The?level?of?protection?IP55
Switch:?AC-15?36V/10A?110V/10A?220V/5A?rating?380V/2.7A?660V/1.8A
DC-6V/4A?12/4A?24V/4A?48V/4A?110V/2A?220V/1A?440V/0.6A
Vheating?current:?1th?10A
Shock?resistance:?less?than?50m.
Insulation?resistance:?10M?ohm
Mechanical?life:?general?button?n?=?100?*?10^4;?the?knob?over?30?*?10^4?times.
Key?button?n?=?5?*?10^4;?emergency?stop?button?over?5?*?10^4
Note
AC?and?DC?circuit?switch?ability
Button?switch?(Figure?5)
Big?difference,?need?to?confirm?the?ratings.
DC?control?capacity?is?very?low.?This?is?mainly?because?the?DC?as?the?exchange?that?(zero?current?zero?crossing?point),?so?it?is?difficult?to?remove?once?the?arc,?arc?for?a?long?time.?But?the?current?direction,?so?there?will?be?the?phenomenon?of?migration?due?to?uneven?contact?contact,?and?cannot?be?disconnected,?may?cause?malfunction.
Some?kinds?of?load?constant?current?and?surge?current?difference.?The?surge?current?allowed?value?range.?When?the?surge?current?closed,?consumption?and?migration?quantity?of?contacts?is?also?bigger,?will?lead?to?failure?due?to?the?migration?of?contact?can?not?switch?contact?welding?and.
In?the?presence?of?electric?induction?conditions?will?have?a?reverse?voltage,?the?higher?the?voltage?the?greater?the?energy?consumption,?and?migration?of?contacts?is?also?increased,
Therefore,?need?to?confirm?the?rated?conditions,?the?ratings?indicate?the?control?capacity,?but?that?alone?is?not?enough,?the?special?load?circuit?is?switched?on?and?off?when?the?voltage,?current?waveform,?load?type,?must?be?respectively?the?actual?equipment?test?confirmation.?Small?voltage,?current?situation?requires?the?use?of?small?load?products.?The?use?of?general?purpose?when?silver?contacts,
Button?switch?(Figure?6)
May?lead?to?reduced?contact?reliability.
Micro?button?switch,?button?switch?beyond?the?range?of?high?load,?please?connect?the?load?for?the?relay.
Determine?the?aircraft?rated?conditions?are?as?follows:
Inductive?load:?power?factor?above?0.4?(AC),?time?constant?7ms?(DC).
Light?load:?load?surge?current?is?equivalent?to?10?times?the?constant?current.
Motor?load:?inrush?current?with?load?equivalent?to?6?times?the?constant?current.
Note:?the?inductive?load?is?especially?
800G-DLSGXK
800G-DLSGXL
800G-DLSR
800G-DLSRXK
800G-DLSRXL
800G-DLSW
800G-DLSWXK
800G-DLSWXL
800G-DLSY
800G-DLSYXK
800G-DLSYXL
800G-F2
800G-F3
800G-F4
800G-F5
800G-K14
800G-K16
800G-K24
800G-KSB34H
800G-KSL32H
800G-KSL34H
800G-KSL37H
800G-KSM21H
800G-KSM22H
800G-KSM23H
800G-KSM31H
800G-KSM32H
800G-KSM33H
800G-KSM34H
800G-KSM35H
800G-KSM36H
800G-KSM37H
800G-KSR21H
800G-KSR31H
800G-KSR34H
800G-KSR35H
800G-LF1
800G-LF3
800G-LF4
800G-LF5
800G-LF6
800G-M2
800G-MKE
800G-MPE
800G-MPE99
800G-N2
800G-P1
800G-P3
800G-P4
800G-P5
800G-P6
800G-SB3
800G-SB3H
800G-SL3
800G-SL3H
800G-SM2
800G-SM2H
800G-SM3
800G-SM3H
800G-SR3
800G-SR3H
800G-U2FX
800G-V2FX
800G-XBA
800G-XBM
800G-XBN
800G-XLC3A
800G-XLC3M
800G-XLC3N
800G-XLC8A
800G-XLSA
800G-XLSM
800G-XLSN