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CUTLER HAMMER BIM 7801C61G01輸出控制器
熱過載保護(hù)，雙時間常數(shù)TRPTTR如果電力變壓器或發(fā)電機(jī)達(dá)到非常高的溫度，設(shè)備可能會損壞。變壓器/發(fā)電機(jī)內(nèi)的絕緣將強(qiáng)制老化。因此，內(nèi)部相間短路或相間接地故障的風(fēng)險(xiǎn)將增加。高溫會降低變壓器/發(fā)電機(jī)的絕緣質(zhì)量。熱過載保護(hù)持續(xù)估計(jì)變壓器/發(fā)電機(jī)的內(nèi)部熱含量（溫度）。該估算是通過使用變壓器/發(fā)電機(jī)的熱模型進(jìn)行的，該模型具有兩個時間常數(shù)，基于電流測量。有兩個警告級別可用。這樣可以在達(dá)到危險(xiǎn)溫度之前在電力系統(tǒng)中采取行動。如果溫度繼續(xù)升高至跳閘值，保護(hù)裝置將啟動受保護(hù)變壓器/發(fā)電機(jī)的跳閘。斷路器故障保護(hù)CCRBRF斷路器故障防護(hù)（CCRBRF）確保在自身斷路器無法斷開的情況下，周圍斷路器快速后備跳閘。CCRBRF可以基于電流、基于觸點(diǎn)或這兩種條件的自適應(yīng)組合。重置時間極短的電流檢查被用作檢查標(biāo)準(zhǔn)，以實(shí)現(xiàn)高安全性，防止意外操作。當(dāng)通過斷路器的故障電流很小時，可以使用觸點(diǎn)檢查標(biāo)準(zhǔn)。CCRBRF可以是單相或三相啟動，以允許與單相跳閘應(yīng)用一起使用。對于三相版本的CCRBRF，僅當(dāng)四取二（例如，兩相或單相加剩余電流啟動）時，才能將電流標(biāo)準(zhǔn)設(shè)置為運(yùn)行。這為備用跳閘命令提供了更高的安全性。CCRBRF功能可編程為對自身斷路器進(jìn)行單相或三相重新跳閘，以避免因測試過程中的錯誤而導(dǎo)致周圍斷路器在錯誤啟動時不必要地跳閘。
極不一致保護(hù)CCRPLD
斷相可能會導(dǎo)致負(fù)序和零序電流，從而對旋轉(zhuǎn)機(jī)器造成熱應(yīng)力，并可能導(dǎo)致零序或負(fù)序電流功能的不必要操作。通常，自身斷路器跳閘以糾正這種情況。如果這種情況持續(xù)存在，應(yīng)跳閘周圍的斷路器，以清除不對稱負(fù)載情況。極化保護(hù)功能CCRPLD根據(jù)三相斷路器輔助觸點(diǎn)的信息運(yùn)行，需要時根據(jù)不對稱相電流的附加標(biāo)準(zhǔn)。定向過/欠功率保護(hù)GOPPDOP/GUPPDUP在需要高/低有功、無功或視在功率保護(hù)或警報(bào)的地方，可以使用定向過/功率不足保護(hù)GOPPDOP/GUPDDUP。這些功能還可用于檢查電力系統(tǒng)中有功或無功功率流的方向。有許多應(yīng)用程序需要此類功能。其中包括：?發(fā)電機(jī)反向功率保護(hù)?發(fā)電機(jī)正向低功率保護(hù)?檢測過勵磁/欠勵磁發(fā)電機(jī)?檢測反向有功潮流?檢測高無功潮流?帶有功或無功功率的過多線路/電纜負(fù)載?發(fā)電機(jī)反向功能保護(hù)每個功能有兩個步驟，具有一定的延時。也可以設(shè)置兩個步驟的重置時間。通過使用可選的計(jì)量級CT輸入，汽輪機(jī)應(yīng)用可達(dá)到0.5%的精度。機(jī)器NS2PTOC的負(fù)序時間過電流保護(hù)主要用于保護(hù)發(fā)電機(jī)，防止定子電流中的負(fù)序電流導(dǎo)致轉(zhuǎn)子過熱。發(fā)電機(jī)中的負(fù)序電流可能由以下原因引起：?不平衡負(fù)載?線對線故障?線對地故障?導(dǎo)線斷裂?斷路器或隔離開關(guān)的一個或多個極故障
Thermal overload protection, two time constant TRPTTR
If a power transformer or generator reaches very high temperatures the equipment might be damaged. The insulation within the transformer/generator will have forced ageing. As a consequence of this the risk of internal phase-tophase or phase-to-earth faults will increase. High temperature will degrade the quality of the transformer/generator insulation. The thermal overload protection estimates the internal heat content of the transformer/generator (temperature) continuously. This estimation is made by using a thermal model of the transformer/generator with two time constants, which is based on current measurement. Two warning levels are available. This enables actions in the power system to be done before dangerous temperatures are reached. If the temperature continues to increase to the trip value, the protection initiates a trip of the protected transformer/generator. Breaker failure protection CCRBRF Breaker failure protection (CCRBRF) ensures fast back-up tripping of surrounding breakers in case the own breaker fails to open. CCRBRF can be current based, contact based, or an adaptive combination of these two conditions.Current check with extremely short reset time is used as check criterion to achieve high security against inadvertent operation. Contact check criteria can be used where the fault current through the breaker is small. CCRBRF can be single- or three-phase initiated to allow use with single phase tripping applications. For the three-phase version of CCRBRF the current criteria can be set to operate only if two out of four for example, two phases or one phase plus the residual current start. This gives a higher security to the back-up trip command. CCRBRF function can be programmed to give a single- or three-phase re-trip of the own breaker to avoid unnecessary tripping of surrounding breakers at an incorrect initiation due to mistakes during testing.
Pole discordance protection CCRPLD
An open phase can cause negative and zero sequence currents which cause thermal stress on rotating machines and can cause unwanted operation of zero sequence or negative sequence current functions. Normally the own breaker is tripped to correct such a situation. If the situation persists the surrounding breakers should be tripped to clear the unsymmetrical load situation. The Polediscordance protection function CCRPLD operates based on information from auxiliary contacts of the circuit breaker for the three phases with additional criteria from unsymmetrical phase currents when required. Directional over/underpower protection GOPPDOP/ GUPPDUP The directional over-/under-power protection GOPPDOP/ GUPPDUP can be used wherever a high/low active, reactive or apparent power protection or alarming is required. The functions can alternatively be used to check the direction of active or reactive power flow in the power system. There are a number of applications where such functionality is needed. Some of them are: ? generator reverse power protection ? generator low forward power protection ? detection of over/under excited generator ? detection of reversed active power flow ? detection of high reactive power flow ? excessive line/cable loading with active or reactive power ? generator reverse power protection Each function has two steps with definite time delay. Reset times for both steps can be set as well. By using optional metering class CT inputs accuracy of 0,5% can be achieved for steam turbine applications.Negative-sequence time overcurrent protection for machines NS2PTOC is intended primarily for the protection of generators against possible overheating of the rotor caused by negative sequence current in the stator current. The negative sequence currents in a generator may, among others, be caused by: ? Unbalanced loads ? Line to line faults ? Line to earth faults ? Broken conductors ? Malfunction of one or more poles of a circuit breaker or a disconnector
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PLC可編程控制器模塊，DCS卡件，ESD系統(tǒng)卡件，振動監(jiān)測系統(tǒng)卡件，汽輪機(jī)控制系統(tǒng)模塊，燃?xì)獍l(fā)電機(jī)備件等，優(yōu)勢品牌：Allen Bradley、BentlyNevada、ABB、Emerson Ovation、Honeywell DCS、Rockwell ICS Triplex、FOXBORO、Schneider PLC、GE Fanuc、Motorola、HIMA、TRICONEX、Prosoft等各種進(jìn)口工業(yè)零部件、歐美進(jìn)口模塊。
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