產(chǎn)品細節(jié)介紹
PPD113B03-26-100100控制器
機械堵塞
如果該過程導致電機容易發(fā)生機械堵塞，請相應地設置機械堵塞跳閘和警報。在里面大多數(shù)情況下，過載跳閘將在機械跳閘之前激活，但是，如果選擇高過載曲線，機械堵塞水平和時間延遲變得更為關(guān)鍵。然后應將設置設置為低于過載曲線但高于電機的任何正常過載條件。機械卡住元件的主要用途是保護因設備堵塞或損壞而驅(qū)動的設備。
暗流如果特定應用需要檢測負載損失，則根據(jù)以下電流設置欠流元件將指示負載損失。例如，可以為泵應用程序編程，以檢測管道中的流體損失。不平衡報警和跳閘通過檢查電機應用和電機設計來確定不平衡設置。在這種情況下，電機受保護的是往復式壓縮機，在這種情況下，不平衡將是一種正常的運行狀態(tài)，因此該設置應為設置為高。不平衡報警的設置為20%，延時為10秒是合適的，可以設置跳閘至25%，延遲10秒接地故障遺憾的是，沒有足夠的信息來確定接地故障設置。
這些設置取決于以下內(nèi)容信息：
1.接地故障電流可用。
2.系統(tǒng)接地-高電阻接地、牢固接地等。
3.使用接地故障CT。
4.接地故障連接-零序或剩余連接。
加速跳閘
該設定值應設置為高于最大啟動時間，以避免在電壓較低或用于啟動期間的不同負載。如果使用降壓起動，則設置為8秒是合適的，如果是直接起動如果使用跨線啟動，則可以使用5秒的設置。
啟動禁止在五次成功啟動后，應始終啟用此功能，以在啟動時保護電機熱的369學習開始時使用的熱容量。如果電機是熱的，因此具有一定的熱容量如果可用熱容量小于啟動所需的熱容量，369將不允許啟動。更多信息有關(guān)禁止啟動的信息，請參閱第7.6.6節(jié)中的應用說明。
開始時間/小時啟動次數(shù)/小時可根據(jù)數(shù)據(jù)表設置為冷啟動次數(shù)。對于本例，starts/hour將設置為3。
啟動間隔時間
在某些情況下，電機制造商將指定電機啟動之間的時間間隔。在本例中，此信息不是因此此功能可以“關(guān)閉”。但是，如果給出了信息，則電機數(shù)據(jù)表上提供的時間應進行編程。
定子RTD
RTD跳閘水平應設置為或低于絕緣的最高溫度額定值。該示例具有F級絕緣，其額定溫度為155°C，因此定子RTD跳閘水平應設置為140°C至155°C。RTD警報級別應設置為一個級別，以警告電機溫度正在上升。為了這個例如，120°C或130°C是合適的。
軸承RTD
軸承RTD報警和跳閘設置將通過評估軸承的溫度規(guī)格來確定
Mechanical Jam
If the process causes the motor to be prone to mechanical jams, set the Mechanical Jam Trip and Alarm accordingly. In most cases, the overload trip will become active before the Mechanical Trip, however, if a high overload curve is chosen, the Mechanical Jam level and time delay become more critical. The setting should then be set to below the overload curve but above any normal overload conditions of the motor. The main purpose of the mechanical jam element is to protect the driven equipment due to jammed, or broken equipment. Undercurrent If detection of loss of load is required for the specific application, set the undercurrent element according to the current that will indicate loss of load. For example, this could be programmed for a pump application to detect loss of fluid in the pipe.
Unbalance Alarm and Trip
The unbalance settings are determined by examining the motor application and motor design. In this case, the motor being protected is a reciprocating compressor, in which unbalance will be a normal running condition, thus this setting should be set high. A setting of 20% for the Unbalance Alarm with a delay of 10 seconds would be appropriate and the trip may be set to 25% with a delay of 10 seconds Ground Fault Unfortunately, there is not enough information to determine a ground fault setting. These settings depend on the following information: 1. The Ground Fault current available. 2. System Grounding - high resistive grounding, solidly grounded, etc. 3. Ground Fault CT used. 4. Ground Fault connection - zero sequence or Residual connection. Acceleration Trip This setpoint should be set higher than the maximum starting time to avoid nuisance tripping when the voltage is lower or for varying loads during starting. If reduced voltage starting is used, a setting of 8 seconds would be appropriate, or if direct across the line starting is used, a setting of 5 seconds could be used. Start Inhibit This function should always be enabled after five successful starts to protect the motor during starting while it is already hot. The 369 learns the amount of thermal capacity used at start. If the motor is hot, thus having some thermal capacity, the 369 will not allow a start if the available thermal capacity is less than the required thermal capacity for a start. For more information regarding start inhibit refer to application note in section 7.6.6. Starts/Hour Starts/Hour can be set to the # of cold starts as per the data sheet.
For this example
the starts/hour would be set to 3. Time Between Starts In some cases, the motor manufacturer will specify the time between motor starts. In this example, this information is not given so this feature can be turned “Off”. However, if the information is given, the time provided on the motor data sheets should be programmed. Stator RTDs RTD trip level should be set at or below the maximum temperature rating of the insulation. This example has a class F insulation which has a temperature rating of 155°C, therefore the Stator RTD Trip level should be set to between 140°C to 155°C. The RTD alarm level should be set to a level to provide a warning that the motor temperature is rising. For this example, 120°C or 130°C would be appropriate. Bearing RTDs The Bearing RTD alarm and trip settings will be determined by evaluating the temperature specification from the bearing manufacturer.
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