ICS TRIPLEX T8921工控模塊備件
任何沒有跳閘或報警的RTD都將被忽略。拾取此條件并提供充分保護時。因此，過電壓元件可用于在持續(xù)過電壓情況下保護電機。4.10.3相位反轉(zhuǎn)469可檢測三相電壓的相位旋轉(zhuǎn)。如果所有三相電壓均大于電機銘牌電壓的50%時，相位反轉(zhuǎn)功能開啟，且三相電壓的相位旋轉(zhuǎn)與設定值不同，則跳閘和閉塞啟動將在500至700毫秒內(nèi)發(fā)生。啟用單VT操作時，此功能不起作用。? 過電壓，過電壓? [輸入]了解更多過壓報警：關(guān)閉范圍：關(guān)閉、鎖定、未鎖定分配報警繼電器：報警范圍：報警、報警和輔助2、報警和輔2和輔3、報警和副3、輔助2、輔2和輔助3、輔3過壓報警拾?。?.05 x額定范圍：1.01至1.20 x額定值，步驟0.01過壓報警延遲：3.0 s范圍：0.5至60.0秒，步驟0.1過壓報警事件：關(guān)閉范圍，關(guān)斷過電壓跳閘：關(guān)斷范圍：關(guān)斷、閉鎖、未閉鎖分配跳閘繼電器：跳閘范圍：+瓦和+瓦。同步電機可以消耗瓦特和無功功率，或者消耗瓦特和產(chǎn)生無功功率。這些條件在469上分別顯示為+瓦、+瓦和+瓦、–瓦（見下圖）。圖4–19：功率測量慣例I1 I2 I3 I4 ^^^^^ GE功率管理469電機管理繼電器4-67 4設定點編程4.11 S10功率元件4 4.11.2功率因數(shù)如果469應用于s 4 4.11.6扭矩設置在確定扭矩之前，必須在此處輸入電機定子電阻和極對數(shù)?；A(chǔ)定子電阻可根據(jù)電機的額定電壓和電流確定。扭矩計量僅適用于感應電機，僅計算正扭矩。定子電阻和磁極對請參考電機規(guī)范。扭矩的默認單位為牛頓米（Nm）的SI單位。扭矩單位可選擇為牛頓米或英尺磅。1牛米=0.738英尺·磅。4.11.7過轉(zhuǎn)矩設置可在此處設置電機過轉(zhuǎn)矩狀態(tài)的檢測，通常用于保護電機驅(qū)動的設備。當測得的扭矩在指定的持續(xù)時間內(nèi)超過指定水平時，指定的繼電器啟動。? 扭矩設置? [輸入]更多扭矩測量禁用范圍：禁用，啟用定子電阻：0.004? 范圍：0.001至COUNTER當達到跳閘計數(shù)器限值時，將發(fā)生報警。必須清除行程計數(shù)器或提高報警級別，并且必須按下重置鍵（如果報警已鎖定）以重置報警。例如，將跳閘計數(shù)器報警設置為100可能很有用，這樣，如果發(fā)生100次跳閘，產(chǎn)生的報警會提示操作員或主管調(diào)查發(fā)生的跳閘類型。A3維護\跳閘計數(shù)器上可以找到按類型列出的跳閘明細。如果發(fā)現(xiàn)趨勢，則需要進一步調(diào)查。4.12.2啟動器故障如果啟動器故障警報設置為“鎖定”或“未鎖定”，則469啟動跳閘時，將監(jiān)控啟動器狀態(tài)輸入和電機電流。如果起動機狀態(tài)觸點在編程時間延遲后未改變狀態(tài)或電機電流未降至零，則會發(fā)生報警。延時應略長于斷路器或接觸器的運行時間。如果發(fā)生報警并且選擇“斷路器”作為啟動器類型，則報警將為斷路器故障。如果起動器類型選擇了“接觸器”，警報將為焊接接觸器。此外，如果選擇的啟動器類型為“斷路器”，則可啟用跳閘線圈監(jiān)控。?如果選擇了“52 Closed”（52閉合），跳閘線圈監(jiān)控電路會在啟動器狀態(tài)輸入指示斷路器閉合或檢測到電機電流時監(jiān)測跳閘線圈電路的連續(xù)性。如果連續(xù)性中斷，啟動器故障警報將指示跳閘線圈監(jiān)控。?如果選擇了“52開/關(guān)”，跳閘線圈監(jiān)控電路將始終監(jiān)控跳閘線圈電路的連續(xù)性，而不考慮斷路器狀態(tài)。
Any RTDs that do not have a trip or alarm associated with them will be ignored for this feature. When pickup this condition and provide adequate protection. Therefore, the overvoltage element may be useful for protecting the motor in the event of a sustained overvoltage condition. 4.10.3 PHASE REVERSAL The 469 can detect the phase rotation of the three phase voltage. If the Phase Reversal feature is turned on when all 3 phase voltages are greater than 50% motor nameplate voltage, and the phase rotation of the three phase voltages is not the same as the setpoint, a trip and block start will occur in 500 to 700 ms. This feature does not work when single VT operation is enabled. ? OVERVOLTAGE ? [ENTER] for more OVERVOLTAGE ALARM: Off Range: Off, Latched, Unlatched ASSIGN ALARM RELAYS: Alarm Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3, Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3 OVERVOLTAGE ALARM PICKUP: 1.05 x RATED Range: 1.01 to 1.20 x RATED, step 0.01 OVERVOLTAGE ALARM DELAY: 3.0 s Range: 0.5 to 60.0 sec., step 0.1 OVERVOLTAGE ALARM EVENTS: Off Range: On, Off OVERVOLTAGE TRIP: Off Range: Off, Latched, Unlatched ASSIGN TRIP RELAYS: Trip Range: +Watts and +vars. A synchronous motor can consume Watts and vars or consume Watts and generate vars. These conditions are displayed on the 469 as +Watts, +vars, and +Watts, –vars respectively (see the figure below). Figure 4–19: POWER MEASUREMENT CONVENTIONS I1 I2 I3 I4 ^ ^ ^ ^ GE Power Management 469 Motor Management Relay 4-67 4 SETPOINT PROGRAMMING 4.11 S10 POWER ELEMENTS 4 4.11.2 POWER FACTOR If the 469 is applied on a s 4 4.11.6 TORQUE SETUP Before torque can be determined, the motor stator resistance and number of pole pairs must be entered here. The base stator resistance can be determined from the motor’s rated voltage and current. Torque metering is intended for induction motors only, and only positive torque is calculated. Please consult the motor specifications for the stator resistance and the pole pairs. The default unit for torque is the SI unit of Newton-meter (Nm). The torque unit is selectable to either Newtonmeter or foot-pound. 1 Nm = 0.738 ft·lb. 4.11.7 OVERTORQUE SETUP Detection of a motor overtorque condition, usually done to protect devices driven by the motor, can be set up here. The assigned relay activates when the torque measured exceeds the specified level for the specified time duration. ? TORQUE SETUP ? [ENTER] for more TORQUE METERING Disabled Range: Disabled, Enabled STATOR RESISTANCE: 0.004 ? Range: 0.001 to COUNTER When the Trip Counter Limit is reached, an alarm will occur. The trip counter must be cleared or the alarm level raised and the reset key must be pressed (if the alarm was latched) to reset the alarm. For example, it might be useful to set a Trip Counter alarm at 100 so that if 100 trips occur, the resulting alarm prompts the operator or supervisor to investigate the type of trips that occurred. A breakdown of trips by type may be found on A3 MAINTENANCE\TRIP COUNTERS. If a trend is detected, it would warrant further investigation. 4.12.2 STARTER FAILURE If the STARTER FAILURE ALARM is set to "Latched" or "Unlatched", then the Starter Status input and motor current are monitored when the 469 initiates a trip. If the starter status contacts do not change state or motor current does not drop to zero after the programmed time delay, an alarm occurs. The time delay should be slightly longer than the breaker or contactor operating time. If an alarm occurs and "Breaker" was chosen as the starter type, the alarm will be Breaker Failure. If "Contactor" was chosen for starter type, the alarm will be Welded Contactor. Also, if the starter type chosen is "Breaker", Trip Coil Supervision may be enabled. ? If "52 Closed" is selected, the trip coil supervision circuitry monitors the trip coil circuit for continuity any time the starter status input indicates that the breaker is closed or motor current is detected. If that continuity is broken, a Starter Failure alarm will indicate Trip Coil Supervision. ? If "52 Open/Closed" is selected, the trip coil supervision circuitry monitors the trip coil circuit for continuity at all times, regardless of breaker state.
