ICS TRIPLEX T8921工控模块备件
任何没有跳闸或报警的RTD都将被忽略。拾取此条件并提供充分保护时。因此，过电压元件可用于在持续过电压情况下保护电机。4.10.3相位反转469可检测三相电压的相位旋转。如果所有三相电压均大于电机铭牌电压的50%时，相位反转功能开启，且三相电压的相位旋转与设定值不同，则跳闸和闭塞启动将在500至700毫秒内发生。启用单VT操作时，此功能不起作用。❙ 过电压，过电压❙ [输入]了解更多过压报警：关闭范围：关闭、锁定、未锁定分配报警继电器：报警范围：报警、报警和辅助2、报警和辅2和辅3、报警和副3、辅助2、辅2和辅助3、辅3过压报警拾取：1.05 x额定范围：1.01至1.20 x额定值，步骤0.01过压报警延迟：3.0 s范围：0.5至60.0秒，步骤0.1过压报警事件：关闭范围，关断过电压跳闸：关断范围：关断、闭锁、未闭锁分配跳闸继电器：跳闸范围：+瓦和+瓦。同步电机可以消耗瓦特和无功功率，或者消耗瓦特和产生无功功率。这些条件在469上分别显示为+瓦、+瓦和+瓦、–瓦（见下图）。图4–19：功率测量惯例I1 I2 I3 I4 ^^^^^ GE功率管理469电机管理继电器4-67 4设定点编程4.11 S10功率元件4 4.11.2功率因数如果469应用于s 4 4.11.6扭矩设置在确定扭矩之前，必须在此处输入电机定子电阻和极对数。基础定子电阻可根据电机的额定电压和电流确定。扭矩计量仅适用于感应电机，仅计算正扭矩。定子电阻和磁极对请参考电机规范。扭矩的默认单位为牛顿米（Nm）的SI单位。扭矩单位可选择为牛顿米或英尺磅。1牛米=0.738英尺·磅。4.11.7过转矩设置可在此处设置电机过转矩状态的检测，通常用于保护电机驱动的设备。当测得的扭矩在指定的持续时间内超过指定水平时，指定的继电器启动。❙ 扭矩设置❙ [输入]更多扭矩测量禁用范围：禁用，启用定子电阻：0.004Ω 范围：0.001至COUNTER当达到跳闸计数器限值时，将发生报警。必须清除行程计数器或提高报警级别，并且必须按下重置键（如果报警已锁定）以重置报警。例如，将跳闸计数器报警设置为100可能很有用，这样，如果发生100次跳闸，产生的报警会提示操作员或主管调查发生的跳闸类型。A3维护\跳闸计数器上可以找到按类型列出的跳闸明细。如果发现趋势，则需要进一步调查。4.12.2启动器故障如果启动器故障警报设置为“锁定”或“未锁定”，则469启动跳闸时，将监控启动器状态输入和电机电流。如果起动机状态触点在编程时间延迟后未改变状态或电机电流未降至零，则会发生报警。延时应略长于断路器或接触器的运行时间。如果发生报警并且选择“断路器”作为启动器类型，则报警将为断路器故障。如果起动器类型选择了“接触器”，警报将为焊接接触器。此外，如果选择的启动器类型为“断路器”，则可启用跳闸线圈监控。•如果选择了“52 Closed”（52闭合），跳闸线圈监控电路会在启动器状态输入指示断路器闭合或检测到电机电流时监测跳闸线圈电路的连续性。如果连续性中断，启动器故障警报将指示跳闸线圈监控。•如果选择了“52开/关”，跳闸线圈监控电路将始终监控跳闸线圈电路的连续性，而不考虑断路器状态。
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 Ω 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.
