IS200BPVCG自动化模块备件
热容量使用时间（分钟）cdr Iavg@100%FLA Iavg@50%FLA指数冷却（热/冷曲线比率由于不平衡电压导致的不平衡电机降额因数469电机保护系统4 GEGridSolutions.com。备用功能也可分配给辅助触点，用于上游保护装置接地故障的报警或远程跳闸。该功能旨在保护电机免受相间接地故障继电器，支持以下类型的接地电流检测。•铁芯平衡（零序）电流互感器。•铁芯平衡（零序）50:0.025 A（灵敏）电流互感器。•相电流互感器的剩余连接。该功能配备了一个过流滤波器，可在故障发生或电机启动时从不对称电流中去除直流分量。两个具有单独时间延迟的拾取级别（跳闸和报警）可用于接地故障检测。行程备份功能也是此功能的一部分。接地故障跳闸备份的操作原理与短路跳闸备份相同。电压和频率保护使用电压和频率防护功能来检测异常的系统电压和频率条件，这可能会对电机造成危害。以下电压元件可用：•过电压和欠电压•过频率和欠频率•相位反转为避免意外跳闸，469可设置为在向电机供电的母线断电或VT保险丝故障条件下阻断欠电压元件。功率元件469继电器中有以下功率元件。前四个元件在电机启动过程中具有闭锁功能。功率因数该元件用于同步电机应用中，以检测失步情况。无功功率该元件用于规定无功功率限制的应用中。欠功率用于检测负载损失。反向有功功率用于检测电机可能成为发电机的情况。过度扭矩该元件用于保护从动负载免受机械损坏。电流不平衡除了热模型偏置电流不平衡外，469继电器还作为一个独立元件提供，具有2个拾取电平和内置单相检测算法。RTD保护469具有12个可编程RTD输入，支持4种不同类型的RTD传感器。RTD输入通常用于监测定子、轴承、环境温度以及电机组件中可能过热的其他部件。每个RTD输入有3个操作级别：报警、高报警和跳闸。469还支持RTD跳闸表决，并提供开路/短路RTD故障报警。附加和特殊功能•双速电机保护。•用于循环负载应用的负载平均滤波器•降低电压启动监控。•变频滤波器允许VFD应用中模拟值的精确传感和计算。•双驱动应用的模拟输入差分计算。•速度计数器跳闸和报警。•通用数字计数器跳闸和报警。•脉冲KWh和Kvarh输出。•跳闸线圈监控。•拉出指示器、设定值访问和测试许可输入。
Thermal Capacity Used Time in Minutes cdr Iavg @ 100% FLA Iavg @ 50% FLA Exponential cooldown (hot/cold curve ratio Unbalance Motor derating factor due to unbalanced voltage 469 Motor Protection System 4 GEGridSolutions.com The backup feature can also be assigned to an auxiliary contact for annunciation or remote tripping of upstream protection devices Ground Fault This function is designed to protect motors against phase to ground faults. There are two dedicated ground current inputs in the relay, which support the following types of ground current detection. • Core balance (Zero sequence) current transformer. • Core balance (Zero sequence) 50:0.025 A (sensitive) current transformer. • Residual connection of phase current transformers. The function is equipped with an overreach filter, which removes the DC component from the asymmetrical current present at the moment a fault occurs, or a motor starts. Two pickup levels ( trip and alarm) with individual time delays are available for ground fault detection. A trip Backup feature is also available as part of this function. The operational principal of Ground Fault Trip Backup is the same as of Short Circuit Trip Backup. Voltage and Frequency Protection Use the voltage and frequency protection functions to detect abnormal system voltage and frequency conditions, potentially hazardous to the motor. The following voltage elements are available: • Over and Undervoltage • Over and Underfrequency • Phase Reversal To avoid nuisance trips, the 469 can be set to block the undervoltage element when the bus that supplies power to the motor is de-energized, or under VT fuse failure conditions. Power Elements The following power elements are available in 469 relay. The first four elements have blocking provision during motor starting. Power Factor This element is used in synchronous motors applications to detect out-of-synchronism conditions. Reactive Power This element is used in applications where the reactive power limit is specified. Underpower Used to detect loss of load. Reverse Active Power Useful to detect conditions where the motor can become a generator. Overtorque This element is used to protect the driven load from mechanical breakage. Current Unbalance In addition to thermal model biasing current unbalance is available in the 469 relay as an independent element with 2 pickup levels and a built-in single phasing detection algorithm. RTD Protection The 469 has 12 programmable RTD inputs supporting 4 different types of RTD sensors. RTD inputs are normally used for monitoring stator, bearings, ambient temperature as well as other parts of the motor assembly that can be exposed to overheating. Each RTD input has 3 operational levels: alarm, high alarm and trip. The 469 also supports RTD trip voting and provides open/short RTD failure alarms. Additional and Special Features • Two speed motor protection. • Load averaging filter for cyclic load applications • Reduced voltage starting supervision. • Variable frequency filter allowing accurate sensing and calculation of the analog values in VFD applications. • Analog input differential calculation for dual drives applications. • Speed counter trip and alarm. • Universal digital counter trip and alarm. • Pulsing KWh and Kvarh output. • Trip coil supervision. • Drawout indicator, Setpoints Access and Test permit inputs.
