Description
The GE Multilin F650BFBF2G0HIE is an advanced digital bay controller mainly used for feeder management and bay control in power systems. Functional Features Comprehensive Protection Functions: It has functions such as overcurrent protection, directional elements, voltage protection, frequency elements, circuit breaker failure protection, automatic reclosing, and synchronism checking, providing all-round protection for power systems. For example, the overcurrent protection has multiple time curves, enabling it to adapt to different fault scenarios; the directional elements can judge the direction of different types of currents, improving the accuracy of protection. Multiple Setting Groups of Rated Values: There are three separate protection rated value setting groups stored in the non-volatile memory. Users can edit the setting values in the activated state internally or externally through contact inputs and communication, facilitating quick switching of protection rated values under different operating conditions. Flexible Input and Output Configuration: It allows the selection of 16 - 32 inputs and 8 - 16 outputs. The digital inputs can be customized and are equipped with individual debounce and vibration delay functions. The programmable "approximate analog" input allows the use of different voltage values in the same relay by setting threshold values, making it convenient to connect various types of sensors and actuators. Powerful Communication and Monitoring Capabilities: It supports multiple communication protocols such as IEC 61850, IEC 60870 - 5 - 103/104, etc., facilitating communication with other intelligent devices and system integration. It has a graphical human-machine interface, providing access to monitoring, measurement, and alarm screens. It also has functions such as event recording, waveform capture, and data recording, which are helpful for fault analysis and monitoring of the operating status of the system.
Technical Parameters Power Supply Voltage: The auxiliary voltage is 110 - 250 VDC (range 88 - 300 VDC), 120 - 230 VAC (range 96 - 250 VAC), enabling it to adapt to a wide range of voltage inputs and ensuring stable operation in different power system environments. Analog Input: The voltage analog input is 275 VAC, and the current analog input is 1 - 5 AAC, which can accurately measure voltage and current parameters in the power system. Maximum Contact Rating: 250 VAC, 16 A, which can meet the control and driving requirements of general electrical equipment.
Application Areas Power System Protection and Control: As a feeder protection relay, it can be used for primary protection or backup protection of feeders in solidly grounded, high-impedance grounded, or resonant grounded systems, achieving rapid protection and control of feeders and improving the reliability and stability of the power system. It can also be applied to busbar blocking/interlocking schemes, high-speed fault detection of arc short circuits, load transfer schemes, etc. Distributed Generation: It is suitable for the interconnection protection of distributed generation (DG), including active and passive anti-islanding protection, ensuring the safe and reliable connection of distributed power sources to the grid.
Common Faults and Solutions Communication Faults: These may be caused by poor communication cable connections, damaged communication interfaces, or incorrect communication parameter settings. Check whether the communication cable is properly plugged in and if there is any damage, repair or replace the cable if necessary; check whether the communication interface is loose or oxidized, clean or replace the interface if needed; confirm whether the communication parameters such as baud rate, data bits, stop bits, and parity check are matched with other devices, and reset the correct parameters. Abnormal Protection Functions: For example, the overcurrent protection malfunctions or fails to operate. Check whether the wiring of the current transformer (CT) is correct and whether the CT transformation ratio setting is consistent with the actual situation; check whether the overcurrent protection rated value setting is reasonable and whether the rated value needs to be adjusted due to changes in the operating mode; check whether the CT is saturated or faulty, and replace the CT if there are any problems. Display Abnormalities: Such as no display, blurred display, or garbled characters on the liquid crystal display (LCD). Check whether the power supply of the device is normal and ensure that the voltage is within the specified range; check whether there are signs of damage to the LCD screen, such as cracks or liquid leakage, and replace the screen if it is damaged; if there is a fault in the display driver circuit, professional technicians should be required to repair or replace the relevant circuit components.
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