Busbar protection device
REB670 Busbar protection device 1MRK002820-AC
REB670 Busbar protection device 1MRK002820-AC
Second-hand dismantling machine
REB670 Intelligent microcomputer protection device is known for flexibility of application. It is specially designed for the protection and monitoring of power system busbars, T-connected lines and branch lines, and has a wide range of applications from medium voltage to ultra-high voltage. Its expandable input and output hardware modules enable the REB670 to meet the need for differential protection in a variety of wiring formats including single bus, double bus with or without side bus, double circuit breaker and one and a half circuit breaker.
REB670 achieves the perfect combination of speed and stability, which is particularly important for busbar protection. For most regional faults, REB670 can operate in a very short time, typically 12ms, regardless of the number of intervals connected on the bus. At the same time, for out-of-area faults, even if the CT is heavily saturated, it can still ensure extremely stable. Due to its unique measurement principle, the REB670 device requires less master CT than other digital differential protection devices and can share a set of CT with other protection devices, thus effectively reducing costs. As long as CT is not saturated within 2ms in a cycle, REB670 ensures stable and correct action. At the same time, REB670 is extremely sensitive to faults in the area, protecting your electrical installations from all kinds of damage and reducing repair time accordingly. In addition, REB670 can quickly detect and correctly remove a variety of developmental or transformational faults.
REB670 Busbar protection device 1MRK002820-AC
Buy and use
REB670 is pre-configured with various functions and logic, type tested and default parameters, so that the product is easy to order, easy to set, fast to debug, and reliable operation. The REB670 is available in three different full-function configurations, including three-phase and split-phase configurations. REB670 is suitable for mother-difference protection from 4 to 24 sets of CT inputs, with two sections of low-impedance differential protection per unit and bus-protected area selection. Using the debugging software PCM600’s graphical editor, the preconfigured REB670 can be easily and intuitively reconfigured to meet specific busbar protection requirements.
peculiarity
• Fully compliant with IEC 61850 standards
• Integration of monitoring and protection functions
• Comprehensive self-test capabilities, including analog channel self-test
• Six independent parameter setting groups
• Switch and analog signal matrix, easy to set
• Ethernet interface for quick and easy communication with PC
• Large screen man-machine interface, you can browse the connection between each interval and the bus and the status of the primary device online
• Pre-configured solutions with default tuning through type testing can be used to:
– Single bus connection, 1 1/2 circuit breaker connection, double bus connection
– Double bus and single circuit breaker
• User management and permission Settings
Main protection function
• Two bus differential protection action areas
– Sensitive differential protection action characteristics
– Automatic monitoring of current loop break and selective blocking of corresponding busbar protection
– Super fast action
– High stability against out-of-area faults
– Correctly reflect various types of conversion and developmental failures
• Large differential protection features
• Built-in software to automatically select the bus measurement area (corresponding to the isolation switch position)
• Circuit breaker failure protection
• Selective trip outlet for busbar protection and circuit breaker failure protection
• Four sections of directional overcurrent protection with fixed or inverse time characteristics
• Automatic reclosing function for delayed recovery after busbar protection action
• Programmable logic function module
• Support external auxiliary CT and current input
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