Shanghai Ruilei Power Automation Technology Co

The optical fiber cascade comprehensive protection device, in addition to the conventional current and voltage comprehensive protection functions, uses its unique function of directly exchanging information between devices through rrrb, and at the same time completes direct interlocking and control between different loops, completing Cascade protection function.
Common problems in the current distribution network system:
: When the secondary power room or user station fails, such as if it is close to the first-level power room, the setting value of the instantaneous current interruption in the first- and second-level power rooms is almost If the same, it may cause over-level tripping. The above problem can be fundamentally solved by using the cascade protection function
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Li Zheng
Chinese Company
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