The Current Limited Back Fuse（CL fuse） is used in transformers to protect and isolate faulted equipment. When connected in series with a low current primary protection device, such as Bay-O-Net fuse link, the CL fuse becomes an element of a two part protection system that gives a full range of fault protection.
This two-part system provides low current protection with the replaceable expulsion fuse . Together, the CL fuse coordinate easily with upstream and downstream devices.
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