What are the changes on the Micrologic trip unit performance when we install a LT Off Rating Plug?

When you use the LR off plug that means Ir = 1 and Tr = very far from standard times delay (near infinity). There is a direct relationship between load shedding and the long time delay protection so for this reason the load shedding will remain off too. You can replace it with the 3 alarms called Ia max, Ib max and Ic max, each alarm have to work in relationship with 3 contacts of the M6C. The power shedding feature is not affected if you install a LT Off Rating Plug

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