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277-120 transformer

I'm installing a stand-alone irrigation service for one 5HP centrifugal force motor, plus a irrigation clock. The service is 277/480 so I will be installing a 1KVA transformer, 277 primary 120 secondary for the clock. The branch circuit OLOC protection before transformer will be a fusible safety switch. Question is do a need OLOC protection on the secondary side to the clock.
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