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What is Maintenance Override Switch (MOS) ?

S Bharadwaj ReddyJanuary 19, 2019March 22, 2019

Maintenance Override Switch (MOS) shall be provided to override all field inputs designated to trip the facility in order to facilitate maintenance of field devices without interrupting the plant operation.

How to Do Logic Checks During Plant Pre-Commissioning

S Bharadwaj ReddyMarch 2, 2016April 9, 2019

Basic Guidelines to be followed during Logic Checks (Follow Cause & Effect, Control Narrative, P&ID and Latest Alarm & Trip Schedule): 1. Understand the Cause & Effect Matrix, if any

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