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BASICS OF TRIPS, INTERLOCKS, PERMISSIVES & SEQUENCES

S Bharadwaj Reddy
This post provides information about basics of Trip, Interlock, Permissive and Sequences which are regularly used in instrumentation control systems like ESD, DCS, PLC etc. Trip: The term Trip refers to an action that

SIS Sensors

S Bharadwaj Reddy
Perhaps the simplest form of sensor providing process information for a safety instrumented function is a process switch. Examples of process switches include temperature switches, pressure switches, level switches, and

Safety Instrumented System Interview Questions and Answers

S Bharadwaj Reddy
Read the following Safety Instrumented System Interview Questions and Answers useful for interview preparation. Safety Instrumented Systems must be independent from all other control systems that control the same equipment in

Basics of Wellhead Control Panel (WHCP)

S Bharadwaj Reddy
WHCP: Wellhead Control Panel WHCPs are also known as Shutdown Panels (SDP), Emergency Shutdown Systems (ESD) or Hydraulic Safety Shutdown System (HSSS). These are failsafe shutdown systems which have pneumatic/hydraulic/electric components;

Safety Instrumented System Engineer Interview Questions

S Bharadwaj Reddy
A SIS is engineered to perform “specific control functions” to failsafe or maintain safe operation of a process when unacceptable or dangerous conditions occur. Safety Instrumented Systems must be independent

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