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All inspections shall be done on the basis of approved ITP (Inspection Test Plan) which consists of the following sections;
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This is construction document on which basis construction work shall be performed at site.
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IEC 60079-14 is for Electrical Installations in Hazardous Areas and IEC 60079-17 is for Electrical Installations, Inspection and Maintenance.
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Power Control and Earthing Cables Installation, LV/MV Switchgear Installation, Transformer Installation, Power Distribution Boards Installation, UPS Panel and Battery Installation, Earthing System Installation, Lighting System Installation, Motors Solo Run & Installation check and CP System Installation etc.
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Lighting final installation shall be checked as per Typical Installation Detail Drawing and Lighting & Small Power layout drawing.
Also we have to check the existing inspection reports related to this activity like Cable Laying Inspection report, Cable IR/Continuity test report, Glanding & Termination inspection report.
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Cathodic Protection (CP) may be achieved in either of two ways.
By the use of an impressed current from an electrical source, or by the use of sacrificial anodes.
Also Read : Electrical Machines Questions
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The important points that we have to check during Motor Installation are as follows;
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Zone 0, 1 & 2 for Gases and vapours. Zone 20, 21 & 22 for Dust protection.
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It is surface temperature of a piece of electrical equipment.
With a temperature classification of T3, surface temp. of electrical equipment will not rise above 200 °C.
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Typical Instrument Installation drawing.
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Hookup drawing shall be used for Tubing Installation of any Instrument.
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Also following necessary documents shall be checked;
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Gas detectors (Flammable Gas Detector, Toxic Gas Detectors, Hydrogen Gas Detector), Flame detectors, Heat detectors, Smoke detectors, Beacons/Horns, Manual call points.
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MRIR: Material Receiving Inspection Report
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Analog I/O cards shall be used for Analog inputs like, RTD, Thermocouple etc. And Digital I/O cards are used for Digital inputs like Pressure switches etc.
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IP stands for Ingress Protection, IP classifies and rates the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures.
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We have to test the cable as following;
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We have to note the following readings;
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Accuracy is the term used to describe the degree of conformity of a measured or calculated value to its actual or specified value.
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The calibration Span is defined as Upper Range Value (URV) minus Lower Range Value (LRV).
For Zero-based instruments, % Span is also known as % of Full Scale (% FS).
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The difference between values indicated by an instrument and those that are actual.
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Regards
Thank you for the information
I am long time Inspector and it really refresh me in some terms. Really excellent Q&A. Very informative. Thanks to the author.
I want to contact with you, how i can contact with you
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this is very helpful about QA/QC thanks dear sir please upload more about instrument QA/QC Questions & answers
Very Useful information
in Instrumentation question no:4, further we have to check following point also
7. Calibration Report
8. Hydro / Pneumatic test report for Hook up Impulse Piping / Tubing
9. Loop checking Report
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Very informative
Thanks
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Thank you very much for information