Routine tests, inspection plans, functional verification, factory acceptance testing and traceable release evidence for MV switchgear.
An interlock is proven by attempting the unsafe action under the exact prohibited condition. Positive tests show equipment can operate; negative tests show it cannot enter a hazardous state. Learning objectives Build a prohibited-transition matrix and test mechanical, electrical and…
Mechanical operation testing verifies that devices move, latch, indicate and interlock correctly through their declared positions. It should reproduce realistic sequences, not merely count operations. Learning objectives Test breakers and switching mechanisms, racking, shutters and indications with defined acceptance and…
Functional testing demonstrates that the implemented control scheme behaves correctly in allowed and prohibited states. It must test logic outcomes, not merely lamp operation. Learning objectives Create state-based scripts, verify local and remote commands and test failure conditions and restoration.…
Auxiliary dielectric verification checks wiring insulation and separation, but modern LVCs contain electronics that cannot withstand a blanket high-voltage test. The procedure must define included circuits and justified exclusions. Learning objectives Classify circuits, select the applicable test and protect incompatible…
Power-frequency withstand testing verifies dielectric integrity under a standardized AC stress. Correct level, duration, connection and treatment of attached equipment are essential to valid evidence. Learning objectives Prepare the main circuit, identify components requiring special treatment and execute a safe,…
Insulation resistance (IR) is a useful diagnostic for gross moisture, contamination or unintended connections. It is not the standardized proof of power-frequency or impulse withstand. Learning objectives Choose a safe test voltage, prepare circuits, interpret environmental effects and state the…
Main-circuit resistance testing detects poor joints, contacts and assembly errors. Results are meaningful only when current, test points, contact state and temperature are controlled. Learning objectives Select a suitable micro-ohm method, obtain repeatable values and investigate deviations without inventing a…
Continuity testing confirms that protective connections are present and have low resistance under the chosen method. It does not reproduce short-circuit current and cannot alone prove the rated thermal or mechanical withstand of the earth circuit. Learning objectives Define test…
Visual and dimensional inspection finds errors that electrical tests can miss: wrong components, blocked pressure paths, inaccessible terminals, sharp edges, label mismatches and cable-space conflicts. Learning objectives Create an objective inspection checklist tied to approved drawings and product evidence. Core…
Functional testing is unreliable when the design baseline is moving. A pre-FAT configuration review ensures that drawings, installed components, relay files and customer comments describe the same deliverable. Learning objectives Establish the test baseline, identify unresolved deviations and prevent results…
