Electrical Grid Training Module 9A | Automatic Voltage Regulator AVR Commissioning

Electrical Grid Training Module 9A covers Automatic Voltage Regulator (AVR) testing and commissioning from control-panel checks to digital-voltmeter scaling. This lesson explains safe secondary injection, OLTC command control, traceable settings, SCADA evidence and final restoration. TOPICS COVERED • AVR prerequisite inspection and accepted PT/CT signal readiness • PT and CT phase-sequence verification at the AVR reference inputs • Local/Remote and Auto/Manual raise/lower interlocks • Tap-position correlation between local indication, AVR panel and SCADA • OLTC operation blocking, AVC delay and tap-change-in-progress indication • Relay I/O mapping, LED descriptions and approved setting-file checks • Bandwidth raise/lower pickup values and primary/secondary calculations • T1 inverse-time, T2 definite-time and runback-voltage timing • Under-voltage blocking, over-voltage alarm and over-current blocking • Out-of-voltage timer, raise/lower pulse duration and command blocking • Digital-voltmeter selector/test switch and scaling verification • Test sheets, setting files, screenshots, calculations and witness sign-off VIDEO CHAPTERS 00:00 Module 9 overview and AVR commissioning scope 00:27 Standards and reference governance 01:26 AVR control-panel scheme and function test 03:39 Relay configuration, bandwidth and timer 06:06 Blocking-protection function tests 08:19 Digital-voltmeter scaling and selector test CORE ACCEPTANCE RULE No approved reference, no test. No accepted PT/CT and OLTC prerequisites, no AVR function test. No controlled secondary injection, no result. No blocked unintended tap command and verified restoration, no release. No complete evidence package, no closure. INTENDED AUDIENCE Commissioning, transformer and protection/control engineers, substation test teams, utility and OEM specialists, SCADA engineers, QA/QC teams, contractors, operators and technical trainees. SAFETY NOTICE This video is for professional training only. AVR, OLTC and control-circuit testing can initiate transformer tap changes or affect regulated voltage. Only authorized and competent personnel may isolate PT/CT inputs, access AVR or relay test blocks, inject secondary voltage/current, operate raise/lower commands, change Auto/Manual or Local/Remote modes, test blocking functions, simulate alarms, or work inside control panels. Confirm the test boundary, control authority, trip/command blocking, phase reference, DC/AC supply condition and communication with operations. Prevent backfeed and unintended tap movement. After testing, remove injection, restore test blocks, approved settings, selector positions, pulse times, alarm paths, SCADA points and the required final tap position. Follow approved procedures, permits, risk assessments, OEM instructions, LOTO and the switching authority. Project-specific bandwidths, timers, blocking thresholds, pulse durations, tap limits and voltage tolerances always govern. Subscribe for the complete 18-module Electrical Grid Testing and Commissioning series. #AVR #Commissioning #ElectricalGrid