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Electric Shock Rescue — सबसे Critical और अक्सर गलत किया जाता है। WRONG Action: Live Wire से Attached Worker को Directly Touch करना — Rescuer भी Shock में। CORRECT Sequence: (1) FIRST — Power Source OFF करें — Circuit Breaker, Isolator। (2) यदि Power OFF नहीं हो सकती: Non-conductive Object से Separate करें — Dry Wood, Plastic Rope, Rubber Hose। (3) Worker को Safe Area पर Move करें। (4) Assess — Conscious? Breathing? Heartbeat? (5) CPR + AED — Cardiac Arrest में। AED — Power Plant में Available होना चाहिए। (6) Ambulance 108 Call। (7) No Delay — Electric Shock में Internal Burns हो सकती हैं जो बाहर से नहीं दिखतीं। Hospital में Full Evaluation। HV Shock (11 kV+): HV से Separate करना = Impossible बिना Switching। HV Clearance तक Wait। Emergency Power Off Call करें।

यह Power Plants में बहुत Common Fatal Accident का Cause है। "Dead" Cable की Problem: (1) Incorrect Isolation — Wrong Cable Isolated। (2) Parallel Cable Induction — Nearby Live Cable से Electromagnetic Induction। (3) Back-feed — Load Side से Power Return। (4) Capacitive Coupling — HV System में। Induction Mechanism: Parallel HV Lines → Magnetic Field → Isolated Cable में Voltage Induce। 400 kV के Parallel — 100+ Volts Induced। "Dead" Cable = Touch = Electric Shock। Safe Practice: (1) EVERY Time — Voltage Test, Even if "Dead" Certificate है। (2) Portable Voltage Tester — IS Certified, Tested। (3) Short-circuit + Earth — Cable दोनों Ends पर। (4) Test Equipment — पहले Verify करें कि Tester काम कर रहा है। Rule: "If in Doubt — Don't Touch।"

Arc Flash Analysis — Power Plants में NFPA 70E और CEA की Requirement। Purpose: Arc Flash Event में Worker पर पड़ने वाली Incident Energy (cal/cm²) Calculate करना। Method: (1) Short Circuit Study — Fault Current Calculate। (2) Protective Device Coordination — Relay Settings, Fuse। (3) Arc Flash Calculation — IEEE 1584 Standard। (4) Results — Incident Energy, Arc Flash Boundary। (5) Labels — Every Panel, Switchgear, MCC पर। Steps in Power Plant: (1) Collect SLD — All Systems। (2) Equipment Data — Ratings, Impedances। (3) Software — SKM PowerTools, ETAP। (4) Calculate। (5) Labels Print और Apply। (6) PPE Selection — Category Based। Update When: (1) System Change — New Equipment। (2) Relay Resetting। (3) Normally Every 5 Years। Benefits: Worker को पता होता है कितने Cal/cm² का PPE चाहिए।

Earthing System — Electrical Safety का Foundation। Purpose: (1) Fault Current को Safe Path देना — Earth में। (2) Touch और Step Potential कम करना। (3) Protection Relay को Operate कराना — Fault Detect। (4) Lightning Energy को Earth में Dissipate। Poor Earthing Consequences: (1) Fault Current = Earth Path नहीं → Metallic Structure Energized → Touch = Shock। (2) Protection Relay Trip नहीं → Sustained Fault। (3) Equipment Damage — Insulation Failure। (4) Touch Potential — Dangerous। IS 3043 Requirements: (1) Earth Resistance < 0.5Ω — Power Plants। (2) Multiple Earth Electrodes — Mesh। (3) Earth Conductor Size — Fault Current × Duration। (4) Annual Test — Monsoon के बाद। (5) Visual Inspection — Quarterly। Warning Signs: (1) Equipment Body में Tingling — Poor Earth। (2) ELCB Frequent Tripping। (3) Motors Running Hot। Action: Annual Earth Resistance Test। Augment if > 0.5Ω।

Transformer Bushing Failure — Catastrophic HV Electrical Emergency। Signs of Bushing Failure: (1) Corona Discharge — Crackling Sound। (2) Oil Leak from Bushing। (3) Tracking Marks — Black Lines। (4) DGA — H₂ और C₂H₂ Spike। (5) IR — Drop in Insulation Resistance। Emergency Response: (1) Protection Relay — Should Trip Automatically। (2) Switchyard Evacuation — 400 kV Equipment। (3) Fire Suppression — AFFF System Activate। (4) Remote Oil Drain — If Fire। (5) Do NOT enter Switchyard — Ground Grid Voltage। Emergency Notification: (1) Control Room — Immediate। (2) Load Dispatch Center। (3) State Electricity Board। (4) CEA — Mandatory Report। Prevention: (1) Thermovision Survey — Annually। (2) DGA Monitoring — Monthly। (3) Bushing PF (Power Factor) Test — Annual। (4) Visual — Oil Level Check।

DCS/PLC Electrical Safety — Often Overlooked। Hazards: (1) ESD (Electrostatic Discharge) — PCB Damage। (2) Power Supply Units — Capacitor Energy। (3) Communication Cables — Induced Voltage। (4) UPS Systems — Stored Energy। (5) Signal Wiring — Not "Dead" — May have 24V-48V। Safe Practices: (1) Anti-static Wrist Strap — Before Touching PCB। (2) ESD Mat — Work Surface। (3) Power Off + UPS Off + Capacitor Wait — Before PCB Work। (4) Signal Cables — Check Voltage Before Touch। (5) Battery — UPS Battery Replacement — LOTO + Acid PPE। (6) Software Changes — Change Management। Specific Risks: (1) I/O Cards — 24V DC। (2) Servo Drives — 400-700V DC Bus। (3) Field Devices — 4-20mA Loops — Usually Safe। (4) BUT — Isolation Before Work — Always। Training: Control Room Technicians को Electrical Safety Specific Training — CEA Recommendation।

Night Shift Electrical Work — Additional Risks। Challenges: (1) Reduced Visibility — Shadows, Dark Areas। (2) Fatigue — Slower Reaction, Decision Making। (3) Fewer Personnel — Emergency Response Slow। (4) Supervision Gap — Night में Senior Staff कम। Specific Measures: (1) Task Lighting — 200 Lux Minimum for Electrical Work। Portable LED — Battery Backed। (2) Buddy System — Always Two Persons — HV Work में। (3) Communication — Radio। Check-in Every 30 Min। (4) Fatigue Assessment — Before Starting Night Work। (5) Extra Time — Don't Rush। Night पर Faster करना नहीं। (6) Area Barricading — Better Visibility Needed। (7) Arc Flash PPE — Double Check। (8) Emergency Contact — Posted at Work Location। Night Work Authorization: (1) Special PTW — Night Work Permission। (2) Control Room Active Monitoring। (3) Electrical Supervisor On-call — Throughout Night। AED Location: Every Worker को Night Shift में AED Location पता होना चाहिए।