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Electrical Engineering Lab Equipment List: B.Tech Setup Guide for Engineering Colleges

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Introduction

Electrical engineering laboratories equip B.Tech students with hands-on experience in electrical machines, power systems, electronics, and instrumentation. This guide lists equipment for the core labs required under AICTE norms and university syllabi for 4-year B.Tech Electrical Engineering (EE) and Electrical and Electronics Engineering (EEE) programmes.

Basic Electrical Circuits Lab (Semester 1–2)

Equipment Specification Experiments
DC Power Supply 0–30V, 2A, dual channel Kirchhoff’s laws, Thevenin, Norton
Function Generator 1Hz–1MHz, sine/square/triangle RC, RL, RLC circuits
Digital Storage Oscilloscope (DSO) 100MHz, 2-channel Waveform analysis, phase measurement
Digital Multimeter 4½ digit, True RMS V, I, R, capacitance measurements
Bread Board Kits Full-size with jumper wires Circuit assembly and testing
Resistance Decade Box 1Ω–10MΩ Variable resistance experiments

Electrical Machines Lab (Semester 3–5)

DC Machines

Equipment Rating
DC Shunt Motor–Generator Set 3 kW / 5 HP, 220V DC
DC Series Motor Test Setup 1 kW, 220V DC
Rheostats (field and armature) Various ratings per motor
Loading Rheostat / Resistance Load Bank 5–10 kW
DC Ammeter and Voltmeter (panel type) Multi-range

AC Machines

Equipment Rating
3-Phase Induction Motor Test Rig 3 kW, 415V, 3-phase
Single-Phase Induction Motor Test Rig 0.5 kW, 230V
Alternator–DC Motor Set 5 kVA, 415V, 3-phase
3-Phase Transformer (Star–Delta, Delta–Star) 3 kVA, 415/415V
Single-Phase Transformer 1 kVA, 230/115V
3-Phase Wattmeter / Power Analyser Two-wattmeter method
Variac (Auto-transformer) 0–270V, 5A

Power Electronics Lab (Semester 5–6)

Equipment Purpose
SCR Firing Circuit Trainer Half-wave and full-wave rectifier control
Thyristor / SCR Characteristics Trainer V-I characteristics of SCR
MOSFET / IGBT Chopper Circuit Kit DC-DC converter experiment
Single-Phase Fully Controlled Rectifier Kit AC-DC conversion
PWM Inverter Trainer DC-AC conversion, SPWM technique
Isolation Transformer 2 kVA, safety for power electronics lab

Measurement and Instrumentation Lab (Semester 5–6)

Equipment Purpose
Wheatstone Bridge / Kelvin Bridge Trainer Resistance measurement
AC Bridges (Maxwell, Hay, Schering) Inductance and capacitance measurement
Cathode Ray Oscilloscope (CRO) Waveform observation, Lissajous patterns
LCR Meter Impedance measurement
Energy Meter Calibration Trainer Single-phase energy meter errors
Transducer Trainer Kit (Strain Gauge, LVDT, Thermocouple) Sensor characteristics and signal conditioning

Safety Equipment for Electrical Labs

  • Earth leakage circuit breakers (ELCB) on all benches
  • Rubber mats at all work positions (IS 5424)
  • Insulated gloves (Class 0, 1000V rated)
  • Fire extinguisher (CO₂ type), one per 50 sq.m.
  • First aid kit with burn treatment supplies
  • Isolation switches at each experimental bench

AICTE and NBA Compliance Notes

For NBA accreditation of EE/EEE programmes, ensure the machines lab has a minimum of one motor-generator set per 2 students for each experiment. Power analyser with harmonics analysis capability is increasingly required under the revised NBA 2024 criteria.

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    • Electrical Lab Equipment, Semester-Wise Breakdown

    Semester 1–2: Basic Electrical Engineering

    Equipment Specification Quantity
    Single-phase variac 0–270V AC, 5A 6 per section
    Three-phase power analyser True RMS, power factor, THD measurement 3
    Single-phase transformer (demonstration) 1 kVA, 230/110V, with tapped secondary 3
    DC motor-generator set 0.5 kW, separately excited, rheostat control 3
    Wattmeter (UPF and LPF) Low power factor type for reactive loads, 0–300V, 0–5A 6

    Semester 3–4: Electrical Machines Lab

    Equipment Specification
    DC compound motor with loading arrangement 0.5–1 kW, speed control by field rheostat, load: brake drum and spring balance
    Three-phase induction motor (squirrel cage) 0.5–1 kW, 3-phase 415V, DOL starter, speed control
    Three-phase synchronous generator 1 kVA, 3-phase, 415V, with DC excitation and prime mover
    Single-phase induction motor 0.25 kW, capacitor start, with loading arrangement
    Transformer (3-phase) 3 kVA, delta-star, for OC and SC test

    Power Electronics Lab

    • SCR (thyristor) firing circuit trainer, single-phase half and full wave control
    • AC/DC converter (rectifier) trainer, controlled and uncontrolled, with filter
    • DC-DC converter trainer, buck, boost, buck-boost converters
    • PWM inverter trainer, single-phase SPWM, LC output filter
    • IGBT/MOSFET driver board, gate drive circuit for high-power switching
    • Variable frequency drive (VFD) demonstration unit, 0.5 kW motor speed control

    Safety Requirements for Electrical Labs

    • Earth Leakage Circuit Breaker (ELCB) at all workstations, 30 mA trip current
    • Isolation transformer for each workstation, protects against shock
    • Rubber insulating mats at all working positions, IS 15652:2006 compliant
    • High-voltage warning signs, wherever voltages exceed 50V AC
    • Lock-out/tag-out (LOTO) procedure for all high-voltage equipment
    • Class C fire extinguisher (CO₂), rated for electrical fires
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