Electrical Lab Equipments

sno

Particulars

1

SCR,MOSFET,IGBT Characteristics unit Specification : Inbuilt power supply - 1.5 V to 35V, 1.5V to 15V /0.5A Provided Components of SCR, Mosfet, IGBT on board 22k, 100 k Potentiometers provided Manual & patch cards 0-50V   Digital Voltmeter 0-50 MA  Digital Milli Ammeter & 0-200 MA Digital Milli Ammeter

2

Gate Firing Circuit for SCR UJT Firing Unit This firing circuit Should generate two pulse Transformer isolated trigger pulse to trigger 2 SCR / Triac  connected in single phase half wave, full wave, half controlled converter and AC Phase control using 2 SCR's b.   Basic DC firing circuit unit This Unit Should consists of an SCR, Dc Supply of  10V, AC Supply of 10V and Variable DC Source Using Potentiometer for gate Supply R & RC Triggering  unit This Unit Should consists of an SCR, Ac Supply of  20V, other associated components required to study the Resistance triggering of SCR

3

Single phase AC Voltage controller  unit Specification : a.  Inbuilt 24-0-24V/2A Centre tapped transformer with 2 SCR’s & 1 Triac with firing pulse to trigger 2 Scars in anti parallel  or one Triac in single Phase AC Voltage Controller Configuration Manual & patch cards  Accessories Required : Rheostat - 50 Ohm / 2A Inductor - 150 mH/ 2A with tapings

4

Single Phase Fully Controlled  Bridge Converter with R & RL loads Single Phase Fully Control Bridge Converter power circuit unit (230V/5A) a. 4 SCR's and a Free Wheeling Diode b. all the necessary terminals should be brought out on front panel c. an MCB , Fuse Should be provided for input circuit d. Digital Voltmeter & ammeter to Measure output Voltage & current Single Phase  Bridge Converter Triggering unit This firing circuit Should generate 4 pulse Transformer isolated trigger pulse to trigger  SCR, test points Should be provided to study the Logic, and Firing angle Variation From 180 degrees to 0 degrees on a Graduated Scale. Accessories Required : a.  Rheostat - 50 Ohm / 5A b.  Inductor - 150 mH/ 5A with tapings Isolation transformer 1KVA 1:1 , 50 Hz, 230v with tapping

5

Forced Commutation Study unit ( Class A,B,C,D & E) a.  This unit Consists of  2  SCR's & 2 Diodes b. all the necessary terminals should be brought out on front panel c. an MCB , Fuse Should be provided for input circuit d. provided Firing Circuit  should have Variation  and Duty cycle e.Inbuilt DC Unregulated power supply of 24V/1A  Accessories Required : a. Rheostat - 50 Ohm / 2A

sno

particulars

1

Time Response of Second Order system Objective : To study time response of 2nd order  control systems Specifications : a. Square wave Generator – 1 KHz b. Damping Ratio Selector – 0-3 to 2.0 c. Second order system d. Built in power supply e. patch cards & manual

2

Characteristics of Synchros Synchro Transmitter To study zeroing of synchro transmitter b. measurement of stator voltage between winding S1 S2 S3 For different Position for rotor from 0 to 360 degrees B. Synchro Receiver a. To study zeroing of synchro transmitter b. along with the synchro transmitter the action of transmission And reception can be demonstrated

3

Programmable Logic controller (PLC Trainer) Study and Verification  of truth table of logic gates, simple boolean expressions and applications of speed control of motor Number of inputs : 8 Digital input ,24 VDC Number of Out puts : 4 Related output No of Analog out puts : 1 no Operating Voltage : 24 V DC Real time clock : Yes No of Counters :08 Power Supply : 24 v DC/3A Windows based ladder-Programming Software Display ,Key board on the front panel of the PLC

4

Effect of Feed back on DC Servo motor Objective  :   To Study principle of DC Servo Mechanism. Specifications : The Unit Consists Of 0-270 degree Command Potentiometer High Gin Power Amplifier 12V DC Servo motor Gain Adjustment Potentiometer to demonstrate the effect of hunting. Min Span & Max Span Adjustment Potentiometer

5

Transfer Function of DC Motor Objective : To Study principle of DC  motor Specifications : The Unit Consists DC Shunt motor 0.25HP/220V/1500 RPM Mechanical Loading Arrangement with Spring balance Digital Volt meter And Ammeter Digital RPM Indicator Patch Cards & Manual

6

Effect of P,PD,PI,PID Controller on Second order System Objective : To Study PID Section with variable Gain Proportional gain, derivative time constant and integral time Constant provide the control action Specification : The Unit Consists Square  Triangle Signal generator to study integral and derivative action Analog PID Controller Separate knobs to study the PID Second order System study the response of PID Built in Power Supply User Manual

7

Simulation of Transfer Functions using Op-Amp  Objective : To Study Different Transfer Functions of Op-Amp Circuits Specifications : a. Voltage Transfer Function Can be Simulated b. Transfer Function of Summer Amplifier c. Transfer Function of Integrator/Differentiator d. Transfer Function of Sub tractor e. Built in Power Supply