Novel Instruments

Objectives:

To study AC Phase Control Circuits in 4types.

Specifications :

Isolated 230 V/40 W AC Power supply.
Halfwave phase control using RC Triggered circuit & SCR circuit.
Fullwave phase control using pulse Transformer & UJT circuit.
Set of patch chords & manual.
UJT Triggered SCR Fullwave control circuit.
Fullwave phase control using RC triggered circuit & TRIAC circuit.
40 W Lamp Load.

Objectives:

To study Inverter using SCR.

Specifications

Isolated +250 V/40 W DC power supply.
10:1 ON-board Rrsistive Attenuator.
Set of patch chords & manual.
Gate firing circuit.
40 W Lamp Load.

Objectives:

To study JONES & MORGANS choppers.

Specifications:

Isolated +250 V/40 W DC power supply.
SCR JONES chopper.
Gate firing pulses for JONES chopper.
Gate firing pulses for MORGANS chopper.
10:1 ON-board Resistive Attenuator.
+ 5 V/350 mA DC power supply.
SCR MORGANS chopper.
40 W Lamp Load.
Set of patch chords & manual.

Objectives:

To study Time Delay Circuit Using UJT & SCR.

Specifications :

Isolated 230 V/40 W AC power supply.
SCR, UJT Relaxation oscillator.
10:1 On-borad Resistive Attenuator.
Set of patch chords & manual.
Diode bridge rectifier.
Different time constants.
40 W Lamp Load.

Objectives:

To study SCR Turn On Methods .

Specifications:

Isolated 230 V/40 W AC power supply.
0-18 V/350 mA,50 Hz, AC power supply.
Synchronus AC gate control signal through DIAC.
Set of patch chords & manual.
UJT Triggering.
1.2 V TO + 15 V/350 mA DC power supply.
Variable frequency triggering pulses.
DC gate signal control.
40 W Lamp Load.

Objectives:

To study Speed Control of DC Motor Using SCR(Open Loop &Closed Loop)

Specifications:

Isolated 230 V/50 Hz,40 W AC power supply.
Zero crossing detector.
Comparator.
Pulse formation circuit.
Current & speed feedback loop.
SCR firing circuit.
+/- 12 V/350 mA DC power supply.
Ramp generator.
High frequency modulator.
Gate firing circuit.
Speed sensor.(DC TACHO GENERATOR PRINCIPLE)
Set of patch chords & manual.

Objectives:

To study Fan Regulator & Lamp Dimmer Using DIAC& TRIAC/SCR .

Specifications:

Isolated 230 V/50 Hz,40 W AC power supply.
10:1 On-borad Resistive Attenuator.
TRIAC phase angle control
Set of patch chords & manual

Objectives:

To study SCR Control For DC & AC Loads

Specifications :

Isolated 230 V/50 Hz,40 W AC power supply.
Bridge rectifire circuit.
AC & DC Load (40 W) provision.
SCR phase angle control.
10:1 On-borad Resistive Attenuator.
Set of patch chords & manual.

Objectives:

To study SCR Characteristics .

Specifications :

Dual 1.2 V TO 15 V/350 mA DC power supply.
To conduct biased gate SCR firing experiments.
To conduct SCR shorted gate experimental.
Set of patch chords & manual.

Objectives:

To study DIAC Characteristics .

Specifications :

1.2 V TO 50 V/350 mA DC power supply.
Forward & Reverse biased characterstics of DIAC.
36 V rms AC power supply.
Set of patch chords & manual.

Objectives:

To study TRIAC Characteristics .

Specifications :

Dual 1.2 V TO 15 V/350 mA DC power supply.
TRIAC firing Characteristics .
TRIAC shorted gate & biased gate Characteristics.
Set of patch chords & manual.

Objectives:

To study UJT Characteristics & UJT Relaxation Oscillator .

Specifications:

1.2 V TO 50 V/350 mA DC power supply.
Study of UJT Characteristics & Study of UJT Relaxation oscillator.
Set of patch chords & manual.

Objectives:

To study MOSFET Characteristics .

Specifications :

+1.2 V TO 50 V/350 mA DC power supply.
To study transfer characterstics and output characterstics.
Set of patch chords & manual.

Objectives:

To study IGBT Characteristics .

Specifications:

+1.2 V TO 50 V/350 mA DC power supply.
To study transfer characterstics and output characterstics.
Set of patch chords & manual.

Objectives:

To study Power Device Characteristics.

Specifications:

SCR T4N612 - 1.
DIAC D324 - 1 .
IGBT BU402 - 1 .
UJT 2N2646 - 1.
Diode IN4007 - 9.
Transformer 0-60V,0-15V - 1.
Potentiometer- 10K/2,5K/1.
Long - 4 .
TRIAC ST44 - 1.
MOSFET IRF840 - 1.
BJT : TIP 122 - 1.
Zener diodes 1N4764 (20V) - 2.
Transformer 18-0-18V - 1.
Resistors 50W, 10W/2, 1K, 10W/1 470W, 5W/1 - 7.
Patch chords 2mm TO 2mm - 6 Nos .
Short- 2.

Objectives:

To study Gate Firing Circuits for SCR.

Specifications :

RC trigger circuit-half wave phase control with limited range.
RC trigger circuit-full range full wave control.
UJT trigger circuit -inaverse parallel SCR's resistance controlled ramp.
UJT trigger circuit sereis transistor controlled ramp.
UJT trigger circuit resistance controlled pedestal with linear ramp.
Built in variable power supply 1.5 TO 30V
Isolation on transformer 230/230V, 100W. seperate unit.
RC trigger circuit - full range half wave control.
UJT trigger circuit SCR in bridge-resistance controlled ramp-full wave control.
UJT trigger circuit half controlled bridge - resistance controlled ramp.
UJT trigger circuit shift transistor controlled pedestal..
UJT trigger circuit-resistance controlled pedestal with cosine modified ramp.
SET OF 2mm patch chords - 10Nos.
User manual.

Objectives:

To study the single phase half & fully controlled bridge converter for R L C Loads

Specifications :

Low Voltage AC Supply - 32V, 50Hz.
Half Bridge : Diodes IN 4007 - 2 Nos.
SCR 106 D - 2 Nos.
UJT 2N 26 40 - 1 Nos.
Resistors : 33K/ 2W, 15K/2W, 22E/2W (2), 33/2W(2).
Capacitors : 0.22/10V, 0.1/100V mfd (2).
Zener : 4.7V/1W (2), 20V/2W (1).
RLC Loads 500 Ohms, 1H, 1uV.
Full Bridge : 106 D 4 Nos.
Gating firing circuits : SCR 106D - 2 Nos,UJT 2N 26 40 - 1 Nos.
Patch Chords (4mm - 4mm) - 12 Nos (6 Long, 6 Short).
Potentiometers : 470 K/1W .
Pulse Transformers : 1:1:1 - Nos.
Diodes IN 4007 - 3 Nos.

Objectives:

To convert and study the 50HZ frequency to its sub harmonics harmonic frequencies 25Hz,16.66Hz,12.5Hz.

Specifications:

SCR 106D 4 Nos.
Pulse Transformer 1:1:1 4 Nos.
Transformer 30V-0-30V, 0-9V, 9-0-9V 1 Nos.
Capacitors 6 Nos.
ICS -7408 - 2 NOS, 74198, 74121,LM 3900, 7400, 27512, 7805 .
Transistor CL 100 -4 Nos.
Diodes 1N4007- 8 Nos.
Resistors -15 Nos.
Patch chords 2mm TO 2mm -10 Nos.
User manual -1 Nos.

Objectives:

To study the Half and Full Controlled bridge rectifier using SCRS for A 3 phase input.

Specifications :

SCR 106 D 3 Nos.
Step down transformers 230/55V 3 Nos.
Current sensing resistor 1E / 5 W 2 Nos.
Resistors 47,1W/5,2.7K, 2W/1
patch chords 2mm TO 2mm - SHORT 10 Nos.-LONG 4 Nos.
Diodes IN 540 7 Nos.
Attenuator for oscilloscope 1:34
Pulse generator circuit UJT 2N2646 - 3,DIODE IN4007 - 3
Potentiometer- 5K 1W/1
User manual -1 No.

Objectives:

To study five types of forced commutations of SCR along with a setup for JONES chopper.

Specifications:

SCR 106 D 7 Nos
Ferrite cored inductors 1250 MH 2 Nos.
Resistors: 1K, 2W/1, 2K/2, 220/250, 10W/2, 47W/2, 560K/2
4MM to 4MM patch chords: 12 NOS, Long -8,Short- 4.
FTO SCR inverter grade type 2162 1 No.
Iron cored inductor 1 H 1 Ns .
Capacitor bank : 0.1(100V)/40.22(100V)/1, 0.47, (100V)/1, 1MF(100V)/1 ,3/3.3MF/100V/1,6.8MF 100V/1.
User manual -1 No.

Objectives:

The inverter circuit consist of a transformer with a center tapped primary connected to two SCR's driven by two pulse transformers connected to UJT's. Independent L,C,R loads are provided for loading the inverter to study the resulting wave forms.

Specifications:

SCR T 2162/106D - 1 NO
Power diodes RTF - 20 - 1 No
Capacitors 4MF,0.047/1 (40V) - 2 Nos
Inductive load 1.75H - 2 Nos
Resistive load 4.7K,10W - 4 Nos
Power transformer 230V-PRIMARY 18 - 0- 18V SEC @ 1A - 1 No .
Patch chords 2mm - 2mm - 6 NOS LONG - 4 SMALL - 2.
1:34 attenuator for oscilloscope - 1 No
External power supply required to conduct the experiment - 0-30V@1A - 1 No .
Diodes - IN4007, PFR 852 - 2 Nos.
Inductors 3.5H,250 MH - 2 Nos
Resistors 220W,5W,1K.1/4W/3,0.1E,5W/2 - 5 Nos.
Capacitive load 0.01MF (400V) - 2 Nos .
Potentiometer 5K,1W - 1 No.
IC 555 timer - 1 No .
Zener diode - 10V/1W - 1 No
User manual - 1 No

Objectives:

To Study the SCR Series Inverter with R&RL Loads.

Specifications :

SCR T 2162/106D - 1 No.
Power diodes RTF - 20 - 1 No.
Capacitors 4MF,0.047/1 (40V) - 2 Nos.
Inductive Load 1.75H - 2 Nos.
Resistive Load 4.7K,10W - 4 Nos.
Power Transformer 230V-Primary 18 - 0- 18V sec @ 1A - 1 No .
Patch chords 2mm - 2mm - 6 NOS long- 4 small - 2.
1:34 Attenuator for oscilloscope - 1 No .
External power supply required to conduct the experiment - 0-30V@1A - 1No.
Diodes - IN4007, PFR 852 - 2 Nos.
Inductors 3.5H,250 MH - 2 Nos.
Resistors 220W,5W,1K.1/4W/3,0.1E,5W/2 - 5 Nos.
Capacitive load 0.01MF (400V) - 2 Nos.
Potentiometer 5K,1W - 1 No.
IC 555 Timer - 1 No.
Zenor diode - 10V/1W - 1 No.
User manual - 1 No.

Objectives:

To Study of Single Phase AC Voltage Controller with R & RL Loads .

Specifications :

SCR 106D 8.
Transistors BC 107 11.
BC 177 1.
Diodes- IN4007 20.
TIP 122 1.
Potentiometers 2.
IC 755 1.
Zener diodes 20 V 2, 10 V 1 , 4.7 V 1.
Attenuator for oscilloscope - 1:34.
An additional auto transformer 0-270V @ 2A is needed to simulate the line input variations.

Objectives:

To Study Resistive Loads/1 Phase / 230v/10a/2.5kw/10 Steps .

Specifications:

Fabricated NGLE iron frame.
Wirewound resistors.
Step controlled by rotary switches.