Maxcon Instruments

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ELECTRICAL MACHINE TRAINER

Salient Features:

  • Facilitates easy & safe wiring by students due to 4 mm sturdy shrouded banana patch Cords.
  • Provided Short circuit and overload protection using Fuse/ MCB/CB/OL thermal relay.
  • Included Earth socket on control Trainer from student’s safety point of view.
  • The components fitted on the Panel are labelled with the name of the component.
  • All components are connected with internal wiring and provision for external wiring using shockproof patch cords.
  • Provided set of Instructor Guide & Student Workbook.
  • MS/ABS molded plastic sturdy enclosure & rust-free powder coated control panel.
  • Modular Panel with Colorful overlays showing circuit diagram & its connection tag numbers for easy understanding, connections & servicing by swapping at site.
  • MS/Aluminum profile sturdy flat panel (table top) system, carrying various high voltage components housed in plastic enclosures (panel) to minimize shock possibility.
  • Modular, multi machine/motor, multi experiment training system useful for visualizing & demonstrating the construction and functioning of different types of (Single phase and three phase) DC and AC Machines.
  • Trunnion mounted DC Integrated machine is used as Dynamometer for loading other machines (Motors / generators both), with facility to measure shaft power using electronic torque / speed measurement.
  • All machines are mounted on finely painted sturdy base frame with easy machine interchangeability, Use of screw less gear coupling/Love –Joy coupling facilitates.

Control Panel Technical Specifications:

EE1 – Three phase Power Supply panel:

  • MCB 4 pole, 4 Amp, 415V AC, 50Hz.
  • RYB power input Indicator (22 mm) x 3 Nos.
  • Volt meter 415V AC ( 72x72mm)

EE2 – Three Phase DOL Starter panel:

  • Contactor 9 Amp. 415V, 50 Hz, 3 Pole, 1 NO.
  • Contactor Coil: 230V, 11VA.
  • Bimetallic over load thermal Relay.
  • Relay Range 1.4A – 2.3A. (Set: 2.3 Amp.)
  • Start-Stop Push Button Switch.
  • DOL ON Red Indicator (22mm

EE3 A/B/C – Multi-function Bi-directional Power Measurement Panel (2 nos.):

  • Digital Bi-directional Multi-function meter (96X96mm).
  • 3 Phase 3/4 wire, Voltage line to line & line to neutral.
  • Measurement of 415V, 3 ph. & 230V, 1 ph. parameters.
  • Measures V, I, Hz, PF, KW, KVA, KVAr, Energy in KWh.
  • Current for all 3 ph. up to 5A. (Inbuilt CT 5A:5A x 3 Nos.)
  • LCD/LED display, Reverse Power Indication.
  • Supply 230VAC, 45-65Hz, 5W
  • Optionally PC interface with RS485 (Power Analyzer)

EE4 – FWD/REV, Manual Star- Delta Starter panel:

  • Three Ph. ON-OFF-ON with FWD/REV, 3 pole 3 way switch with center OFF, 6A/440V.
  • Star/Delta switch 3 pole, 3 way with Centre OFF, 6A/440V.
  • Starter ON & Power ON Red Indicator (22 mm each)

EE5 – ON OFF ON, FWD/REV Panel:

  • Three Ph. ON-OFF-ON with FWD/REV, 3 pole 3 way switch with Centre OFF, 6A/440V.
  • Power ON Red Indicator (22 mm)

EE6 – Rotor resistance Starter Panel:

  • Selector switch, 3 pole, 7 Way. 6A/440 V.
  • Rotor resistors of 30E/5A with 4 taps of 15E, 20E, 25E, 30E x 3 nos.
  • DC Rotor excitation over current circuit breaker (3 Amp)

EE7 – Single phase Power Supply Panel:

    • MCB 230V AC, 50Hz.1 pole/6A(3 Nos.) 1 pole/10A(1 No.)
    • Output Terminals: 230V, 6 Amp.(3 Nos.) & 10 Amp.(1No)
    • Red Power Indicator (22 mm), Lamp Holder.
    • 8A push button switch (Simulate as centrifugal switch) & Resistor 30E/400W. (Provide if Single ph. Ind. Motor supply)

EE8 A/B/C – SCR Based DC Variable Power Supply (3 nos.)

  • 230V AC Input, Output 0 to 195V DC, 5 Amp.
  • Full bridge SCR based, Cosine firing with linear charateristics.

for Armature, motor field & Alternator/generator field.

 

EE9 – Signal conditioning Cum Display panel:

  • Red Power Indicator (22 mm)
  • Multi channel Digital RPM & Torque Display.
  • Supports Sensor signal conditioning circuit for Speed, Torque in kg. to give output 0-2.5V DC (FS)

EE10 – DC Voltmeter & Ammeter panel:

  • Voltmeter: 0 to 300V DC (72x72mm)
  • Ammeter: 0 to 1A DC (72x72mm)
  • Polarity protection diode.
  • Circuit Breaker for over load protection.
  • Field failure relay to control Armature.

EE11 A/B – DC Voltmeter & Ammeter panel (2 nos.):

  • Voltmeter; 0 to 300V DC (72x72mm)
  • Ammeter: 0 to 5A DC (72x72mm)
  • Polarity protection diode.
  • Circuit Breaker for over load protection.

EE12 – Variable AC/DC Power Supply Panel:

  • 230V AC Input, 0 to 270V AC, 3Amp Output.
  • Diode Bridge AC to DC, 0 to 260V DC, 3Amp. Output
  • Full bridge Diode based.

EE13 – Single Phase AC/DC Resistive(R) Load Panel:

  • Selector switch, 2 pole, 7 Way. 10A/440 V.
  • Resistors 750E-600E-300E-212E-162E-100E-OFF. 400W / 7 Steps.
  • Separate 60E tap for DC series Gen. (if DC Series Gen. Supply)

EE14 – Three Phase Resistive(R) Load Panel:

  • Selector switch, 3 phase, 3 pole, 7 Way, 10A/440 V.
  • Resistors 10K-5K-3.5K-2.5K-2K-1.5K-OFF/200W, 7 Steps.

EE15 – Inductive (L) Load Panel:

  • Selector switch, 3 phase, 3 pole, 7 Way. 10A/440 V.
  • Inductors: 0.15H-0.3H-0.45H-0.6H-0.75H-1.5H-3H/400 mA, 7 Steps.

EE16 – Capacitive (C) Load Panel:

  • Selector switch, 1 Ph/3 phase, 3 pole, 7 Way. 10A/440 V.

Capacitive load =1mf-2mf-2.5mf-4mf-5mf-6mf-OFF, 7 Steps.

EE17 – Synchronizing/Paralleling Panel (Optional):

  • Synchroscope with LED Indications.
  • Three Lamps for Lamp Method experiment.
  • Synchronizing Switch, Synchroscope ON-OFF switch.

Accessories :

Patch Cord,
 Manual,
Dust Cover.

PC Interface & Software for data Acquisition (Optional):

  1. Data Acquisition using Modbus Serial RTU.
  2. Data Acquisition from Analog interface unit.
    • Speed, torque,
    • Voltages, currents,
    • Frequency,
    • Operating efficiency,
    • Active power
    • Reactive power
    • Power factor,
    • Calculated torque and slip etc.

        3. App has facility to monitor online data as DPM as well as Charts.

  1. Also can save data in PDF or Excel data as per student identification (Roll no., Name) also charts can be saved as Image file.
  2. Has facility to copy data to Removable device
  3. Application based Dual Arm® Cortex®-A72 microprocessor subsystem @ 2GHz with 7” LCD HDMI device
  4. USB /Serial interface, keyboard mouse.

Motor, Generator & Alternator Technical Specifications:-

Machine No. 1 – DC Integrated Machine – Trunnion mount, Dynamo type with torque & speed sensors.
Note: Machine Sr. No. 1 is Compulsory & following other machines are optional.

Volt: 180V Arm. & Field, HP: 0.5HP /2 Pole RPM: 1500RPM, Terminals: 6
Rotor: Standard commutator / brush arrangement with laminated stack, brought out on 2 terminals
Stator: Separately excited field winding with laminated solid yoke 2 pole and series winding brought out on 4 terminals.

Experiments List: I) Motors: Speed torque curves of a) Shunt motor, b) DC series motor, c) Separately excited DC motor d) DC compound motor (Cumulative & Differential)
II) Generator (Needs to be driven): V-I & Efficiency curves for –
a) DC Shunt generator b) DC series generator c) DC separately excited generator d) DC compound generator.
IV) Efficiency: All above type DC m/c.
Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.
Frame: 90, Shaft dia: 19 mm,
Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 45 Kg., Gross: 65 Kg.

Machine No. 2 – DC Motor/Generator (Optional with Above Machine No .1)
Volt: 180V Arm. & Field, HP: 0.5HP /2 Pole RPM: 1500RPM, Terminals: 6
Rotor: Standard commutator / brush arrangement with laminated stack, brought out on 2 terminals.
Stator: Separately excited field winding with laminated solid yoke 2 pole and series winding brought out on 4 terminals.

Experiments List: I) Motors: Speed torque curves of –

  1. a) Shunt motor, b) DC series motor, c) Separately excited DC motor d) DC compound motor (Cumulative & Differential)
  2. II) Generator: V-I & Efficiency curves for a) DC Shunt generator
  3. b) DC series generator c) DC separately excited generator
  4. d) DC compound generator.
  5. IV) Efficiency: All above DC m/c. (V, VI, VII) ?
  6. V) Swin burn’s test: Measurement of NO load losses to determine efficiency of DC shunt motor.
  7. VI) Hopkinson’s test: Back to back test on two identical DC shunt m/cs. (Needs 2 nos. of DC m/c to be coupled to each other)

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 3 – Single phase AC Cap. Start & Cap. Run Induction Motor. (Optional with Above Machine No .1)

Volt: 230VAC, 50Hz, HP: 0.5HP /4 Pole RPM: 1460, Terminals: 10

Rotor: Die-cast Squirrel cage.

Stator: Two windings brought out on 4 terminals for main & auxiliary these will be used to configure different motors split phase, CSCR CSIR.

Experiments List: Speed torque curves & Efficiency of –

  1. a) Split phase ind. motor, b) CSIR, Motor c) CSCR Motor.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 4 – Repulsion Motor (Optional with Above Machine No .1)

Volt: 230VAC, 50Hz, HP: 0.5HP /4 Pole RPM: 1500, Terminals: 2

Rotor: Standard commutator Brush but short circuited.

Stator: Stator brought out on 2 terminals settable handle to rotate brush position w.r.t Neutral axis.

Experiments List: a) Speed torque curves,

  1. b) Speed control & reversal with brush setting using handle to rotate brush position w.r.t Neutral axis.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 5 – Universal (AC/DC) Motor

(Optional with Above Machine No .1)

Volt: 230VAC/150V DC 50Hz, HP: 0.5HP /4 Pole RPM: 1600/1500, Terminals: 4

Rotor: Standard commutator Brush arrangement brought out on 2 terminals.

Stator: Stator brought out on 2 terminals to facilitate AC/DC operation & direction change Built in compensating winding to minimize AR & sparking.

Experiments List: Speed torque curves of universal Motor when operated with a) 220/240V AC, b) 150 V DC

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 6 – Three Phase Alternator (Optional with Above Machine No .1)

Volt: 415VAC, 50Hz, VA: 300 /4 Pole, RPM: 1500, Terminals: 6

Rotor:  Star connected 4 terminal including star point brought out on 4 slip rings mounted on shaft.

Stator: Separately excited field winding with laminated solid Yoke, 4 pole brought out on 2 terminals.

Experiments List:

1) Regulation of 3 phase alternator by – i) Synchronous Impedance Method, ii) ZPF or POTIER Method, iii) Actual Load Test.

2) Determination of sequence components Z0, Z1, Z2

3) Direct axis and Quadrature axis sub transient reactance Xd” & Xq”

4) Zero sequence reactance X0

5) Negative sequence reactance X2

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 7 – Three Phase Synchronous Motor(Optional with Above Machine No .1)

Volt: 415VAC, 50Hz, VA: 300 /4 Pole, RPM: 1500, Terminals: 5

Rotor:  Star connected 3 terminals brought out on 4 slip rings mounted on shaft.

Stator: Separately excited field winding with laminated solid Yoke, 4 pole brought out on 2 terminals.

Experiments List:

1) Speed torque curves of Synchronous motor.

2) Efficiency & input power factor measurement.

3) Use of synchronous motor as power factor improvement device.

 4) Study of V-curve & inverted ‘V’ curve.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 8 – Three Phase Slip Ring Induction Motor (Optional with Above Machine No .1)

Volt: 415VAC, 50Hz, HP: 0.5/4 Pole m/c, RPM: 1500, Terminals: 9

Rotor: Star connected 3 terminals brought out on slip rings mounted on shaft.

Stator: brought out on 6 terminals.

Experiments List: a) Speed torque curves of wound rotor induction motor with rotor shorted & with different rotor resistors.

  1. b) Efficiency measurement.
  2. c) DOL / Star-delta starter, rotor resistance starer.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg

Machine No. 9 – Three Phase Squirrel Cage Induction Motor (Optional with Above Machine No .1)

Volt: 415VAC, 50Hz, HP: 0.5 /4 Pole, RPM: 1460, Terminals: 3 (6 terminal Optional)

Rotor: Die-cast Squirrel cage rotor.

Experiments List:

  1. a) Speed torque curves of squirrel cage rotor induction motor.
  2. b) DOL starter.
  3. c) Efficiency of 3 phase AC Squirrel cage motor.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 10 – Three Phase Dahellander Winding Squirrel Cage Induction Motor (Optional with Above Machine No .1)

Volt: 415VAC, 50Hz, HP: 0.5 /4 Pole RPM: 1500/3000, Terminals: 6

Rotor: Die-cast Squirrel cage rotor.

Stator: 6 terminals brought out to run machine at two speeds using pole changing method (Dahellander Winding)

Experiments List:

  1. a) Speed torque curves of sq. cage rotor induction motor at two speeds,
  2. b) DOL stator.

c] Efficiency of 3 phase AC Squirrel cage motor.

Winding Temp: Embedded Thermistor brought out on 2 eyelets mounted on terminal box for monitoring winding temperature.

Frame: 90, Shaft dia: 19 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 38 Kg., Gross: 57 Kg.

Machine No. 11 – Shaded Pole Motor (Optional)

Volt: 230VAC, 50Hz, KW: 50W, 35F, RPM: 1400, Terminals: 2

Experiments List: Speed torque curves.

Frame: 35, Shaft dia: 14 mm, Mounting: Chassis mounted with spring balance brake pulley arrangement. Weight Net: 38 Kg., Gross: 57 Kg

Machine No. 12 – Eddy current Brake (Optional with Above Machine No .1)

Volt: 45V DC, Current: 3A, Power: 400W, Terminals: 2 nos.

Frame: 90, Shaft dia: 14 mm, Mounting: Chassis mounted with easily swappable gear coupling. Weight Net: 45 Kg., Gross: 65 Kg.