MR251E Experimental Panel Industrial Installations(Contactors and Switches) Vocational Education Equipment For School Lab Electrical Automatic Trainer
INTRODUCTION
This Panel, complete with switches and electromagnetic devices, is the main unit for the practical learning of cabled direct and sequenced starting of single and 3-ph AC motors. The control (or command) circuits work with 24 VAC ; the power circuits work with mains at 230 or 400 V; both power supplies are independent and protected with automatic thermomagnetic switches. This design allow to test fi rst the command circuit, and later the power circuits. The panel, made of insulation material, includes the international symbols of all the devices. The connections are done in an easy and fast way via cables (supplied) with 4 mm safety terminals. Not any tool is required for the development of the exercises. To perform the exercises in a “realistic” way, different types of AC motors and starting devices are supplied. The panel can be used in different positions over the table, according to the client requirements of service and room.
TRAINING PROGRAM
Control of a contactor: start, stop and jogging.
Independent control of two contactors.
Starting of a 3-ph squirrel cage motor with contactor.
Forward and reverse starting of a 3-ph squirrel cage motor, with pushbuttons lock, with limit switches, proximity switches, capacitive switches, with timer.
Star-delta starting of a 3-ph squirrel cage motor, manual and contactors circuits.
Stator resistance starting of a 3-ph asynchronous motor.
Rotor resistance starting of a 3-ph slip-ring asynchronous Motor.
Contactor circuits for controling a 3-ph 2-windings and Dahlander motors.
Counter-current braking of a 3-ph squirrel cage motor.
Sequenced-starting of 3-ph asynchronous motors.
Single-ph motor starting and reversing contactors circuits
Starting and reversing a 3-ph squirrel cage motor with drum switch (reverser).
Y/D starting and reversing of a 3-ph squirrel cage motor with Y/D drum switch.
3-ph Dahlander motor starting with changeover switch.
Two-windings asynchronous motor starting with changeover switch.
Single-ph motor starting with manual switch.
TECHNICAL SPECIFICATIONS
Painted metal structure with wide front panel made of insulation material
Fast connections with 4 mm safety cables and jumpers
1 3-poles In 16 A - 400 VAC reversing switch
1 Y/D In 16 A - 400 VAC starter-reversing switch
1 Poles changeover switch for Dahlander motor, In 16 A - 400 VAC
1 Poles changeover switch for two-windings motor, 16 A - 400 VAC
1 3-poles thermomagnetic switch, with adjustable In 1,6-2,4
A with NO / NC auxiliary contact.
1 3-poles thermomagnetic switch, with adjustable In 1-1,6 A with NO / NC auxiliary contact.
4 3-poles 25 A contactor, coil 24 VAC, with 2NO+ 2 NC
auxiliary contacts
2 mechanical interlocks, mountable/demountable, to be used between 2 contactors.
1 red emergency pushbutton, 2 NC contacts
2 green leveled start pushbuttons with NO & NC auxiliary contacts
2 red protruding stop pushbuttons with NO & NC auxiliary
contacts
4 monoblock 24 V LED pilot lamps, several colors.
2 multifunction multiscale timers TON, TOFF, PULSE, 0,1 s to 10 h
2 limit switches, with NO & NC auxiliary contacts
1 inductive sensor, 24 VDC, relay interface output with changeover contact.
1 capacitive sensor, 24 VDC, relay interface output with changeover contact.
1 single-pole C 3 A automatic thermomagnetic switch.
1 4-pole C 6 A automatic thermomagnetic switch.
1 single-ph transformer 115-230 / 24 V – 96 VA
1 panel socket 3P +N + G
3 m cable 5 x 1,5 mm2 with socket and plug, 5 poles, IEC 309 type.
1 panel feeding socket 2P + G
1 single-ph feeding cable 3 x 0,75 mm2 with French-German type socket.
Set of 70 cables with 4 mm safety terminals
Dimensions: 800 x 520 x 100 mm
Weight: 22 kg
SUPPLIED ACCESSORIES
Set of 70 cables with safety plugs (Ø 4 mm)
Optional spare parts for doing experiments
Three-phase asynchronous cage motor 230/400 V – 500 W 2 poles
Three-phase asynchronous cage motor 400/690 V – 500 W 2 poles
Three-phase asynchronous wound-rotor motor 230/400 V – 500 W 2 poles
Three-phase asynchronous “Dahlander” cage motor 400 V – 500-350 W 2-4 poles
Three-phase asynchronous two-winding cage motor 400 V – 500-200 W 2-6 poles
Single-phase asynchronous motor with starting capacitor 230 V – 500 W 2 poles
2-step stator and rotor starting rheostat – 3 x (50 Ω - 500 W)
Three-phase autotransformer for starting three-phase motor – 500 W
Inertial fl ywheel for “M”series motors
Three-phase asynchronous cage motor 230/400 V – 1000 W 2 poles
Three-phase asynchronous cage motor 400/690 V – 1000 W 2 poles
Three-phase asynchronous wound-rotor motor 230/400 V – 1000 W 2 poles
Three-phase asynchronous “Dahlander” cage motor 400 V – 1000-700 W 2-4 poles
