study and implement three-phase motor feeder
TRANSCRIPT
Motor feeder bench
Study and implement
three-phase motor feeder
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Motor Feeder Bench
1. Presentation of the equipment
This equipment is designed to carry out exercises on implementation of three-phase direct motor feeder diagrams. Circuit voltage and current measurements can be taken in complete safety.
1.1 Composition
The motor feeder bench has two working surfaces that can be used at the same time.
One surface contains the automatic mode where only power is to be cabled, while the other surface contains the manual mode where all cabling is to be performed.
Each surface has a measurement and test station (voltmeter, ammeter, etc.) used to take measurements.
The power components are housed at the base of the bench:
− Asynchronous motors
− DC motors
− A rheostat with variable load
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Motor Feeder Bench
1.2 Data
Mechanical data
Height: 1350 mm; Width: 700 mm; Depth: 700 mm
Weight: approx. 190 kg
Electrical data
The bench is supplied by a three-phase 400 V electrical network with earth
Voltage: 400V three-phase ± 10 %
Frequency: 50/60 Hz ± 5 %
Current: 16 A, connection by 3P + earth socket
Power absorbed: 2 kVA
The conventional short-circuit current is fixed at 3 kA.
Rated surge withstand voltage: 2.5 kV
Electric shock protection class: l
Installation class: II
Measuring class: II
The electrical network must be fitted upstream of the equipment with an RCD (Residual Current Device) with a sensitivity of ≤ 30 mA class AC (not supplied).
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Motor Feeder Bench
Technical data of the main components
The motor feeder bench includes:
25A three-pole disconnector switch
25A disconnector switch :
− 9A 24V 50/60 Hz three-pole contactor
− 1 to 30 s time-delayed contact block
− 9A 24V 50/60 Hz changeover contactor
− 24V 50/60Hz Integral 18 three-pole circuit-breaker contactor
− 24V 50/60Hz TeSys U starter controller
0,75 kw 200/240V ALTISTART 01 progressive electronic decelerator-starter:
− 1,6A three-pole magnetic circuit-breaker
− 1 to 1,6A three-pole thermal magnetic circuit-breaker
Thermal relay: 1 to 1,6A
Transformers:
− Three-phase transformer: 400/230V 2 kVA
− Transformer 250 VA / P.230/400V / S.24V
Voltmeters: 0 – 600 V digital voltmeter
AC Ampermeters: 0 – 3A
DC Ampermeters: -3.0, +3A
DC motor: 280W 2.1A 170 V 1500 rpm
Asynchronous motor: 230/400V 0.18 kW 1.1A/0.64A
Load rheostat: RAC 30M 2 x 120 Ohms / 900W
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Motor Feeder Bench
1.3 Main functions
The two surfaces of the equipment represent three-phase direct motor feeder diagrams.
Safety bushes and components allow completely safe cabling.
The main components are as follows:
The protection components include disconnector, fuse and circuit-breaker.
The electric motor control components include direct contactor, changeover contactor, time-delay contactor, star delta connection and decelerator starter.
Measurements can be taken using the built-in voltmeters and ammeters. A rheostat is used to make load current vary in the DC generator.
The automatic mode offers five starting types:
− Direct starting
− Star-delta starting
− Changeover
− Tesys U or Integral 18 starter
− Electronic decelerator-starter
The manual mode offers the same starting types except that the control part must be cabled. The electronic decelerator-starter is not included in this mode.
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Motor Feeder Bench
2. Teaching
2.1 Presentation of teaching
The motor feeder bench equipment is used for:
Implementation of motor feeder diagrams.
Association of power control
Circuit voltage and current measurement
Calculation of the torques, powers and energies involved.
It is intended for the following channels:
Professional Secondary University Engineering schools
Automation – industria l computing
Electrotechnical
Technical equipment - Energy
Industria l maintenance
Automated product ion
Mechanical product ion
Exercises that can be carried out using the motor starter bench: they consist of a teacher's document with answers and a trainee document.
Exercise 1 "The three-phase asynchronous motor"
− Identify the main parameters of an asynchronous machine.
− Implement a motor feeder.
− Check the performance of the conversion system.
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Motor Feeder Bench
Exercise 2: "The contactor":
− Identify the control circuit characteristics.
− Implement a motor feeder: study focused on the control device.
− Check the performance on the control device.
Exercise 3: "Protection of motor feeders":
− Identify the equipment providing protection.
− Implement the various available protection devices.
− Validate the operating conditions of the various protection devices.
Exercise 4 "Starting of three-phase asynchronous motors" (example given on page 9):
− Choose a motor feeder according to the application (starting function).
− Implement the starter (direct with rotation direction reversal / star delta).
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Motor Feeder Bench
2.2 Teaching examples
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Motor Feeder Bench
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Motor Feeder Bench
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Motor Feeder Bench
3. Elements supplied with the equipment
3.1 Equipment supplied
A motor starter bench reference MD1AA540.
A set of safety flexes.
3.2 Equipment not supplied
Measurement instruments for exercises (multimeters, oscilloscope, measurement probe, etc.).
3.3 Documentation
The technical manual reference MD1AD541EN.
The exercise manual reference MD1AD542EN.
3.4 Details
Schneider Electric France Activité Didactique 3F 35 rue Joseph Monier CS 30323 92506 Rueil Malmaison - France http://www.schneider-electric.com/educationalequipments e-mail: [email protected]