E 2.1.1.2 Transformatory trójfazowe

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Opis

The experiments are carried out using the STE plug-in system Electricity/Electronics.

Objectives

  • Recognition of basic physical principles
  • Implementation of electrical circuits according to circuit diagrams

Understanding three-phase transformers is one of the key requirements for working with three-phase loads. Three-phase transformers are AC transformers enhanced to handle three-phase current. The primary and secondary windings are provided with six terminals in each case. The vector group determines how the windings are connected, e.g. in a delta-star circuit. Knowledge of such vector groups is important for running multiple three-phase transformers simultaneously.

The equipment set incorporates student experiments which can be carried out in a laboratory safely using safety extra-low voltage. Experiment instructions are contained in a manual in either printed or digital form.

The target group is made up of students in general or vocational education. The experiments are designed as an introduction at a simple level of understanding.

For introductory and more advanced work, the following sets are recommended:

  • E2.1.1.1 Electromagnetism & induction
  • E2.1.1.3 Three-phase rectification
  • E2.1.1.4 Generators and motors

Topics

  • Fundamentals of three-phase technology
  • Star configuration
  • Delta configuration
  • Measurement of voltage using multimeters and oscilloscopes
  • Root-mean-square and peak values
  • Phase-to-phase and line-to-line voltages
  • Use of an oscilloscope in a three-phase system
  • Measurement of current using a multimeter
  • Determination of phase and generator power
  • Delta circuits
  • Connection of three-phase transformers in Yy configuration
  • Quoting the vector group for transformers of different designs
  • Connection of three-phase transformers in Dy configuration
  • Connection of three-phase transformers in Yd configuration
  • Connection of three-phase transformers in interconnected star (zig-zag) configuration
  • Three-phase transformer without load
  • Symmetrical load
  • Asymmetric load between two live conductors
  • Asymmetric load between live and neutral conductors
  • Voltage transformation without a load
  • Power for three-phase loads
  • Phase shift without load between primary and secondary windings
727 514 Basic set T 2.4.1, STE 1
576 74   Plug-in board, DIN A4, STE 1
578 795   Three-phase voltage supply, 3×12 V, STE 6/100 1
562 791   Plug-in power supply, 12 V AC 1
501 641   Two-way adapters, red, set of 6 3
524 013S   Sensor-CASSY 2 Starter 1
575 213   * Oscilloscope 40 MHz, two-channel, analogous 1
575 231   * Probe 100 MHz, 1:1 / 10:1 2
531 282   * Multimeter Metrahit Pro 2
501 23   Connecting lead, 32 A, 25 cm, black 9
501 28   Connecting lead, 32 A, 50 cm, black 6
501 26   Connecting lead, 32 A, 50 cm, blue 2
501 30   Connecting lead, 32 A, 100 cm, red 2
501 33   Connecting lead, 32 A, 100 cm, black 2
501 48   Bridging plugs, STE 2/19, set of 10 2
565 641L  4  LIT: Three-phase transformers and three-phase transformer circuits, T 2.4.1 (German) 1
565 641S  4  LIT: Three-phase transformers and three-phase transformer circuits T 2.4.1 (German) 1
565 642  4  * LIT: Three-phase transformers and three-phase transformer circuits T 2.4.1 (English) 1
additionally required: PC with Windows XP/Vista/7/8

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

 

Marka

Leybold

Firma produkuje zestawy edukacyjne do kształcenia akademickiego oraz szkolenia zawodowego z zakresu fizyki, chemii, biologii oraz elektroniki, elektrotechniki, automatyki, telekomunikacji, maszyn elektrycznych, odnawialnych źródeł energii i fotoniki, jest częścią grupy LD Didactic.