Universal Resistor
for Training Board Set Electrical Machines (AC)

The entire system is made up of the following components:

• Control unit
• Brake unit
• Universal power supply
• Universal resistor
• Electrical machines
• Universal Power Meter
• Interface for electrical machines with software

Features:

• Teaching system for recording characteristic curves of electrical machines, manually and with PC
• Newly developed quick-action clamping device for test machines of heights 63 mm, 71 mm and 80 mm
• Existing machines as well as commercially available machines with one shaft end can also be used
• Braking and driving of the experimental machines is done wear-free with a three-phase asynchronous machine
• Universal Power Meter: with digital display and RS 232 interface
• The universal power supply provides all voltages required for the experiments: Fixed and adjustable DC voltage, AC voltage, three-phase AC voltage.
• The universal resistor as a starting resistor, load resistor and as a field regulator

**General information To carry out experiments, the control unit, the universal power supply and the universal resistor can be placed directly on the table at a slight angle of inclination or suspended in a table or demonstration rack for demonstration purposes.

The front panels of the units are made of 5 mm thick laminate, are matt blue and engraved with white symbols corresponding to the built-in function groups.

The backs are covered with a grey metal casing for protection.

The function groups are wired via 4-mm safety sockets.

• Electronics technician in automation technology
• Electronics technician for industrial engineering
• Mechatronics technician
• Electronics technician for machines and drive technology

Ring resistor, 500 W.

• With protective series resistor:

• 1,8 /150 W

• With 5-stage winding:

• 1,8 ... 11 /4,6 A

• 11 ... 32 /3,5 A

• 32 ... 56 /2,4 A

• 56 ... 140 /1,7 A

• 140 ... 1 k /0.6 A

• Series resistor, for extending the resistance range:

• k /180 W; Imax = 0.43 A

• Bridge rectifier:

• 3-phase, B6

• Umax = 500 V AC

• Imax = 9 A

Ring resistor, 100 W (field adjuster)

• 0 ... 1.5 k, with 2-stage winding and q-contact
• stages:
• 0 ... 450 /0,5 A
• 450 ... 1.5 k /0.25 A

The bridge rectifier has been integrated into the universal resistor (type 2750) so that synchronous generators can be loaded with the adjustable ring resistor (500 W). It can also be used to rectify the slip ring voltage of the slip ring rotor. This makes it possible to investigate any stages of the slip ring starter.

Dimensions (W x H x D): 532 x 297 x 210 mm. Weight: approx. 7.7 kg

Mechanical specifications The front panel of the BOARD is made of 5 mm thick laminate, colour matt blue, and is engraved with white switching symbols corresponding to the built-in function groups. A sturdy plastic cover protects the rear of the unit and, due to its shape, allows the unit to be placed at an angle on the table to suit the work.

Universal resistor for training board set electrical machines