Identifying electrical faults in refrigeration systems requires comprehensive knowledge This knowledge includes the design and operation of the individual electrical components as well as the reading of circuit diagrams. The electrical components for the start and operation of a refrigerant compressor are clearly visibly arranged in a transparent showcase and already wired. The capacitor and start-up relay required for the motor are examined. Typical protection devices, such as circuit breaker and automatic fuse, are also arranged clearly visible.
The simulation of 15 different faults, e.g. coil fracture in the motor, short circuit in the operating capacitor or welded contacts in the start-up relay, is possible. For fault indication, voltages and resistances are checked at the lab jacks with the multimeter. The depiction of the circuit diagram on the front panel facilitates the allocation of the measuring points. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
Electrical connection of refrigerant compressors
Read and understand electrical circuit diagrams
Design and operation of the electrical components of a refrigerant compressor
Start-up capacitor
Start-up relay
Operating capacitor
Overheat protection
Main contactor
Automatic fuse
Fault finding in electrical components in idle state
Under mains voltage
Specification
Experimental unit from the practical series for the training of mechatronics engineers for refrigeration
Investigation of the electrical components for the operation of a refrigerant compressor
Real refrigerant compressor from practice
Electrical components for the start and operation of the compressor arranged in the transparent switch cabinet
General safety devices mounted clearly visible
Circuit diagram depicted on the front panel
Identification of 15 faults: multimeter measures voltages or resistances at the lab jacks