Electrical connection of refrigerant compressors Use of a real refrigerant compressor Features - correct electrical connection of a refrigerant compressor - use of a real refrigerant compressor - design and investigation of a safety chain Learning objectives/experiments - read, understand, wire and test electric circuit diagrams for refrigerant compressors - design and operation of electrical components of refrigerant compressors -- start-up capacitor -- start-up relay -- overheat protection -- automatic fuse -- pressure switch -- thermostat - design and testing of a safety chain - representation methods in electrical engineering -- symbols -- circuit diagrams - -safety aspects when handling mains voltage- Specification [1] experimental unit from the GUNT practical series for the training of mechatronics engineers for refrigeration [2] correct electrical connection of a refrigerant compressor [3] refrigerant circuit with compressor, receiver, 2 valves and 2 manometers to investigate pressure switches on the delivery and intake sides [4] electrical components for the start and operation of the compressor mounted clearly visible [5] lab jacks and cables to connect the electrical components [6] operation of a thermostat [7] circuit diagram on the front panel for easy identification of the components [8] refrigerant R513A, GWP: 631 Technical data Refrigerant compressor - power consumption: approx. 193W at 5/55°C - refrigeration capacity: 374W at 5/55°C Receiver: 0,8L Manometer measuring ranges - delivery side: -1...24bar - intake side: -1...9bar Pressure switch control range - delivery side: 8...32bar - intake side: -0,9...7bar Thermostat: -5...35°C Electrical components for the compressor - start-up capacitor - start-up relay - overheat protection (bimetallic) - automatic fuse Refrigerant - R513A - GWP: 631 - filling volume: 300g - CO2-equivalent: 0,2t 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 920x410x660mm Weight: approx. 45kg