Refrigeration Systems Electrical Installation Trainer

(AR-028_)

Read, understand, wire and test electric circuit diagrams.
Design and testing of a safety chain.
Design, investigation and operation of electrical components from refrigeration (startup capacitor, operating capacitor, start-up relay, time relay, timer, circuit breaker, start-up current limiter, contactors,pressure switch, thermostat and solenoid valve).
Investigate the star/delta connection.
Change of direction of rotation in an alternating current circuit.
Safety aspects when handling mains voltage.

2 Pressure switches:
- High pressure: 8~32 bar
- Low pressure: -1~7 bar
1 Differential pressure: 0.3~4.5 bar
- 2 Thermostats: -5~20º
1 Timer:
- 2 Switchable outputs.
- Switching time: 1~30 min.
5 Contactors:
- 2×: 3 NO, 1 NC.
- 3×: 4 NO.
Power: 380V, 50Hz, 3 phases.
Electrical components
- Timer
  - Power supply: 100-240VAC, 24-240VDC
  - Return time: max.100ms
- Relay
  - rated insulation voltage250 V
  - rated operational current3 A
  - Minimum switching current10 mA
  - Maximum switching voltage250 V AC/DC
  - Minimum switching voltage17 V
- Capacitor
  - Power consumption: 465 to 1190 watt
  - Voltage: 198 to 254V 50HZ
- Pressure switch:
  - Max. working pressure 46.5 bar
  - Contact load :10 to 16 A, 400 V, AC or 12 W, 220 V, DC
  - Max torque. 2 Nm
  - Rated impulse voltage4 kV
  - Short circuit protection, fuse16 A
- Thermostat
  - Ambient temperature-40 – 65 °C
  - Switch Single-pole, double-throw (SPDT) changeover switch
  - Rated impulse voltage 4 kV
  - Short circuit protection 16A
- Solenoid valve
  - Ambient temperature -40 - 80 °C
  - Ambient temperature range [Max] 175 °F
  - Ambient temperature range [Min] - 40 °F
  - Max. Working Pressure 45.2 bar

Refrigeration Systems Electrical Installation Trainer (AR - 032)
Hard copy user manual
Power Cord

Description
Technical Details

The Electrical Installation in Refrigeration Systems is an educational oriented device manufactured specifically to illustrate the different circuits and electrical devices associated with the refrigeration field, with this trainer the trainee can practice designing and executing different electrical circuits with different purposes.

The wiring of electrical components is a typical task in the field of refrigeration.
Besides the design and operation of the individual components, Knowledge about the interaction of the components in circuits is an important learning objective.
Safety aspects also play an important role.
With This product this knowledge and these skills can be acquired.
The electrical components are arranged clearly visible.
All the components are arranged on an upright stand such that they are all accessible and very visible, all components are connected on terminal blocks.
Using the cable included in the scope of delivery it is possible to set-up different circuits correctly and operationally.
The trainer includes five lamps that simulate the consumers usage.
All components are operated and tested with mains voltage to provide high relevance for practice.
There are electrical components for the start and operation of refrigerant compressors, such as e.g. electromagnetic start-up relay and capacitor.
With a timer, circuits can be designed andexamined for cyclical defrosting in refrigeration systems. This also includes the correct programming of the timer.
Typical safety components, such as pressure switches, thermostats and circuit breakers are also included in the scope of delivery.
These components enable the design and examination of a typical safety chain for refrigeration.
The unit is fixed on four caster wheels to eases its motion inside the laboratory, these caster wheels are equipped with brakes to prevent the trainer from sliding during the operation.
The unit is treated against rust and electrostatically painted.