FC-6. Mounting and protection

Imagine you are the sales manager of frequency converter (FC) manufacturer company. Make four offers to the customers requesting FC for the four applications.

Request 1: Pump to a diary

• Parameters:
  • Rated flow 50 l/s, head 200 m, pump efficiency 81%, speed 1450 rpm
  • Grid voltage – 400 V, distance from the electric room to the pump - 30 m
• Environment: moist, wet floor

Request 2: Oil pump (inflamable oil)

• Parameters:
  • Rated flow 55 l/s, head 200 m, pump efficiency 81%, speed 1450 rpm
  • Grid voltage – 400 V, distance from the electric room to the pump - 30 m
• Environment: clean

Request 3: Conveyor at a cement plant

• Parameters:
  • Speeds: min – 150, max - 200 rpm
  • Rated torque - 5 kNm
  • Grid voltage – 400 V
  • Gearbox 1:5
  • Distance from the electric room to the conveyor - 30 m
• Environment: cement dust

Fig.1.Belt conveyor at a cement plant.

Request 4: Conveyor at a clean factory

• Parameters:

  • Speeds: min – 150, max - 200 rpm
  • Rated torque - 5 kNm
  • Grid voltage – 400 V
  • Gearbox 1:5
  • Distance from the electric room to the conveyor - 30 m

• Environment: clean, dry

Reflect on how degree of protection (IP) affects size and cost of the equipment. Present the results and the table: