Energy and cost savings with central extraction systems

Product catalog summary

Energy and Cost Savings with Frequency Inverter
Using a frequency inverter in an extraction unit offers significant energy and cost savings by adapting motor speed and power consumption to current demand. This ensures that unnecessary energy is not consumed, as the unit seldom requires maximum motor power. The inverter also protects components by gradually starting the motor, increasing service life and reducing maintenance costs. Noise emissions are reduced, enhancing employee protection. The unit operates efficiently in a partial load range, consuming less electricity. A 20% reduction in motor speed can lead to a 50% decrease in energy consumption. Additionally, the inverter optimizes voltage, current, and frequency, further reducing energy consumption by 3-4%.

Environmental and Operational Benefits
The starting current is reduced, which is crucial for designing cabling and fuses. The current consumption remains below the motor's rated current, unlike when using a star/delta circuit or soft starter. The extraction capacity remains constant across varying numbers of welding stations, reducing CO₂ emissions and potentially qualifying for government subsidies.

Advantages of Filter Cartridges
Filter cartridges in the extraction unit benefit from power control, ensuring no excess air is extracted, thus preventing damage from excessive volume flow. Halving the volume flow can quadruple the filter life. As filter resistance increases, the extraction capacity remains constant, ensuring effective capture of hazardous substances.

Calculation Example
A fan with a motor power of 22 kW consumes only 11.3 kW at 80% speed, reducing energy consumption by about 50%. This demonstrates the efficiency of using a frequency inverter in managing energy consumption.

Catalog excerpts

Energy and cost savings with central extraction systems-1

ENERGY AND COST SAVINGS through automatic extraction capacity co In terms of energy and cost savings, what are the advantages of an extraction unit with connected frequency inverter for automatic extraction capacity control? A frequency inverter adapts the motor speed and the power consumption to the current demand. An extraction unit seldom requires the maximum motor power and with a frequency inverter, no unnecessary energy is consumed for most of the operating time. Components are protected by slowly starting the motor. The service life is increased and maintenance costs are reduced. Noise emissions from the fan are significantly reduced and employee protection improved. The extraction unit runs for a large part of the operating time in a well-regulated partial load range and therefore it consumes noticeably less electricity. For example if the motor speed is reduced by 20% the energy consumption, the energy consumption, decreases over-proportionally by about 5

Open the catalog to page 1

Energy and cost savings with central extraction systems-2

A fan with a motor power of 22 kW consumes only 11.3 kW (22 kW x 0.8 x 0.8 x 0.8=11.26 kW) at 80% of its speed, thus reducing energy consumption by about 50%. In addition to the over-proportional reduction in power consumption, a frequency inverter takes the individual characteristics of the motors into account and adjusts itself accordingly. The motor is supplied with optimum voltage, current and frequency. This increases efficiency and reduces energy consumption by a further 3-4%. The starting current is reduced, which is several times the rated current. This is important when designing cabling...

Open the catalog to page 2