What is an active front end Variable Speed Drive?

Easy installation with active filter The active front-end drive is also easier to install, as you only have to consider the mains voltage, the pump absorbed power and the fault level of the network. For a passive filter, you have to consider all of the above plus the existing power factor correction. The filter also …

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What causes Harmonics?

Harmonics are caused by non-linear loads on the network, such as fluorescent lights, computers, welding supplies and AC drives. In the case of AC drives, there is reason to be extra careful, as an individual site can have many of these installed. When adding further AC drives at a site, the total harmonic load should …

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How can I reduce harmonics caused by Variable Speed Drives?

Passive filter needs site survey If a passive filter solution is to be successful, the characteristics of the network must be taken into consideration. The total harmonic voltage distortion of the non-influenced mains voltage has to be less than 2 percent and the ratio of short-circuit power to installed load must be at least 66. …

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How do I reduce Harmonics?

Harmonics caused by AC drives can be mitigated using passive filters or active front-end drives. Passive filters cost less and can be effective under some circumstances; the challenge lies in establishing just what those circumstances are. If the required conditions for a passive filter are difficult to meet, the safest option is to install an …

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What type of cable should be used between variable speed drives and motors?

Long cables in tunnel installation A recent example of a long cable installation is the new road tunnels on the E18 motorway in Finland. Here, 16, 55 kW ABB standard drives for HVAC are used to ensure safe driving conditions by adjusting air flow in the tunnels to demand, controlling the speed and the direction …

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How do I size cable runs between Variable Speed Drive and motors?

The cable should be sized for the motor full load current plus overload, without allowance for harmonic content. When using sizing software, most cable sizing programs assume that 600 percent direct-on-line (DOL) starting current will be required. However, such high currents are never encountered in installations using variable-speed drives. When using a cable sizing programme, …

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What is maximum length of cable run allowed between variable speed drives and motors?

Long cables between the motor and the drive should generally be avoided, but sometimes lengthy cable runs are unavoidable. When using a long motor cable, it is important to size it correctly, to allow for the volt drop and to consider the impact on EMC performance.   When designing a drive system, the motor cables …

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Energy Product/Service Award Finalists

Quantum Controls are delighted to announce we have returned from the 2011 Environment and Energy Awards as finalists in The Energy Product/Service category.  The awards attracted a record number of entries this year including big names such as Marks & Spencer, Asda and John Lewis.  With more and more organisations placing energy saving and sustainability …

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Quantum Nominated for Energy Award

Today (24th May) four of the team at Quantum Controls will be getting all dressed up to attend The Environment & Energy Awards.  Quantum have been nominated for the Energy Product/Service Award, a tough category as you can see from the shortlist below. The Energy Product/Service Award (Shortlist) Visual Interactive Ltd E-Energy Enterprise Ltd Rinnai …

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Quantum and ABB Hold Coporate Seminar & Golf Day

Competition is hotting up for the 2011 Quantum Controls ABB Corporate Seminar & Golf Day at Slaley Hall.  The best the industry has to offer in golfing talent will be competing on Thursday 14th July at Slaley Hall.  The event is free to all Quantum Controls clients (and industry guests) it promises to be a …

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