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Reliability & availabilit
Reliability and availability

Reliability – Part 5

Reliability and availabilityPart 5: Factors impacting availability High availability is a key measure for many companies in today’s world in order to be competitive and to survive. If a supplier cannot deliver in contractually agreed date (delay) or cannot deliver Read more…

By admin, 6 yearsSeptember 11, 2019 ago
active and reactive power
Energy Efficiency

Energy efficiency – Part 6 (Power factor and reactive power consumption)

Input power factor and reactive power consumption The focus in all energy efficiency initiatives is to minimize the losses, improve the system efficiency and reduce overall power consumption. With “power” people usually refer to active power and this is basically Read more…

By admin, 6 yearsAugust 31, 2019 ago
Energy and cost saving - VFD efficiency
Energy Efficiency

Energy efficiency – Part 5

What efficiency can you expect from your drive system? In general, the efficiency of a drive system utilizing VFD is high. The differences come from the VFD topology, dimensioning and technical solution. As discussed in our previous post, the user Read more…

By admin, 6 yearsAugust 7, 2019 ago
Energy Efficiency

Energy efficiency – Part 4

How to compare efficiency figures of drive systems? Just two important reminders before starting with the topic: 1) Always keep in mind that the energy savings come due to variable speed control. The load consumes significantly lower power when the Read more…

By admin, 6 yearsJuly 29, 2019 ago
VFD dimensioning

VFD dimensioning: Derating and uprating

Derating and uprating factors What is the power rating of the specific VFD? An indicative value is provided in the technical catalog or brochure. This value shall refer to certain operation conditions, among others the temperature of cooling medium (air Read more…

By admin, 6 yearsJuly 22, 2019 ago
Life cycle cost (LCC) of a medium voltage VFD
Choosing MV VFD

How to choose a medium voltage VFD: Life cycle cost

How to choose a medium voltage VFD:Life cycle cost What is life cycle cost (LCC)? The definition from business dictionary (www.businessdictionary.com) says: Sum of all recurring and one-time (non-recurring) costs over the full life span or a specified period of Read more…

By admin, 6 yearsJune 10, 2019 ago
VFD engineering support
Choosing MV VFD

How to choose a medium voltage VFD: Engineering support

How to choose a medium voltage VFD:Engineering support Engineering support from VFD manufacturer significantly influences how smooth the execution of your project goes and how successful it will be in the end. It also directly impacts the quality of the Read more…

By admin, 6 yearsJune 9, 2019 ago
VFD protection - arc flash
Choosing MV VFD

How to choose a medium voltage VFD: Protection concept

How to choose a medium voltage VFD:Protection concept A variable speed drive system with gaps in protection philosophy is a ticking bomb. It might have a huge impact on plant availability and potentially also on personal safety. Therefore, no compromises Read more…

By admin, 6 yearsMay 26, 2019 ago
Choosing MV VFD

How to choose a medium voltage VFD: Design robustness

How to choose a medium voltage VFD:Design robustness Every end user probably wishes that his VFD has a robust design and works as intended during the entire lifetime of at least 20 years. Unplanned shutdowns and outages are unwanted. But Read more…

By admin, 6 yearsMay 26, 2019 ago
VFD - motor compatibility
Choosing MV VFD

How to choose a medium voltage VFD: Motor compatibility

How to choose a medium voltage VFD:Motor compatibility VFD – motor compatibility is an essential precondition for successful operation of power drive system. There is a large amount of publications underlying this topic. This article aims to explain the matter Read more…

By admin, 6 yearsMay 25, 2019 ago

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