Blog posts

When the standard stops, Fluke goes further!

EC 60034-30-1 is the standard on efficiency classes for low voltage AC motors What are the efficiency classes defined by IEC/EN 60034-30-1: 2014? The standard defines four IE (International Efficiency) efficiency classes for single speed electric motors that are rated according...
motor analysis

Verification of the Fluke 438-II motor analyzer

The Fluke 438-II Power Quality and Motor Analyzer gives users the ability to measures key motor performance analysis including efficiency and shaft mechanical power measurements. These measurements can be performed on asynchronous motors, for both direct on line and inverter...

Electric motor efficiency and reliability: mechanical power and derating on in-service electric motors

Electric motors are the key component in many industrial processes, they can consume up to 70% of the total energy consumed in an industrial plant and consumes 46% of all generated electricity worldwide.  The cost of downtime due to...
Motor maintenance

Why you should add motor analysis to your maintenance routine

Electric motors are the single biggest consumer of electricity, accounting for about two thirds of industrial power consumption. And, according to a new analysis by the International Energy Agency, about 45% of global power consumption. IEC 60034-30-1 defines efficiency classes...
DC power

Electrical Power Explained – Part 1: Basic DC power

'Classical' electrical power theory is no longer enough 'Classical' electrical power theory is fine for describing simple resistive loads. It cannot, however, handle complex three-phase inductive systems that generate harmonic, unbalance and neutral-line powers. So, classical theory is no use...
solar panel

DC injection the new source of trouble

Grid connected photovoltaic systems are growing in importance as sustainable energy sources. The DC power of the solar panels is converted into an AC power by inverters. These are transformerless and, besides generating AC current, also inject a small DC...
Harmonics

Harmonics – where do they come from?

Harmonics can cause all sorts of problems: tripped relays, failed transformers, damaged capacitor banks and even cracked motor shafts. But where do they come from, and how do you cure them? Non-linear loads like low-energy lights, VSDs, switched-mode power supplies...

Current Clamps; AC, DC or Rogowski… what is the difference?

Since explaining the difference between these three separate ways of measuring current needs to include the principles of measurement, this blog is a little longer than normal. Nevertheless, it is worth reading to get the difference and avoid making...
Fluke Power Quality analyzer

How to find the root cause of production stops?

Suddenly, production stops. It happens all too often, and can be hugely costly. Preventing it needs well maintained equipment with regular inspections at pre-defined intervals. Monitoring your supply to the EN50160 standard gives you valuable information on the power...
power quality cabinet

How to use a phasor diagram?

When you perform an energy or power quality survey you need to measure days or weeks of data, imagine the disappointment if when you return to the logger after that time you discover that you have failed to capture...

Most Popular Posts

Choosing the right current clamp

Many users of an energy logger, power logger or power quality analyzer usually use the tool’s supplied current clamp in their application. Since the...

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