Electrical power factor is a measure of the efficiency with which electrical power is being used in a system. It is the ratio of the real power (which is the power that is actually doing useful work, measured in watts) to the apparent power (which is the total power being used in the system, measured …
Tag archives: electrical
How to Maintain Electrical Equipment on Ships
How to maintain electrical equipment on ships, level 2 training. Ships electrical systems, differ slightly from land (shoreside) based installations. An example of this difference is the earthing system on board ships, as you cannot physically connect to the earths surface. Another difference, is the Voltage Frequency, in Hertz (Hz), which is typically 60Hz. In …
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How to Save Electricity Costs
Do this to save electricity, and lower bills. How to save electricity costs are on most peoples minds right now. This article mainly focuses on the home, rather than industry. Different electrical appliances use widely different amounts of electricity. Knowing which are the expensive to run, can help reduce electricity usage and therefore bills. KiloWatt …
Wet three phase Induction Motor Effects
Flooded or Wet Induction Motors First of all, try not to! When designing a marine of industrial installation, you need to consider the IP, or ingress protection rating of your Induction motor. By choosing a motor with a high enough IP rating, it is possible that when you submerge your Induction Motor, nothing will happen. …
Single Phasing In Three Phase Marine Induction Motors
Single Phasing Faults In Marine & Land Induction Motors Single phasing is the term used when one of the three stator windings in an induction motor is not ‘energised’. Three reasons for this happening in a Marine (& Land) environment are:- Mechanical vibration – causing the terminal nuts to become loose, and therefore disconnecting a …
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Tips for Servicing Marine & Land Based Induction Motors
Safety & Isolation of supply of induction motors. First tip, taking a casual approach to electricity can prove fatal. This is especially true when we are talking about three-phase motors, as they operate in the UK & EU at 400 Volts Alternating Current (400 VAC). Marine installations typically operate at an even higher 440 Volt …
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Transformers – The Different Types of Electrical Transformers
Transformers The Different Types of Transformers Transformers either ‘step up’ or ‘step down’ AC voltage. They do do by magnetic induction. Step Down types reduce the voltage coming out, compared to the voltage going in. These are the most common type. Step Up types have a higher output voltage than an input voltage. These are …
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How to Reverse the Direction of a Three Phase Induction Motor
How to reverse the direction of a three-phase induction motor. Reversing the direction of a three phase Induction Motor is useful in a number of situations. For example in a electric winch or elvevator (lift), there is a requirement for the motor to reverse. To reverse a three phase induction motor, swap over any …
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Phasing Out – Three Phase Induction Motors – on ships
Phasing out a Three Phase Induction motor, onboard ships (or on land) is the process of identifying both ends of each of the three stator coils (3 phase motor). 'Phasing Out' pic.twitter.com/RMLqyjbs0u — Craig Miles (@acraigmiles) October 17, 2016
Electrical fault finding Experience
Fault Finding Experience Experience of electrical fault finding Marine electrical & electronic systems (both practical & also teaching electro-technical officers & Cadets in Marine Industry. Marine permit to Work Procedures. Fault finding of Single & Three Phase electrical systems used both on Marine environments (Insulated Neutral), and land based Star & Delta based systems. Experience …