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: marine
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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Lead-Acid Batteries Care and Maintenance on Ships
Care and Maintenance of Lead Acid Marine Batteries on Ships Lead-Acid Batteries on ships provide an important function. In the event of a ‘blackout’, or loss of generator power, they allow the ships important systems to continue to operate, until backup generators ‘kick in’, or repair can take place. Important systems include communications, such as …
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Marine Radio Equipment Installation
Marine Radio Equipment Installation on Ships Having talked with many current, and retired Electro Technical Officers (ETO), it is apparent that radio communications is considred by some, a ‘Black Art’. The main two frequency bands that you will come across on a Marine vessel are HF & VHF. HF is short for High Frequency, and …
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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Industrial & Marine Induction Motor Servicing Tips
Marine Induction Motor Servicing Tips Safety & Isolation of supply when marine induction motor servicing. Taking a casual approach to marine induction motor servicing & 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). …
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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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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). https://twitter.com/acraigmiles/status/787937094408794112
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 …