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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What is a contactor, is a question a new automation engineer might ask. Industrial automation involves lots of integrated components. Contactors are electrically controlled switches. Contactors use a lower voltage and current, such as 230VAC (Volts Alternating Current), to switch a larger voltage and current. An example of the use of a contactor in industrial …
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Pouring water on an Induction Motor may stop it working, due to the lowering of the insulation resistance of the internal motor coil windings. The coil windings are located inside the metal case of the induction motor, and are what generates a magnetic field, which makes the motor turn. This article will focus on what …
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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 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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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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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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To reverse a three phase induction motor, swap over any two of the three phase connections in the motor terminal box. Caution: Only do this if you have been trained, as theres over 400 Volts Ac involved.
