In the marine environment, it is essential to have a reliable source of power. Diesel generators are mainly used to provide power to ships and other marine vessels. During a vessel voyage, depending on power requirement (during maneuverings, canal transit, shallow waters, using bow/stern thrusters etc.) the engine crew need to run more than one…
As the size of vessels continues to grow, so does their demand for power, which means that more powerful engines and other pieces of equipment will need to be installed. The larger size and increasing need for power necessitate the use of higher voltages on board, which enables the energy to be distributed throughout the…
Many of you might have worked on vessel equipped with Hyundai HAT series Air Circuit Breakers which proves to be very reliable and efficient but…like any other machineries it requires periodical checks and maintenance. If this is not properly done the result it might be a failing UVT coil or breaker fail to close when…
An insulated system is one that is completely electrically isolated from the earth or in our case the hull of the vessel.The supply neutral point is connected to earth in an earthed system and main low voltage (LV) (440 V AC) systems are generally shielded from the ship’s hull. Ashore, similar systems are earthed to…
Onboard vessels, modern power management systems make it less likely for power to go out for no reason, but engineers must be familiar with the specific procedures, where to find the instructions and procedures, and ready to act in case of automation failure. In case of a problem with power main diesel generators or in…
Insulation is a common feature of all electrical equipment and the purpose of it is to keep electric currents in the conductors and to avoid contact with live wires. The electrical resistance of insulation must be very high (MΩ) to prevent current leaking away from conductors. Insulation resistance is measured between: Conductors and Earth Conductors…
Most of the emergency power requirements are supplied by the emergency 24V system which consists of a battery distribution board backed up by a separate 24V battery. This provides a smooth changeover to a constant power source upon loss of the ship’s main or emergency power. When the emergency source of electrical power is an…