An Amplifier or an operational amplifier (op-amp) circuit is commonly used in the automation, control and other electronic circuits for marine applications. The applied input signal is normally a voltage or a current signal. The purpose of an amplifier is to produce an output signal larger than that of the input signal.
With new stringent regulations against pollution being introduced, it is important for the manufacturers to build marine engine that satisfy these norms and do not hamper the normal operation of the engine. To achieve this, engines are provided with several automation systems, which not only reduce the pollution level but also increase the efficiency of [...]
Thermocouple is a device which is widely used as a pyrometer onboard ship for continuous measurement of temperature
The insulation of the electric cable is generally made up of rubber or plastic. The amount of smoke generated by the plastic in case of fire is dependent on factors like nature of plastic, type of additive used, flame of fire and ventilation arrangement. In general most plastics produce a very dense smoke when heated. [...]
Insulation resistance is one of the important readings of marine electrical equipment systems and serves as the best guide to indicate the health of the equipment. Insulation resistance is measured between the insulated conductors and earth and between conductors.
The battery room of a ship is always under explosion risk as batteries release hydrogen during charging. Hydrogen is a highly explosive gas and it is therefore important to take necessary steps or actions while working inside the battery room during maintenance. In this article we will go through the measures that need to be [...]
The Main switch board is an intermediate installation in the ship’s power distribution circuit connecting the power generators and power consumers. The power generators on ships are auxiliary engines with alternators and the consumers are different engine room machineries such as motors, blowers etc.
Generators onboard ships are the power suppliers for the entire vessel as they stand as the primary source of power to all running machineries including the propulsion plant. For this reason, safe and efficient running of the ship generator has to be given highest consideration. One of the important safety devices used for ship’s generator [...]
The most important factor for the staff working onboard is personal safety and the safety features incorporated in machinery and systems. Electrical components and machinery systems present in the engine room are maintained by the electrical officer. The most important routine maintenance for electrical machinery involves checking of insulation resistance which is done by an [...]
Batteries are one of the energy sources available onboard vessels which are used in case of blackout and emergency situations on board a ship. These batteries are used for low voltage dc system like bridge navigational instruments and thus need to be kept charged to be used in case of any need of temporary power.
Several electrical machines and panels are fitted onboard so that the ship can sail from one port to another, safely and efficiently. The electrical machinery and system require scheduled maintenance and checks to avoid any kind of breakdown during sailing. Different instruments are used onboard for measuring several electrical parameters to analyze and keep these [...]
Azipod system used on ships is combination of both propulsion and steering systems. In conventional propulsion system, a large two stroke engine is connected to a shaft, which passes through shaft tunnel and stern tube and connects to the propeller outside the hull in the aft part of the ship. The steering of such system [...]
