Schematic diagrams are broken down according to their functional aspect with the physical location. The mechanical relationships of the component parts of the equipment are usually... Read more
Ship electrical diagrams are schematic illustrations used to represent any ship electrical system ranging from single line power distribution systems to ship main power and auxilia... Read more
Reverse Power Relay is a directional protective relay that prevents/protect the generator from motoring effect (going to reverse direction). It is used where generator runs in para... Read more
Periodic operation of a ship at sea (coastal, restricted or unrestricted service) under the supervision of a single watch-keeper on the bridge is becoming normal practice. Similar... Read more
The performance of electric lamps will deteriorate with time. Eventually they fail and the lamps must be replaced. Simple lamp replacement becomes the most obvious maintenance task... Read more
Look at the stator windings for damaged insulation caused by careless replacement of the rotor into the stator. Discoloured insulation is an indication that the winding has been ov... Read more
The maintenance requirements for cage-rotor induction motors are very simple: contact resistance low Keep insulation resistance high and Lubricate correctly and maintain a uniform... Read more
ships, voltages upto and equal to 1000 volts is called as low voltage system and voltages above 1000 volts is called high voltage system. Normally low voltage system is common on b... Read more
The two systems dominating the market today are Frequency controlled A.C Motors and SCR controlled D.C Motors. Frequency controlled A.C Motor drive system were generally more cost... Read more
There are three types of overcurrent relay (OCR) used for motor protection: Electronic Thermal Electromagnetic Electronic OCIT (overcurrent inverse time) relays have largely supers... Read more
