What are system interlocks?
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What are system interlocks?
An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may be used to prevent undesired states in a finite-state machine, and may consist of any electrical, electronic, or mechanical devices or systems.
What is motor interlocking?
To interconnect the motor circuit in such a way, in which the second motor will not start until the first one run likewise the third one motor will not run unless the second one run and so on. This kind of motor circuit connection is called interlocking.
What is main engine alarm?
Marine Main Engine Alarms And Trips
- Cooling water High temperature alarm,
- Jacket cooling water low pressure alarm,
- Air cooler high temperature alarm,
- Fuel oil high temp,
- Fuel oil Low pressure.
What are pump interlocks?
The main switch of the pump as well as the suction and discharge valve are equipped with valve interlocks. Using interlocks, operators are only allowed to open or close the correct valve in the correct sequence, there is no bypassing the system.
What is reversing interlock?
REVERSING COMPLETED INTERLOCK: As reversing has completed, the shaft of the starting air distributor reversing cylinder shall move outwards to press the AHD micro switch, allowing a part of control air to pass through the IL and a block valve to release and fulfil the reversing completed interlock.
What is interlock contactor?
What is Contactor Interlocking? When an electrical circuit has two contactors and only one of them needs to be turned on at a time then the interlocking system is used. The interlocking system ensures that only one contactor can be on while another one will be in off condition even if we try to manually on.
What are the safeties of main engine?
Main Engine Safety devices
| Main Engine Safety Devices | Main Engine Alarms and Trips |
|---|---|
| 1. Crankcase Relief Door | 1. Over Speed Trip |
| 2. Scavenge Space Relief Door | 2. Lube Oil Low Pressure Trips |
| 3. Cylinder Head Relief Valve | 3. Camshaft Lube Oil Low Pressure Trip |
| 4. Starting Air Relief Valve | 4. JCW low pressure trip |
Why main engine required a shutdown device?
3. Shut down: When there is a higher fluctuation in the engine parameters which can harm other systems of the engine, the shut down protective devices cut off the fuel supply and the engine stops.
What is hardwired interlock?
Hard Wired Interlock is an interlock accomplished by electro-relays and/or wires that is not accomplished through a Programmable Electronic System. ( Refers to the Software Interlock)