4.
Is the main power supply of the ship normal? Preventing main power failure requires preventive self-examination from three aspects: prime mover, generator and main switchboard.
- Whether the main power supply capacity is sufficient (focus on the failure of single or multiple sets of generators and ships equipped with side thrusters, desulfurization towers, ballast water treatment devices, etc.).
- Check whether the prime mover starts and operates normally (fuel, lubricating oil, cooling water, etc.).
- Whether the prime mover security system functions normally (overspeed protection, low oil pressure, high cooling water temperature, etc.).
- Whether the main switchboard and generator unit control panel are normal (automatic start, stop, parallel, de-paralleling, load distribution, graded unloading control of the generator unit, etc.).
- Check whether the insulation monitoring function of the main distribution board is normal.
5.
Is the emergency power supply normal? The ship’s emergency power supply (mainly the emergency generator) can be used as an independent energy source to provide power for important equipment such as steering gears when the ship’s main power supply fails. The inspection of the ship’s emergency power supply can be carried out from the aspects of emergency generators, emergency switchboards, emergency battery banks, etc.
- Check whether the emergency generator starts and operates normally (fuel, oil, cooling water, etc.).
- Whether the emergency generator starting device meets the requirements. (Only applicable to sea-going ships).
- Whether the emergency generator has sufficient fuel reserve. - Whether the emergency generator mode switch for automatic starting is placed in the automatic position.
- When the main power is lost, according to regulations, can power be supplied to emergency equipment within 45 seconds (inland river ships are required to within 30 seconds).
- Whether the insulation monitoring function of the emergency switchboard is normal. - Whether the emergency battery pack is functioning normally. - Whether the quick-closing valve of the emergency generator fuel tank is working properly.
- Whether the switches of various load units on the emergency generator distribution board are in the open position.
- Are there check valves in the emergency generator compressed air bottle supply pipeline (in the emergency generator room)?
- Is the fuel leakage alarm of the high-pressure oil pipe of the emergency generator normal?
6.
Is the steering gear normal? In order to ensure the effective operation of the steering gear and prevent steering gear failures, self examination can be carried out from the aspects of the steering gear electrical system, hydraulic system, alarm device and operation.
- Whether the steering gear can start automatically after power failure. (Only applicable to seagoing ships)
- When main power is lost, whether the steering gear can receive power within 45 seconds. (Only applicable to sea-going ships, rudder stock diameter exceeds 230mm).
- When a single failure occurs in the electronically controlled steering gear power equipment, it should be able to switch to the backup power equipment within 10 seconds. (Applicable to river boats only).
- Whether the capacity of the steering gear hydraulic oil storage tank is sufficient to refill at least one power actuator system (including the reservoir).
- Whether the low-level audible and visual alarms of the hydraulic oil reservoir of the steering gear (in the cab and machinery space) are normal.
- Whether the audible and visual alarms of the steering gear (short circuit protection, overload alarm, phase failure alarm) are normal (in the main engine space or in the control room and bridge where the main engine is normally controlled). (Only applicable to sea-going ships).
- Is the steering performance test normal? - Whether the communication facilities between the cab and steering gear room are good.
THE REPORT | SEP 2024 | ISSUE 109 | 85
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