9.2.1 An electrical insulation resistance test is to be made on the electrical
equipment and cables. The installation may be subdivided, or equipment which may be
damaged disconnected, for the purpose of this test.
9.2.2 The fittings on the main and emergency switchboard, section boards and
distribution boards are to be examined and over-current protective devices and fuses
inspected to verify that they provide suitable protection for their respective
circuits.
9.2.3 Generator circuit-breakers are to be tested, so far as is practicable,
to verify that protective devices, including preference tripping relays, if fitted,
operate satisfactorily.
9.2.4 Air circuit-breakers for essential or emergency services and rated at
800A and above are to be surveyed to ensure that the manufacturer’s recommended
number of switching options has not been exceeded. See
Pt 6, Ch 2, 7.3 Circuit-breakers 7.3.6 of the Rules for Ships. Where a
breaker is not fitted with an automatic counter, a written record is to be kept.
9.2.5 The electric cables are to be examined, so far as is practicable, without
undue disturbance of fixtures or casings unless opening up is considered necessary
as a result of observation or of the tests required by 9.2.1.
9.2.6 The generator prime movers are to be surveyed as required by Pt 1, Ch 3, 7 Turbines – Detailed requirements and Pt 1, Ch 3, 8 Reciprocating internal combustion engines – Detailed requirements and the governing of the engines tested. The
motors concerned with essential services, together with associated control and
switch gear, are to be examined and if considered necessary, are to be operated, so
far as is practicable, under working conditions. All generators and steering gear
motors are to be examined and are to be operated under working conditions, though
not necessarily under full load or simultaneously.
9.2.7 Where transformers associated with supplies to essential services are
liquid immersed, the Owner is to arrange for samples of the liquid to be taken and
tested for dissolved gases, breakdown voltage, acidity and moisture by a competent
testing authority, in accordance with the equipment manufacturer’s requirements, and
a certificate giving the test results is to be made available to the Surveyor on
request.
9.2.8 Navigation light indicators are to be tried under working conditions,
and correct operation on the failure of supply or failure of navigation lights
verified.
9.2.9 The emergency sources of electrical power, their automatic arrangements
and associated circuits are to be tested.
9.2.10 Emergency lighting, transitional emergency lighting, supplementary
emergency lighting, general emergency alarm and public address systems are to be
tested as far as is practicable.
9.2.11 Where the unit is electrically propelled, the propulsion motors,
generators, propulsion transformers, propulsion conversion equipment, cables,
harmonic filters, neutral earthing resistors, dynamic breaking resistors and all
ancillary electrical equipment that forms part of the propulsion drive and control
system, exciters and ventilating plant (including coolers) associated therewith are
to be surveyed and the insulation resistance to earth is to be tested. Special
attention is to be given to windings, commutators and sliprings. Where practicable,
the low voltage and high voltage windings of resin coated propulsion transformers
are to be subjected to boroscopic inspection, to assess the physical condition of
their insulation and for signs of mechanical and thermal damage. The operation of
protective gear and alarm devices is to be checked, so far as is practicable.
Insulating oil, if used, is to be tested in accordance with 9.2.7. Interlocks
intended to prevent unsafe operations or unauthorised access are to be checked to
verify that they are functioning correctly. Emergency over-speed governors are to be
tested.
9.2.12 A general examination of the electrical equipment in areas which may
contain flammable gas or vapour and/or combustible dust is to be made to ensure that
the integrity of the safe type electrical equipment has not been impaired owing to
corrosion, missing bolts, etc., and that there is not an excessive build-up of dust
on or in dust-protected electrical equipment. Cable runs are to be examined for
sheath and armouring defects, where practicable, and to ensure that the means of
supporting the cables are in good order. Tests are to be carried out to demonstrate
the effectiveness of bonding straps for the control of static electricity. Alarms
and interlocks associated with pressurised equipment or spaces are to be tested for
correct operation. Particular attention should be given to cable runs in way of
articulated joints and breaks in process deck boundaries.
9.2.13 Shipboard Automatic and Remote-Control Systems. In addition to the
requirements of Annual Surveys, the following parts are to be examined:
- Control actuators: All mechanical, hydraulic, and pneumatic
control actuators and their power systems are to be examined and tested as
considered necessary by the Surveyor.
- Electrical equipment: The insulation resistance of windings of
electrical control motors or actuators is to be measured, with all circuits
of different voltages above ground being tested separately to the Surveyor’s
satisfaction.
- Unattended plants: Control systems for unattended machinery
spaces are to be subjected to dock trials at reduced power on the propulsion
engine to ensure the proper performance of all automatic functions, alarms
and safety systems.
9.2.14 For production and oil storage units five years old and over, 9.2.11 is
to be complied with. In addition, an electrical insulation resistance test of the
circuits terminating in, or passing through, the dangerous areas is to be carried
out.
9.2.15 Where batteries with charging power higher than 2kW provide the source
of power for any essential or emergency services, their installation, including
charging and ventilation arrangements, is to be examined.
9.2.16 Sufficient battery capacity shall be verified for Lithium-Ion battery
system installations used as the primary power source for emergency systems.
9.2.17 Where Lithium-Ion batteries with total system capacity exceeding 20 kWh
are used as the primary power source for essential or emergency systems, a test of
all required monitoring and safety functions shall be carried out.
9.2.18 A test of the safety functions in spaces or compartments containing
Lithium-Ion batteries with total system capacity exceeding 20 kWh used as power
source for essential and emergency services shall be carried out, i.e., fire
detection and extinguishing, gas detection, ventilation etc. as applicable to the
installation.
9.2.19 The safety aspects of spaces or compartments containing Lithium-Ion
batteries used as a power source for essential or emergency systems are to be
examined as applicable to the installation. This could include examinations of:
- structural fire protection;
- fixed fire detection;
- fixed firefighting system(s);
- ventilation and associated dampers;
- off-gas detection, exhaust and/or extraction arrangement;
- integrity of battery crates, trays, boxes, shelves and other structural
parts;
- battery cooling arrangement;
- electrical power cabling, switchgear and converters; and
- EEBD (emergency escape breathing device) and means of escape.