Section 8 Source of Electrical Power

801. Generator 【See Guidance】

1. Aggregate capacity of generators used for important system is to be sufficient to supply the total necessary electrical power for the barge. In A.C . generators, they are to have sufficient capacity to permit the starting of the largest motor in the barge during normal operation satisfactorily.

2. Generators used for important system are to withstand any load fluctuation in normal operating con- dition and always be capable of supplying stable electrical power.

3. Prime movers for generators used for important system are to be provided with speed regulators which will maintain the speed withstanding the load fluctuation of generators.

802. Switch boards 【See Guidance】

1. Switchboards are to be constructed and installed in accordance with the requirements in Pt 6, Ch 1, Sec 3 and 8 of the Rules for the Classification of Steel Ships in general.

2. Switchboards used for important system are to be provided with the instruments prescribed in Pt 6, Ch 1, Sec 3 of the Rules for the Classification of Steel Ships, as far as applicable. Where two or more generators are provided but not arranged to operate in parallel, the instruments of switchboard are to be in accordance with the discretion of the Society.

803. Section boards and distribution boards

Section boards and distribution boards are to be constructed in accordance with the requirements in

Pt 6, Ch 1, Sec 3 of the Rules for the Classification of Steel Ships.

804. Transformers for lighting and power

1. Transformers for lighting and power are to be constructed in accordance with the requirements in

Pt 6, Ch 1, Sec 6 of the Rules for the Classification of Steel Ship.

2. Transformers are to withstand any load fluctuation in normal operating condition and always be ca- pable of supplying stable electrical voltage.

805. Storage batteries 【See Guidance】

1. Batteries and their charging facilities are to comply with the requirements in Pt 6, Ch 1, Sec 13

of the Rules for the Classification of Steel Ships.

2. In the case of barge whose navigation lights are solely operated by electrical power, and where the

power source is batteries

have sufficient capacity themselves.

without means of charging during normal navigation, the batteries are to for operating hours of navigation lights and operating conditions of

3. Batteries prescribed in Par 2 may be used for starting the internal combustion engines unless this does not give any insecure effect to the function of these batteries.

806. Reserve source of electrical power

1. The barges whose navigation lights are solely operated electrical power except those for which the electrical power is supplied from pusher are to be provided with at least one set of independent re-

serve source of electrical power device which has the capacity to supply

gation lights at least 16 hours continuously. This device is to be available

the power to the navi-

immediately in stead of

Rules for the Classification of Steel Barges 2015 79

main source of electrical power, in the event of failure of the main source of electrical power.

2. In the case of unmanned barge, arrangements are to be made to ensure that reserve source of elec- trical power will automatically come into operation in the event of failure of the main source of electrical power.

3. For barge which has two or more generators, one of them may be regarded as a reserve source of electrical power. In this case, all generators are to be so arranged as to be available for the source of electrical power for the navigation lights.

4. Notwithstanding with the requirements in Par 1 the reserve source of electrical power system may be omitted where the navigation lights having own batteries approved by the Society are used.