Source: https://www.scribd.com/document/81443604/Solas-powerEquiipment-steearingGear
Timestamp: 2018-08-20 13:28:47
Document Index: 96361279

Matched Legal Cases: ['art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1']

Solas_powerEquiipment_steearingGear | Transmission (Mechanics) | Engines
Solas_powerEquiipment_steearingGear
Uploaded by Stella Roncevic
Chapter 3 Page 7–1
Section 7 Power Equipment
A. 1. Steering Gear General 2.2 A separate power supply circuit from the main switchboard is to be provided for each steering gear power unit. After an electrical power failure, the steering gear power units shall restart automatically when the power is restored. 2.3 On ships with a calculated rudderstock of more than 230 mm in diameter (see the GL Rules for Machinery Installations (I-1-2), Section 14, A.4.1), without ice strengthening, an alternative power source additional to the main power source is required, which is capable of supplying the steering gear in such a way that this is able to perform at least the duties of an auxiliary steering gear. It shall also supply the steering gear control system, the remote control of the power unit and the rudder-angle indicator. In addition, the alternative power source shall be automatically connected within 45 s after a power failure. This power source may be the emergency generator set, or an independent power source intended only for this purpose and situated in the steering gear compartment, and shall maintain operation: – – for 10 minutes on ships of up to 10 000 GRT and for 30 minutes on ships of 10 000 GRT and over.
1.1 Every ship shall be provided with two as far as possible independent steering gear systems, as follows: – – 1 main and 1 auxiliary steering gear on every tanker, chemical tanker or gas carrier of 10000 gt and upwards and in every other ship of 70 000 gt with 1 main steering gear with two or more identical power units on every passenger ship with 2 main steering gears
Where electrical or electro-hydraulic steering gear is installed, the following Rules are to be observed. 1.2 The design of main and auxiliary steering gears shall conform to SOLAS, Chapt. II-1, Part C, Reg. 29 and 30, and to the GL Rules set out in Machinery Installations (I-1-2), Section 14, A. 1.3 The electrical systems of main and auxiliary steering gears shall be so designed that a failure in one of them shall not affect the operation of the other. This also applies when the main steering gear comprises two or more identical power units, and an auxiliary steering gear need not therefore be provided under the SOLAS regulations. 1.4 On every tanker, chemical tanker or gas carrier greater than 10.000 gt the main steering gear system shall be so arranged that in the event of loss of steering capability due to a single failure in any part of the power actuating systems of the main steering gear, excluding the tiller, quadrant or components serving the same purpose, or seizure of the rudder actuators, steering capability shall be regained in not more than 45 s after the loss of one power actuating system. The isolation of the defect part of the system shall be done by automatic means. 1.5 For increased vibration loads in the steering gear compartment, see Section 1, E. 2. Power supply
2.4 The system is to be so designed that it is possible, from the bridge or the steering gear compartment, to put each power unit into operation. Mechanically separated switches are to be provided for this purpose. The supply of the bridge remote control for the power units shall be run from the associated switchgear in the steering gear compartment – same as steering gear control system – and shall be made for its disconnection without any accessories. For supplies to the steering gear control systems, see 6. 3. Design of the electric drives
2.1 The power supply to steering gears is also required to comply with the provisions of Section 4, I.
3.1 To determine the torque characteristics required for electric motors of power units, account is to be taken of the breakaway torque and the effective maximum torque of the steering gear under all operating conditions (see the GL Rules for Machinery Installations (I-1-2), Section 14, A.4.).
Each steering gear motor shall have an ammeter mounted in the main or emergency switchboard.2 If a sequential (follow-up) control system and a time control system are provided.2 – 3. 5.1 Ships with electrically operated steering gear controls shall have two independent steering gear control systems.1 mand: – – Steering gear with intermittent power de- 6. 6.4). Steering gear control systems S 6 . if provided. each control system can be permanently assigned to a power unit. 5. 6. 6. The switch-over from automatic.or track control system is installed. if possible. when it cannot be verified that it is free of reactive effects. Switchgear 4. The Override facility shall be so designed that self-induced return to automatic control is not possible except where the course preselection of the automatic system is automatically kept in line. including starting current.8 Different steering modes including steering gear control positions on the bridge wings shall be changed over by all poles. the fuse rating shall not exceed 160 % of the rated motor current. 6. 3. The circuits of the various control systems shall be arranged electrically and physically separated. then the follow-up tiller shall be fitted with a retaining spring to midship position.4 The instantaneous short-circuit trip of circuit breakers shall be set to a value not greater than 15 times the rated current of the drive motor. These switches or fuses are to be specially marked.Chapter 3 Page 7–2 Section 7 A Power Equipment I .2 The following requirements apply to the modes of operation: 3.Part 1 GL 2011 3. Where two identical control systems are installed.100 % continuous service For the motor design. .2. in the case of intermittent-service motors. It is necessary to ensure that the rudder-angle The ratio of pull-out torque to rated torque is to be at least 1.5 The protection of control circuits shall correspond to at least twice the maximum rated current of the circuit.3 4. see Section 20. below 6 A.40 % for the motors of electromechanical steering gears 6. Portable steering consoles are to be connected via plugs with pin coding. Steering gear motor circuits obtaining their power supply via an electronic converter and which are limited to full load current are exempt from above requirement.3 Provision shall be made for operating the main and auxiliary steering gear from the bridge and the steering gear compartment. However.7 On ships where an automatic control system like heading.1 The circuits for the control systems and motors of steering gears are to be protected only against short circuits. Switching of the control systems shall be possible on the bridge. though not. by removal of the fuse-links or switching off the automatic circuit breakers). Protection equipment 5. The override facility shall be independent of the automatic control system or follow-up control mode. 4. 6. or in the contactor cabinets. or a take-over system/button shall be installed on bridge wings. 5. A common steering wheel or a common tiller may be used. as applicable.6 in all cases.3 Protection equipment against excess current. is to be required to be not for less than twice the rated current of the motor so protected.2. Combined contactor cabinets are not permitted. 6.25 % for converters and the motors of electro-hydraulic drives S 3 . 5. If a follow-up control system is installed on the bridge wing.1 Each steering gear motor shall have its own separate switchgear. their current ratings shall be two steps higher than the rated current of the motors. 6.to manual control by "Override" is to be indicated optically and audibly at the steering position.2 Where fuses are used. Steering gear with constant power demand: S 1 . or from the corresponding power unit feeders in the main or emergency switchboard (see 2.6 For switching over between different control systems a common control selector switch may be provided. Separated cables and wires are to be provided for these control systems.2 The remote control systems of the power units and the rudder control shall be capable of being disconnected or isolated inside the contactor cabinets (e. each of these systems shall be able to operate on each power unit. an override facility shall be installed close to the operator unit of the automatic steering system. such as autopilot systems.4 The power supplies to the electrical steering gear control systems shall be taken from the power unit supplies in the steering gear compartment.5 The electrical separation from each other of the steering gear control systems shall not be impaired by the addition of extra systems. 5.g.
g.4 In case of fixed relation between control system and power unit the alarms No. 7. 7.: – – steering mode selector switch follow-up/ non-follow-up control devices These Rules apply to equipment with electrical drive. Lateral Thrust Propellers and Manoeuvring Aids 9.1 may be grouped. B. 7. 1 2 3 Operation of power unit Power failure or power unit/control Overload of electric drive or phase failure of supply × × × ⊗ 4 5 6 7 Low level of hydraulic oil tank Power failure of steering control system Hydraulic lock Failure actual steering mode × × × × ⊗ ⊗ ⊗ ⊗ 7. Alarms and indicators on the bridge shall be announced at a position close to main steering station. Alarms and indicators Table 7. 6.3 ⊗ = Group indication 10. 10. e. 7.1 Alarms and indicators for steering gears and controls are to be gathered from Table 7. critical deviations between rudder order and response shall be indicated visually and audibly as actual steering mode failure alarm on the navigating bridge. 8.1 For the testing of electrical motors.9 Repeaters and limit switches .I . 5 of Table 7. shall be applied in appropriate manner. shall be applied in appropriate manner. Rudder-angle indicator Note × = Single indication.5 The energy supply for the alarms and indicators shall be in accordance with A.1 Control of steering propeller systems for main propulsion units Control of the direction of thrust The requirements of 6. 1. 10. shall be applied in an appropriate manner. and 9. C. 9. The following parameters shall be monitored: – – – Direction: actual rudder position follows the set value.4. .1. 10. Accuracy: the end actual position shall correspond to the set value within the design offset tolerances.3 Steering gear control systems with all components important for the function are subject to a mandatory type approval. 9. see Section 20.Part 1 GL 2011 Section 7 B Power Equipment Chapter 3 Page 7–3 indicator can be read within the range of operation of the portable steering console.2 Monitoring and testing See Section 9. Delay: rudder´s actual position reaches set position within defined time limits.1 shall be signalled visually and audibly irrespective from the automation equipment.2 Depending on the rudder characteristic.3 Indicator 9. The regulations in Section 9. see also 7.2 The following monitoring devices are subject to mandatory type approval: – – phase-failure relays level switches The effect on the course shall be indicated. 2 and No. Alarms/indicators 7.3 The alarms/indicators listed in Table 7. Rating Manoeuvring aids shall generally be rated for continuous duty.1 Alarms and indicators of steering gear and controls Main and auxiliary steering gear Bridge Engine room × ⊗ No.if provided shall be linked electrically and mechanically to the respective control system and mounted separately to the rudder stock or the adjusting devices.2. Tests The requirements of 7. C.
Regarding remote starting of fire pumps on ships with unattended engine room see Automation (I1-4) 1. For the design of these systems. Power for the electrical control system shall be taken from the main power supply to the drive. the main steering station on the bridge shall be provided with the following indicators: – – – an indicating light showing that the system is ready for operation an indicating light signalling an overload (for systems without power control) depending on the type of equipment.30 min at all speeds. If the maximum permissible temperature is reached the output shall be automatically reduced or the motor shall be switched off. a phase-failure supervision is required to prevent the system to be started if one phase fails. From the main steering station on the bridge it shall be possible to isolate completely any additional electrical remote-control facilities provided on the open deck (e. see also the GL Rules for Machinery Installations (I-1-2). 1. D.1 For lateral thrusters. E. .2 Indications and alarms in the engine room or engine control room: Faults which may cause failure or endanger the drive shall be signalled optically and audibly as collective alarms.and output units and actuating devices shall be type-tested. Failure of the control system shall be signalled optically and audibly on the bridge and in the engine room.4 There shall be an emergency stop at every control station. Section 12.1 The equipment shall be protected in such a way that. 3. For plants with automatic current limitation the warning is not required. 2. The design and operation of these systems shall conform to the Rules for Machinery Installations (I-1-2). 2. pump controls shall be so designed that in the event of failure of the remote control the local control remains operative. 3. Variable Pitch Propellers for Main Propulsion Systems 2.1 The power supply to the motors and the firepump control systems are to be so arranged with regard to the assignment of sources of power.1. which affects the feeder breaker in the main switchboard. 4. if fire pumps have a soft starter.). Protection equipment C.3 The direction of movement of the controls of lateral thrust units shall correspond to the desired direction of motion of the ship. the main power supply to the drive is disconnected quickly enough to avoid endangering the selectivity of the system with regard to the generator switchgear. Provision shall be made to enable the system to be controlled from the bridge and from the engine room. the routing of the power-supply cables and the location of the controls that a fire in any main fire zone cannot render all the fire pumps unserviceable (see also the GL Rules for Machinery Installations (I-1-2). The audible warning shall be acknowledgeable on the bridge. in the event of an overcurrent. 1. L.1.2.Part 1 GL 2011 Drives used only for lateral thrust shall be designed at least for short-term duty S 2 .g. 1. monitors and indicators 1.2 Pressure water spraying systems (Sprinkler) 3. An exceeding of temperature limits shall be alarmed. 3. to the requirements of Section 9.2 The design of the fire-alarm system shall be acc.2 If remote starting is provided for fire pumps.2 If fuses are used for short-circuit protection. Section 12.3 A bypass shall be provided.1. An ammeter for the drive motor shall be provided at the main switchboard. an audible and visual warning is first given on the bridge. 1.1 Pressure water spraying systems shall be supplied from the main and from the emergency source of electrical power. 3.Chapter 3 Page 7–4 Section 7 D Power Equipment I . Section 6. Input. 1.1 Auxiliary Machinery and Systems Fire-extinguishing systems Fire pumps 3. Controls. on bridge-wings).3 It shall be ensured that. followed by an automatic power reduction or disconnection of the system if the overload persists.4 Motors for short-term duty shall be monitored for critical winding temperature.1. indicators showing the power steps and the desired direction of motion of the ship 1. D.2. 2. 2. 2. if a lateral thrust propeller stalls. 1.
2 It is recommended that one of the engine room fans should be supplied from the emergency source of electrical power to enable the extraction of fire-extinguishing gases.2 Main engines 2.9.3 6.3 An disconnect switch shall also be fitted near the drive unit. 6.1 On cargo ships power-driven fans for accommodation.8. 2. The capacity of the batteries shall be sufficient for at least three starting operations per engine. one battery is sufficient.3 Regarding fans for passenger ships.2. If starting is impossible at this temperature or if lower temperatures are likely to be encountered. The switches for switching off the machinery space ventilation shall be separated from the switches for switching off the other fans.2.2 The starter batteries shall only be used for starting (and preheating where applicable) and for the monitoring equipment and controller associated with the engine.2 The remote control of electrically driven turning gear shall be so designed that the gear motor stops immediately. They shall be so arranged that they cannot be connected in parallel. Fans 6.3 2. 6.1 Electric starting equipment for main and auxiliary engines General 6. 2.2 a) Emergency generator sets Each emergency generator set that has to be started automatically shall be equipped with a GL-approved starting device with sufficient power for at least three successive starting operations even at an ambient temperature of 0 °C. see Section 14. two starter batteries mutually independent are to be provided. see Section 12. 5. H. is permitted.3. 6. Each battery shall be capable of starting the main engine from cold condition. Due to this recommendation the requirements of Section 5. The use of the main engine starter batteries. I.1 See also the GL Rules for Machinery Installations (I-1-2). Section 1. heating shall be provided to ensure starting of the generator sets.1 Auxiliary engines Main generator sets 3.and extinguishing systems shall be clearly marked.I . See Section 4. For cable laying. If only one of the auxiliary engines is started electrically.8. should the need arise. 5. This requirement can 5. Section 2. Pumps discharging overboard The motors of pumps discharging overboard and whose outlets are located in the lifeboat launching area above the light waterline shall be equipped with switches next to the launching station of the lifeboats. if there are any. D. See Section 4. 1. at least two mutually independent batteries shall be provided.Part 1 GL 2011 Section 7 D Power Equipment Chapter 3 Page 7–5 1. Maintaining and monitoring of the charge-condition of the batteries is to be ensured.4 The turning gear shall be equipped with a device which prevents the diesel engine from being started as long as the turning gear is engaged. if the switch or pushbutton is released.3. control stations and machinery rooms shall be capable of being switched off from an easily reachable position as safe from fire as possible and located outside the spaces to be ventilated. service spaces. C. Additionally a second source of energy is to be provided capable of three further starting operations within 30 minutes. D.1.1. If main engines are started electrically. The total capacity of the starter batteries shall be sufficient for the following number of starting operations to be carried out within 30 minutes without recharging: – – reversible main engines: 12 combined reversal and starting operations non-reversible main engines: 6 starting operations 6.1 Regarding additional requirements for diesel engine starting equipment see the GL Rules for Machinery Installations (I-1-2). Turning gear If several auxiliary engines are started electrically. 4. . 6. Fuel pumps and separators Controls shall be provided to enable the electric motors of fuel pumps and fuel and lubricating oil separators to be stopped from outside the spaces concerned. cargo spaces. 5.6 are to be observed. I.3 The switches at the main and emergency switchboards required for the power supply to all units forming part of the alarm.1. 5.
The device shall be connected in such a way that.g.Chapter 3 Page 7–6 Section 7 E Power Equipment I .6 times the rated torque for 2 minutes without dangerous overheating. an electromagnetic release shall be fitted which is so adjusted that the drive is disconnected when the maximum torque of the anchor windlass is attained. If a second source of starting energy is a mechanical starting facility.1 Deck Machinery General Type of enclosure The degree of protection for motors and switchgear shall be selected in accordance with Section 1. D. The electromagnetic release may be dispensed with if the clutch and transmission gears are made so strong that jamming the windlass does not cause any damage. Tripping may be delayed for up to about 3 s in the case of threephase motors. as far as possible. In addition.2 Overload protection f) To prevent excessive overloading of the motors and. e. manual hydraulic or ignition cartridge starter. Table 1. the motor can be restarted only from the zero position. 2 .3 Control equipment Levers and handwheels for the control of lifting equipment shall return automatically to the zero position when released. which in case of overload causes shutoff of the motor after 2 minutes of operation at 1. 7. Standby circuits for consumers – 7. If a direct start by hand is not possible. c) If automatic starting is not a requirement.3. 1. . 6. the emergency fire extinguishing set shall be equipped with a GL-approved starting device capable of at least 6 starting operations within 30 minutes. Section 14. two of them carried out within the first 10 minutes. after tripping. an electronical speed governor. the gears. an electronical speed governor. These equipment is intended for the operation of emergency generator sets only and shall not be used for other purposes.3 If manual starting by hand crank is not possible. The motors shall be able to deliver 1. These back-up sources shall be monitored. a time-delayed overcurrent protection shall be provided. Brakes shall be released automatically if the power supply fails. Emergency fire extinguishing sets E. 1. electrical overload protection shall be provided as follows: – Unless the motor is not protected against overheating by winding temperature monitoring. manual initiation of the starting process is acceptable. unless the kind of operation for which the ship is intended imposes more stringent demands. If mechanical starting facilities are provided. 7. Changeover to another unit due to a fault shall be signalled optically and audibly.5 times the rated torque. even at an ambient temperature of 0 °C. 1. associated protection devices and valves shall have two independent back-up power supplies.1 Anchor windlasses and capstans Rating of motors d) e) Motors shall be rated in accordance with the GL Rules for Machinery Installations (I-1-2).Part 1 GL 2011 be cancelled if the set can also be started manually. starting equipment which ensures safe manual starting is permitted.2 Automatically controlled groups of consumers shall be so structured that a fault in one group does not affect the functioning of other groups.10. 2.4 for short. b) To guarantee availability of the starting devices it is to be ensured that: – – electrical and hydraulic starter systems are supplied from the emergency switchboard compressed-air starter systems are supplied via a non-return valve from the main and auxiliary compressed-air or by an emergency air compressor supplied with power via the emergency switchboard the starting.2 Emergency shut-down – Lifting gear shall be equipped with an emergency switch which allows to stop the drive immediately. 1.term duty (S. should the control system fail. 2. springpowered starter. starting devices as in a) and b) shall be provided. associated protection devices and valves shall have a back-up power supply independent of the first source of starting energy. 2. charging and energy storage equipment is located in the emergency generator room. Exceptions may be allowed for trawl winches and for special-purpose drives. by hand-crank. This back-up source shall be monitored.1 Standby circuits shall be provided for the reciprocal operation of consumers with the same function.30 min).
Cargo winches and cranes – – – indicator showing whether the system is in operation optical/audible fault indication inclination angle indicator 3.I . 1. 1. stored mechanical power or other manual means. Systems which are also operated without supervision shall be provided with a manual emergency OFF switch and an automatic stop device which shuts down the system independently of the control when the maximum permitted angle of inclination is reached.2. Reference is made to the GL Guidelines for the Construction and Survey of Lifting Appliances (VI-2-2). The connection box shall be provided with automatically power change-over and shall be installed close to the launching equipment. Section 28. 2.3. Passenger vessels see Section 14.1 Space heaters shall be designed and mounted in such a way that combustible components are not ignited by the heat generated. The system shall be centrally controlled and monitored. The position of each closing device shall be indicated on the bridge and at the central operating location. 4. G. 3. F. Electrical Heating Equipment and Heaters Space heating 5. Oil and water heaters H. 3. Controls shall be protected against unintentional use. 1. Section 11. The following facilities are to be provided: .2 For reasons of fire protection. Chapter VI. P. a local emergency Stop device shall be installed. Control and indication of the closing devices shall be realized without computer technique. C. Section 7 and 7b. 4. J. These are subject to the provisions of Section 20. and the GL Rules for Machinery Installations (I-1-2). They shall not suffer damage due to overheating. and Machinery Installations (I-1-2).1.6.7. 1. particular attention shall be paid to the special instructions regarding the fitting and mounting of each unit. Heel-Compensating Systems 1. the launching appliance shall be connected both to the ship's main and emergency power supplies.4. If the secondary launching appliance is not dependent on gravity. 2.1). G. The control console shall be provided with a manual emergency OFF switch for ships which are operated only under supervision.Part 1 GL 2011 Section 7 H Power Equipment Chapter 3 Page 7–7 – The electromagnetic release is not required in electrohydraulic drives where the maximum torque is limited by a safety valve. Cross-flooding Arrangements 1. According LSA Code. Automatic stop devices and control units for heel compensation systems are subject to mandatory type approval. see Section 20. J. Where closing devices are installed in crossflooding arrangements. 4.2.3 For the construction of this equipment. In case of danger for persons by working with stabilizers. Free fall lifeboat launching equipment 2. 6. they shall be capable to be operated from the bridge or from a central location (see also the GL Rules for Hull Structures (I-1-1).
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