Section 6 Control and monitoring
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 5 Gearing - Section 6 Control and monitoring

Section 6 Control and monitoring

Parent topic: Chapter 5 Gearing

6.1 General

6.1.1 Control engineering systems are to be in accordance with Pt 6, Ch 1 Control Engineering Systems.

6.1.2 All main and auxiliary gear units intended for essential services are to be provided with means of indicating the lubricating oil pressure supply to them. Audible and visual alarms are to be fitted to give warning of an appreciable reduction in pressure of the lubricating oil supply. Further, these alarms are to be actuated from the outlet side of any restrictions, such as filters, coolers, etc.

6.2 Unattended machinery

6.2.1 Where machinery is fitted with automatic or remote controls so that under normal operating conditions it does not require any manual intervention by the operators, it is to be provided with the alarms and safety arrangements required by Pt 5, Ch 5, 6.2 Unattended machinery, as appropriate. Alternative arrangements which provide equivalent safeguards will be considered.

6.2.2 Where machinery specified in this Section is required to be provided with a standby pump, the standby pump is to start automatically if the discharge pressure from the working pumps falls below a predetermined value.

6.2.3 Where a first stage alarm together with a second stage alarm and automatic shutdown of machinery are required in the relevant Tables of this Section, the sensors and circuits utilised for the second stage alarm and automatic shutdown are to be independent of those required for the first stage alarm.

6.2.4 Alarms and safeguards are indicated in Table 5.6.1 Main and auxiliary gear units: Alarms and safeguards.

Table 5.6.1 Main and auxiliary gear units: Alarms and safeguards

Item Alarm Note
Lubricating oil sump level Low —
Lubricating oil inlet pressure * 1st stage low Slow-down
Lubricating oil inlet pressure * 2nd stage low Automatic shutdown
Lubricating oil inlet temperature * High —
Thrust bearing temperature * High Slow-down

Note For transmitted powers of 1500 kW or less, only the items marked * are required.

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