Table of Contents
1. Purpose
This procedure describes the division of responsibilities between the Electrical group and the Control Systems group and involves both specialist engineering as well as design functions.
2. General
The definition of the split of work and division of responsibilities as outlined in paragraph 3 and 4 shall be followed unless specific circumstances dictate otherwise. These deviations shall be properly recorded and routed within the groups task-forces.
For all technical details see reference 6.1.
3. Responsibilities
It is the responsibility of the electrical and control systems lead specialist engineer that this procedure is followed.
A meeting between the two groups to define the interface and extent of work shall be held immediately after project start.
Adequate information shall be exchanged between the groups to enable clear definition of the responsibilities resulting from this procedure.
For detailed requirements see reference 6.1.
4. Procedure
After the project "Kick-off" meeting the lead electrical engineer and the lead control systems engineer will arrange a coordination meeting to settle the split and responsibilities between the Electrical group and the Control Systems group.
Any deviations from this procedure, Attachment 1, will be recorded and the Control Systems guide, (ref.6.1) will be completed accordingly. Also impact on budgets will be checked and revised as required. The Control Systems guide, (ref.6.1) and any deviations from this procedure will be incorporated in the job instructions. After completion of the job instructions these will be issued.
5. Flowchart
6. References
Document
| Number | Title | Level | |
| 6.1 | BN-G-UE301 | Control Systems Guide for Interface Between Control Systems and Electrical Groups |
5 |
7. Attachment
1. Standard Split of Responsibilities
Standard Split of Responsibilities
The following areas of mutual involvement can be observed and the following procedures shall be followed:
Power Supplies
The Electrical group shall provide electrical power supplies dedicated for control systems, including emergency or standby equipment such as generators, inverters, batteries etc. including the power distribution boards for the control system users.
Control System cables leaving the distribution boards are the responsibility of the Control System group.
Note: Power supplies, distribution boards inside Control System cabinets are the responsibility of the Control Systems group.
Alarm Systems
Alarms associated with motors, switchgear and other electrical equipment and to be annunciated on instrument panels and/or in control systems are the responsibility of the Electrical group.
The control systems group will be responsible for incorporation of these alarms into their system(s) from the interface point as detailed for each project.
Measurement Systems
The measurement of power factors, frequency, power consumption and other typical electrical signals to be processed/handled in instrumentation systems is the responsibility of the Electrical group.
The Control Systems group will be responsible for incorporation of these measurements into their system(s) from the interface point as detailed for each project.
Electric Control Systems
Control Systems directly associated with motor starters, oil heaters, electric tracing and alike are the responsibility of the Electrical group.
The Control Systems group will be responsible for the detailed control, alarm, safeguarding requirements as shown on the P&ID's and passing all process signals required for electrical control to the interface point as detailed for each project.
Control and Interface Panels
Control panels for electric power, motor control, variable speed drives, uninterrupted power supplies, batteries and electrical tracing shall be the responsibility of the Electrical group.
All process control interlock, process safeguarding and interface panels shall be the responsibility of the Control Systems group.
The interface points shall be detailed per project and located in motor control cabinets, marshalling boxes, interface panels etc.
Communication Systems
Communication systems such as telephone, paging systems, radio communication systems, time recording systems, television, electric clocks, entry systems are the responsibility of the Electrical group.
Where for these systems space and monitoring in control systems panels is required adequate data shall be transmitted by the Electrical Group.
Telemetry systems and data communication systems are the responsibility of the Control Systems group, when only electrical data are being handled these systems will be the responsibility of the Electrical group.
Motorized ON/OFF valve and Signal System
Electric motor operated valves, complete with motors, integral starters, associated control system and power supply are the responsibility of the Electrical group.
The valves themselves shall be specified by the Piping Engineering group. The responsibility for the complete assembly will be with the Electrical group.
Process control and process safeguarding functions shall be advised by the Control Systems group.
Fire, Smoke and Gas Detection Systems
These systems will be the responsibility of the Control Systems group.
Cable Routing
Each group is responsible for engineering/design of their cable routing.
Where cable routing of electrical and control systems group are close to each other, or should run together, close coordination and communication shall take place to result in a sound design.
This coordination/communication shall also take place with other groups involved e.g. piping - underground - civil - structural.
Earthing
The main earthing, involving static earthing, protective earthing, lightning protection and instrument earthing systems are the responsibility of the Electrical group.
The provision of earthing facilities on and within instrument equipment and instruments and any specific shielding requirements are the responsibility of the Control Systems group.
Management Systems
State of the art motor management and power management system ("intelligent" switch gear) are the responsibility of the Electrical group. Since these systems will be integrated with Distributed and/or Other Control Systems close coordination and exchange of data and protocol agreement shall be established between the Electrical and Control Systems group.