Page 395 - Offshore Electrical Engineering Manual

382 CHAPTER 6 Protection, Monitoring and Control

CONTROL AND MONITORING SYSTEM COMMISSIONING

It is essential that initially all outputs are inhibited before the start of commissioning.
The hierarchy of the installation’s systems must be borne in mind, so that systems
are brought online progressively. For example, generator prime movers will require
fuel (gas or liquid), cooling water, lube oil, inlet and outlet air ducting and filtration.
If the prime mover is to be load-tested with the generator, at least part of the electrical
system will need to have been commissioned and a suitable electrical load provided.

CAUSE-AND-EFFECT MATRICES

The control and monitoring should be checked by progressing through the cause-
and-effect charts line by line. Fig. 7.6.1 is a simple example of such a matrix.
It should be noted that complex systems may have cause-and-effect matrices
extending to many pages and may take a week or more to verify.
All input causes and output effects in each line need to be confirmed by checking,
for example, if valves have operated as expected. Once all causes and effects on the
line have been confirmed, a highlighter can be used to indicate that the line has been
checked. If an effect is found not to be present, then the actual effect and/or missing

FIGURE 7.6.1
Example of a cause-and-effect matrix.