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Flashcards in NSI 1 Deck (9)
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1
Q

What is operational switching?

A

Operation of equipment

  • under the Instructions of a CP (operations)
  • ensure safe operation of the system
2
Q

What is safety switching?

A

Operation of equipment

  • under the instructions of control person (safety)
  • to achieve SFTS
3
Q

Conditions not with scope of NSI 1

A
  • switching for purpose of site routines on
  • LV and Mechanical equipment
  • is not subject to requirements of NSI 1
  • shall be covered by site RAMS
4
Q

What are the 5 operation diagrams?

A

1 - operational diagram

2 - technical data sheet
- gives ratings of equipment

3 - gas zone diagram
- details / positions of gas barriers

4 - Gas zone alarm sheet

5 - over sailing hazards
- added since incident to provide details to CP(s) on site.

5
Q

What are the types of safety?

A

Process safety - protecting public safety and general environment from dangers arising from our process or activities.

General safety - covers everything else

6
Q

Before issuing switching instruction CP SHALL

A
  • consult CP of other systems that may be affected

- ensure HV EQUIPMENT not showing DBI Indication.

7
Q

How should instructions be recorded?

A

Legibly and indelibly

8
Q

Defeating the function of interlocks

A

When not WZE POI’s SAP authorised to OA1 and accompanied by AP authorised to OA2

SAP - shall ensure the substation running arrangement Is agreed with the control persons. This shall be established by a visual inspection of equipment.
- all staff, except accompanying AP, shall be clear of the area adjacent to the equipment prior to operation.

AP - as above

 - SAP informed they are on the correct equipment prior to operation.
  - witnesses and checks specified  switching operation as specified on instruction.
9
Q

POI’s metal clad + withdrawable VT

A
  • POI’s established VT SPOUT SHUTTERS locked caution notice attached.
  • fully rated CB , designed to earth the circuit via the VT spouts can be locked in the feeder earth position. Caution notice attached to CB locking bar or equivalent.