OHL Authorised Person Appreciation Flashcards
Why are you here today?
For my Appreciation of the role of Authorised Person to allow me to develop my understanding and knowledge leading to NSI 4 SAP under NSI 30.
What is OA 1?
OA1 Written authority to carry out the following operations when NOT in a zone
established by Point(s) of Isolation:-
•To render interlocks inoperative
•To operate non-interlocked Equipment from the Local Control Point
The OA1 shall be accompanied and checked by an Authorised Person with Operational Authority OA2.
What is OA 2?
OA2 Written authority to carry out the following operations:-
1. To accompany and check that the instructions for rendering interlocks
inoperative are implemented on the correct Equipment and carried out
in the right sequence by the instructed person
2. To accompany and check the operation of non-interlocked Equipment
from the LOCAL Control Point
3. To operate non-interlocked Equipment from the Substation Control Point
What is OA 3?
OA3 Operation of fully or partially interlocked Equipment from the Local Control
Point, Substation Control Point, and Remote Control Point.
What do you understand a remote control point is?
Anywhere away from the sub/TNCC mainly.
What is NSI 1?
Purpose and Scope
To apply the principles established by the Safety Rules and provide guidance on National
Safety Instruction 1, when carrying out operational and safety Switching operations on
Equipment.
These procedures have been developed to minimise human error incidents by ensuring that:
The requirements of the Control Person(s) are accurately and unambiguously conveyed to the recipient of the Switching Instruction.
The recipient executes the Switching instruction exactly as instructed, without distraction or undue delay
The layout of this guidance note reflects that of legislative codes of practice, where the rule (or mandatory obligation) is identified by a green panel on the left-hand side. The guidance follows after the rule and is identified by a blue panel.
Within National Grid, guidance notes hold equivalent status of an Approved Code of Practice (ACOP) in law.
What is NSI 2?
To apply the principles established by the Safety Rules and provide guidance on National Safety Instruction 2, on the use of Earthing Device(s) to achieve Safety from the System for Personnel working on or near to High Voltage Equipment in substations.
Earthing is carried out as part of the application of safety precautions. It protects Personnel against the effects of inadvertent energisation and Equipment that may be Charged.
The layout of this guidance note reflects that of legislative codes of practice, where the rule (or mandatory obligation) is identified by a green panel on the left-hand side. The guidance follows after the rule and is identified by a blue panel.
Within National Grid, guidance notes hold equivalent status of an Approved Code of Practice (ACOP) in law.
In your own words describe the policy
The Company Group Policy Statement on Safety and Occupational Health” is supported by “A Safe Way of Working” policy statement.
National Grid operate primarily to the Health and Safety at Work Act 1974. It also takes account of standards and best practice to improve safety behaviours.
maintain high standards of safety and occupational performance.
There is a requirement to meet, and exceed the requirements of health and safety legislation and policies.
These Rules have been formulated taking into account principally the Electricity at Work Regulations 1989 and the Management of Health and Safety at Work Regulations 1999.
The Company has statutory and moral responsibilities for ensuring our assets are designed, constructed, operated and maintained to standards.
Protecting the safety, health and welfare of National Grid employees and others who work for National Grid is of prime importance. It is National Grid’s responsibility to conduct operations in ways that are most protective of public safety.
The successful execution of the Policy relies on all employees complying with safety requirements relevant to their responsibilities.
Why do we work to E@work regs?
work dead
isolation and earthing
red pennants applied to live side crossarms
competent people for defined tasks
Why do we work to the M of H&S@work regs?
It covers Risk assessment, method statements and competent people for defined roles
What category of work is switching and why?
Cat 2
Pre-assessed by an SAP
Not set to work by an SAP
AP is his own General safety
What would you be doing before starting work switching?
SSRA
Look for excavations, LAC/PFW demarcation, equipment in distress, stolen earth tapes.
What is the Risk assessment controls hierarchy?
Eliminate Reduce Isolate Control PPE Discipline
In your own words describe the Philosophy?
The Company has an electromechanical system.
This system contains inherent dangers but are designed so that when operated normally they are safe.
When work is to be carried out on, or near to, these systems, Rules need to be specified to achieve safety from the inherent dangers.
Safety Rules protect persons from the inherent dangers. This is achieved by making them “safe from the System”.
The Rules define procedures for achieving this;
a) Making available the Equipment concerned for the work.
b) Establishing safe conditions for work. This can be achieved by either limiting the scope of the work or Isolation from a System.
c) Authorising the commencement of work.
d) Receiving the authority to commence work, executing the work, supervising safety during the work and clearing the authority when the work is terminated.
e) Cancelling the authority on termination of the work.
f) Restoring the system to normal.
The Rules will be supported by National Safety Instructions and Guidance Notes.
What is an electromechanical system?
Equipment that the safety rules apply to, connected together to generate, transmit and distribute electricity.
Is the substation office part of the system?
No
AMBP 310 Cat 3 work
What are the inherent dangers?
System derived hazards
Electric shock
Burns
Effects on eyes
When establishing safe conditions for work, who is responsible for each stage?
CPO make available CPO1 - CPS1 via SSC CPS1 - AP for normal switching OA3 SAP for PPE's CPS1 - SAP for safety document
How do we establish who owns what? and what does it say on it?
Site responsibility schedule
who’s rules/equipment/maintenance/ownership
What other dangers need to be managed?
General safety safe access/egress safe systems of work safe environment safe place of work correct PPE
In your own words describe the principles?
a) The Rules are only concerned with achieving safety for persons.
b) Primary means of achieving safety is by Isolation. Where practicable the Isolating Devices shall be Locked. In the case of High Voltage Equipment, this shall be followed by earthing. Where reasonably practicable the Earthing Devices shall be Locked.
c) Approved specialised procedures shall be required for work where Isolation is not reasonably practicable, or where normal Isolation procedures cannot be applied. (G3 also)
d) Persons shall be formally appointed to carry out defined duties.
e) Application shall ensure that safety is maintained across all internal and external control boundaries and interfaces. (G2 also)
f) The achievement of Safety from the System will involve one or more of the following functions; Control, Making Safe/Restoration of Equipment, and Work. These three functions cover different responsibilities which are treated separately in the Rules. The Rules do not preclude one person from performing all three functions.
Define SHALL?
When ‘shall’ is used in these Rules with no qualification, this indicates a mandatory requirement. No discretion is permitted and no judgement can be made
Define SHALL where practicable?
When ‘shall, where practicable’ is used to qualify a requirement, a slightly less strict standard is imposed. It means that where it is possible to achieve, in the light of current knowledge and invention, then the requirement shall be met. To avoid the requirement on the grounds of difficulty, inconvenience or cost is
not allowed.
Define SHALL where reasonably practicable?
When ‘shall, where reasonably practicable’ is used to qualify a requirement, then a judgement shall be made as to what is reasonable. This shall take into account an assessment of the magnitude of the risk on the one hand and the cost, time and trouble, and effort necessary for averting the risk on the other hand.
