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What is the SPR?
Safety practice Regulations
The rules that govern work to be done by or for BC Hydro
What is PPE
- Personal Protective Equipment
- safety toe boots
- FR clothing
- hi-vis clothing
- hard hats
- hearing protection
- eye protection
What are the Limits of Approach?
The distances that shall be maintained between workers (including their tools) and exposed energized electrical conductors and equipment by voltage level.
Who can work in Column 1 LOA?
Absolute limit of approach for qualified workers.
Two or more workers, short duration with a detailed plan.
Who can work in Column 2 LOA?
Normal limit for qualified workers.
Who can work in Column 3 LOA?
Qualified specially trained
uninsulated equipment operated by qualified workers
Unqualified workers when directed by a qualified worker
Who can work in Column 4 LOA?
Unqualified workers and their equipment.
Who may trim or clear trees closer to high voltage lines than the distances specified in Column 4 of the Limits of Approach?
- Certified Utility Arborists
- Qualified electrical workers
What are the rules for workers shall trimming or clearing vegetation where there is contact, or the possibility of contact, between such vegetation and an energized high-voltage line? Explain fully.
- Only qualified electrical workers
- A Live Line Permit shall be in effect for the duration of the work
- Step and touch potential shall be taken into consideration
In proximity to 60kV or above, removing trees within the Absolute Limits of Approach an SPG must be in place and Worker Grounding/Bonding applied.
Certified Utility Arborists may engage in tree trimming and clearing near energized conductors under what following conditions?
Workers shall be authorized and shall obtain and Assurance of No Reclose Permit from the PIC
The PIC shall establish any required operating conditions before the work proceeds
When must a Live Line Permit be obtained?
Before any work is carried out on energized conductors or equipment
- Application of removal of hot taps
- Installation or removal or approved bolt-on stirrups to conductors #2 or larger
- Application or removal of stick mounted ammeter
What are phasing tests and when should they be done?
- When conductors or equipment are being connected where incorrect phasing could occur, “phasing” tests should be used.
- Such as replacing pothead jumpers or risers or UD switching.
During work involving a Live Line Permit, the workers protections depends on?
proper work practices and approved, tested, and well maintained live line tools
A Live Line Permit provides no personal protection in case of direct contact with an energized conductor or equipment by a worker.
Explain the 6 rules associated with Live Line permits.
1. Before electrical journeymen begin live line work or hazardous tree trimming near energized lines, they shall obtain a Live Line Permit from the PIC.
2. Only qualified electrical workers shall be authorized to receive a Live Line Permit.
3. Before, issuing a permit, the PIC shall make arrangements to prevent immediate re-energizing of the circuit or equipment (including any required Guarantees of No Reclose from other operating authorities), and shall retain Operating Authority over all reclosing devices.
4 The PIC shall have a means of direct communications with the permit holder.
5 In case of de-energization, the PIC shall contact the permit holder before the circuit or equipment has been de-energized by other than its own protection or the cause is verified by a qualified person.
6 When a Live Line Permit is in effect, the circuit involved shall not be paralleled without notifying the permit holder.
Explain the 4 rules associated with Assurance of No Reclose permits.
1 An ANRP is issued by the PIC to qualified electrical or non-electrical workers for work near energized conductors or equipment when it is required that reclosing not occur if automatic tripping takes place. Issued by the PIC to qualified workers.
2 Before issuing an ANRP, the PIC shall make arrangements to prevent immediate re-energizing of the circuit or equipment (including any Guarantees of No Reclose from other operating authorities), and shall retain Operating Authority over all reclosing devices.
3 The PIC shall have a means of direct communications with the permit holder.
4 In case of de-energization, the PIC shall contact the permit holder before the circuit or equipment is re-energized, unless the circuit or equipment has been de-energized by other than its own protection or the cause is verified by a qualified person.
What must not be done without approval from the person with Operating Responsibility?
No work, including switching, shall be done on any conductor, electrical equipment, or mechanical equipment without prior arrangement with, and approval of, the person with Operating Responsibility for the conductor or equipment, unless the equipment is not identified on the operating one-line diagram and does not adversely affect the Power System.
What are the duties of the Person In Charge per the SPRs?
1 The PIC coming on duty will be familiar with all operating conditions and will understand all details necessary to operate the assigned portion of the Power System.
2 Before taking charge, the relieving PIC must not take part in the operation of the assigned portion of the Power System except under instruction from the PIC still on duty.
What must be treated as energized?
All high-voltage conductors and electrical or mechanical equipment that may be operated or energized by conventional means or by backfeed shall be treated as energized unless a Clearance, Test and Work Permit , Self Protection, or Lockout is in effect and Worker Protection Grounding/Bonding or blocking has been applied on such conductors or equipment.
What identification must workers use when referring to the power system?
High-voltage lines, equipment, and stations shall be identified by a _unique numeric or alphanumeric_ identifier and workers shall use this identification at all times when referring to them.
What are the rules associated with a GOI per the SPRs?
1. The PIC may receive or issue a GOI to establish part of the isolation for work protection.
2. Within the BC Hydro Power System, the PIC who issues or receives a Guarantee of Isolation shall use a Safety Protection form or a Safety Protection Record form to record the conditions established.
3. The isolating devices for the portion of the system for which the Guarantee of Isolation is issued shall be secured using "Do Not Operate-Guarantee of Isolation" tags.
What are the rules associated with Operating Communications Protocol?
- When issuing instructions make certain that they are specific and follow the intended sequence of operation
- Repeat-back procedures
- Clear precise terms
- Unique identifier
When can an isolating device identified on an operating one-line diagram be operated without the permission of the person with Operating Responsibility.
If there is an emergency, an isolating device can be operated when there is risk or injury or death.
Whose responsibility is it to ensure the worker doing the switching is qualified and authorized and understands the switching sequence.
The person with Operating Responsibility.
What should a worker check before operating a disconnect switch?
semaphore position of adjacent circuit breakers
A disconnect switch shall not be used to..
break load, magnetize or parallel current, or pick up load unless it is known that the disconnect switch is adequate for the intended purpose.
Explain the approved operation for opening a manual disconnect switch that can be inched open.
The approved operation for a manual disconnect switch that can be inched open is:Slowly open the switch until the blades just part to determine if there is any arcing.If arcing is unacceptable, quickly close the switch and tell the person who ordered the switching.If arcing is acceptable, open the switch with a continuous swift motion. Visually check that all blades are properly closed.
Explain the approved operation for opening a manual disconnect switch that cannot be inched open.
When operating a disconnect switch that cannot be inched open, use a continuous swift motion and then visually check that all blades are fully open.
Manually and electrically operated switches...
that are provided with locking facilities shall be locked in the appropriate position.
Explain the rule associated with operating voltage regulator bypass disconnects.
Bypass disconnect switches of voltage regulators will only be operated if:
The automatic control is in the off position.
The regulator has been verified by two methods to ensure it is in the neutral position.
What must an electrical isolation point have?
visual separation (all phases of a conductor or bus cut, disconnect, or multi-breaker are open), except where a CSA approved transfer switch or a rack-out breaker is used.
What is the purpose of applying Worker Protection Grounding/Bonding?
Create an equipotential zone
- Protect against:
- accidental energization
All high-voltage conductors and electrical equipment shall be treated as energized unless one of the following conditions is in place,
A Safety Protection Guarantee (SPG) is held, the workers has verified that there is no system voltage, and Worker Protection Grounding/Bonding has been applied.
The conductor or equipment has been isolated, a worker has verified the isolation, including checking for no system voltage, Worker Protection Grounding/Bonding has been applied, and lockout has been established.
Why is it important to create an equipotential zone?
to eliminate step and touch potential
What are the three types of positive Safety Protection Guarantees?
- Clearance (including Protection Extension)
- Test and Work Permit
- Self Protection
How are Safety Protection Guarantees enforced?
“Do Not Operate” tags enforce Safety Protection Guarantees.
What are the workers responsibilities after receiving a Safety Protection Guarantee?
Workers are responsible for verifying isolation, applying Worker Protection Grounding/Bonding and/or blocking before starting work on high voltage conductors or equipment.
What is a Clearance? Who can receive a Clearance?
A clearance is an assurance that one or both is true:
A conductor or electrical equipment is isolated and it is safe to apply Worker Protection Ground/Bonding then work.
A piece of mechanical equipment is isolated, and it is safe to apply blocking then work.
A worker authorized to PSSP category 5 or 6 can receive a Clearance.
A Clearance shall not be issued on a line or equipment on which a Test and Work Permit has been issued.
What is the procedure for extending a Clearance to another worker? What type of worker can the Clearance be extended to?
Make sure the existing Clearance is appropriate for the work to be done.
On the Safety Protection Record form, fill out the name of the worker, time and date.
Inform the worker receiving the protection of the hazards involved.
After completion, ensure worker holding the Protection extension and crew to stay clear of lines and equipment.On the Safety Protection Record form, have the worker sign and record the time and date of return
A Clearance extension can be issued to a worker authorized to PSSP category 3 or higher. For a worker authorized to PSSP category 3 or 4, direct and personally observe the worker applying any Grounding/Blocking Protection tags they may require.
Because of the hazard of backfeed from station voltage transformers (VTs) and Station Service transformers, for work within station perimeters, a Clearance shall not be issued unless...
The transformers have been rendered safe against backfeed. This is done by opening secondary knife swtiches, removal of drawout gear, removal of fuses, short-circuited by attachment of an adequate secondary short circuit near the transformers terminals
Within a zone covered by a Clearance, the following procedures arepermissible, provided the PIC has been informed
Operating a disconnect switch for adjusting purposes as long as the disconnect switch is not one of the Clearance isolation points and both sides of the disconnect switch are bonded together and grounded.
Operating a circuit breaker provided no hazardous electrical or mechanical tests are required and there is Worker Protection Grounding/Bonding.
What are the responsibilities for a worker requesting a Clearance?
Give their name and request a Clearance.
Clearly state what line or equipment that you require isolated and the purpose for the isolation.
For station work, discuss the location of hazards using station diagrams and drawings. If desired, ask to have the locations shown to you.
What are the responsibilities for a PIC issuing a Clearance?
Get the name of the worker asking for Clearance, the type of work to be done, and the exact designation of lines and equipment to be isolated.
Ensure there is no Test and Work Permits in place and that the worker is authorized to receive a Clearance.
Arrange isolation for the lines and equipment with “Do Not Operate-Clearance” tags on isolating devices and mimic displays to establish the protective conditions.Log the switching steps.
If the switching sequence contains three or more steps, the PIC should use a Switching Order and shall record the Switching Order number in the Log.
Complete the Safety Protection form, including all the isolation points that establish the Clearance. Record the clearance number, designation of lines and equipment, and the date and time.
Tell the worker requesting the Clearance that the line or equipment is isolated and state the Clearance number.
What are the responsibilities for a worker receiving a Clearance?
1 After being notified that the required conductor or equipment is isolated and you are given the Clearance number, complete the Safety Protection Record form, marking it as a Clearance and recording the number.
2 Warn all workers under the Clearance to maintain limits of approach until Worker Protection Grounding/Bonding is in place.
What are the responsibilities for a Clearance holder issuing a Protection Extension?
1 A Protection Extension from an existing Clearance can be issued to a person with PSSP category 3 or higher.
2 Ensure the Clearance is appropriate for the work being done.
3 Fill out the name of worker receiving the extension, time, and date on the Safety Protection Record
4 Inform the worker of the hazards involved. If necessary install barriers. For a PSSP 3 or 4 worker, direct and observe the worker applying Grounding/Blocking Protection tags.
5 Inform the worker they may proceed
6 After work is completed, ensure the worker with the Protection Extension has told their crew to stay clear of lines and equipment. For category 3 or 4 workers, direct them to remove any Grounding/Blocking Protection tags.
7 Have the worker sign and record the date and time on the Safety Protection Record form.
What are the responsibilities for a worker returning a Clearance?
1 Ensure all workers and equipment are clear.
2 Advise workers under your Clearance that the conductor and equipment is to be treated as energized and to stay clear.
3 Report to the Clearance Issuer. State your name, Clearance number, state all your workers under your clearance are clear and have been warned to stay clear of the conductor and equipment. State whether or not Protection Grounding/Bonding or blocking that was placed was removed and if the line or equipment is ready for service.
4 Sign the Saftey Protection Record form and record the date and time.
What are the responsibilities for a PIC accepting the return of the Clearance?
1 Obtain the Clearance holder’s name, Clearance number, proper designation of the conductor or equipment on which the Clearance holder and crew have been working, and a statement that all workers under the Clearance are clear and have been warned to stay clear. Determine whether or not Worker Protection Grounding/Bonding or blocking has been removed and if the conductor or equipment is ready for service.
2 Record in the log the Clearance number and the exact time of the Clearance return.
3 Complete the Safety Protection form.
4 Direct removal of Clearance tags connected with the Clearance.
How is a Test and Work permit different from a Clearance permit
No Protection Extension
Only one test and work at a time and no Clearance on the same portion of the power system
Can remove grounds
Fully explain a Self Protection permit? How is a Self Protection different than a Clearance?
Self Protection is a Safety Protection Guarantee. A category PSSP 5 or 6 worker can take out a Self Protection on level V equipment which does not require a Clearance or Test and Work Permit.
Self Protection can include auxiliary sources to equipment, high voltage distribution lines where loops or multiple feeds do not exist. (level 5)
Can more than one Self Protection be in place on a high voltage distribution line isolation point?
Only one Self Protection can be placed on a high-voltage distribution line isolation point or Clearances have to be issued. Self Protection can not be extended to another worker.
Who can remove a Self Protection tag? What if that person is not available?
The Self Protection tag can only be moved by the person that applied it. If they are not available, the matter is referred to the senior manager.
Explain Customer Isolation.
BC Hydro can apply customer isolation to customer systems below 60 kV that are applied from a single BC Hydro feed and have no customer infeeds.
PSSP category 5 or 6 BC hydro workers can only apply customer isolation.
Fully explain the Requirements for Tags
1 Do Not Operate Tags:Enforcing tags applied only be authorized workers to establish and maintain protection of :
- a Do Not Operate – Clearance
- Are used for Clearance and Protection Extensions.
- B Do Not Operate – Test and Work Permit
- For Test and Work Permits. Only one set of tags are allowed on one conductor or equipment at a time.
- C Do Not Operate – Self Protection
- Are used for Self Protection when a Clearance or Test and Work permit are not required.
- Each Do Not Operate – Self Protection tag shall have the workers name that applied it.
- D Do Not Operate – Customer Isolation
- Are used for Customer Isolation of customer conductors or equipment below 60 kV that are supplied from one BC Hydro feed and no customer infeed exists.
- E Do Not Operate – Grounding/Blocking Protection
- Are used on Worker Protection Grounding/Bonding and blocking devices when they are not under the immediate and exclusive control of the Safety Protection Guarantee holder.
- F Do Not Operate – Guarantee of Isolation
- Are used to secure Guarantees of Isolation
- 2 Caution Tags
- Used to warn of a condition that may lead to service interruption, unusual situation, or need a special operating procedure.
- Not a permit.
- Caution tag should include a description of the condition or a reference to where more information can be found.
- Caution tags are not used to allow work that could result in an unsafe condition if the equipment the Caution tag is applied is operated.
- 3 Grounded Tags
- Grounded tags are used on the PIC’s mimic display to indicate Worker Protection Grounds are on conductors or equipment that remain isolated when no Safety Protection Guarantee is in effect.
- 4 Live Line Permit Tags
- Live Line Permit tags are used on the PIC’s mimic display to indicate that a Live Live Permit is on a conductor or equipment.
- 5 Assurance of No Reclose Permit Tags
- Assurance of No Reclose Permit Tags (ANRP) are used on the PIC’s mimic display to show that an ANRP is in place.
- 6 Guarantee of No Reclose Tags
- Guarantee of No Reclose is used on the PIC’s mimic display to show that a Guarantee of No Reclose is in place.
- 7 Reclose Off Tags
- Reclose off tags are used to show that reclosing is turned OFF for Live Line Permits, ANRP, and Guarantees of No Reclose, or other conditions requiring reclose to be off.Reclose Off tags should be placed on the reclose control on the field and the PIC’s mimic display.A Reclose Off tag is not required in the field when it is turned off by supervisory control.
- 8 Line Cut Tags
- Line Cut tags are used on the PIC’s mimic board to indicate a temporary line cut.
What is the SPR definition of Authorized?
Having been approved for specific access or work on the power system.
What is the SPR definition of Energized?
Source or potential source of electrical energy present.
What is the SPR definition of Guarantee of No Reclose?
A stated and duly logged guarantee between PIC's in different operating authorities that a recloser is turned off and will remain off.
A recloser will not operate manually or automatically.
What is the SPR definition of Isolated?
All sources of hazardous energy have been removed by opening all switches or by making a bus or line cut. (tag and lock if available)
What is the SPR definition of Operating Responsibility?
The right to exercise control over an assigned portion of the power system.
What is the SPR definition of a PIC?
The PIC (Person in Charge) has Operating Authority and Operating Responsibility for a portion of the power system.
What is the SPR definition of Qualified?
Accepted as satisfactory in education and training and in rules and practices.
What is the SPR definition of a Safety Protection Guarantee?
A stated assurance that a piece of equipment/conductor is isolated and will remain so.
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