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| METHOD STATEMENT FOR MAINTENANCE OF HV SWITCHGEAR, RMU, TRANSFORMERS, AND CAPACITOR BANK |
Table of Contents
6.0. METHOD STATEMENT/ WORK METHODOLOGY:
1.0. PURPOSE
The purpose of this method of statement is to
outline the sequence of activities involved and to provide the necessary
guidelines for the maintenance works done for the Capacitor Bank / Power factor
correction equipment at [Project Name/Location Name Here]
2.0. SCOPE
OF WORKS
2.1. Enclosure physical
conditions checked by visual inspection.
2.2. Removal of dust and
dirt.
2.3. Checking and
confirming the settings for stage-level operation.
2.4. Checking Wiring
insulation and checking that there is no evidence of overheating and excessive contact erosion.
2.5. Verify all circuit
breaker sizes and types correspond to drawings.
2.6. Check all lamp
indication functionality and replacement.
3.0. REFERENCE
DOCUMENTS
3.1. Contract Scope of
Works.
3.2. Existing drawings if
available.
4.0. RESPONSIBILITIES
Competent Engineer (PTW Person) (If available): -
4.1. Receive the PTW from
[HSE DOCUMENTS] Authorized Person and arrange the required tools
and materials.
4.2. Ensure the
availability of PPE for all the Personnel who are involved in the work.
4.3. Toolbox talk to be
conducted which must include the area of work; risk involved in the activity,
safety measures to be taken care of, emergency procedures, etc.
4.4. Ensure the Required
Drawings (If available), Materials, and Power are available at the Site before
starting the work.
4.5. Inform the site in
charge before entering the site and also before starting the actual work.
4.6. While accessing the
equipment if applicable firefighting system is to be kept in Manual mode.
4.7. Equipment must be
clearly identified (matching with PTW & equipment’s label).
4.8. Area of work must be
barricaded/identified by warning Tapes, Danger notices, etc.
4.9. Supervision of the
activities and control of all the persons working under him.
4.10. Ensuring that the
activities, areas of work, restrictions, etc. mentioned in PTW Safety documents
are strictly followed.
4.11. Supervising the
Works until removing all persons, tools & and tackles from the work
location.
4.12. While exiting the
site, change the firefighting system back to be in Auto mode if applicable.
4.13. Before leaving the
site inform the Authorized Person and site in charge directly/over the phone and
confirm the leaving time.
4.14. The above-mentioned
points from 4.2 to 4.13 are to be followed each day until work completion.
4.15. After completion of
all the works, inform to Authorized Person for Inspections and get clearance.
4.16. Returning the PTW
Safety document after the work's Successful Completion.
5.0.
TOOLS AND EQUIPMENTS
5.1. All kinds of Tool
Box with insulated tools
5.2. Erection tools &
materials as required
5.3. Megger
5.4. Multimeter
5.5. Required materials.
6.0.
METHOD STATEMENT/ WORK
METHODOLOGY:
Procedure to carry out the Works for the Capacitor
bank and Associated works:
6.1. Make the
arrangements for the Capacitor bank Shutdown and make sure there is no supply of live parts.
6.2. General cleaning:
clean equipment and surrounding areas.
6.3. Visual Inspection:
Check any damage in equipment, checking all the indications in the lamp and meters
are in working condition.
6.4. Checking the cable
connections.
7.0.
RECORDS
7.1 General Safety Precautions:
- Make sure the work area is clean, all floor openings
are closed & no imminent danger is available nearby e.g. open electrical
panel, exposed live part, electrical cable, overhead work, or other
construction activity.
- Provide barricades to the testing area & display
warning signs for another person working nearby.
Protect or provide insulating cover to all
energized parts & working:
7.1. Keep safe clearance
for live parts or installations.
7.2. Only authorized
personnel are to be allowed in the barricaded area of work.
7.3. Provide proper
working platform & access if required to work at height.
7.4. Use only
electrically insulated tools (insulation voltage should be higher than working
voltage).
7.5. Positive
verification of correct circuit/ installation/ panel/ cable on which work to be
carried out.
7.6. Sequence of method
statement to be followed up.
7.7. Check safe trip
function of the testing instrument is working properly.
7.8. Ensure proper lead
& clamps for the connecting wires.
7.9. In case of doubt, don't decide by yourself. Ask to authorize a person from [HSE DOCUMENTS]
7.10. Discharge the
residual charge after testing by short-circuiting with earth. Use the proper
insulating stick to the discharge.
7.11. Auxiliary power
supply for the test should be from an approved source of supply with ELCB protection.
(If required)
7.12. The test should not be
performed in a dusty environment. If required provide Air conditioning during the
test operation.
8.0.
HSE REQUIREMENTS
8.1. All HSE activities
related to the project shall be based on the Owner/Engineer’s approved Project
Specific HSE plan.
8.2. All PPE’s shall be
used during the execution of works.
8.3. Enclosed Risk
Assessment with clear identification to potential HSE hazards & proposed
control measures including the responsibility to implement the same.
9.0.
EMERGENCY PROCEDURES
Emergency Procedures for Maintenance of HV
Switchgear, RMU, Transformers, and Capacitor Bank.
9.1. Pre-Emergency
Preparation:
• Ensure that all
maintenance personnel are trained in emergency procedures and first aid.
• Conduct toolbox
talks focusing on electrical hazards, arc flash risks, and appropriate
responses.
• Display emergency
contact numbers for electrical supervisors, safety officers, and first
responders at the worksite.
• Establish a clear
isolation and lockout/tagout (LOTO) procedure to de-energize equipment before
maintenance.
9.2. Emergency Response
Plan:
9.2.1.
Electrical Shock or Arc Flash Incident:
-
Immediately cut off power to the affected area
using the nearest emergency stop button or isolation switch.
-
Evacuate the injured person from the immediate
danger zone, only if safe to do so.
-
Administer first aid (CPR for electrical shock)
while ensuring no risk of further exposure to live equipment.
-
Contact emergency medical services (EMS) and
report the incident to the site safety officer.
9.2.2.
Fire Emergency:
-
Use CO2 or dry chemical extinguishers designed
for electrical fires to combat any flames.
-
Activate the fire alarm system and evacuate all
personnel to designated assembly points.
-
Report the fire to local civil defense or fire
services.
9.2.3.
Gas Release or Explosion:
-
Immediately evacuate the area and avoid inhaling
gases, particularly sulfur hexafluoride (SF6) in switchgear.
-
Seal the area to contain the leak and prevent
further exposure.
-
Notify the emergency response team and civil
defense for immediate containment actions.
9.2.4.
Evacuation Procedures:
-
In the event of a fire, explosion, or major
equipment failure, trigger the alarm system and evacuate personnel to the
assembly points, following marked escape routes.
-
Designate a safe zone away from high-voltage
areas for first responders and safety officers to assess the situation.
9.2.5.
Reporting and Communication:
-
Notify the site safety officer and HSE department
immediately after any incident.
-
Submit detailed reports on the emergency event in
compliance with OSHAD standards and regulations.
-
Conduct a post-incident review to determine
causes and implement corrective actions to prevent recurrence.
9.2.6.
Standards and Compliance:
-
Comply with UAE OSHAD standards, particularly the
Electrical Safety Code of Practice.
-
Follow manufacturer guidelines for the
maintenance and operation of HV switchgear, RMU, transformers, and capacitor
banks.
-
Ensure that personal protective equipment (PPE)
such as arc-rated clothing and insulated gloves is worn at all times during
maintenance activities.
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