1.0 PURPOSE:
2.0 SCOPE:
This procedure for electrical safety applies to all the equipment’s and buildings connected with electrical power supply of all departments at (Company name).
3.0 DEFINITIONS:
3.1 Primary Energies:
3.1.1 Primary energy is energy embodied in sources where human induced extraction or capture, with or without separation from contiguous material, cleaning or grading, must be undertaken before the energy can be traded, used or transformed
Examples:
A. Electrical
B. Hydraulic (fluid under pressure)
C. Pneumatic (air under pressure)
D. Gas/water/steam/chemicals (in piping systems).
E. Multiple energies (any combination of the above).
3.2 Secondary Energies:
3.2.1 Secondary energy is energy embodied in commodities that comes from human induced energy transformation.
Examples:
Mechanical motion (Rotation)
Gravity
Stored mechanical energy (springs).
Residual electricity (in capacitors, or batteries)
Residual pressures (fluids, air, gas, steam, chemicals)
3.3 Disconnector:
3.3.1 In electrical engineering, a disconnect or isolator switch is used to make sure that an electrical circuit can be completely de-energized for service or maintenance.
4.0 RESPONSIBILITY:
4.1 Engineering Technician or any person(s) whoever is performing an activity which is related with electricity has to follow this SOP.
4.2 Engineering Executive shall check that the activity is done as per SOP.
4.3 Concern department shall ensure the cleanliness of the place.
4.4 Head of Engineering/Designee shall ensure its compliance.
5.0 PROCEDURE:
5.1 Power supply (energy) isolation and safety:
5.1.1 Before disconnecting (primary energy) power, ensure that the machine/equipment is not in operation. Make sure that the machine/equipment is shut ‘OFF’ at the operating controls.
5.1.2 Before disconnecting (primary energy) power, ensure that the machine/equipment is shut down in its safe position, if applicable.
5.1.3 The (disconnect) lsolator/ Fuse switch unit / Air circuit breaker / Molded case circuit breaker / Miniature circuit breaker / Switch operating handles must be locked in the ‘OPEN’ or ‘OFF’ position.
5.1.4 Place the ‘Under Preventive Maintenance’ / ‘Under Breakdown Maintenance’ board as applicable on the feeders, remote push button stations and on equipment.
5.1.5 Verify security of (disconnect) Isolator / Fuse switch unit / Air circuit breaker / Molded case circuit breaker / Miniature circuit breaker / Switch operating handles, and lock them with lock and the key to be kept in the safe custody of person performing maintenance.
5.1.6 Operating controls must never be used for power lock out.
5.1.7 If lock out cannot be done it must be reported to the engineer-in-charge, and the job must be carried out after proper power isolation.
5.1.8 Manually operate all applicable Start / Stop switches, buttons and control switches whose power has been isolated / switched-‘OFF’ and locked.
5.1.9 Look for movement, lights, motor start-ups and unusual sound.
5.1.10 Check voltage with voltage testing equipment, if appropriate.
5.1.11 Check and ensure effectiveness of neutralization of stored energy.
5.1.12 Start and complete the assigned job.
5.1.13 After completion of the work and when the Equipment / Machine is ready for re- energizing, check the machine, remove materials, tools, equipment and trash.
5.1.14 Make sure that all the personnel are cleared from the machine and are at a safe distance.
5.1.15 Make sure all Guards, Fencing and Safety Devices are in place.
5.1.16 After a thorough recheck remove your locks from the disconnect.
5.1.17 Remove the ’Preventive Maintenance’ / ’Breakdown Maintenance’ board and energize the panel / Equipment.
5.1.18 After energizing, the equipment may be tested for correct operation.
5.1.19 If the machine / equipment runs properly, hand over to the respective user / department.
5.1.20 If the performance is not satisfactory, the Power Disconnect and Lock
5.1.21 Out Procedure must be repeated before performing further work on the machine/equipment.
5.1.22 Get the area cleaned thoroughly before leaving.
5.2 Extra Precautions for electrical safety:
5.2.1 Do not use test lamp, line tester and insulation tester (Megger) in the flameproof area?
5.2.2 If multiple works are being carried out, multiple locks for disconnect must be provided by the individual performing the tasks and the keys must be at the safe custody of each individual performing the operations.
5.2.3 After completing the job and satisfactory trials, clean the work area.
6.0 ABBREVIATIONS:
SOP – Standard Operating Procedure.
ENG – Engineering Department.
HSD – High Speed Diesel
7.0 REFERENCES:
Nil.
8.0 LIST OF ANNEXURES:
Nil.
Also read: Procedure for hydrostatic test for pipe lines
Also read: Procedure for calibration of dosing pumps