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7/28/2019 CESU Safe Practice in Power Distribution
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Safe Practice in Power
Distribution
Swapan Dasgupta, CEO, CESU
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Why The Subject Is Important
India
Almost 12 people die due to electrocution every
day .
42 % of total fires occur due to electrical
sources.
8% deaths that occur in factories are due toelectricity
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SAFETY OF PUBLIC
Road Crossing
Tree Touching
Ground Clearance
Building Clearance
Consumer Installations
Unauthorized Connections.
Easy Access Of Public To Utilitys Installations.
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Stealing Directly From Transformer
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SAFETY OF EMPLOYEES
At The Time Of Construction
At The Time Of Operation
At The Time Of Attending Breakdown
At The Time Of Routine Maintenance
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SAFETY OF LINES AND EQUIPMENTS
Relays And Protection Devices
Setting Of Relays
Hot Spot Detection
Line Diagrams: Reliability And Smart Updation
Oil Testing
Logging Operational Parameters
Annunciation System Checking
Earthing
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Why Accidents happen?
Accidents generally happen due to lack of
maintenance, lack of Supervision, lack of knowledge,
over confidence and negligence. Accidents may also
happen due to one or more of the following reasons:
Using improper tools
Improper/non usage of protective devices
Lack of proper instructions and supervision
Mental/physical condition of the employee Poor Judgment
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Continued-
Unsafe condition: The conditions with potential ofcausing injury to a person or damage to equipmentare called Unsafe Conditions.
Examples
Unguarded machines. Defective machine.
Unsafe design/construction.
Improper illumination.
Poor house-keeping. Lack of proper tools.
Slippery floor.
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Indirect Causes Of Electrical
Accidents
a) Lack of
knowledge and
skill:-
Incorrect
knowledge
Incomplete
knowledge.
Unskilled/lowdegree of skill.
Misunderstanding
job instructions.
b) Improper
Physiological/Anatomica
l characteristics.
This relates topersons of:-
Poor eye-sight.
Hard of hearing.
Over-age.
IllnessAllergic.
Intoxication
Improper Psychological
Characteristics.
c) Persons who
are:
Arrogant.
Lazy.
Fearful.
Nervous.
Egoistical.
Absent-minded.
Over-confident.
(Contributing causes which give rise to direct causes)
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Cost of Accidents
Direct Cost-
Cost of medical treatment, Compensation for loss of earning capacity/ permanent
disability/fatality
Indirect Cost-
Production loss, Transportation charges, Time loss by co-workers, Idle time ofmachine.
Damage to equipment, Loss of morale of workers in unit, Loss of time supervisory
personnel in submitting report/accident analysis, Loss of efficiency of injured persons
after reporting for duty, Administrative expenses, Legal/Court expenditure,
Company/s reputation at stake.
Cost of training the substitute employee, Investigation by statuary authorities,Business interruption/failure to meet schedule, Penalties imposed by statuary
authorities
All injury cases, weather minor or major, result in financial loss to the organization. In
addition to irreparable loss for the family members in case of fatal accident.
Total Cost of Accidents = Direct Cost + Indirect Cost
Indirect Cost usually varies from 5 to 11 times that of direct cost
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Safety Awareness In Use Of Electricity
Electrical energy is the most commonly used form ofenergy.
One cannot imagine the life without electricity in modernsociety.
Using electricity is very simple, but, little does one know
about how electricity really works. Such a situation is not good because electricity is a good
servant but a very bad master.
It can cause instantaneous death, life long disability due
to severe burns or devastating fires turning crores ofrupees worth assets to ashes.
It is, therefore, absolutely essential that one should knowwhat precautions to take while using electricity.
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SAFETY EDUCATION & AWARENESS
Analysis Of Electrical Accidents
Sharing The Case Study Report Of Each Accident Among TheWorlmen Regularly.
Documentation Of Each Accident
Building Up Of Knowledge Bank On Electrical Accidents.
Regular Training To Field Staff
Awarding Employees For Exhibiting Safety Sense And Norms In WorkPlace.
Conducting Quizes On Safe Practices Among Discom Employees.
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Continued-
Unauthorized persons shall not attempt replacement oftransformer fuses
Other than utility employees shall not try to replace streetlights or set right service wires
Inform nearest utility office if loose or hanging wires arenoticed
While drilling bore wells ensure that the casing pipes donot touch live wires while they are being lifted up.
Do not go near the Distribution transformers
Do not touch low lying or snapped conductor Do not lean against electric poles
Do not stand beneath overhead lines while heavy windsare blowing
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Electrical Safety Work Practices
Some of the important electrical safety work practices are given below:
Ensure that operating procedures are up to date and appropriate for conditions.
Evaluate circuit information drawings.
Determine degree and extent of risks involved.
Comply with minimum clearances when working around electrical power lines orother exposed conductors.
Always wear safety glasses and a hard hat when working on live circuits.
Use electrically insulated tools.
Use electrically insulated gloves.
Test dates for integrity of equipment and protective clothing - independent safetylab.
Wear required personal protective clothing (i.e., long sleeve shirt and long pants)-flame resistant materials for clothing (different weights for protection dependent on
fault levels and clearing times)
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Your hands are your most valuable tools. Protect them by wearing appropriate safety gloves.Before using, inspect the gloves for signs of wear and tear and other damage.
Evaluate personnel qualifications.
Use ladders with nonconductive side rails if there is any possibility the ladder could contactexposed energized parts.
Follow lock-out tag-out procedures.
Inspect all extension chords for wear and tear.
Never drape electrical chords over heat sources.
Never store flammable liquids near electrical equipment, even temporarily.
Be aware of special training requirements.
Motors with thermal protection can restart without warning, always lockout the motor beforeworking on it.
Only qualified personnel should perform maintenance, inspection and repairs on any electricalequipment.
Electrical Safety Work Practices
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SAFETY ITEMS FOR
EMPLOYEES
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CESUS INITIATIVE ON SAFETY
CESU is insisting for AB cable for LT extension
Insisting Linemen to use Helmet, Safety Shoes andGloves while on work.
High voltage detectors have been provided to fieldmaintenance teams.
Over loaded transformers are upgraded or additionaltransformers are installed promptly in order to ensuresafety of equipments.
All the Divisional Engineers are instructed to visit the33/11 kv sub stations at least once in a week to ensure
safe operation and maintenance of the sub stations. House keeping competition has been initiated among the
Divisional Engineers to ensure quality and safe operationof Sub stations.
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