The Orissa Electricity Regulatory Commission by mikeholy

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									     SOUTHCO
   PRESENTATION
ON SAFETY MEASURES
=================
  BEFORE HON’BLE
        OERC
   DATE 02ND MAY’ 2009
                         1
2
      A. GIST OF PREVENTIVE ACTION TAKEN BY SOUTHCO

1.   SOUTHCO IS MAKING DUAL EFFORTS FOR PREVENTING ACCIDENTS
     & IMPROVING SAFETY OF THE WORKMEN AS WELL AS PUBLIC
2.   BESIDES PROVIDING SAFETY EQUIPMENTS, ON SIGHT TRAINING IS
     ALSO BEING PROVIDED TO THE WORKMEN
3.   TE TRAINING PROGRAM NOT ONLY COVERS TRAINING MANUAL BUT
     ASLO THE SET OF QUESTIONARIES, DO‟S & DONT‟S
4.   THE TOPICS COVERED IN THE TRAININGS ARE AS FOLLOWS
       - Fundamentals of Electrical Hazards
       - Safe Practices in Power Distribution
       - Safety measures & First Aid
       - Accidents and Reporting
       - Minimum Statutory Electrical Clearance
       - Myths & Misconceptions
       - Electrical Safety
       - Summary of Hazards and Protections

                                                           3
      Fundamentals of Electrical Hazards
 More than 3 ma
    painful shock
 More than 10 ma
    muscle contraction “no-let-go” danger
 More than 30 ma
    lung paralysis- usually temporary
 More than 50 ma
    possible ventricular fib. (heart dysfunction, usually fatal)
 100 ma to 4 amps
    certain ventricular fibrillation, fatal
   Over 4 amps
    heart paralysis; severe burns. Usually caused by >600 volts
                                                                   4
        SAFE PRACTICES IN POWER DISTRIBUTION
                              INTRODUCTION
A considerable number of electrical installations is coming up every year by
way of village electrification (MNP, RGGY, PMGY, Biju Gramina yojna) and
pump set energisation under different REC schemes as well as deposit
works
The number of Electrical accident is increasing day by day due to
• Non observance of safety provisions under I.E. rules and
• Carelessness and negligence in Maintenance work
• Non observation of traffic rules by general public
• Non-ordination of different Govt departments in execution of Projects
• It has been noticed that our employees although aware of the risks and
safety precautions to be taken; do not observe them due to over confidence
and familiarity with the lines and equipments                SOUTHCO
              SAFETY MEASURES AND FIRST AID


• The General safety precautions to be adopted for different electrical
installations has been envisaged in chapter IV of the I.E rules 1956
• In addition, some more safety precautions have also been provided under
rule 61, 67, 90 and 91 of the I.E rules
• The Central Electricity Board (Ministry of Irrigation & Power, New Delhi)
has published a “Model code” for safe operation and Maintenance of
Transmission and Distribution systems
• The REC, New Delhi has also brought out a safety manual” REC
MANUAL/ 1974 covers the safety procedures and precautions to be
observed by the employees of the electricity undertakings in the prevention
of accidents


                                                             SOUTHCO
                      ACCIDENTS & REPORTING

                  MAIN CAUSE LEAD TO AN ACCIDENT
• Bypasses fuses, MCB (Miniature Circuit Breaker), etc
• Use of re-wirable fuses
• Earthing defects and Accessible live parts
• Electrical rubber mat
• Wrong identification of equipment/ Feeders
• Defective electrical portable tools
• Interlocks provided for multiple power sources
• Is the interlocking system in place
• Operational clearance as per IER 56
• Tripping hazards due to loose cabling / Cords, etc
• Adequacy of illumination in electrical rooms/ around panels, DBs etc

                                                                SOUTHCO
                                        7
                         ACCIDENTS & REPORTING

                         ELECTRICAL FIRE HAZARDS
• Storage of combustible materials near electrical equipment/ Fuse units
• Proper cable joint procedures as per manufacturer
• Earthing defects
• Use of non standard fuse wires
• By passing of protection devices
• Deteriorated insulation
• Sealing of cable passes, openings, baffle walls (Inactive fire protection)
• Unused openings in live panels, etc
• Possibility of ground fault / Short circuit
• Mechanical protection to cables
• Loose terminations due to improper supports, crimping
• Improper gland installation, wrong lug size
• Over rated fuses wrongly set protection relays etc
                                                                    SOUTHCO
                                          8
                                   MINIMUM STATUTARY ELECTRICAL CLEARANCES
Sl
     CATEGORY OF                                                                  132     220     400
N                                      Unit   LV    MV    11 KV   33 KV   66 KV                           Remark
     CLEARANCES                                                                   KV      KV      KV
o

     Clearance if Overhead
                                                                                                        Rule 77 I.E.
     Electrical Lines across the
                                                                                                        Rule 1956
1    street                             Mtr   5.8   5.8    6.1     6.1     6.4    7.015   7.33    9.5

2    Along the street                   Mtr   5.5   5.5    5.8     5.8     6.4    7.015   7.83    9.5   -do-

3    Else where                         Mtr   4.6   4.6    4.6     5.5    5.805   6.415   7.33    8.9   -do-

     Minimum clearance between
                                                                                                        I.S., 5613
4    Conductor & Tree                   Mtr                2.6     2.8     3.4     4.0     4.6    5.5

     Clearance to Ground at                                                                             Rule 78 of
     crossing with tram Way /                                                                           I.E. Rule
5    Trolley                            Mtr   1.2   1.2   2.44    2.44    3.05    3.85    3.57          1956

                                                                                                        I.S.-5613
     Clearance to Ground at
                                                                                                        (part-S/S- 1)
     crossing with telecom lines
6                                       Mtr                               2.44    2.75    3.05          1985

     Clearance to Ground at railway                                                                     I.S. 5613
     crossing. (Board/Narrow/Meter                                                                      (part-2) sec-
7    gauge) line inside the Station     Mtr               13.25   13.25   13.59   14.20   15.11         2 1985

     Outside the Station                                                                                -do-
8                                       Mtr               11.28   11.28   11.59   12.2    13.11

     Clearance to ground at
     electrified Railway
                                                                                                        -do-
     (Board/Narrow/Meter gauge)
                                                                                                               9
9    line inside the Station            Mtr               15.28   15.28   15.59   16.2    18.66
Sl
     CATEGORY OF                                                                  132    220    400
N                                      Unit   LV    MV    11 KV   33 KV   66 KV                          Remark
     CLEARANCES                                                                   KV     KV     KV
o


     Outside the Station                                                                 15.1          -do-
10                                     Mtr                13.28   13.28   13.59   14.2    1
     Vertical clearance of over-head
                                                                                                       Rule-79 &
     electrical line, from any flat
                                                                                                       80 of I.E.
     roof, open, saicony, verandah
                                                                                                       Rule, 1956
11   rood of any building              Mtr    2.5   2.5    3.7     3.7     4      4.6    5.4    7.04
     Horizontal clearance of over-
     head elect. Line from any flat-                                                                   Rule-79 &
     room, open balcony varandah                                                                       80 of I.E.
     roof and lean to roof of any                                                                      Rule, 1956
12   building.                         Mtr    1.2   1.2    1.2     2.0     2.3    2.9    3.7    5.34
                                                                                                       Rule-64-2
     Ground clearance in out door
                                                                                                       (a) (ii) of
     sub-station
13                                     Mtr                2.75     3.7     4.0    4.6    5.5    8.0    IER' 56
     Sectional clearance in out-door
                                                                                                       -do-
14   sub-station                       Mtr                 2.6     2.8     3.0    3.6    4.3    5.57
                                                                                                       I.S. 5613
     Minimum clearance from live
                                                                                                       (part-2/
     conductor of power line to
                                                                                                       Sec-1)
     earthed metal parts
15                                     Mtr                        0.33    0.915   1.33   2.13          1995
     Clearance of live parts to                                                                        IS-10118
     earthed metal parts of out-door                                                                   (part-III)
16   switch-gears.                     Mtr                0.12    0.32    0.63    0.9    1.3           1957
                                                                                                          10
Sl   CATEGORY OF                                            33     66     132      220    400
                                   Unit   LV   MV   11 KV                                         Remark
No   CLEARANCES                                             KV     KV     KV       KV     KV
                                                                                   2.3    3.4
     Phase to phase clearance of
                                                                           1.35     to     to   IS-5623
     over head line
17                                 Mtr               0.4    0.4    0.75   to 1.6   2.7    5.2
     Phase to phase clearance
                                                                                                -do-
18   inside sub-station            Mtr               0.4    0.4    0.75   1.35     2.3    3.4
     Phase to phase clearance
                                                                                                -do-
19   inside switch-gear            Mtr              0.12    0.32   0.63    1.3     1.5    2.4
                                                                                                IS-5613
     Clearance of Right-of-way
                                                                                                (part-2/sec-
     width
20                                 Mtr               7      15     18      27      35     52    2) 1985
     Mid-span clearnce between
     earth wire and power
                                                                                                -do-
     conductor of transmission
21   line.                         Mtr                      1.5    3.0     6.1     5.5
     Clearance between lines
                                                                                                -do-
22   when crossing each other      Mtr              2.44    2.44   2.44   3.05     4.58




                                                                                                       11
      Myths and Misconceptions

Electricity takes the path of least resistance.

      Electricity wants to go to ground.

 If an electric tools falls into a sink or tub of
         water, the item will short out.
   Myths and Misconceptions

    AC reverse polarity is not hazardous.
It takes high voltage to kill; 120 volts is not
                 dangerous.
  Double insulated power tools are doubly
   safe and can be used in wet and damp
                  locations.
         ELECTRICAL SAFETY
1.    Advice from Virginia Power
       A. If you are in a vehicle and Power Lines fall on
vehicle -
          stay inside (If you are driving continue to
drive away
          from line.)
       B.     If you are outside the vehicle - Stay Away.
       C.     It‟s wise to be overly cautious.
2.      It is not unusual in a disaster for more people to
be killed by carelessness in the aftermath than were
killed by the event itself.
3.    Watch for submerged transformers.
        ELECTRICAL SAFETY

4.     If you discover downed power lines - Note
Location
       (i.e. Street, Address & Approx. Distance to
nearest Cross Street.)
5.   If possible, obtain Pole Number or the Pole
Number closest to downed wires.
6.   Do not drive through standing water if there are
downed lines in the water.
Summary – Hazards & Protections
Hazards                           Protective Measures
• Inadequate wiring               • Proper grounding
• Exposed electrical parts
• Wires with bad insulation       • Use GFCI‟s
• Ungrounded electrical systems   • Use fuses and circuit
  and tools                         breakers
• Overloaded circuits             • Guard live parts
• Damaged power tools and         • Lockout/ Tagout
  equipment
• Using the wrong PPE and tools   • Proper use of flexible
• Overhead power lines              cords
• All hazards are made worse in   • Close electric panels
  wet conditions                  • Training
•   One training center of SOUTHCO is located at Ambagada Grid S/S
    colony where the new entrants in the level of junior manager / Asst
    Manager / Junior Accountants are being given training by the senior
    level officers regarding regulation, Act, Safety measures , financial
    training and consumer services etc.
•   On Site training programme was conducted at Circle/ Division and
    sub-division level for employees to know the safety measures and
    accident prevention procedure while working in live line. The details
    of trainings provided during the FY 2008-09 is as follows.
•   ALL THE SUB-DIVISIONS WILL BE AGAIN COVERED IN THE
    CURRENT FY 2009-10
Sl No   Date         Name of the Circle/ Div/ Sub-Divn.
1       6.1.2008     Jeypore Circle
2       7.1.2008     Rayagada Circle
3       4.2.2008     Bhanjanagar Circle
4       8.4.2008     Chatrapur Sub-Division
5       9.4.2008     Rambha Sub-Division
6       10.4.2008    Khallikote Sub-Division
7       11.4.2008    Hinjilicut Sub-Division
8       14.4.2008    Aska Sub-Division
9       15.4.2008    Kabisurya Nagar Sub-Division
10      16.4.2008    Polosara Sub-Division
11      17.4.2008    Digapahandi Sub-Division
12      18.4.2008    Chikiti Sub- Division
13      9.5.2008     Paralakhemundi Sub-Division
14      23.5.2008    Purusottampur Sub-Division
15      9.8.2008     Berhampur Electrical Division No-I
16      11.8.2008    Berhampur Electrical Division No- II
17      15.12.2008   Rayagada, Paralakhemundi and Gunupur Sub-Divisions

                                                                          18
On dated 10.9.2008 in the officer chamber of Conservator of
Forest, Berhampur Circle, Berhampur, a co-ordination meeting
was held to conduct a joint verification of transmission lines
(under Gajapati, Ganjam, Phullabani & Boudh) to rectify the
deficiency therein to avoid accident to animals Hence 19 forest
ranges were jointly surveyed and the deficiency observed
under 7 nos forest ranges have already been rectified

Such as shifting of lines , erecting of intermediate poles and
providing „T‟ clumps to maintained correct ground clearance
The rectification works under 4 forest ranges are under
progress. The deficiencies in the balance 8 forest ranges will
be complied immediately on receipt of the estimate which are
under progres
                                                           19
              B. PREVENTIVE STEPS TAKEN BY SOUTHCO
  AS PER LETTER OF CEI (T&D) 1924 DATED 16.07.08 AND 769 DATED 31.03.09
             READ WITH OERC LETTER NO. 885 DATED 24.04.09
                                               MAINTENANCE 2008- ACTION PLAN 2009-10
               ITEM               DETAILS
                                                      09             BY JULY' 10

Maintenance of Lines

33 KV LINES                     2741.77 KMS        2583 KMS              FULL
11 KV LINES                     14337.62 KMS      10210 KMS              FULL
LT LINES                        10241.60 KMS       4300 KMS            8000 KMS
Replacement of damanged Stays    Procured       Utilised 2008-09    Planed 2009-10
Insulators                          200               50                ALL THE
HT Stay                            1600               350           DAMAGED STAY
                                                                   SETS WHICH WILL
LT Stay                             781               250
                                                                     BE REPLACED
Stay Wire                        10080 KG          3000 KG

Repair of Tilted Poles            2377 Nos          800 Nos         ALL TILTED POLES

Replacement of Cross Arms         800 Nos           300 Nos
                                                   HT 50 KMs/
Restringing of Conductors                          LT 90 KMS

                                                                                20
                 PREVENTIVE STEPS TAKEN BY SOUTHCO
  AS PER LETTER OF CEI (T&D) 1924 DATED 16.07.08 AND 769 DATED 31.03.09
             READ WITH OERC LETTER NO. 885 DATED 24.04.09
                                                         MAINTENANCE 2008- ACTION PLAN 2009-10
                ITEM                      EXISTING
                                                                09             BY JULY' 10

Maintenance of Sub-stations

33/11 KV                                    123                 123                  FULL
11/0.4 KV                                  11583                4300                  8000


Replacement of Damanged Stays                                    50
Repair/ Replacement of AB Switchs          80 Nos               30/5
Checking/Replacement of Jumpers                           All 33/11 KV SS              All
                                      We have procured
                                       18 nos 33KV and       7 Nos New/25 Nos
                                        55 Nos of 11KV          Old Breakers
                                        VCBs during FY      Repaired & brought     25 Nos New &
Operation of Breakers at 33/11 KV SS 2007-08 and 2008-           into servcie       80 Nos old
                                     Inturruption Report, Line Clearance, Transformers & Breakers
Upkeeping of Registers at 33KV SS    Records Maintained
Periodical Inspction of Lines & SS   Twice in a year once before Moonsoon & during Winter Season
                                                                                             21
•THE MEASURES TAKEN BY SOUTHCO INCLUDES INSTALLTAION OF GOOD
 NUMBER OF 33 AND 11 KV VCBs, REPLACEMENT OF AB SWITCH, HG
 FUSES, RENOVATING EARTHINGS IN THE PRIMARY SS FOR SAFE
OPERATION
• LINE MAINTENANCE, TRIMMING OF TREES, ETC
• T-CLAMP, F-CLAMP, PG CLAMP ARE REPLACED INCLUDING NEW
 JUMPERING AND REPLACEMENT OF HIGHER SIZE BUS-CONDUCTOR IN
 ALL 33/11 KV SS
• TILTED POLES AND CROSS ARMS OF ALL THE LINES AND SS AFTER
 INSPECTION ARE PLANNED TO BE RECTIFIED BY 2009-10
• COMOUND WALLS /BARBED WIRE FENCING ARE COMPLETED FOR 32
 (100) NOS OF SS AND PLANNED FURTHER TO PROVIDE IN ALL THE SUB-
 STATIONS. BARBED WIRE FENCING IS PROVIDED TO 55 (100) NOS OF SS
• WE HAVE PROCURED EARTHING DEVICE 1904 NOS, EARTHING COIL 1665
 KVS & GI FLAT 8039 KGS AND STARTED RENOVATING EARTHINGS IN THE
 EXISTING DISTRIBUTION & PRIMARY SS INCLUDING HT LINE EARTHING.
 TOTAL RENOVATION COMPLETED SO FAR IS 329 NOS
• SOUTHCO HAS PURCHASED 2400 NOS LA & REPLACING ALL THE
                                                       OF
 DEFECTIVE ONE TO AVOID SNAPING OF CONDUCTOR & FAILURE 22
 TRANSFORMERS
• SOUTHCO HAS PURCHASED 9000 NOS KIT-KAT FUSES FROM 63 AMPS TO
 400 AMPS AND PUTTING IN DTS FOR SAFETY
• SOUTHCO HAS PURCHASED FUSE WIRES FROM 2.5 AMPS TO 200 AMPS A
 TOTAL OF 5000 KG
• DISTRIBUTION BOXES OF DIFFERENT CAPACITIES ARE INSTALLED ALONG
 WITH THE NEW SS PROPOSED UNDER SI SCHEME
• 156 NOS OF HELMETS AND 932 NOS OF SAFETY HAND GLOVES HAVE
 BEEN PROVIDED TO LINE STAFF
• WE ARE PROCURING 200 NOS OF FIRST-AID BOX SHORTLY AND THE
 TENDER PROCESS COMPLETED
•OUR OFFICERS FROM CORPORATE OFFICE ARE VISITING TO FIELD FOR
 MONITERING THE QUALITY OF THE CONSTRUCTION AND MAINTENANCE
• 108 NOS OF DISCHARAGE RODS AND 237 NOS OF EARTHING DEVICES
 HAVE BEEN PROVIDED TO FIELD UNITS FOR SAFETY



                                                             23
THANK YOU

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