Preliminary Preliminary details for Electrical Electrical safety audit
1. 2. 3. 4. 5.
Name of the plant and location Products manufactured Plant capacity Total manpower – own + contractual Total area of the plant and facilities
Overview of the Plant Electrical Power distribution scheme 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
Voltage of received power: No of bays: No and rating of step down transformers: primary distribution voltage in the plant: Type of CBs on primary Type of CBs on secondary: Type of transformer neutral ground Primary distribution thru cables /(UG)/ Trenches/Overhead/cable trays No of load centers Ratings of transformer substations No. and ratings of HT motors Approx no of motors Capacitor bank details Captive generation KVA/ Voltage Transformer rating of cap. Plant Standby DG sets No/rating Emergency DG set No/ rating UPS Nos./ rating
Safety check point 1.0
Compliance with Statutory requirements Is a register of designated persons as per CEA 2010 reg. 3 being maintained Does the plant have Designated Electrical safety officer. as per CEA 2010 reg 5 Is record of annual inspections by the electrical inspector available A single line diagram of power distribution in the plant with all relevant technical parameters including protection features for each feeder and short circuit levels at each bus level Approved plan of the substation Test records of all transformers including
Yes/ no
2.0
3.0
4.0
DGA tests Earth pit layout drawings with their numbers A reporting system for any faults and breakdown in transformers of ratings 20MVA and above Preventive maintenance systems , statutory tests and examination of electrical equipments and records Preventive maintenance schedule being followed Are Critical test parameters of major equipments recorded and compared with past test records and a trend analysis carried out as a part of predictive maintenance . Any sign of overloading of any equipment. Are the ratings of motors, switchgears and cable sizes for all feeders shown in SLDs displayed in PCC/MCC rooms . Are Thermographic surveys of all electrical equipments being carried out Is a Cable schedule giving list of all cable connections with cable sizes, lengths , tag nos, cable tray nos. and code nos of equipments connected available Are SOPs for DG sets, Rectifier transformers, handling of portable tools, inspection of incoming material HT substation maintenance etc, being maintained Regular testing of HT breakers and calibration of protective relays . Are earth pit resistances for all the earth pits being measured annually and records being maintained Electrical safety and personal safeguarding Are all necessary PPEs for electrical works such as rubber gloves, shoes, helmets, safety belts earth discharge rods etc maintained in good Are Gas masks required as per CEA 2010 reg 27(4) being maintained Are Artificial respirators required as per CEA 2010 reg. 28(3) being maintained All Interlocks per CEA 2010 reg. 45(1) All protections as per CEA 2010 reg 45(2) PTW/LOTO Is there documented procedure of the PTW system
5.0
6.0
7.0
8.0
9.0
PTW format-Precautions, type of work ,PPE, No. of copies, signing authority, The responsibility of the electrical isolation is well defined Lock out/Tag out feature available Emergency lighting and illumination Sufficient back up supplies available Illumination surveys/levels carried out Lightning protection Lightning protection as per IS 2309 provided Lightning Arrestors / lightning prot. Grid wiresThe LAs connected to isolated earths. Earthing of LAs as per guidelines Are earth resistances of lightning conductors being periodically checked and maintained at recommended values. Flame proof equipment in Hazardous area/ classification of hazardous areas Hazardous areas classified into zone 0,1 and 2 as per IS5572 Flame proof electrical equipments all hazardous zones as per CEA 2010 reg 37(iv) Static electricity prevention and discharge Equipment prone to static generation identified and with earth connections Provision for earthing of tanker bodies at loading and unloading terminals of hazardous liquids Earthing and bonding of pipes have been done in the pipe lines. Earthed bars for discharge of any static from the body of any person entering the area Statutory requirements in elect. Plant Panel spacings are as per provisions of CEA 2010 reg, 37((iii) As per CEA 2010 reg. danger notices as per IS 2551 Instructions for resuscitation from electric shock as per the provisions of CEA 2010 re g 28 Rubber mats covering the length of all the panels as per CEA 2010 reg 19 IS 15652:2006 The switch yard clean gravel and no vegetation. All earth pits with covers, proper identification nos. and dated test data Fencing and gates earthed. Soak pits have been provided for transformer
9.1
10.0
11.0
12.0 13.0 14.0
with above 9000litre of . Silica gel in transformers was fresh in blue color Two point body earth and two point neutral earths for the transformers have been provided. Fire fighting systems for transformers of 10MVA and above as per CEA regulations 2010 reg44(2)(vii)b Fire extinguishers suitable for electrical systems First aid boxes All electrical panels with two point earth connections. trench covers of non inflammable material All transformer substations with fencing, locked gates, danger notices, gravel etc as per statutory requirements . Silica gel being regularly monitored The access transformer yards free from any obstacles All cable rooms clean, well ventilated and easy access. Smoke detectors Process area Electrical equipments such as motors, control boxes and light fittings proper enclosures suitable for the environment. All motors with two independent body earth connections All cables well laid cable trays. All earth pits easily accessible marked with their identification nos and dated test data. Workshop/stores/Administration buildings All wiring is laid on walls cleanly. All temporary connections are with completely insulated industrial plug sockets design . Accident reporting Electrical Accident/ nears misses are being investigated and reports are maintained by the safety dept. Training and awareness Training and awareness programs Safety manual The safety manual available Emergency management plan available
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