three days training program (oct 5-7) on substation ... at mysore.pdf · three days training...

No 213, 13th Main RBI Layout JP Nagar 7th Phase, Bangalore 560078. Mobile: 91-9880784082,

Email: [email protected], [email protected], www.vkes.org , www.electricalguideline.com

VKES Vidyuth Kanti Engineering Services

Three days training program (Oct 5-7) on

Substation Earthing, Industrial earthing and Neutral earthing

at IEI Mysore, Karnataka India

Training program is helpful for students, Engineers working in Design and projects and Research

scholars interested in earthing subject. At the end of the program participants will have awareness

about earthing and will be able to do some typical earthing calculations used during plant design.




Trainer: Paneendra kumar BL

Training Charges: Rs 3500 (inclusive of taxes)

Training material: Shall be provided

Certificate: Certificate of attendance shall be issued by VKES.

Training Venue: Institution of Engineers Mysore

Food for trainees: Simple Vegetarian Lunch Provided at training venue

Simulation Software: Not used during this training.

Payment terms: 100% in advance. No refund in case of cancellation.

Date of Training: 5,6,7 October 2018

Contact: Paneendra kumar BL, 9880784082, [email protected]

Website: www.electricalguideline.com/Conference.html




Training Contents

Day 1 - Substation Earthing design

09:00AM to 9:30AM Trainer and Participants introduction

09:30AM to 10:30AM

What is earthing Why do we do earthing How to protect a person in a substation against electrical shock What happens during a fault Why fault takes place What happens when the current flows to the ground or earth How earthing of domestic industrial system different from substation

10:30AM to 12:00PM

What happens during a shock What current does a person feel shock and when does a person die What is the current allowed through human body What should be the value of ts What if weight of person is more or less than 50kg What is the value of Resistance for the current through the body What are the paths in which current can flow into human body

12:00PM to 12:30PM Lunch Break

12:30PM to 02:00PM

Permissible touch and step voltage Correction factor for foot resistance Permissible touch and step voltage with Cs Earthing Grid, what needs to be connected to the earthing Grid Sizing of earthing grid, Fault current distribution (Sf) Decrement Factor, Grid Geometry

02:00PM to 03:30PM

Mesh Voltage calculation, Step Voltage calculation GPR- Ground potential rise Transferred potential What Causes GPR, Grid Resistance Sample Calculations Case 1: Fault inside substation-design fault current, duration 1sec Case 2: Fault inside a substation-fault current 20.5kA, duration 100ms Fault current distribution




Day 2 - Industrial Earthing design

09:00AM to 10:30AM

What is the function of earthing, Basic requirement before starting the earthing design, Methodology of earthing design, Objective of earthing design, Fault current calculation results, Material of earthing conductor, Earthing conductor sizing, Current density limitation at electrode, Minimum dimensions of conductors, Corrosion, Source earthing of One Generator in isolation, Source earthing of Many Generator in isolation, Source earthing of One Generator parallel with utility, Source earthing of Many Generator parallel with utility, Source earthing of Many Transformers, Transformer neutral earthing, Earthing of UPS neutral

10:30AM to 12:00PM

Types of earthing based on resistance, Solidly grounded system Unearthed or ungrounded system, Reactance earthed system and resonant earthed system, Resistance earthed system, Types of Resistance earthed system, Different types of LV earthing system (BS 7430), Earth Loop Impedance, Potential gradient around the earth electrode, Earth Resistivity measurement, Resistance of earthing system, Measurement of electrode resistance, What all needs to be earthed, Cable Armour earthing, Cable Tray earthing, Electrical Panel and Distribution boards earthing, Junction Box earthing, Motor and Push button station earthing, Lighting poles and fixtures earthing Tanks, Vessels, Piping earthing, Package equipment earthing Lightning Protection system earthing, Electronic equipment earthing system, Earthing of utility pipes, Earthing of steel reinforced bars of structures and buildings


12:30PM to 02:00PM

Earthing Schematic, Types of Electrodes and their resistances, Resistance of Plate electrode, Resistance of Rod or Pipe electrode, Resistance of Rod electrodes in parallel, Variation of resistance of electrode due to length and diameter of the rod, Resistance of straight Strip, Resistance of Mesh, Resistivity of electrodes encased in Low resistivity materials, Earthing of steel reinforced concrete foundations, Treated earth electrodes, Auxiliary earth grid,

02:00PM to 03:30PM

Typical Earthing Layout of LV MV Substations, Layout Requirement, Spacing between electrodes, Distance between electrode and building wall, Depth of horizontal conductor or connecting conductors, Stray Currents Common mode noise, Typical Calculation of Earth electrode resistance of substation, Resistance of Rod electrodes in parallel (BS 7430), Resistance of straight Strip (BS 7430), Resistance of Mesh (BS 7430), Type of joints, Recommended dimensions of earthing Conductor, Typical Earthing design of Oil and Gas installation, Calculation and steps for typical Oil and gas installation earthing design




Day 3- System Neutral Earthing

09:00AM to 10:30AM

Function of Neutral earthing, Inputs required to carry out design, What causes a fault, Coefficient of grounding and Earth fault factor, Type of grounding, Neutral treatment, Selection of type of earthing, Different types of earthing practise used in different sectors, Low resistance grounding, LRNG current rating and protection, Advantages Low resistance earthing of MV system with VFD, Low resistance grounding with Single generators, LRNG typical calculation, Effect of Third harmonics in paralleled Generators on NGR design

10:30AM to 12:00PM

High resistance grounding, Basics, Sequence network of HRNG system, current limit, History and evolution, Overvoltage and insulation, Charging current contributions, Cause of stray capacitance HRNG for Generators with unit transformer, Fault current circulation after breaker is opened due to field discharge system, Open circuit time constant, NGR/NGT design, Rating of NGT, Specification of NGR and NGT, Basic insulation level, Construction of NGR, Ingress protection, NGR Material, NGR time rating, NGR temperature rise, Temperature coefficient of NGR, Requirement of NGT, Fault current in HRNG, Typical calculation of NGR NGT and Brief specification, Arc hazard eliminated by HRNG, Low Voltage high resistance grounding, Oil mines earthing, HRNG for MV distribution system, NGR failure and its associated problems, Monitoring of NGR with relays, Earth fault Protection for HRNG system, locating fault in HRNG system, Why HRNG used in the beginning with only alarm, Arc energy damage limits


12:30PM to 02:00PM

Deriving neutral artificially in Ungrounded power system, Zigzag transformer, specification, Calculation of fault current for network with zigzag transformer, Protection methods when using zig zag transformer, Resonant grounding, Different terminology for a group of similar technology, Resonant grounding system for Unit connected Generator, Typical calculation of resonant grounding for Unit connected generators, Resonant grounding for distribution system, Typical application SLD in European distribution system, Fault current of 11kV isolated network and network with Peterson coil, construction, Type of arc suppression coil, Regulator for Peterson coil, Detection of faulty feeder in resonant earthed system, Voltage at the point of fault, Converting Isolated network, System modification requirement- ASC, Temperature rise of reactors, Rating of neutral grounding reactors, Advantage of ground fault current limiters vs phase fault current limiters

02:00PM to 03:30PM

Active earthing system or Ground fault neutralisers (GFN),Neutral grounding resistor versus Neutral grounding reactor, Type of generator connection and related earthing system, hybrid system, Different types of Earthing of generator and utility system, LV unearthed system, Grounding DC system, Common grounding resistor for generator earthing, Time rating of neutral grounding equipment, Voltage versus Current, Clearing ground fault in definite time, Earthing tripping philosophy fault duration time rating of neutral equipment, Types of earthing system used in generation transmission distribution, Conversion of earthing system, Effect of earthing system on damage overvoltage relay operation, Allowable touch voltage in 11kV system




Local sightseeing in Mysore

Stay: We can arrange budget hotels with competitive tariff for stay at Mysore for

outstation candidates.

Local Site Seeing: We can arrange local transport operator to provide transport

facility to take the outstation participants who are interested in local site seeing daily

from 3:30PM to 8:30PM

Food: We can arrange simple vegetarian Breakfast and Dinner within the hotel.

Reaching Mysore: Trainees shall make their own arrangements to reach Mysore

Some Places of Interest in Mysore:

Shopping: Mysore is famous for Silk sarees, Sandalwood, Traditional items

Tariff Hotel: Approx. Rs 1000/day actual cost depends on the hotel.

Tariff local sightseeing: Approx. Rs 500/day actual cost depends on tour operator.

Local sightseeing,Hotel is not part of training and is not conducted by VKES.

Chamundi Hills

Mysore Palace

Jaganmohan palace

Mysore Zoo

Somnathpur temple Brindavan gardens

three days training program (oct 5-7) on substation ... at mysore.pdf · three days training...

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