condition monitoring based maintenance management

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CONDITION MONITORING MONITORING BASED MAINTENANCE MANAGEMENT MANAGEMENT JAGRUT PATEL 27 12 11 27-12-11

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Page 1: Condition Monitoring Based Maintenance Management

CONDITIONMONITORINGMONITORING

BASED MAINTENANCE MANAGEMENTMANAGEMENT

JAGRUT PATEL27 12 1127-12-11

Page 2: Condition Monitoring Based Maintenance Management

[A] BREAKDOWN MAINTENANCE MANAGEMENT

METHODS OF MAINTENANCE MANAGEMENT• METHODS [A] BREAKDOWN MAINTENANCE MANAGEMENT

When:

METHODS

• CONDITION MONITORING

EARTHING Simple “When Machine Fails, Fix It” Most Expensive

• EARTHING

• MV & LV CONDUCTORS

Why Not: High value of spare parts inventory High overtime labour costs

• MV AND LV PANEL BOARDS

High overtime labour costs High machine downtime Loss of profit due to unscheduled partial or total

stoppage of productionstoppage of production.

Case: Example ? Everywhere Example…? Everywhere

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 3: Condition Monitoring Based Maintenance Management

[B] PREVENTIVE MAINTENANCE MANAGEMENT

METHODS OF MAINTENANCE MANAGEMENT• METHODS [B] PREVENTIVE MAINTENANCE MANAGEMENT

When:

METHODS

• CONDITION MONITORING

EARTHING Based on Elapsed Time or Hours of Operation Assumption : Machine Performance is Function of Time Outcome : Unnecessary Maintenance

• EARTHING

• MV & LV CONDUCTORS

Outcome : Unnecessary Maintenance

Why Not: Maintenance jobs same for type of equipment

• MV AND LV PANEL BOARDS

Maintenance jobs same for type of equipmentirrespective of duty

Undue Costing No guarantee for failure of equipment in near future No guarantee for failure of equipment in near future

after maintenance Loss of production due to scheduled shutdown

Example: Motor Bearing Replacement

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 4: Condition Monitoring Based Maintenance Management

[C] PREDICTIVE MAINTENANCE MANAGEMENT

METHODS OF MAINTENANCE MANAGEMENT• METHODS [C] PREDICTIVE MAINTENANCE MANAGEMENT

When: Condition Driven Maintenance

METHODS

• CONDITION MONITORING

EARTHING Conditions monitored

• Actual physical condition• Operating parameters like efficiency

• EARTHING

• MV & LV CONDUCTORS

Operating parameters like efficiency• Test results, whenever conducted

Why Not: Inadequacy of electrical parameters observed to meet

• MV AND LV PANEL BOARDS

Inadequacy of electrical parameters observed to meetdata requirements for proper and correct diagnosis ofproblem – no co-relation with process parameters

Condition monitoring of some portion or component ofCo d t o o to g o so e po t o o co po e t oequipment – entire system as a whole not monitored,hence true root-cause of problem not identified.

Revenue Loss due to system down time andi ffmaintenance efforts

Case: Maintenance of transmission line Insulator Discs

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Gasket Replacements

Page 5: Condition Monitoring Based Maintenance Management

[D] CONDITION MONITORING BASED MAINTENANCE

INTRODUCTION• METHODS [D] CONDITION MONITORING BASED MAINTENANCE

MANAGEMENTWhen:

METHODS

• CONDITION MONITORING

EARTHING Dealing with entire system as entity – holistic approach Concept of ignoring and extending maintenance period.

• EARTHING

• MV & LV CONDUCTORS

Why: Possible to implement in relatively inexpensive “step-

by-step’ approach after giving due consideration to

• MV AND LV PANEL BOARDS

relevant factors Implementation to be approached in different way in

working industry and new industryf Easy to implement in new industry as part of project

Disadvantages of other maintenance programs.10800 10700

11000

Case: Insulation Trend Monitoring

7500

10500

100009700

7000

8000

9000

10000

MEG

OH

MS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

5500

5000

6000

Jan-06 Jul-06 Jan-07 Jul-07 Jan-08 Jul-08 Jan-09

MONTH & YEAR

Page 6: Condition Monitoring Based Maintenance Management

FACTORS AFFECTING CM IMPLEMENTATION• METHODSMETHODS

• CONDITION MONITORING

EARTHINGCOST

OF NEW COST

OF

CRITICALITY OF • EARTHING

• MV & LV CONDUCTORS

OF NEW EQUIPMENT V/S CM

COST

OF EQUIPMENT DOWNTIME

OF EQUIPMENT FOR

SUSTAINING PRODUCTION

• MV AND LV PANEL BOARDS

FACTORS FOR CONSIDERATION OF CONDITION

MONITORING BASED MONITORING BASED MAINTENANCE MANAGEMENT

EQUIPMENT DUTY CYCLE

AVAILABILITY OF STANDBY

REDUNDANCY

PRODUCTION LOSS DUE TO OUTAGE

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 7: Condition Monitoring Based Maintenance Management

FACTORS AFFECTING CM IMPLEMENTATION• METHODS WEIGHTAGES RANGE [1 TO 10]METHODS

• CONDITION MONITORING

EARTHING% OF COST

EQUIPMENT V/S CM EQUIPMENT

DOWNTIME COST

CRITICAL -10/10 IMPORTANT – 8/10

WEIGHTAGES : RANGE [1 TO 10]

• EARTHING

• MV & LV CONDUCTORS

EQUIPMENT V/S CM COST – 10% -

WEIGHTAGE- 10/10

DOWNTIME COST ONCE IN YEAR – 1/10

ONCE IN MONTH – 5/10

IMPORTANT 8/10 NOT IMPORTANT –

5/10

• MV AND LV PANEL BOARDS

FACTORS FOR CONSIDERATION OF CONDITION

MONITORING BASED MONITORING BASED MAINTENANCE MANAGEMENT

DUTY CYCLE CONTINUOUS – 10/10

STAND BY – 5/10

STAND BY AVAILABLE – 5/10

NOT AVAILABLE – 10/10

HEAVY LOSS – 10/10 NO LOSS – 0/10

Case: BFP of Power Plant

M t f P i St ti

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Motor of Pumping Station

Page 8: Condition Monitoring Based Maintenance Management

HURDLES IN CM IMPLEMENTATION IN WORKING

HURDLES• METHODS HURDLES IN CM IMPLEMENTATION IN WORKING

INDUSTRIES:METHODS

• CONDITION MONITORING

EARTHING Financial approval for capital investment. No technical feasibility to carry out modification in

installed equipment.

• EARTHING

• MV & LV CONDUCTORS

No stoppage of production stream, if required, formarginal time duration to install devices required for theproposed condition monitoring

Resistance of the shop floor people for introduction of

• MV AND LV PANEL BOARDS

Resistance of the shop-floor people for introduction ofnew system presuming consequent increase in theirwork load.

Availability of good data and knowledge of problems in Availability of good data and knowledge of problems inequipments and their nature, equipment failures, etc.And hence finding no need to introduce concept of CM.

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 9: Condition Monitoring Based Maintenance Management

[A] ON LINE

TYPES• METHODS [A] ON-LINE

Transformer Parameters – Current, Voltage, PowerFactor, KW, KVA, Oil/Winding Temp, Oil Level, TapPosition Etc

METHODS

• CONDITION MONITORING

EARTHING Position, Etc. Generator Parameters – Current, Voltage, Power

Factor, KW, KVA, Winding Temp, Coolant Temp,Speed Vibrations Bearing Lube-oil Pressure/Temp

• EARTHING

• MV & LV CONDUCTORS

Speed, Vibrations, Bearing Lube oil Pressure/Temp,Etc.

High Rated HT/LT Motors - Current, Voltage, PowerFactor, KW, Winding Temp, Speed, Vibrations,

• MV AND LV PANEL BOARDS

, , g p, p , ,Bearing Lube-oil Pressure/Temp, Etc.

[B] OFF-LINE Insulation Resistance Measurement Of Windingsg BDV of Transformer Oil TAN Δ / Power Factor / Capacitance Measurement Partial Discharge Testing Of HT Cables Partial Discharge Testing Of HT Cables DC Resistance Measurement Of Windings Testing Of Protective Relays Testing And Calibration Of Instruments And

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Testing And Calibration Of Instruments AndIndicating/Recording Meters

Page 10: Condition Monitoring Based Maintenance Management

[A] PRELIMINARY PHASE

IMPLEMENTATION• METHODS [A] PRELIMINARY PHASE

Preparing database – equipment data, past importantoperating data, maintenance data, testing data, etc.E i t t d f il d t b t d

METHODS

• CONDITION MONITORING

EARTHING Equipment outage and failure database – past recordsfor cause of failure, action taken to set right breakdown,duration of outage with dates, spare parts used, costincurred etc

• EARTHING

• MV & LV CONDUCTORS

incurred, etc. Preparing preliminary CM implementation plan and

estimated budget requirement – modifications in plananticipated during actual execution along with

• MV AND LV PANEL BOARDS

p g gconsequent revision in budgeted cost

[B] PRACTICAL PHASE Preparing detailed evaluation criteria & testing to bep g g

carried out along with interval for equipment and/orsystem.

Finalization of maintenance procedures and troubleh ti th d b d O&M lshooting methods based on O&M manual, own

experience, advice from technical expert. Finalization of report formats

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 11: Condition Monitoring Based Maintenance Management

[A] O i ti lt h bi t h ll

OPTIMIZING• METHODS [A] Organization culture change – biggest challenge.

CM Considered as breakdown prevention tool Little or no knowledge of importance of maintenance

METHODS

• CONDITION MONITORING

EARTHING Only maintenance Group responsible for breakdowns,unscheduled delays

[B] CM program to be used as plant or processoptimization tool to detect isolate and solve deviations

• EARTHING

• MV & LV CONDUCTORS

optimization tool to detect, isolate and solve deviationsfrom desired level of performance

Formation of special task group by selectingknowledgeable engineers from different departments to

• MV AND LV PANEL BOARDS

knowledgeable engineers from different departments toimplement CM

Group to be authorized to cross functional boundariesto implement changes under CM wherever requiredto p e e t c a ges u de C e e e equ ed

special task group to be imparted further training forspecific aspects

[C] Proper use of predictive techniques[ ] p p q Not only equipment alone, but system as a whole to be

evaluated, process parameters to be noted andanalyzed and arrive at conclusion

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

System, instrumental for generating revenue, to befocused primarily along with individual component

Page 12: Condition Monitoring Based Maintenance Management

M j f b kd f l t i l i t l k f

MYTHS• METHODS Major cause of breakdown of electrical equipment - lack of

maintenance or inadequate or improper maintenance - nottrue – other causes of premature failure Incorrect design of equipment/system

METHODS

• CONDITION MONITORING

EARTHING Incorrect design of equipment/system Incomplete purchase technical specification Use of sub-standard spare parts Inappropriate operating conditions

• EARTHING

• MV & LV CONDUCTORS

Inappropriate operating conditionsMAINTENANCE IS A NECESSARY EVIL Any work carried out without proper understanding can

be found only evil

• MV AND LV PANEL BOARDS

be found only evilNothing can be done to reduce the maintenance costs oroptimization is impossible At the end of discussions held so far like process At the end of discussions held so far, like process,

maintenance activity and cost can be optimizedMAINTENANCE IS THANKLESS JOB True production people always appreciated for good True – production people always appreciated for good

results, but role of maintenance group hardlyrecognized

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 13: Condition Monitoring Based Maintenance Management

CONDITIONEARTHING SYSTEMS

• METHODS CONDITION MONITORING

METHODS

• CONDITION MONITORING

EARTHING MONITORING• EARTHING

• MV & LV CONDUCTORS

• MV AND LV PANEL BOARDS

EARTHINGEARTHINGSYSTEMSSYSTEMS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 14: Condition Monitoring Based Maintenance Management

IS 3043 1987 CL 2 7

EARTHING SYSTEM DEFINATION• METHODS IS:3043-1987 CL.2.7

[ CODE OF PRACTICE FOR EARTHING] Earthing or earth - the conductive mass of the earth

hose electrical potential at an point is con enientl

METHODS

• CONDITION MONITORING

EARTHING whose electrical potential at any point is convenientlytaken as zero.

IEEE:142 2007

• EARTHING

• MV & LV CONDUCTORS

IEEE:142-2007[ GROUNDING OF INDUSTRIAL AND COMMERCIAL

POEWR SYSTEMS – IEEE GREEN BOOK] A conducting connection whether intentional or

• MV AND LV PANEL BOARDS

A conducting connection, whether intentional oraccidental, by which electric circuit or equipment isconnected to the earth or some conducting body ofrelatively large extent that serves in place of the earth.e at e y a ge e te t t at se es p ace o t e ea t

OTHER STANDARDS IEEE-80-2000 - [IEEE GUIDE FOR SAFETY IN AC IEEE-80-2000 - [IEEE GUIDE FOR SAFETY IN AC

SUBSTATION GROUNDING] EARTHING PRACTICE – CDA PUBLICATION 119-

1997

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 15: Condition Monitoring Based Maintenance Management

‘GROUNDING’ ti f t i

EARTHING & GROUNDING• METHODS ‘GROUNDING’ means connection of current carrying

parts to ground, like transformer or generator neutral ‘EARTHING’ means connection of non-current carrying

parts to ground like metallic enclosures parts to

METHODS

• CONDITION MONITORING

EARTHING parts to ground, like metallic enclosures parts toground, like metallic enclosures

ACTUAL AS PER STANDARDS

• EARTHING

• MV & LV CONDUCTORS

ACTUAL AS PER STANDARDS To quote from IS:3043, CL.0.7 the terms ‘Earthing” and

‘Grounding’ are synonymous. To quote from IEC:60050 The terms ‘Earth’ as well as

• MV AND LV PANEL BOARDS

To quote from IEC:60050 The terms Earth as well as‘Ground’ have both been in general use to describe thecommon power/signal reference point interchangeablyaround the world in the Electro-technical terminology.

To quote from “Earthing Practice” – CDA Publication119 – 1997 (vide BS 7430:1991 Code of Practice forEarthing) It is worth noting that in Europe tend to usethe term earthing whilst in North America the termthe term earthing, whilst in North America, the term“grounding” is more common.

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 16: Condition Monitoring Based Maintenance Management

AS PER IE RULES 1956

STATUTORY REQUIREMENTS• METHODS AS PER IE RULES:1956

All medium voltage equipment to be earthed by twoseparate and distinct connections with earth.

Ne tral points of high and e tra high oltage s stems to

METHODS

• CONDITION MONITORING

EARTHING Neutral points of high and extra high voltage systems tobe earthed by not less than two separate and distinctconnections with earth at generating stations andsubstations, each having its own earth electrode, to be

• EARTHING

• MV & LV CONDUCTORS

substations, each having its own earth electrode, to beearthed at any other point, if required, ensuring nointerference caused by such multiple earthconnections.

• MV AND LV PANEL BOARDS

In case of direct earthing proving harmful rather thanproviding safety, as in case of high frequency corelessfurnaces, relief to be obtained.

Earthing to be provided at substations generating Earthing to be provided at substations, generatingstations and consumer premises as per IS:3043.

To provide facility (test link) for testing of individualearth electrode and all earth connections to be visibleearth electrode and all earth connections to be visiblefor inspection as far as possible.

To calculate prospective fault current for any addition ofplant load, electrical equipment, etc. Vis-à-vis

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

p , q p ,comparing with capability of exIsting earthing systemand to strengthen, if required, along with systemmodification.

Page 17: Condition Monitoring Based Maintenance Management

FACTORS EFFECTING EARTHING• METHODSMETHODS

• CONDITION MONITORING

EARTHING

MOISTURE CONTENT IN SOIL, AFFECTING

UP TO SOME EXTENT TYPE OF SOIL – BLACK SOIL RESISTIVITY • EARTHING

• MV & LV CONDUCTORS

UP TO SOME EXTENT

SOIL TEMPERATURE AFFECTING IN

COTTON, YELLOW SAND, ROCKS, SALINE

SOIL RESISTIVITY

• MV AND LV PANEL BOARDS

– AFFECTING IN AREA HAVING

FREEZING TEMPERATURES

FACTORS TO BE CONSIDERED FOR DESIGN OF EARTHING

MATERIAL OF RESISTANCE OF EARTH CONSTRUCTION OF EARTH ELECTRODE – AFFECTIN CASE

OF PROTECTIVE CONDUCTOR

ELECTRODE – NEGLECTED DUE TO VERY LOW

RESISTANCE

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 18: Condition Monitoring Based Maintenance Management

METHODS AS PER IEC• METHODSMETHODS

• CONDITION MONITORING

EARTHING

TT IT TNS TNC TNCSEarth fault loop impedance High Highest Low Low Low

After N and PE• EARTHING

• MV & LV CONDUCTORS

RCD Required Yes No Yes NoAfter N and PE separates

Need earth electrode at 

• MV AND LV PANEL BOARDS

site? Yes Yes No No No

Conductor cost Low Low Highest Least Least Cost. Risk of broken 

l hneutral No No No Highest No

Safety Safe Less Safe Safest Least SafeSubject to 

consumer endElectromagnetiElectromagnetic interference Least Least Low High Low

Continuity of 

AdvantagesSafe and reliable

operation, cost Safest Cost Inexpensive.

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 19: Condition Monitoring Based Maintenance Management

AS PER IE RULES 1956

MYTHS AND FACTS• METHODS AS PER IE RULES:1956

Copper Earth Electrodes are better than GI or SteelEarth Electrodes

Plate Earthing is better than Pipe Earthing

METHODS

• CONDITION MONITORING

EARTHING Plate Earthing is better than Pipe Earthing More water, less resistance More salt, less resistance

• EARTHING

• MV & LV CONDUCTORS

Deeper the earth pit and longer the earth pipe/rod,lesser will be the resistance

Maintenance Free Earthing – Install and forget

• MV AND LV PANEL BOARDS

For Conductor Electrodes Resistance as per IS:3043 100 ρ 2l2

R = ------- log ----- Ohms R = ------- loge ----- Ohms 2 π l wt where, ρ = Resistivity of the soil in Ohm-m L = Length of the CONDUCTOR in cm

D th f b i l f th l t d i

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

w = Depth of burial of the electrode in cm t = Width of strip conductor

Page 20: Condition Monitoring Based Maintenance Management

WHY

CONDITION MONITORING• METHODS WHY:

HIGHLY NEGLECTED : in many plants, commercialestablishments, electricity supply utility companies,domestic establishments agriculture

METHODS

• CONDITION MONITORING

EARTHING domestic establishments, agriculture

HOW: Instruments required for condition monitoring

• EARTHING

• MV & LV CONDUCTORS

Instruments required for condition monitoring1. Earth resistance tester2. Resistance measuring instrument

• MV AND LV PANEL BOARDS

Different concepts for designing of earthing for outdoorswitchyard applications and plant areas

Digital techniques(C C )1. Digital type earth leakage (CBCT principle) relays

2. Earth loop impedance measurement through shortcircuit analysis (smart meters)

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 21: Condition Monitoring Based Maintenance Management

EARTH LOOP IMPEDANCE TESTER

CONDITION MONITORING• METHODS EARTH LOOP IMPEDANCE TESTERMETHODS

• CONDITION MONITORING

EARTHING• EARTHING

• MV & LV CONDUCTORS

• MV AND LV PANEL BOARDS

EARTH LEAKAGE RELAY

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 22: Condition Monitoring Based Maintenance Management

MV & LV CONDUCTORS• METHODS CONDITIONMETHODS

• CONDITION MONITORING

EARTHING

CONDITION MONITORING• EARTHING

• MV & LV CONDUCTORS

MONITORING• MV AND LV PANEL BOARDS

MV & LVMV & LV CONDUCTORS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 23: Condition Monitoring Based Maintenance Management

WHY

INTRODUCTION• METHODS WHY:

VITAL PARTS: Feeders, Distributor, Loop cable, Linkcarrying current specially when to cater heavy demand.

In the Form of Ins lated Cable B s d cts B sbar

METHODS

• CONDITION MONITORING

EARTHING In the Form of: Insulated Cable, Bus ducts, BusbarTrunks, Overhead conductors, Indoor & Outdoor PanelBusbar etc.

• EARTHING

• MV & LV CONDUCTORS

To Fight Against: Unbalance Loading Condition Temperature Rise

• MV AND LV PANEL BOARDS

Temperature Rise Harmonics Electro Magnetic Interference

& Moisture & Dust Ambient Temperature Conditions Mechanical Strength Method of Installation Joints

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 24: Condition Monitoring Based Maintenance Management

TEMPERATURE MONITORING

CONDITION MONITORING TECHNIQUES• METHODS TEMPERATURE MONITORING

1. ThermographMETHODS

• CONDITION MONITORING

EARTHING• EARTHING

• MV & LV CONDUCTORS

• MV AND LV PANEL BOARDS

2. Infrared temperature monitor

DISTINCT BENEFITS:1. Maintains Records

L d t R t f 70 80% bl

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

2. Leads to Route-cause of 70~80% problems

Page 25: Condition Monitoring Based Maintenance Management

INSULATION MONITORING

CONDITION MONITORING TECHNIQUES• METHODS INSULATION MONITORING

1. HV TestMETHODS

• CONDITION MONITORING

EARTHING• EARTHING

• MV & LV CONDUCTORS

2. Harmonic Measurement• MV AND LV PANEL BOARDS

3 Differential Protection3. Differential Protection

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 26: Condition Monitoring Based Maintenance Management

ELECTRICAL PARAMETER MONITORING

CONDITION MONITORING TECHNIQUES• METHODS ELECTRICAL PARAMETER MONITORING

THROUGH ENERGY MANAGEMENT SYSTEM(SMART GRID CONCEPT) :

1 By Use of Communicable Breakers

METHODS

• CONDITION MONITORING

EARTHING 1. By Use of Communicable Breakers2. By Use of Communicable releases/relays3. Necessary Control Wiring & DAS devices

• EARTHING

• MV & LV CONDUCTORS

• MV AND LV PANEL BOARDS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 27: Condition Monitoring Based Maintenance Management

MV & LV PANEL BOARDS• METHODS CONDITIONMETHODS

• CONDITION MONITORING

EARTHING

CONDITION MONITORING• EARTHING

• MV & LV CONDUCTORS

MONITORING• MV AND LV PANEL BOARDS

PANEL BOARDSPANEL BOARDS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 28: Condition Monitoring Based Maintenance Management

WHY

INTRODUCTION• METHODS WHY:

VITAL PARTS: Handling Bulk Power, heart of anydistribution network.

METHODS

• CONDITION MONITORING

EARTHING

To Fight Against: Unbalance Loading Condition

• EARTHING

• MV & LV CONDUCTORS

Temperature Rise Harmonics Electro Magnetic Interference

• MV AND LV PANEL BOARDS

Electro Static Problems Moisture & Dust Ambient Temperature Conditionsb e t e pe atu e Co d t o s Connections to switchgears & Component failure

problems Mechanical Breakages (Reptile problems)g ( p p ) Vibrations Control Wiring

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 29: Condition Monitoring Based Maintenance Management

CONDITION MONITORING TECHNIQUES• METHODSMETHODS

• CONDITION MONITORING

EARTHING

TEMPERATURE MONITORING1. Thermograph2 Infrared temperature monitor• EARTHING

• MV & LV CONDUCTORS

2. Infrared temperature monitor

INSULATION MONITORING1 HV Test• MV AND LV

PANEL BOARDS1. HV Test2. Harmonic Measurement

3 CONTROL WIRING MONITORING3. CONTROL WIRING MONITORING

4. VIBRATION MONITORING

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

Page 30: Condition Monitoring Based Maintenance Management

CASE STUDIES• METHODSMETHODS

• CONDITION MONITORING

EARTHING

11 KV HT CABLE FREQUENT FAILURE OF XYZMAKE CABLE AT SUZLON FACTORY BARODA

• EARTHING

• MV & LV CONDUCTORS

- REASON : VOLTAGE SPIKE- CULPRIT : NON-HOMOGENEOUS INSULATION

• MV AND LV PANEL BOARDS FREQUENT TRIPPING OF MAIN LT BREAKER OF

TRANSFORMER

- REASON : OVERLOADING NEUTRAL- CULPRIT : HARMONICS GENERATION BY MOTORDRIVEDRIVE.

UNABLE TO LOAD GENERATOR BEYONG 50% OFRATED CAPACITY AT JCT BARODARATED CAPACITY AT JCT BARODA

- REASON : UNBALANCED LOADINGCULPRIT : FLOATING NEUTRAL CONNECTION TO

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL

- CULPRIT : FLOATING NEUTRAL CONNECTION TOGROUND.

Page 31: Condition Monitoring Based Maintenance Management

• METHODS

COURTSEY:

1 Mr Ashok Parikh – Vadodara

METHODS

• CONDITION MONITORING

EARTHING 1. Mr. Ashok Parikh Vadodara2. Mr. S. Sivakumar – L & T, Conoor.

• EARTHING

• MV & LV CONDUCTORS

• MV AND LV PANEL BOARDS

CONDITION MONITORING BASED MAINTENANCE MANAGEME NT JAGRUT PATEL