CONDITIONMONITORINGMONITORING
BASED MAINTENANCE MANAGEMENTMANAGEMENT
JAGRUT PATEL27 12 1127-12-11
[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
[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
[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
[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
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
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
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
[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
[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
[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
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
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
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
‘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
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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.
• 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
Top Related