Download - Guide Excelec En
-
A GUIDE TO BEST PRACTICE
PRESERVING &MAINTAININGYOUR ELECTRICAL EQUIPMENT
-
OBJECTIVESOF THE EXCELEC GUIDE
This professional guide is aimed at aiding the maintenance manager of an electrical installation, as well as the buyers of these services, to optimise maintenance in terms of both costs and quality.
It provides a tool for optimal implementation of maintenance services taking into account the potential risks and industry know-how.
Focused on the entire life cycle of the equipment, the Excelec Guide describes a largerange of operations aimed at checking and preserving the life of an electrical installation, and establishing the level of complexity of each maintenance operation.
The Guide also recommends the optimal frequency of the various operations, adapted to the corresponding phase of the equipment life cycle, to anticipate specificneeds and allow overall cost optimisation.
This Excelec Guide is, above all, an aid for a dialogue between the maintenance provider and the client, intended to clarify the discussion and to establish basic reflexes concerning maintenance.
It also allows the client to build up a maintenance plan and to take advantage of regular servicing operations by a maintenance specialist to assess his installation.
Thanks to the product knowledge and long-term vision of the maintenance specialist, the client can also get advice on how to develop or update his investmentplan, based on expert recommendations, and thereby be able to control his overall operating costs.
The maintenance specialist, based on his know-how and perfect familiarity with the equipment, is able to offer the appropriate operation corresponding to the life-cycle stage of the equipment, and can give guidance on optimised maintenancemanagement, which can extend the equipments useful life.
INSTALL
OPERATE
VERIFY
MAINTAIN
-
FIVE EXCELECLEVELS
LEVELRoutine maintenanceMaintenance operations are generally described in the maintenance guide given by the manufacturer.For example: adjustment, level checks, replacement of consumable parts.
LEVELActions requiring simple procedures and/or support equipment (integrated into the equipment or outside it) simple to use or to implement.Maintenance operations are generally described in the maintenance guide given by the manufacturer.For example: Replacement/exchange of components, simple inspections.
LEVELOperations requiring complex procedures and/or support equipment which are either complex to use or to implement.For example: replacement of manufacturer's original parts, complex adjustments, realignment.
LEVELOperations involving procedures which imply the mastery of a particular technique or technology and/or the implementation of specialized support equipment.For example: Technical upgrading, change of function performance, change of use.
LEVELOperations involving procedures which imply expertise, requiring particular techniques or technologies, processes and/or industrial support equipment.For example: general overhaul with complete dismantling of equipment, replacement of obsolete or worn-out equipment.
5
4
3
2
1
NB: Extracts from Afnor Standard FDX 60-000, Industrial Maintenance, dated May 2002. Determination of maintenance levels.
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
TECHNICAL DATA SHEETSJuly 2007
Low voltage power distribution schwitchboards and motor control centres
Monitoring and measurement equipment
Protection relays
Cubicle with circuit breaker and MV associated protection
MV Circuit-breaker operating mechanisms
MV circuit switch cubicle
Distribution transformer
Minimum oil circuit breakers
SF6 Circuit breakers
Circuit-breaker operating mechanisms
Disconnectors
Surge arrestors, CTs, VTs
GIS equipment
Power transformer
LV : Low VoltageMV : Medium VoltageHV : High Voltage
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
LOW VOLTAGE POWER DISTRIBUTION SCHWITCHBOARDS AND MOTOR CONTROL CENTRES
LV
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Electrical room: In case of switchboard 2- Levelness of support/Alignment extension
Upgrade: According to upgrade- Extension according
to TTA/PTTA definition 4
- Updating of software According to manufacturers instructions
Indications:- Check on indicators Every month 1
(indicator lights, mechanical indicators, etc...)
- Check on values indicated Every two years 2by measuring equipment
Enclosure:- Efficiency and presence Every year
of interlocking devices
- Cover panel and partition Every year(doors, form covers, automatic 1shutters, screws, keys, etc...)
- General appearance: cleanliness, Every yearpresence of humidity, oxidation
- Strain Every year
- Dedusting of switchboard Every year
LOW VOLTAGE SWITCHBOARDS
-
LOW VOLTAGE POWER DISTRIBUTION SCHWITCHBOARDS AND MOTOR CONTROL CENTRES
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Connections:- Heating Every year 3
- Power connection According 3checks (busbars, to manufacturers terminations and busbar instructionsupports)
- Downstream power connection Every year 3checks (connecting pads, cable mechanical strength)
- Earth connection checks Every year 3
- Clamp connection checks Every year 3(wear and greasing)
- Auxiliary connection checks Every year 2
Switchgear and controlgear:- Dedusting Every year 1
- Protection setting according During commissioning 2to discrimination study
- Check on switchgear Every 3 years 3wearing parts (main contacts, arcing chamber)
- Opening/closing checks Every year 1
Electrical environment:- Harmonic content checks Depending on changes 1
in downstream loads
LOW VOLTAGE SWITCHBOARDS
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
LV
-
MONITORING AND MEASUREMENT EQUIPMENTDigital Control Systems, Remote Terminal Units, Event Recorders, Fault Recorders, Transducers, Meters
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Fan filter replacement Every year 2
Fan/drive system Every year 2rack checking
Computer fan checking Every year 2
Power supply checking Every year 2(noise level)
Event log analysis Every year 2and checking
Connection checking Every year 2
Cabling check Every year 2
Battery check / replacement Every 5 years 2(CPU, SRAM)
Checking and tightness of test Every 5 years 2and connection units
Electronic components Every 10 years 5aging study (where applicable)
Electrical network setting On any electrical 5checking and modification network change
Software upgrade According to manufacturers 4instructions
Hardware upgrade On change request 4
MONITORING AND MEASUREMENT EQUIPMENT
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
MV/LV
-
PROTECTION RELAYSDistance, line differential, Busbar, feeders, motors, generators
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Connexion check Every year 2
Cabling check Every year 2
Secondary injection testing Every year to
Backup battery Every 5 years 2checking / replacement (digital relays)
Checking and tightness Every 5 years 2of test and connection units
Electronic components Every 10 years 5aging study (analogue relays)
Electrical network settings, Upon any electrical 5checking and modification network change
Software upgrade According to manufacturers 4(digital relays) instructions
Equipment upgrade On change request or 4according to manufacturers instructions
43
PROTECTION RELAYS
(according to type of protection)
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
MV
-
OIL CIRCUIT BREAKERS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
General state visual checking, Every year, energized 1cleanliness, insulator condition, oxidation, no corrosion of supporting structure, etc.
Reading operating counter Every year 1
Tightness checking of: Every year, 2- Screws of supporting structure - energized- High Voltage (HV) connections - de-energized
Check on general state and absence Every year, energized 2of traces of overheating on earthing connections
Oil level checks; Every year, energized 2Tightness testing
Check on operating times Every 3 years, de-energized 3and synchronization
Insulator cleaning Every 3 years, 2energized or de-energized
Measurement of dielectric losses Every 3 years, de-energized 4(poles, dielectric oil, insulating transmission oil if necessary)
Measurement of main Every 3 years, de-energized 4contact resistance
Replacement of dielectric oil Every 5 years, de-energized 2
Wear checks on arcing contacts Every 5 years, 4depending on use
Renovation and upgrading Every 20 years 4
CIRCUIT BREAKERS
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
MV
-
SF6 CIRCUIT BREAKERS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
General state visual checking, Every year, energized 1cleanliness, insulator condition, oxidation, no corrosion of supporting structure, etc...
Reading operating counter Every year 1
Tightness checking of: Every year, 2- Screws of supporting structure - energized- High Voltage (HV) connections - de-energized
Checking of overall condition Every year, energized 2and earthing connections (no sign of overheating)
SF6 pressure Every 3 years 2checking
Cleaning of insulators Every 3 years, 2(Particular risk: energized or de-energizedunder-pressure insulators)
Check on Every 3 years, de-energized 4operating times and synchronization
Checking of Every 5 years, de-energized 4density meter operation and gas quality
Resistance measurement Every 5 years, de-energized 4on main contacts
Replacement of capacitors Every 5000 operations 5or 25 years de-energized
Renovation and upgrading Every 20 years 5
CIRCUIT BREAKERS
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
MV
-
CIRCUIT-BREAKER OPERATING MECHANISMS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Reading operating counter Every year 1
Checking of Low Voltage terminals Every 5 years 2and Low Voltage connections
Checking of the oil level Every year, energized 1and the absence of leakagesReading of pump counter
Visual checking Every year 1of electrical equipment and safety devices
Checking of hydraulic Every 40 months 2safety devices as per regulation(valves, discharge valves)
Checking of pressure switch thresholds Every 5 years, energized 2and local/remote indicators
Oil filter replacement Every 5 years 2
Cleaning of tanks and circuits, Every 10 years, 3oil replacement de-energized
Accumulator replacement Every 10 years 4and/or requalification
Change of flexible pipes Every 15 years 4and check on connections
Upgrading and/or replacement Every 15 years 5of control units, cylinders, hydraulic pumps
ALL MECHANISMS
HYDRAULIC MECHANISMS
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
HV
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
-
DISCONNECTORS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
General state visual checking, Every year, energized 1cleanliness, insulator condition, oxidation, no mounting corrosion, etc...
Check on overall condition and Every year, energized 2earthing connections (no sign of overheating)
Tightness checking on: Every year, 2- Screws of supporting structure - energized- HV connections - de-energized
Check on operating mechanism; Every year 1check on low voltage components
Complete operating cycle Every year, de-energized 1for each equipment
Infrared thermography Every year, energized 3
Check on safety devices Every year 2(locking, indications)
Wiring state, tightening of Every 3 years 1terminal blocks, checking of heating resistor and indications
Cleaning and checking of post insulators, Every 3 years, de-energized 2greasing of moving components and connecting rod assemblies
Check on operating Every 3 years 3parameters and mechanical torque
Measurement of Every 3 years 3main contact wear
Repair and/or replacement of wearing Every 15 years, 4parts (elastomer thrust stops, depending on joint pins, plastic bearings, conditions of usepropulsion, etc.)
DISCONNECTORS
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
HV
-
SURGE ARRESTORS, CTS, VTS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Visual check: general appearance, Every year, energized 1cleanliness, cracks, corrosion on supports, etc...
Insulator cleaning Every 3 years, energized 2or de-energized
Tightening checks: Every year 2support structure bolts, HV and energized LV circuit connections de-energized
IR thermographic checks Every year, energized 3
Reading of discharge counters Every year 1
Earthing connection check Every year 1
Leak current check Every 3 years 4
Oil level check and leakage Every year 1identification and pinpointing
Oil sampling for analysis Every 5 years, de-energized 1
Secondary loads & load Every 5 years 3factor measurement
SF6 pressure check, Every year, energized 2leakage pinpointing and tapping-off
Secondary loads & load Every 5 years 3factor measurement
ALL
SURGE ARRESTOR
OIL INSULATED CTS AND VTS
SF6 INSULATED CTS AND VTS
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
HV
-
CUBICLE WITH CIRCUIT BREAKER AND MV ASSOCIATED PROTECTION
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Cleaning of cubicle and internal Every 3 years, de-energized 1equipment (voltage and current transformers)
Checking of busbar connections, Every 3 years, de-energized 2tightening according to value recommended by manufacturer
Cleaning and greasing Every 3 years, de-energized 2of earthing switch
Checking of earthing Every 3 years, de-energized 3switch mechanism
Opening and closing Every year if possible, 1of earthing switch or every 3 years
Checking of voltage and Every 3 years, de-energized 4current transformers (overheating marks, cracks, etc...)
Checking of withdrawal Every 3 years, de-energized 3mechanism and shutters
Checking of locking Every 3 years, de-energized 3mechanism function
Checking of the position indicators Every year, energized 1and signalling switches
AIR INSULATED MV CUBICLE
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
MV
-
CUBICLE WITH CIRCUIT BREAKER AND MV ASSOCIATED PROTECTION
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Checking of opening and closing times, After 10 years or 4contact synchronization, closing 10 000 operations and tripping speed, measuring whichever occurs the earlier, of contact resistance then every 3 years
Checking, cleaning and greasing Every 3 years, de-energized 2of fixed and moving contacts of withdrawable parts
Checking of the components Every 3 years 4in the latching mechanism, replacement if necessary
Visual inspection of mechanism Every year 1and electrical equipment, and safety devices
Visual checking Every year 1of external coupling rods
Cleaning and greasing Every 5 years 3
Replacement of wearing parts Every 5 years 3
Equipment opening Every year, de-energized 1and closing cycle
Checking of protection relay Every year, de-energized 4
Checking of upstream Every year, de-energized 4and downstream selectivity
CIRCUIT BREAKER
ASSOCIATED PROTECTION
* in normal operating conditions
MV
-
MV CIRCUIT-BREAKER OPERATING MECHANISMS
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Visual examination of mechanism, Every year 1electrical equipment and safety devices
Visual examination Every year 1of external coupling rods
Cleaning and greasing Every 3 or 5 years to
Replacement Every 3 or 5 years toof wearing parts and check on latching
Replacement of motor After 10 000 operations 4
Replacement of operation After 10 000 operations 4counter
Replacement of closing After 10 000 operations 4and tripping springs
Check on fastening of nuts Every 3 years 2and bolts and presence of safety devices
43
43
MV CIRCUIT-BREAKER MECHANISMS
* in normal operating conditions** according to the type of circuit-breaker
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
MV
**
**
-
MV CIRCUIT SWITCH CUBICLE
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Visual examination and cleaning Every year 1
Cleaning and greasing Every 3 years, de-energized 2of main contacts
Check on active part and Every 3 years, de-energized 2resin enclosures (overheating marks, cracks, dust, etc...)
Visual inspection Every 3 years, de-energized 3of busbars and tightening
Check on the absence Every 3 years, de-energized 2of corona traces on the MV cable ends
Removal, cleaning Every 3 years, de-energized 4and greasing of mechanism
Cleaning and greasing Every 3 years, de-energized 3of earthing switch where applicable
Check on earthing Every year if possible 2switch mechanism or every 3 years
Check on MV fuses Every 5 years, de-energized 4and comparison with manufacturer's data
Check on system Every 3 years, de-energized 3for tripping by MV fuses
Mechanical test (closing, tripping, Every 3 years, de-energized 4locking mechanism)
Electrical and operating tests Every year, energized 3
Check on auxiliary contacts Every year, energized 2and position indicators
* in normal operating conditions
MV
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
-
A GUIDE TO BEST PRACTICE
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
23 rue Galile - 75116 PARIS | Tl/Fax +33 (0)1 40 70 07 [email protected] | www.gimelec-promotion.fr
Gim
lec
Pro
mot
ion
- Al
l rig
hts
rese
rved
- E
ditio
n Ju
ly 2
007
LEVELRoutine maintenanceMaintenance operations are generally described in the maintenance guide given by the manufacturer.For example: adjustment, level checks, replacement of consumable parts.
LEVELActions requiring simple procedures and/or support equipment (integrated into the equipment or outside it) simple to use or to implement.Maintenance operations are generally described in the maintenance guide given by the manufacturer.For example: Replacement/exchange of components, simple inspections.
LEVELOperations requiring complex procedures and/or support equipment which are either complex to use or to implement.For example: replacement of manufacturer's original parts, complex adjustments, realignment.
LEVELOperations involving procedures which imply the mastery of a particular technique or technology and/or the implementation of specialized support equipment.For example: Technical upgrading, change of function performance, change of use.
LEVELOperations involving procedures which imply expertise, requiring particular techniques or technologies, processes and/or industrial support equipment.For example: general overhaul with complete dismantling of equipment, replacement of obsolete or worn-out equipment.
5
4
3
2
1
NB: Extracts from Afnor Standard FDX 60-000, Industrial Maintenance, dated May 2002. Determination of maintenance levels.
-
DISTRIBUTION TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Commissioning of transformers: At commissioning- Preparation for shipment 1
- Shipment Unloading 1
- Erection Installation 3
- Other operations 4(oil filling)
- Checks (protection systems, 3automatic controls)
- Commissioning 4
Repair/refurbishment in factory: During repair/ - On-site diagnosis refurbishment in factory 5
- Preparation for shipment 1
- Shipment - Unloading 1
- Untanking 4
- Expert appraisal 4
- Active part dismantling 5
- Calculation and design 4
- Repair of accessories 4
- Coil winding 5
- Connections 4
DISTRIBUTION TRANSFORMER
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
* in normal operating conditions
-
DISTRIBUTION TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Repair/refurbishment in factory:(continued)- Work on magnetic core 5
- Active part reassembly 5
- Tanking 5
- Oil filling 4
- Oil filtration in factory During repair/ 4refurbishment in factory
- Electrical tests in factory 5
- Painting and coating 3
- Preparation for shipment 2
- Oil purification 5or regeneration
On-site repair/refurbishment: During repair/ - On-site diagnosis refurbishment in factory 4
- Preparation for untanking 4
- Untanking 4
- Expert appraisal 5
- Active part dismantling 5
- Calculation and design 4
DISTRIBUTION TRANSFORMER
* in normal operating conditions
-
DISTRIBUTION TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Repair/refurbishment in factory:(continued)- Refurbishment of accessories 3
- Coil winding 5
- Shipment of windings to site 3
- Connections 4
- Work on magnetic core 5
- Active part assembly During repair/ 5refurbishment in factory
- Tanking 5
- Oil filling operations 3
- Protection system checking 3
- Commissioning 4
- Oil purification 5and regeneration
- Destruction of 3polluted transformers
DISTRIBUTION TRANSFORMER
* in normal operating conditions
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
DISTRIBUTION TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Oil analyses: Every year- Oil sampling 2
- Basic analyses 3
- PCB content analysis 5
- Dissolved gas 5and furanic analyses
- Results interpretation 5
Maintenance: Every year- Visual check (endoscopy) 2
- Oil sampling and analysis 2
- LV electrical testing 3
- Environmental checks 3(pollution and fires)
- Partial discharges 5
- HV electrical testing 5
- Noise test 3
- Infrared thermography 3
- Oil level (except for integral-filling devices) 2
- Air dryer maintenance 2
- Air dryer replacement 4
- Dessicant breather replacement 2
DISTRIBUTION TRANSFORMER
* in normal operating conditions
-
DISTRIBUTION TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Maintenance (continued): Every year- Check of transformer's 3
protection systems
- Bushing cleaning Every year 2
- Transformer compartment Every year 2cleaning
- Visual check for leakage Every year 2
- Leakage repair if necessary 2
- Gasket replacement if necessary 4
- Bushing replacement if necessary 4
- Accessories check Every year 4
- Accessories replacement if necessary 3
- Refurbishment of auxiliary equipments if necessary 2
- Oil filtration if necessary 3
- Installation of retention tanks if necessary 4
- Installation of if necessary 3fire protection systems
- Transformer moving if necessary 3
- Painting if necessary 3
- Coating if necessary 3
- Oil retrofilling, purification if necessary 5and regeneration
DISTRIBUTION TRANSFORMER
* in normal operating conditions
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
GIS EQUIPMENT
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Erection & Commissioning In case of re-assembly of 4supervision a component (circuit breaker,
disconnector, ) after repair
Erection: In case of re-assembly of 2- GIS assembly under a component (circuit breaker,
responsibility of supervisor disconnector, ) after repair
Dielectric tests/detection In case of re-assembly of 5of partial discharges: a component (circuit breaker, - To validate re-assembly disconnector, )
after repair after repair
IR thermographic check Every 5 years, energized 3
Optical indicators Every 5 years, de-energized 1operating check
SF6 filling valves Every year, de-energized 1& operating mechanisms labeling check
Cubicle heating resistors Every year, de-energized 1operating check
LV wiring connections Every 5 years, de-energized 2check
Mechanisms and alarms Every 5 years, de-energized 2check
Cubicle tightness Every 15 years, de-energized 1check
GENERAL
* in normal operating conditions
HV
-
GIS EQUIPMENT
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Pressure check with Every year, when energized 1permanent pressure gauge (if applicable)
Pressure check with Every 5 years, de-energized 1appropriate tool
SF6 quality check Every 5 years, de-energized 2
SF6 leakage pinpointing Every 5 years, de-energized 2
Density switch checking Every 5 years, de-energized 2(including wiring connections), check from control room
Operating time checks Every 5 years, de-energized 3(main and auxiliary contacts)
Contact wear check Every 5000 operations, 4de-energized
Capacitor replacement Every 5000 operations 5or 25 years, de-energized
Circuit-breaker control Every 15 years, de-energized 3rod adjustment check (if applicable)
Renovation and upgrading Every 20 years, de-energized 5
SF6
CIRCUIT BREAKERS
* in normal operating conditions
HV
-
GIS EQUIPMENT
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Mechanical function Every 5 years, de-energized 3checks (locking, interlocking, auxiliary contacts)
Lubrication Every 5 years, de-energized 1
Contact inspection Every 5000 operations, 4de-energized
Mechanical function checks Every 5 years, de-energized 2(locking, interlocking, auxiliary contacts)
Lubrication Every 5 years, de-energized 1
Leaking current measurement Every 15 years, de-energized 3
Reading of discharge Every year 1counters
DISCONNECTORS
EARTHING SWITCHES
EQUIPMENT: SURGE ARRESTORS
* in normal operating conditions
HV
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
POWER TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Switching of off-load tap changer Every year, de-energized 1
Overall look: cleanliness, moisture Every year 1content and oxidation. Frequency: yearly
Search for leaks, Every week 1unusual noises, hot spots
Visual check on Every year 1HV-MV-LV bushings
Air dryer check Every year 1
Visual check on Every year 1electrical auxiliary cabinet
Oil level check Every 6 months 1
Check of the dessicant Every 6 months 1breather condition
Maintenance of air coolers / water coolers:- Heat exchanger cleaning Every year 2
- Beam cleaning Every year 2
- Motor-powered fan Every 5 years or upon failure 2
Dielectric oil analysis :- Physico-chemical Every year 3
- Dissolved gas analysis Every year 3
- Particles counting, search for Every 5 years 3furfural and its derivatives
POWER TRANSFORMER
* in normal operating conditions
-
POWER TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Check on HV and LV connections Every year 3
On-load tap changer:- Operating and safety Every year 2
checks
- Oil analysis Every year 3
- Complete overhaul of OLTC Every 5 years 4including replacement of parts and oil (to be replaced every 50 000 or 100 000 operations if circuit filtered permanently)
Check on transformer accessories:- Oil level Every year 1
- Cooling system check Every year 2
- Filter clogging Every year 2
- Oil circuit check Every year 2
- Thermostat Every year 2
- Buchholz relay Every year 3
- RS 2000 and 2001 relays Every year 3
- Protection relays for Every year 3transformer and OLTC
POWER TRANSFORMER
* in normal operating conditions
-
POWER TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Other maintenance work:- Tank and pipes painting-coating Every year and maintenance 2
work if necessary
- Oil filtration Every 5 years 3according to oil analyses
- Replacement or oil According to results,retreatment dissolved gas
analyses
- Tan delta values on transformer Every 5 years or or bushings on incident
- Replacement of HV/LV/N bushings As per Tan delta 4results
- Replacement of motor-powered fan According to 3insulation results
- Change of circulation pump 3
- Change of oil 3circulation indicator
- Replacement of thermometers 3
- Replacement of relief valve 3
- Replacement of Buchholz relay 3
Expert appraisal upon failure:- Nature and origin of the failure 4
- Operating background 4analysis
Upon failure- Oscilloperturbograph 4
analysis
- Oil analyses (Buchholz gas, 3DGA, furfural, PCB
POWER TRANSFORMER
* in normal operating conditions
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
-
EXCELEC DATA SHEETS
PRESERVING & MAINTAINING YOUR ELECTRICAL EQUIPMENT
POWER TRANSFORMER
EQUIPMENT DESCRIPTION RECOMMENDED EXCELEC OF THE OPERATION FREQUENCY* LEVEL
Expert appraisal upon failure (continued):- Electrical measurement: 3
Ratios Resistance Impedance Insulation Upon failure
- Endoscopy 3- On-site expertise:
Results interpretation 5 Definition of the type of repair
(on site, in workshop) 4and operating process
On-site repair:- Without untanking 4
Upon failure- With untanking and expert 5
appraisal of active part
Repair in factory (with untanking)- Disassembly to view the fault 5
+ validation of the repair process
- Expert appraisal (causes Upon failure 5and origin of fault)
- Reassembly and tests 5
POWER TRANSFORMER
* in normal operating conditions
Tel.
: +33
(0)1
40
70 0
7 69
w
ww
.gim
elec
-pro
mot
ion.
fr
gim
elec
-pro
mot
ion@
gim
elec
-pro
mot
ion.
fr
All
right
s re
serv
ed
Edi
tion
July
200
7
/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 150 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 72 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 300 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile (None) /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False
/Description >>> setdistillerparams> setpagedevice