Maintenance Philosophy ELK 1, 2, 3 - ABB Group 3, 2013 | Slide 2, 1HC0088391_E01_AA ... report * Information is ... Example – Maintenance Philosophy

Maintenance PhilosophyService High Voltage Products, Transmission GIS, January 2012

ELK 1, 2, 3

© ABB GroupDecember 3, 2013 | Slide 2, 1HC0088391_E01_AA

Gas Insulated SwitchgearMaintenance Philosophy

Maintenance Philosophy for GIS type ELK1, 2, 3

time basedmaintenance

condition basedmaintenance

Criteria§ ≥ 20 years of operation for

indoor application§ ≥ 10 years of operation for

outdoor application

Criteria§ Maximum No of CO* operation is

reached§ Maximum No of SCC* switch

operation is reached§ Combination of No of CO* and

SCC*§ Recommendation in diagnosis

report

* Information is mentioned in operational manualCO: close-open operationSCC: short circuit breaking current


Maintenance Philosophy

§ TBM definition§ The criteria for time-based maintenance are aging of

material based on environmental conditions ofinstallation

§ CBM definition§ CBM is to maintain the correct equipment at the right

time. With CBM you can exchange just thecomponents or parts that have been subjected to themost wear over their many years of reliable operation

§ The most efficient way for contributing to life timeexpansion is following maintenance strategy combined withproduct improvements and support services.

TBM & CBM Definition



§ Dynamic Sealing Kit contents:§ Replacement of dynamic stressed sealings§ Adsorber (filter)

TBM Time Based Maintenance

time basedmaintenance

Criteria§ ≥ 20 years of operation for

indoor application§ ≥ 10 years of operation for

outdoor application

Replacement of:§ Dynamic Sealing Kit CB§ Dynamic Sealing Kit DS§ Dynamic Sealing Kit ES§ Dynamic Sealing Kit FAES



§ Overhaul contents:§ Replacement of dynamic stressed sealings§ Adsorber (filter)§ All contact parts which are affected during switching,

mechanical wearing

CBM Condition Based Maintenance


Product§ Overhaul CB§ Overhaul DS§ Overhaul ES§ Overhaul FAES§ Overhaul Drive

HMB, AHMA, HKA, SN§ Retrofit instead of overhaul

Criteria§ Maximum No of CO* operation is

reached§ Maximum No of SCC* switch

operation is reached§ Combination of No of CO* and

SCC*§ Recommendation in diagnosis

report

* Information is mentioned in operationalmanual



§ Pilot Overhaul contents:§ Replacement of dynamic stressed sealings§ Absorber (filter)§ All contact parts which are affected during switching,

mechanical wearing§ Laboratory analysis of material/contact parts with

report document

CBM Condition Based Maintenance


Product§ Pilotoverhaul bay§ Pilotoverhaul CB

Criteria§ If the data are not available?

SF6 Gas Insulated SwitchgearMaintenance of circuit-breaker

Service High Voltage Products, Transmission GIS, January 2012

© ABB03/12/2013 | Slide 7


Maintenance of circuit-breaker

§ If max. life time of dynamic sealings has been reached§ >20 years for indoor application§ >10 years for outdoor application

à Dynamic Sealing Kit

§ If max. number of operation have been reached§ Max number of close-open operation

(2’000 / 5’000 / 10’000 CO, exact figure is mentioned inoperational manual)

§ Max number of short circuit breaking current(10 / 15 / 20 times the max. breaking current, exact figureis mentioned in operational manual)

§ Combination of close-open operations andshort circuit breaking current

à Overhaul

When do you need to maintain?



§ If no information available about number of operations andnumber of short-circuit breaking current and the circuit-breaker is older 10 years

à Diagnosis or Pilotoverhaul




§ De-commissioning of circuit-breaker includes gas quality check, gas leakagecheck, travel curve and dynamic resistance measurement

§ Installation of Dynamic Sealing Kit§ Re-commissioning of circuit-breaker includes gas quality check, gas leakage

check, travel curve and dynamic resistance measurement

1. Linear movementbushing

2. Operating road3. Support insulator4. Current

connection5. Chamber insulator6. Filter / Adsorber7. Current

connection

Dynamic Sealing Kit – scope of work




§ Installation of Overhaul Kit§ Re-commissioning of circuit-breaker includes gas quality check, gas leakage

check, travel curve and dynamic resistance measurement




connection8. Puffing cylinder9. Diaphragm10. Erosion finger,

cylinder base,auxiliary nozzle,contact ring

11. nozzle12. contact finger,

finger retainer13. fixed contact pin

Overhaul – scope of work




§ Installation of Overhaul Kit§ Re-commissioning of circuit-breaker includes gas quality check, gas leakage

check, travel curve and dynamic resistance measurement§ Laboratory investigation of contacts§ Detailed laboratory report§ Maintenance recommendation for the rest of circuit-breakers within the GIS




connection8. Puffing cylinder9. Diaphragm10. Erosion finger,

cylinder base,auxiliary nozzle,contact ring

11. nozzle12. contact finger,

finger retainer13. fixed contact pin

Pilotoverhaul – scope of work



§ Significant lifetime extension§ Reduced failure risk§ Cost effective solution (compared to unplanned activities)§ Minimized and planned outage time§ Maintain the value of the circuit-breaker§ Maximize switchgear performance§ Identify problems at an early stage, prior to escalation

acquisition of background information for tailoredmaintenance activities through pilot overhaul

Advantages of planned maintenance

SF6 Gas Insulated SwitchgearMaintenance of disconnector switch


© ABB03/12/2013 | Slide 14


Maintenance of disconnector switchAllocation of disconnector switches within GIS


Maintenance of disconnector switchAllocation of disconnector switches within GIS

Disconnectoroperating mechanism(for 3 phases)

Disconnectorswitches

Connecting rod


Maintenance of disconnector switch

§ Axial Disconnector§ TE

§ Cross Disconnector§ TX

§ Angle Disconnector§ TV

§ TW

Types of disconnector switches


Maintenance of disconnector switchOverview of disconnector switch

disconnectoroperatingmechanism

disconnectorswitch

earthingswitch

bushingcircuit-breaker



§ If max. life time of dynamic sealings has been reached§ >20 years for indoor application§ >10 years for outdoor application

à Dynamic Sealing Kit


(2’000 / 5’000 CO, exact figure is mentioned inoperational manual)

§ Max number of bus transfer current switching(100 CO @1600A / <40A exact figure is mentioned inoperational manual)

à Overhaul




§ De-commissioning of disconnector switch includes gas quality check, gasleakage check, motor current and running time measurement

§ Installation of Dynamic Sealing Kit§ Re-commissioning of disconnector switch includes gas quality check, gas

leakage check, motor current and running time measurement

Dynamic Sealing Kit – scope of work

Seal-ring

Seal strip

O-ring




§ Installation of Overhaul Kit§ Re-commissioning of disconnector switch includes gas quality check, gas

leakage check, motor current and running time measurement

Overhaul – scope of work

Seal-ring

Seal strip

O-ringFixed contact

Contact tubesupport




§ Installation of Overhaul Kit§ Re-commissioning of disconnector switch includes gas quality check, gas

leakage check, motor current and running time measurement§ Laboratory investigation of contacts§ Detailed laboratory report§ Maintenance recommendation for the rest of disconnectors within the GIS

Pilotoverhaul – scope of work

Seal-ring

Seal strip

O-ringFixed contact

Contact tubesupport

SF6 Gas Insulated SwitchgearMaintenance of operating mechanismAHMA 4/8


© ABB03/12/2013 | Slide 23


Maintenance of operating mechanism AHMA 4/8

§ For overhaul the operating mechanism has to be removedfrom the circuit breaker

Overview

Circuit-breakerOperating mechanism


Maintenance of operating mechanism AHMA 4/8

§ If max. life time of operating mechanism has beenreached§ >20 years for indoor application§ >10 years for outdoor application

à Overhaul


(10’000 CO, exact figure is mentioned in operationalmanual)

à Overhaul



change over valve USR16 (167)plug (40)

guide bush(711, 713)

connecting rod (o)

pump motor (949)carbon brush (300)

bevel wheel (11)dowel pin (103, 104)screw type couplingwith protective cap (123)

non return valve (7)filter (82)

plug for lockingdevice (253)

guiding rod (o)working piston (o)

screw plug (49)

check valve (301)locking screw (119)

screw plug (251)

Maintenance of operating mechanism AHMA 4/8Overhaul – scope of work



Item Replaced Overhauled7 non-return valve for pump11 straight tooth bevel wheel40 plug49 screw plug82 filter103, 104 dowel pin119 locking screw123 screw type coupling with protective cap

167 change over valve251 screw plug253 plug for locking device300 carbon brush for pump motor301 check valve711, 713 guide bush800 sealings949 pump motor

working pistonconnecting rodsguiding rod



§ For outdoor application will be added following scope:

§ position indicator window (28)§ O-ring seal for position indicator (112)§ screws, washers (135, 136)§ rubber seal (171, 1171, 1280)§ sealing for cover (281)

SF6 Gas Insulated SwitchgearMigration Modules


© ABB03/12/2013 | Slide 29

Retrofit Modules

© ABB GroupDecember 3, 2013 | Slide 30

Retrofit Modules


Retrofit Gascompartments


Retrofit Bursting Disc


Retrofit Disconnector


Retrofit Disconnector


SF6 Gas Insulated SwitchgearExample - Maintenance Philosophy


© ABB03/12/2013 | Slide 36


Example – Maintenance Philosophy

Switchgear A

year of installation: 1990circuit breaker: 1900 no of COcircuit breaker: 3 no of SCC(breaking current unknown)disconnector switch: 500 COearthing switches: 150 CO

Example

Switchgear B

year of installation: 1995circuit breaker: 2500 no of COcircuit breaker: 5 no of SCC(breaking current unknown)disconnector switch: 500 COearthing switches 150 CO

Process of data evaluation§ Collecting data from operational manual or on-site

§ Application outdoor or indoor indoor§ Type of breaker SN 211

§ Max. no of close-open operation 5000 CO§ Max. no of short circuit current 15 / 50kA

§ Max. no of operations for disconnector switch 2000 CO§ Max. no of operations for earthing switch 2000 CO


Example – Maintenance Philosophy

Switchgear A

Circuit breaker: Dynamic Sealing Kit à age 21 yearsCircuit breaker drive: Overhaul à age 21 yearsDisconnector switch: Dynamic Sealing Kit à age 21 yearsEarthing switch: Dynamic Sealing Kit à age 21 yearsFast acting earthing switch: Dynamic Sealing Kit à age 21 years

Optional:Migration modules à improvements, if customers want it

for next 25 years

Exemplary solution

Switchgear B

Circuit breaker: Overhaul à combination of CO & SCCCircuit breaker drive: Overhaul à together with CBDisconnector switch: Dynamic Sealing Kit à not requiredEarthing switch: Dynamic Sealing Kit à not requiredFast acting earthing switch: Dynamic Sealing Kit à not required

Optional:Migration modules à not required

Documents

Maintenance Philosophy ELK 1, 2, 3 - ABB Group 3, 2013 | Slide 2, 1HC0088391_E01_AA ... report * Information is ... Example – Maintenance Philosophy