tpc41-63

Note: Concerns queries and comments on this document should be referred to the compiler When downloaded from Transmission database, this document is uncontrolled, responsibility lies with the user to ensure that it is the authorised version

PROCEDURE Document Classification: Public

Unique Identifier: TPC41-63

Document Type: PROCEDURE

Revision: 0

Effective date: DECEMBER 2007

Total pages: 51

Title: CONDITION BASED MAINTENANCE AND MONITORING OF SPRECHER & SCHUH, ENERGIE AND GEC ALSTHOM TYPE HGF SERIES SF6 CIRCUIT BREAKERS

Revision date: JANUARY 2011

COMPILED BY FUNCTIONAL RESP. AUTHORIZED BY …................................. S NKOSI SWG REPRESENTATIVES (See item No 6: Dev. Team)

…........................... R HOPKINS SWG LEADER

…................................. T SHUNMAGUM PPS MANAGER

DATE:…....................... DATE:…....................... DATE:…....................... Content Page

1 Introduction ................................................................................................................................2 2 Document Content .....................................................................................................................2 3 Supporting clauses.....................................................................................................................2 4 Authorisation.................................................................................................................................5 5 Revisions ......................................................................................................................................5 6 Development Team ......................................................................................................................5

Annexes

A Circuit-breaker type: GEC Alstom Sprecher HGF 312 ............................................................. 6 B Circuit-breaker type: GEC Alstom Sprecher HGF 112/1 .......................................................... 12 C Circuit-breaker type: GEC Alstom Sprecher HGF 116/2B 40 kA.............................................. 18 D Circuit-breaker type: GEC Alstom Sprecher HGF 216/2B ........................................................ 24 E Circuit-breaker type: GEC Alstom Sprecher HGF 112/1C........................................................ 30 F Circuit-breaker type: GEC Alstom Sprecher HGF 114/1A ........................................................ 36 G Circuit-breaker type: GEC Alstom Sprecher HGF 115/2C........................................................ 42 H Circuit-breaker type: GEC Alstom Sprecher HGF 116/2B 50 kA.............................................. 46 I Visual inspection check sheet................................................................................................... 51

Unique Identifier TPC41-63 Rev 0

CONDITION BASED MAINTENANCE AND MONITORING OF SPRECHER & SCHUH, ENERGIE AND GEC ALSTHOM TYPE HGF SERIES SF6 CIRCUIT BREAKERS

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1 Introduction

The original document was prepared by the local representatives of the OEM (then GEC, South Africa) and the Switchgear Workgroup (formerly Circuit Breaker Support Team). This document has been prepared to ensure that the maintenance of circuit breakers contained within its scope get scheduled in line with condition based principle. It aims to ensure that the breakers are optimally utilised in their respective circuits and maintenance is structured accordingly to optimise on resources. This is done by basing planned maintenance upon condition due to application. Potential damage by premature intrusive maintenance needs to be avoided.

2 Document Content

This document contains the condition based maintenance intervals and critical inspections to be perform during the life cycle of the particular circuit breaker. This is for the Sprecher & Schuh HGF type circuit breakers. Reference to OEM manuals is made. Reference to OEM manuals is made.

3 Supporting clauses

3.1 Scope

This document covers the Sprecher & Schuh circuit breakers of the following types; 132 kV S&S HGF 312 132 kV S&S HGF 112/1 400 kV S&S HGF 116/2B 400 kV S&S HGF 216/2B 132 kV S&S HGF 112/1C 132kV S&S HGF 114/1A 275 kV S&S HGF 115/2C 400 kV S&S HGF 116/2B 3.1.1 Purpose

This procedure is a tool to be used in conjunction with the OEM’s manual:

a) to form a basis for condition monitoring and maintenance;

b) to help in planning corrective maintenance activities at the right time;

c) to assist maintenance staff when doing their routine maintenance;

d) to do most effective maintenance;

e) to help reduce the risk of equipment malfunctioning; and

f) to be used by Eskom Transmission as a standard document on an ongoing basis.

3.1.2 Applicability

This procedure is applicable to all accredited HV Plant personnel (accreditee) or person under their supervision in accordance with the document TRMPVADB1. The following matrices and maintenance criteria apply to these circuit breakers under normal operating conditions. Also refer to the document



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TST41-42 Rev0: Circuit breaker maintenance standard. The matrices, inspection check sheet, criteria and maintenance shall form the basis for condition monitoring.

3.2 Normative/ Informative references

When doing maintenance also refer to the following documents;

OEM’s maintenance manual for this type of the circuit breaker.

Scope of Works FOR THE S&S SF6 HGF 100 SERIES: TRM-FM-0051 and the TRM-FM-0057

Scope of Works FOR THE S&S SF6 HGF 200 SERIES: TRM-FM-0049 and the TRM-FM-0058

3.3 Definitions 3.3.1 Accredited person (accreditee): A person meeting the requirements laid down in document TRMPVADB1 rev.0.

3.4 Abbreviations

3.4.1 OEM: Original Equipment Manufacturer

3.4.2 SWG: The Switchgear Workgroup

3.4.3 MI: Modification Instruction

3.4.4 SOW: Scope of work

3.4.5 CDM: Configuration and Document Management

3.4.6 OEMD: Official Electronic Maintenance Database

3.5 Roles and Responsibilities

HV Plant accredited personnel (accreditee) or person under their immediate supervision shall be responsible for carrying out these maintenance tasks. It is up to them and their grids to ensure that the data is forwarded to personnel that updates OEMD records.

3.5.1 Actions

3.5.1.1 All grids shall monitor the maintenance programmes for each circuit breaker and all records shall be kept up-to-date and entered into OEMD accordingly;

3.5.1.2 All fault operations shall be recorded and entered OEMD when fault occurs;

3.5.1.3 Mechanism operations for capbanks and reactor breakers shall be recorded and entered into OEMD monthly. For all other breakers this will be done three monthly.

NOTE: If any defects or deviations are found, please contact the SWG or your local switchgear representative.

3.5.2 Matrix interpretation

The matrix sheet of each circuit breaker type shall be used to forecast the type of maintenance and the frequency as marked by a symbol X on the intersection of a corresponding row and column.



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3.5.3 Visual inspection

A visual inspection shall be carried out in accordance with the inspection check sheet (see Annex I).

3.5.4 Recording

A comprehensive report, with photographs, shall be compiled when a contact inspection has been done, stating the condition of components. In case the contractor does this work for the grid, it is advisable to add this requirement on the scope of work. All records shall be uploaded to relevant fields in OEMD:

a) A pre-commission test including finger printing results must be recorded and filed

b) All maintenance and test results must be recorded, compared and filed.

c) Any top-up of SF6 gas shall be recorded.

d) Any tests performed shall be recorded and compared with the original factory test results and the last performed test, to identify any deviations as part of condition monitoring.

3.5.5 Fault current assessment criteria

a) In the absence of fault recording equipment fault trips shall be recorded on log sheets and/or OEMD.

b) By using the maximum fault level at the busbar the number of allowable fault trips shall be calculated by the software program. Refer to the SWG for assistance.

c) The maximum accumulated fault current shall be recorded using fault recording equipment. Also refer to the graph on the OEM’s Maintenance Manual noted on each specific breaker contained in this procedure.

3.6 Implementation Date

The implementation date is December 2007.

3.7 Process For Monitoring

HV Plant circuit breakers/ switchgear maintenance personnel shall ensure that this is communicated to their respective Planning and Performance departments. All staff members that are responsible to plan and schedule maintenance shall ensure the use of this document. Maintenance outages shall be scheduled in consultation with this document.

3.8 Related/ Supporting Documents

OEM Manuals



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4 Authorisation

This document has been seen and accepted by:

Name Designation R Hopkins Corporate Consultant (HV Equipment – Switchgear)

B Ntshangase HV Plant Manager (Eastern grid)

R Hurrypursad HV Plant Manager (North West grid)

J van Zyl HV Plant Manager (Southern grid)

B Clayton HV Plant Manager (Central grid)

A Kotze HV Plant Manager (North East grid)

K van der Westhuizen HV Plant Manager (Western grid)

C van Coppenhagen HV Plant Manager (Northern grid)

M Titus HV Plant Manager (Apollo grid)

Switchgear Workgroup members Representation from Technology, Grids and Commercial

5 Revisions

Date Rev. Remarks

2001 0 A procedure with reference number TRMPVABX7 was registered on the Documentation Centre database.

June 2003 1 This procedure (TRMPVABX7) was revised to meet changes in the organisation

December 2007 0 New numbering (TPC41-63) and format. Minor changes from old TRMPVABX7 Rev. 1

6 Development Team

The following Switchgear Workgroup representatives revised this procedure;

F Hitge

R Dolly

L Ludik

G Ruiters

S Nkosi

JD Fourie

D Jansen S Buffkins S Pretorius



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Annex A

Circuit-breaker type: GEC Alstom Sprecher HGF 312

A.1 Procedure for GEC Alstom Sprecher HGF 312 circuit-breakers

A.1.1 For fault current assessment criteria Use graph on page 53 of the OEM’s manual 42.020.090E to determine the amount of fault trips before a contact inspection.

GEC Alstom HGF 312 circuit-breaker Refer to manual 42.020.090E

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Task Contributing factors or reference

Maintenance tasks

Contact inspection Only after reaching the limit of wear measurement x

Clean and re-lubricate operating linkages x xMechanisms − FKF 1-2

Major inspection and improvements Refer to OEM protocol Q96.0400.E − Q96.0401.E Maintenance report x x

Replace closing springs XMeasurements

Number of fault operations x Timing test close, open and close-open Refer to factory test values x X

Contact wear measurement Refer to graph 42.020.090E page 64 x

Contact resistance test Less than 45 μΩ x XTravel curve x X

Minimum operating voltage 50 % trip and close (to find sticky latches) x X

Spring rewind time Compare to last measurements x XDew point Refer to 42.020.090E page 59 x xSF6 percentage 98% x xClutch slip length Refer to factory value 30 % x x

Visual inspections



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Heater x Loose items in mechanism x Counter readings x Dashpot top cover dry x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature

x

Flange corrosion x

Check all linkages x



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Annex A (Continued)

GEC Alstom HGF 312 circuit-breaker Refer to manual 42.020.090E

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Task Contributing factors or

reference

Visual inspections (continued) Check for corrosion and dust in mechanism x

Door locked and sealing to be checked x Extended checks and

inspections

Heater x Loose items in mechanism x Counter readings x Dashpot top cover dry x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x

Flange corrosion x Check all linkages x Check for corrosion and dust in mechanism x

Door locked and sealing to be checked x

Densimeter settings and alarms (in panel) Pn = 600 Pa S1= 540 Pa S2= 510 Pa @ 20 °C x

Adjust micro-switches if required (Specialist or accreditee) x



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Annex A (Continued)

A.2 Visual inspection, maintenance activities and tests

A.2.1 visual inspection 6 monthly • Heater

• Counter readings

• Dashpot top cover dry

• Condition of porcelain

• Palesit protection (Silicone sealant on cementing of the flanges)

• SF6 pressure reading with ambient temperature recorded

• Flange corrosion

• Check all linkages

• Check loose items in mechanism

• Check for corrosion and dust in mechanism

• Door locked and sealing to be checked

A.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 600 Pa @ 20 °C (Pressure concept) 42.020.090E, Page 6 S1 Non-urgent 540 Pa @ 20 °C Tolerance of ± 10 Pa acceptable S2 Urgent/Lock out 510 Pa @ 20 °C S1 - S2 difference of 0,25 to 0,35 shall be maintained

• Any leak shall be reported • Adjust micro-switches if required (Specialist or accreditee)

A.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations • Visual inspection • Extended checks and inspection

Plus

• Timing test (Close, open and close trip − all coils). Refer to factory values • Any variance in the timing tests shall be investigated fully • Contact Resistance (45 μΩ maximum) • DRM not required • Contact wear measurement if cumulated fault current is reached (15000 kA2) 16 operations at full

load. Refer to graph (42.020.090E, page 53 and Procedure pages 64 to 65). • Coil resistance (220 V d.c. − 135 Ω/110 V d.c. − 35 Ω). • Minimum operating voltage (Actual). 50 % trip/50 % Close.



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Annex A

(Continued)

• Travel Curve − It’s nice to have but is not a requirement from OEM. • Spring rewind time − Compare to the last measurement or factory tests • Dew point − Refer to 42.020.090E, page 59 Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

A.2.4 Major inspection (maintenance tasks) 15 Years (inland) 12 Years (coastal) 2500 operations Mechanism − FKF 1-2

• Major inspection and improvements shall be performed by OEM or OEM accredited personnel. • According to OEM Protocol Q96.0400.E / 05.95 (Inspection)

Q96.0401.E / 05.95 (Improvements)

Closing spring replacement 5000 Operations

Poles

• Contact inspection only after reaching the limit of the wear measurement. • Nozzle inspection only for capacitor and reactor circuit breakers, without point on wave switching relay

only after 2500 operations. • Nozzle inspection only for capacitor and reactor circuit breakers, with point on wave switching relay.

Only after TBA operations. • Clean and re-lubricate operating linkages.

A.3 Spare parts and tools

Refer to the OEM’s manual



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Annex A

(Concluded)

A.5 GEC Alstom Sprecher HGF 312 circuit-breaker fault levels

Busbar kA Fault operations 1 2500 2 2500 3 1556 4 875 5 560 6 389 7 286 8 219 9 173 10 140 11 116 12 97 13 83 14 71 15 62 16 55 17 48 18 43 19 39 20 35 21 32 22 29 23 26 24 24 25 22 26 21 27 19 28 18 29 17 30 16 31 15

31,5 14



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Annex B

Circuit-breaker type: GEC Alstom Sprecher HGF 112/1

B.1 Procedure for GEC Alstom Sprecher HGF 112/1 circuit-breakers

B.1.1 For fault current assessment criteria

Use graph on page 36 of the OEM’s manual 42.020.055E to determine the amount of fault trips before the contact inspection shall be done.

B.1.2 Special Modification

The arcing shield inside the arcing chamber should be modified on all frequent operating breakers (especially capbanks and rectors circuit breakers). This should be done according to OEM specifications.



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Annex B (continued)

GEC Alstom HGF 112/1 circuit-breaker

Refer to manual 42.020.055E

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Maintenance tasks Poles

Replace all arcing contacts Refer to OEM improvements of May 2000 x

Contact wear measurement Refer to manual 42.020.055E page 36 x

Nozzle inspection Only capacitor banks and reactors x xClean and re-lubricate operating linkages x x

Replace top cover seal using M111, new washers

Water penetrating through springwasher x

Mechanisms


Replace closing springs xMeasurements

Number of fault operations x Timing test close, open and close-open Refer to factory test values x xContact resistance test Less than 35 μΩ x xTravel curve x x

Minimum operating voltage 50 % trip and close (to find sticky latches) x x

Spring rewind time Compare to last measurements x xDew point Refer to 42.020.020E page 31 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x xVisual inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x



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Flange corrosion x

Annex B

(Continued)

GEC Alstom HGF 112/1 circuit-breaker


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Visual inspections (continued) Check all linkages x Check for corrosion and dust in mechanism x

Door locked and sealing to be checked x Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x


Door locked and sealing to be checked x Densimeter settings and alarms (in panel)

Pn=550 Pa S1=490 Pa S2=460 Pa @ 20 °C x




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Annex B

(Continued)

B.2 Visual inspection, maintenance activities and tests

B.2.1 Visual inspection (on-line) 6 monthly

• Heater • Counter readings • Oil level in dashpot • Condition of porcelain (silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded • Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

B.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 550 Pa @ 20 °C (Pressure concept B) 42.020.055E, Page 5 S1 non-urgent 490 Pa @ 20 ° C Tolerance of ± 50 Pa acceptable S2 Urgent/Lock out 460 Pa @ 20 ° C S1 - S2 difference 0,25 to 0,35 shall be maintained

• Any leak shall be reported • Adjust micro-switches if required (Specialist or accreditee)

B.2.3 Condition monitoring test 15 yearly (inland) 12 yearly (coastal) 2 000 operations

• Visual inspection • Extended checks and inspection

Plus

• Timing test (Close, open and close trip − all coils). Refer to factory values • Any variance in the timing tests shall be investigated fully • Contact resistance (35 μΩ maximum) • DRM not required • Carry out contact inspection if cumulated fault current is reached (15000 kA2) 15 operations at full

load. Refer to graph (42.020.055E, page 36)



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Annex B

(Continued)

• Coil resistance (220 V d.c. − 135 Ω/110 V d.c. − 35 Ω) • Minimum operating voltage (actual). 50 % trip/50 % close • Check if screen cap and absorber are modified (if not, do the modification as per OEM requirement) • Travel curve − It’s nice to have but not a requirement from OEM • Spring rewind time - Compare to the last measurement or factory tests • Dew point − Refer to 42.020.020E, page 31. Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

B.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2000 operations Mechanism

• Major inspection and improvements to be performed by OEM or OEM accredited personnel. • According to OEM protocol Q96.0402.E / 05.95 (Inspection) Q96.0406.E / 02.97 (Improvements)

Closing spring replacement 5000 operations

Poles

• Contact inspection after reaching cumulative fault current limits • Replace all arcing contacts after 2000 normal operations • Nozzle inspection only for capacitor and reactor circuit-breakers (2000 operations) • Clean and re-lubricate operating linkages • Replace top cover seal using silicone M111, Loctite 225 and new washers (discard spring washers

completely)

B.3 Spare parts and tools




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Annex B

(Concluded)

B.6 GEC Alstom Sprecher HGF 112/1 circuit-breaker fault levels

Busbar kA Fault operations 1 2500 2 2500 3 1556 4 875 5 560 6 389 7 286 8 219 9 173

10 140 11 116 12 97 13 83 14 71 15 62 16 55 17 48 18 43 19 39 20 35 21 32 22 29 23 26 24 24 25 22 26 21 27 19 28 18 29 17 30 16 31 15

31,5 14



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Annex C

Circuit-breaker type: GEC Alstom Sprecher HGF 116/2B 40 kA

C.1 Procedure for GEC Alstom Sprecher 116/2B 40 kA circuit-breaker

C.1.1 For fault current assessment criteria

Use graph on page 49 of the OEM’s manual 42.020.020E to determine the amount of fault trips before the contact inspection shall be done.



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Annex C (Continued)

GEC Alstom HGF 116/2B 40 kA circuit-breaker


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Task Contributing factors or reference Maintenance tasks

Contact inspection After reaching the limit of wear measurement x x

Nozzle inspection Only capacitor banks and reactors without POW x

Nozzle inspection Only capacitor banks and reactors with POW x

Clean and re-lubricate operating linkages x x

Replace bottom support insulator seal using M111 Coastal areas only x

Mechanisms


Replace closing springs XMeasurements

Number of fault operations x Timing test close, open and close-open Refer to factory test values x x

Contact wear measurement Refer to graph 42.020.020E page 45 xContact resistance test Less than 45 μΩ x xTravel curve x x


Spring rewind time Compare to last measurements x xDew point Refer to 42.020.020E page 31 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x xVisual inspections Loose items in mechanism x Counter readings x Oil level in dashpot x



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Condition of porcelain x Silicon sealant on cementing of flanges x

Annex C

(Continued)



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Task Contributing factors or reference Visual inspections (continued) SF6 pressure reading at ambient temperature x


Door locked and sealing to be checked X Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x



Densimeter settings and alarms (in panel) Pn=450 Pa S1=390 PaS2=360 Pa @ 20 ºC x




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Annex C

(Continued)

C.2 Visual inspection, maintenance activities and tests

C.2.1 Visual inspection 6 monthly

• Heater • Counter readings • Oil level in dashpot • Condition of porcelain • Palesit protection • (Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded • Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

C.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 450 Pa @ 20 °C (Pressure concept B) 42.020.020E, Page 4 S1 Non-urgent 390 Pa @ 20 °C Tolerance of ± 40 Pa acceptable S2 Urgent / Lock out 350 Pa @ 20 °C S1 - S2 difference 0,25 to 0,35 shall be maintained

• Any leak shall be reported • Adjust micro-switches if required (only by Specialist or accreditee)

C.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations


Plus

• Timing test (close, open and close trip − all coils). Refer to factory values • Any variance in the timing tests must be investigated fully • Contact Resistance (45 μΩ maximum) • DRM not required



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Annex C

(Continued) • Contact wear measurement if cumulated fault current is reached (20,000 kA2) 13 operations at

full load. Refer to graph (42.020.020E, page 49) and procedure (pages 45 to 47) • Coil resistance (220 V d.c. − 135 Ω/110 V d.c. − 35 Ω) • Minimum operating voltage (actual). 50 % trip /50 % close • Travel curve − It’s nice to have but not a requirement from OEM • Spring rewind time − Compare to the last measurement or factory tests • Dew point − Refer to 42.020.020E, page 31 − Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

C.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations Mechanism

• Major inspection and improvements shall be performed by OEM or OEM accredited personnel. • According to OEM Protocol Q96.0402.E / 05.95 (Inspection)

Q96.0406.E / 02.97 (Improvements)


Poles

• Contact inspection only after reaching the limit of the wear measurement • Nozzle inspection only for capacitor and reactor circuit-breakers, without point-on-wave switching

relay Only after 2500 operations • Nozzle inspection only for capacitor and reactor circuit-breakers, with point-on-wave switching relay

Only after TBA operations • Clean and re-lubricate operating linkages • Replace bottom support insulator seal using silicone M111. (Coastal areas only)

C.3 Spare parts and tools Refer to the OEM’s manual



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Annex C

(Concluded)

GEC Alstom Sprecher HGF 116/2B circuit-breaker fault levels

Busbar kA Fault operations Busbar kA Fault operations

1 2500 31 21

2 2500 32 20

3 2222 33 18

4 1250 34 17

5 800 35 16

6 556 36 15

7 408 37 15

8 313 38 14

9 247 39 13

10 200 40 13

11 165

12 139

13 118

14 102

15 89

16 78

17 69

18 62

19 55

20 50

21 45

22 41

23 38

24 35

25 32

26 30

27 27

28 26

29 24

30 22



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Annex D

Circuit-breaker type: GEC Alstom Sprecher HGF 216/2B

D.1 Procedure for GEC Alstom Sprecher HGF 216/2B circuit-breaker

D.1.1 For fault current assessment criteria

Use graph on page 62 of the OEM’s manual 42.020.021E to determine the amount of fault trips before the contact inspection must be done.



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Annex D (Continued)

GEC Alstom HGF 216/2B circuit-breaker


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Task Contributing factors or reference Maintenance tasks Poles

Contact inspection Only after reaching the limit of wear measurement x x


Clean and re-lubricate operating linkages x xMechanism


Replace closing springs XMeasurements Number of fault operations x Timing test close, open and close-open Refer to factory test values x x

Contact wear measurement Refer to graph 42.020.021E page 65-66 x

Contact resistance test Less than 45 μΩ x xTravel curve x x


Spring rewind time Compare to last measurements x xDew point Refer to 42.020.021E page 47 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x xVisual inspections Heater in tripping spring housing and mechanism x

Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x

Flange corrosion x



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Annex D

(Continued)

GEC Alstom HGF 216/2B circuit-breaker


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Task Contributing factors or reference Check all linkages x Check for corrosion and dust in mechanism x

Door locked and sealing to be checked x Extended checks and inspections Heater in tripping spring housing and mechanism x

Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x



Densimeter settings and alarms (in panel) Pn=500 Pa S1=440 Pa S2=410 Pa @ 20 ºC x


D.2 Visual inspection, maintenance activities and tests

D.2.1 Visual inspection 6 monthly

• Heaters in mechanism and tripping spring housing • Counter readings • Oil level in dashpot



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Annex D

(Continued) • Condition of porcelain • Palesit protection (Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded

D.2.1 Visual inspection (continued)

• Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

D.1.2 Extended checks and inspection 6 years (inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 500 Pa @ 20 °C (Pressure concept B) 42.020.021E, Page 6 S1 Non-urgent 440 Pa @ 20 °C Tolerance of ± 45 Pa acceptable S2 Urgent/lock out 410 Pa @ 20 °C S1 - S2 difference 0,25 to 0,35 shall be maintained

• Any leak shall be reported • Adjust micro-switches if required (only by Specialist or accreditee)

D.1.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations • Visual inspection • Extended checks and inspection

Plus

• Timing test (close, open and close trip − all coils). Refer to factory values • Any variance in the timing tests shall be investigated fully • Contact resistance (45 μΩmaximum) • DRM not required • Contact wear measurement if cumulated fault current is reached (25,000 kA2) 7 operations at full load.

Refer to graph (42.020.021E, page 62 and procedure pages 65 to 66) • Coil resistance (220 V D.C. − 135 Ω/110 V D.C. − 35 Ω) • Minimum operating voltage (actual). 50 % trip/50 % close • Travel curve − It’s nice to have but not a requirement from OEM • Spring rewind time − Compare to the last measurement or factory tests • Dew point − Refer to 42.020.021E, page 47. Limit 300 PPM



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Annex D

(Continued) • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

D.1.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations

Mechanism

• Major inspection and improvements shall be performed by OEM or OEM accredited personnel. • According to OEM Protocol Q96.0402.E / 05.95 (Inspection) Q96.0406.E / 02.97 (Improvements)


Poles

• Contact inspection only after reaching the limit of the wear measurement. • Nozzle inspection only for capacitor and reactor circuit breakers, without point-on-wave switching

relay. Only after 2500 operations. • Nozzle inspection only for capacitor and reactor circuit breakers, with point-on-wave switching relay.

Only after TBA operations. • Clean and re-lubricate operating linkages.

D.3 Spare parts and tools

Refer to the OEM’s manual.



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Annex D

(Concluded)

D.6 GEC Alstom Sprecher HGF 216/2B circuit-breaker fault levels


1 2500 31 26 2 2500 32 24 3 2500 33 23 4 1522 34 22 5 977 35 20 6 679 36 19 7 500 37 18 8 383 38 17 9 303 39 16

10 246 40 16 11 203 41 15 12 171 42 14 13 146 43 13 14 126 44 13 15 110 45 12 16 97 46 12 17 86 47 11 18 76 48 11 19 69 49 10 20 62 50 10 21 56 51 10 22 51 52 9 23 47 53 9 24 43 54 9 25 40 55 8 26 37 56 8 27 34 57 8 28 32 58 7 29 30 59 7 30 28 60 7

61 7 62 7 63 6



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Annex E

Circuit-breaker type: GEC Alsthom Sprecher HGF 112/1C

E.1 Procedure for GEC Alsthom Sprecher HGF 112/1C circuit-breakers

E 1.1 For fault current assessment criteria

Use graph 42.020.011E to determine the amount of fault trips before the contact inspection must be done – page 41).

E.1.2 Special Modification

The arcing shield inside the arcing chamber should be modified on all frequent operating breakers (especially capbanks and rectors circuit breakers). This should be done according to OEM specifications.



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Annex E (Continued)

GEC Alstom HGF 112/1C circuit-breaker


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Replace all arcing contacts Refer to OEM improvements of May 2000 x

Contact inspection Only after reaching the limit of wear xNozzle inspection Only capacitor banks and reactors x xClean and re-lubricate operating linkages x xReplace top cover seal using M111, new washers

Water penetrating through spring washer x

Mechanisms

Major inspection and improvements Refer to OEM protocol Q96.0402.E – Q96.0406.E Maintenance report x x

Replace closing springs xMeasurements Number of fault operations x Timing test close, open and close-open Refer to factory test values x xContact resistance test Less than 45 μΩ x xTravel curve x x


Spring rewind time Compare to last measurements x xDew-point Refer to 42.020.020E page 31 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x x

Visual inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x




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Annex E

(Continued)



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Task Contributing factors or reference Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x



Densimeter settings and alarms (in panel) Pn=4.5 bar S1=4.0 bar S2=3.7bar @ 20 °C x

Adjust Micro-switches if required (Specialist or accreditee) x



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Annex E

(Continued)

E.2 Visual inspection, maintenance activities and tests

E.2.1 Visual inspection (on-line) 6 monthly

• Heater • Counter readings • Oil level in dashpot • Condition of porcelain • Palesit protection • (Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded • Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

E.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 4.5 bar @ 20 °C (Pressure concept B) 42.020.011E, Page 4 S1 Non-urgent 3,9 bar @ 20 °C Tolerance of ± 0.1 bar acceptable S2 Urgent / Lock out 3.6 bar @ 20 °C S1 - S2 Difference of 0,25 to 0,35 must be maintained

• Any leak must be reported.

• Adjust Micro-switches if required (Specialist or accreditee).

E.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 000 operations


Plus

• Timing test (Close, open and close trip − all coils). Refer to factory valve • Any variance in the timing tests must be investigated fully • Contact resistance (35 μΩmaximum) • DRM not required • Contact wear measurement according to manual 42.020.011E page 37-39 15 operations at full load.

Refer to graph (42.020.011E, page 41). • Coil resistance (220 V d.c. − 135 Ω/110 d.c. − 35 Ω).



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Annex E (Continued)

• Minimum operating voltage (actual). 50 % trip/50 % close. • Travel Curve - It’s nice to have but not a requirement from OEM. • Check if screen cap and absorber are modified (if not, do the modification as per OEM requirement)

E.2.3 Condition monitoring test (continued)

• Spring rewind time - Compare to the last measurement or factory tests • Dew point − Refer to 42.020.021E, page 31 Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

E.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations

Mechanism

• Major inspection and improvements to be performed by OEM or OEM Accredited personnel. • According to OEM Protocol Q96.0402.E/05.95 (inspection) Q96.0406.E/02.97 (improvements)


Poles

• Change all arcing contacts after 2000 normal operations • Contact inspection only after reaching the limit of the wear measurement, replace. • Nozzle inspection only for capacitor and reactor breakers (Only after 2000 operations) • Clean and re-lubricate operating linkages • Replace top cover seal using Silicone M111, Loctite 225 and new washers (discard spring washers

completely). E.3 Spare parts and tools




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Annex E

(Concluded)

E.6 GEC Alsthom Sprecher HGF 112/1C fault levels


10 140 11 116 12 97 13 83 14 71 15 62 16 55 17 48 18 43 19 39 20 35 21 32 22 29 23 26 24 24 25 22 26 21 27 19 28 18 29 17 30 16 31 15

31,5 14



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Annex F

Circuit-breaker type: GEC Alsthom Sprecher HGF 114/1A

F.1 Procedure for GEC Alsthom Sprecher HGF 114/1A circuit-breakers

F.1.1 For fault current assessment criteria

Use graph on page 40 of the OEMs manual 42.020.010E to determine the amount of fault trips before the contact inspection must be done.



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Annex F (Continued)

GEC Alstom HGF 114/1A circuit-breaker


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Poles

Contact inspection Only after reaching the limit of wear measurement

Clean and re-lubricate operating linkages x xMechanisms – FKF 1-2


Replace closing springs xMeasurements

Number of fault operations x Timing test close, open and close-open Refer to factory test values x xContact wear measurement Refer to graph 42.020.010E page 31 xContact resistance test less than 45 μΩ x xTravel curve x x


Spring rewind time compare to last measurements x xDew-point Refer to 42.020.020E page 31 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x xVisual inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x





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Annex F

(Continued)

GEC Alstom HGF 114/1A circuit-breaker


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Task Contributing factors or reference Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x


Door locked and sealing to be checked x Densimeter settings and alarms (in panel)

Pn=4,5 bar S1=3,9 bar S2=3,6 bar @ 20 °C x


F.2 Visual inspection, maintenance activities and tests

F.2.1 Visual inspection (on-line) 6 monthly

• Heater • Counter readings • Oil level in dashpot • Condition of porcelain • Palesit protection

(Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded



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Annex F (Continued)

• Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

F.2.2 Extended checks and inspection 6 years inland) 4 years (coastal) • Densimeter settings and alarms (in panel)

Nominal pressure 4,5 bar @ 200C (Pressure concept ) 42.020.010E, Page 4 S1 Non-urgent 3,9 bar @ 20 °C Tolerance of ± 0.1 bar acceptable S2 Urgent / Lock out 3,6 bar @ 20 °C S1 - S2 Difference of 0,25 to 0,35 must be maintained

• Any leak must be reported • Adjust Micro-switches if required (Specialist or accreditee)

F.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations


Plus

• Timing test (Close, open and close trip - all coils). Refer to factory valve • Any variance in the timing tests must be investigated fully • Contact resistance (45 μΩ maximum) • DRM not required • Contact wear measurement if accumulated fault current is reached (20,000 kA2), see procedure page

36-38. 15 operations at full load. Refer to graph (42.020.010E, page 40).

• Coil resistance (220 V d.c. − 135 Ω/110 V d.c. − 35 Ω). • Minimum operating voltage (Actual). 50 % trip/50 % close. • Travel curve − it’s nice to have but not a requirement from OEM. • Spring rewind time − Compare to the last measurement or factory tests • Dew-point − Refer to 42.020.E, page 31 Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)

F.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations Mechanism

• Major inspection and improvements to be performed by OEM or OEM Accredited personnel. • According to OEM Protocol Q96.0400.E 05.95 (inspection) Q96.0401.E/02.97 (improvements)



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Annex F

(Continued)

Closing spring replacement 5000 operations Poles

• Contact inspection only after reaching the limit of the wear measurement • Clean and re-lubricate operating linkages

F.3 spare parts list




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Annex F

(Concluded)

F.5 GEC Alsthom Sprecher HGF 114/1A fault levels


10 140 11 116 12 97 13 83 14 71 15 62 16 55 17 48 18 43 19 39 20 35 21 32 22 29 23 26 24 24 25 22 26 21 27 19 28 18 29 17 30 16 31 15

31,5 14



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Annex G

(Continued)



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Task Contributing factors or reference Visual inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x


Door locked and sealing to be checked x Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x Sf6 pressure reading with ambient temperature x



Densimeter settings and alarms (in panel) Pn=4,5 bar s1=3,9 bar S2=3,6 bar @ 20 °C




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Annex G (Continued)

G.2 Visual inspection, maintenance activities and tests

G.2.1 Visual inspection 6 monthly/yearly • Heater • Counter readings • Oil level in dashpot • Condition of porcelain • Palesit protection • (Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded • Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

G.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal)

• Densimeter settings and alarms (in panel)

Nominal pressure 4,5 bar @ 20 °C (Pressure concept B) 42.020.020E, Page 4 S1 Non-urgent 3,9 bar @ 20 °C Tolerance of ± 0,1 bar acceptable S2 Urgent / Lock out 3,6 bar @ 20 °C S1 - S2 Difference of 0,25 to 0,35 must be maintained

• Any leak must be reported • Adjust micro-switches if required (Specialist or accreditee)

G.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations


Plus

• Timing test (Close, open and close trip - all coils). Refer to factory valve • Any variance in the timing tests must be investigated fully • Contact resistance (45 μΩmaximum) • DRM not required • Contact wear measurement if cumulated fault current is reached (20,000kA2) 13 operations at full

load. Refer to graph (42.020.020E, page 49) and procedure (pages 45 to 47). • Coil resistance (220 V d.c. − 135 Ω/110 V d.c. − 35 Ω). • Minimum operating Voltage (Actual). 50 % trip/50 % close. • Travel curve− it’s nice to have but not a requirement from OEM. • Spring rewind time - Compare to the last measurement or factory tests • Dew-point − Refer to 42.020.020E, page 31 Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)



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Annex G

(Continued)

G.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations Mechanism

• Major inspection and improvements to be performed by OEM or OEM Accredited personnel. • According to OEM Protocol Q96.0402.E/05.95 (inspection) Q96.0406.E/02.97 (improvements)


Poles

• Contact inspection only after reaching the limit of the wear measurement • Nozzle inspection only for capacitor and reactor breakers, without point on wave switching relay Only

after 2500 operations • Nozzle inspection only for capacitor and reactor breakers, with point on wave switching relay Only

after TBA operations • Clean and re-lubricate operating linkages

G.3 Spare parts and tools




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Annex G

(Concluded)

G.5 GEC Alsthom Sprecher HGF 115/2C fault levels

BUSBAR kA FAULT OPERATIONS 1 2500 2 2500 3 1556 4 875 5 560 6 389 7 286 8 219 9 173

10 140 11 116 12 97 13 83 14 71 15 62 16 55 17 48 18 43 19 39 20 35 21 32 22 29 23 26 24 24 25 22 26 21 27 19 28 18 29 17 30 16 31 15

31,5 14



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Annex H Circuit-breaker type: GEC Alsthom Sprecher HGF 116/2B 50 kA

H.1 Procedure for GEC Alsthom Sprecher HGF 116/2B 50 kA circuit-breakers H.1.1 Fault current assessment criteria Use graph 42.020.051E to determine the amount of fault trips before the contact inspection must be done – page 49.



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Task Contributing factors or reference Maintenance tasks Poles

Contact inspection Only after reaching the limit of wear measurement


Nozzle inspection Only capacitor banks and reactors with POW

Clean and re-lubricate operating linkages x xReplace bottom support insulator seal using M111 Coastal areas only x

Mechanisms

Major inspection and improvements Refer to OEM protocol Q96.0402.E − Q96.0406.e maintenance report x x

Replace closing springs xMeasurements Number of fault operations x Timing test close, open and close-open Refer to factory test values x x

Contact wear measurement Reference: to graph 42.020.051E page 45 x

Contact resistance test Less than 45 μΩ x xTravel curve x x


Spring rewind time Compare to last measurements x xDew-point Refer to 42.020.051E page 31 x xSF6 percentage 98 % x xClutch slip length Refer to factory value 30 % x x



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Annex H

(Continued)



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Task Contributing factors or reference Visual inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading at ambient temperature x


Door locked and sealing to be checked x Extended checks and inspections Heater x Loose items in mechanism x Counter readings x Oil level in dashpot x Condition of porcelain x Silicon sealant on cementing of flanges x SF6 pressure reading with ambient temperature x



Densimeter settings and alarms (in panel) Pn=5,5 bar s1=4,9 bar s2=4,6 bar @ 20 °C x




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Annex H (Continued)

H.2 Visual inspection, maintenance activities and tests

H.2.1 Visual inspection 6 monthly • Heater • Counter readings • Oil level in dashpot • Condition of porcelain • Palesit protection

(Silicone sealant on cementing of the flanges) • SF6 pressure reading with ambient temperature recorded • Flange corrosion • Check all linkages • Check loose items in mechanism • Check for corrosion and dust in mechanism • Door locked and sealing to be checked

H.2.2 Extended checks and inspection 6 years (inland) 4 years (coastal)

• Densimeter settings and alarms (in panel) Nominal pressure 5,5 bar @ 20 °C

(Pressure concept D) 42.020.051E, Page 4 S1 Non-urgent 4,9 bar @ 20 °C Tolerance of ± 0,1 bar acceptable S2 Urgent / Lock out 4,6 bar @ 20 °C S1 - S2 Difference of 0,25 to 0,35 must be maintained

• Any leak must be reported • Adjust micro-switches if required (Specialist or accreditee)

H.2.3 Condition monitoring test 15 years (inland) 12 years (coastal) 2 500 operations


Plus

• Timing test (Close, open and close trip - all coils). Refer to factory valve • Any variance in the timing tests must be investigated fully • Contact resistance (45 μΩ maximum) • DRM not required • Contact wear measurement if cumulated fault current is reached (20,000kA2) 8 operations at full load.

Refer to graph (42.020.051E, page 49) and procedure (page 45-47). • Coil resistance (220 V d.c. − 135 Ω/110 V d.c. 35 Ω). • Minimum operating voltage (Actual). 50 % trip/50 % close. • Travel curve− it’s nice to have but not a requirement from OEM. • Spring rewind time − Compare to the last measurement or factory tests • Dew point − Refer to 42.020.051E, page 31 Limit 300 PPM • SF6 percentage − Limit 98 % • Clutch slip length (refer to factory test ± 30 %)



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Annex H

(Continued)

H.2.4 Major inspection (maintenance tasks) 15 years (inland) 12 years (coastal) 2500 operations

Mechanism

• Major inspection and improvements to be performed by OEM or OEM Accredited personnel. • According to OEM Protocol Q96.0402.E 05.95 (inspection)

Q96.0406.E/02.97 (improvements)


Poles

• Contact inspection only after reaching the limit of the wear measurement • Nozzle inspection only for capacitor and reactor breakers, without point on wave switching relay Only

after 2500 operations • Nozzle inspection only for capacitor and reactor breakers, with point on wave switching relay Only

after TBA operations • Clean and re-lubricate operating linkages • Replace bottom support insulator seals using Silicone M111. (Coastal areas only)

H.3 Spare parts and tools




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Annex H (Concluded)

GEC Alsthom Sprecher 116/2B – 50 kA fault levels


1 2500 31 21

2 2500 32 20

3 2222 33 18

4 1250 34 17

5 800 35 16

6 556 36 15

7 408 37 15

8 313 38 14

9 247 39 13

10 200 40 13

11 165 41 12

12 139 42 11

13 118 43 11

14 102 44 10

15 89 45 10

16 78 46 9

17 69 47 9

18 62 48 9

19 55 49 8

20 50 50 8

21 45

22 41

23 38

24 35

25 32

26 30

27 27

28 26

29 24

30 22



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Annex I

Visual inspection check sheet

Description Remarks A Interrupter head • Condition of porcelain • Corrosion on flanges • Silicon sealant on cementing of flanges B Mechanism • Corrosion • Check for foreign objects • Heater condition • Dust in mechanism box • Dust covers/seals • Check counter readings • Trip dashpot oil level • Trip dashpot leakage • Record SF6 gas pressure • Record temperature • Check door lock • Check split pins and circlips on linkages C General • Check split pins • Check circlips

tpc41-63

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Transcript of tpc41-63