AEG SF6 User manual

Opl rating instructions~lo. 127 B
Type 51-145 Fl/4(131/5R
with spring operating mechanism eRR 5

part A:
part B:
part C:
Erection and commissioning
Inspection, maintenance and reconditioning
General description
The three parts ~re bound separately. Parts A and Bare circuit-
breaker specifi I: whereas part Cis val id for the whole AEG
circuit-breaker ~eneration Sl F (SF6 circuit-breaker with spring
operating mechanism).
The SF6 circuit:breakers type Sl F have been designed for low
ma intenance and long maintenance interv a 1 s. However, adequate
care and adhere1ce to these instructions in this manual will
ensure the reliability of the circuit-breaker.
It is impossibh to consider every eventuality which might occur
during operation of a mechanical device. Therefore, kindly
contact yo~) ~0 al AEG agency in r~se you have any queries which
have not been i'cluded in this manual.
AEG reserves the right to alter these instructions if
necessitated by ongoing development of the breaker.
From the statenltmts, figures and descriptions no claims can be
asserted.
Errors and omis~ions excepted
-.
No part of this manual may be reproduced or copied by any means_
nor transmitted to a third party without the written permission
of AEG.

Par-t
B:
1
2
2.1
2.2
2.3
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.8.1
3.8.2
3.8.3
3.9
3.9.1
3.9.2
3.9.3
3.10
3.10.1
3.10.2
4
4.1
4.2
4.3
4.3 1
4.3,2
4.3,3
Survey of the Inspection-, Maintenance- and Reconditioning Works
Inspection
Maintenance
Reconditioning
Notes for the W:irks to be performed
Safety Precaut i:>ns
Cbeck of the AnI i-Condensation Heating
Functional Chec~-of the Electrical Control Circuits
Measurement of the Operating Times
Check of the SF~ Gas Quality
Measurement of the Resistance of the Main Circuit
Check of the Bolt Connections
Replacement of 1he Arcing Contacts
Preliminary Remr.rks
;--,::-isions
Procedure
Disassembling ol a Complete Pole Column
Preliminary Remr.rks
Provisions
Procedure
Cleaning, Greasing and Lubricating of the Operating Mechanism
Preliminary Remr.rks
Replacement of farts
Lubrication and Greasing
Designation.of .ubricants
Application of ~ubricants
Points of Lubrication
Pole Column
Base Frame
Linkage

5
5.1
5.2
6
6.1
6.2
6.3
I
II
III
Control System
SF6 Gas Supply
Revision Set
Overpressure Safet~' Device
Spare Parts and Accessories
Handling of SF6 Gas
Permissible Number of Short-Circuit Operations
List of Figures and Tables

The maintenance arid reconditioning works recommended include only
those parts that ar'e <:;Ilhjert to wear and tear and aging
The crucial variables influencing the condition of the breaker are:
number of short circuit interruptions
number of switcring operations
time in service
TheAEG maintenance program takes these variables into consideration
by .offering suitable inspection, maintenance and reconditioning
intervals.
Maintenance and reconditioning should be carried out according to
the following guidelines.
When equipment is operated in extreme ambient conditions, it is
advisable to shorten the inspection and maintenance intervals.
Such-conditions are the following:
permanent high ambient temperature
abrasive dust in the atmosphere
high dust content atmosphere
permanent high humidity
corrosive gas or vapors in the atmosphere
Due to the use of highly stable grease resp. dry self-lubricating
friction component~; the spring operating mechanisms do not require
any maintenance unlder normal conditions.
Maintenance and reconditioning should preferably be carried out by-
AEG specialists.
Service personnel (an be thoroughly trained on the job in .courses
offered by AEG.

occasionally visual inspection at
1ate-st after six years.
Regipnpl standards may shorten the
intervals.
after 12 and 24 years
after 2.000 CO-operations at rated
nonnal current or: ¢
after a summarized current
according to appendix II
2.1 Inspection
To be carried by'Erained staff. Adopt the relevant safety
precautions. An openii 19 of the pole columns is not necessary.
Check for corrosiol on
metallic parts ant pipings
- Check the ventilation apertures
- Check of the anti-:ondensation
heating
-•..
at the base frame and at the
cubicle
the SF6 density monitor in
the green range

To be carried out ly trained staff or AEG specialists. Take the
drCldt-breaker out of serv~ce. an nr
1
':,ning of the pole c~::. m:1s i$
not necessary.
fixed inside the operating
mechanism cubic'le
Check of the securing elements
of the linkage
- Functional check of the
electrical control circuits
- Measurement of tile operating
times
chapter 3.5
chapter 3.6- Measurement of t~le res i stance
of the main circllit
2.3 econditioning
To be carried out by trained staff or AEG specialists. Take the
circuit-o-reaker out of service, an opening of the pole columns is-
necessary.

Mandatory:
Isolate the breakel'.
The. position indicctor of th-e closing spring shows "discharged".
Earth both sides of the breaker as specified in the relevant
standards.
Disconnect supply clnd motor voltage. (For the works described in
the chapters 3.2, :1.3,3.4 the voltages are still necessary).
Mind the relevant :;afety regulations.
When opening a po' e column, pump the SF6 gas in a service unit
and evacuate the cl)lumns. Then ventilate the pole columns.
When opening a pole cl)lumn. proceed as follows:
Wear rubber gloves, protective clothing, gas mask and breathing
eouip'11ent during (I )ening and cleaning.
Remove decompos it i on products immediate ly after havi ng opened the
breaker (pole) or Iny subassembly.
Wipe off decompos~tion products with a piece of cloth or use a
vacuum cleaner.
Do not agitate declmposition products unnecessarily.
Neutral'ize deposits (arc products), adsorption filter and used -
cloth with a 3 %;oda solution for 24 hours, or dispose of as
harmful substance~:,.

3.2 Check of the Anti-Condensation Heating
Check the proper function of the anti-condensation heating within
the cubicle (see figure 84).
3.3,' Functi ona1 Check o [ the Electri ca1 Control Circui ts
Perform one CL.05E- and one OPEN-operation.
3.4i Measurement of theJlP.erating Times
Take the operating times on one CLOSE- and one OPEN-operation at
rated supply voltage.
The values have to correspond to those given in the routine test-
cert ificate.
The opening time is the time from energizing the opening release to
contact separation.
The closing time is the time from energizing the closing release to
contact touch.
3.5 Check of the SF6 GIS Quality
Check the gas qual il:ywith respect to the water content, SF6 content
and acidity. Use tre devices mentioned in chapter 6.3, pos. 9, 11
and 18. .
Nominal value (dew point):
Nominal value (SF6 content):
Nominal ·value (acidity):
-10°C at nominal pressure.
> 98 %
~ 10 ppm
Measure at the hv-t:~rminals directly. The values have to correspond
to those given in the routine test-certificate.

Check for the corre:t tightening torque on all accessible bolt
connections.
5 t Y'f.'ngth
I
8.8
.A2-70
A2-80
I
.
grade
I
I I
~ .'---'_.---- --------.,.-··:------1-----------------: --------------.~-~-
Nm ··:tlb
I
Nm ftlb
I
Nm ftlb
I I
I
I
iI
M6 10 7.4
I
10 ).4
I
13.7 10.1
I
I
M8 24.8 :.8.3
I
24.8 18.3
I
33 24.4
I I
MIO 49 ]6 : -""49 36
I
65 48
I
M12 86 li3
I
83
61
I
110 81
I
I
M16 210 :.55
I
202 149
I
270 200
I I
M20 410 ]03
I
394 291
I
525 388
I
I
M24 710 i25
I
377 278
I
I I
Table 84:
Tighteninq torques for bolts and nuts
This chapter descril:es the replacement of the arcing contacts as
required in table 83. Chapter 3.9 describes the disassembling of the
complete pole column.
Replace the arcing CJntacts in closed, dry and undusty rooms only.
Do not replace the I:rcing contacts in the substation in inclement
weather conditions or in windy conditions.
Clean all funct i ona'l elements with a pi ece of cloth that has been
soaked in a 1coho 1. and grease accord ing to the greas i ng
instructi.<:ns. Replac~ parts when necessary.
If bolt connections have been unscrewed during work, replace the
securing elements.