Siemens 3AP2-FI Manual

OPERATION & MAINTENANCE
MANUAL FOR
400kV CIRCUIT BREAKER
JINDAL INDIA THERMAL POWER LIMITED
(2 x 600MW THERMAL POWER PROJECT)
DOC. No. - SIEM-JITPL.5404A-EL-3-2112 400kV Circuit Breaker Date 23.06.2011 Page 1 of 109
Project JINDAL INDIA THERMAL POWER LIMITED
(2 x 600 MW THERMAL POWER PROJECT) O&M Consultant TATA CONSULTING ENGINEERS
OPERATION & MAINTENANCE MANUAL FOR 400kV CIRCUIT BREAKER
Owner JINDAL INDIATHERMAL POWER LIMITED
Project 2 x 600 MW THERMAL POWER PROJECT
Consultant TATA CONSULTING ENGINEERS
Document
Type O & M Manual (Information Only) Document Number
Document
Name 400kV Circuit Breaker - Manual SIEM-JITPL.5404A-EL-3-2112
Siemens Limited,
Aurangabad.
Copyright© Siemens Ltd 2007.
The reproduction, transmission or use of this document or its contents is not permitted without express written au-
thority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a
utility model or design, are reserved.

1
s
Operating Instructions
Circuit-Breaker 3AP2 Fl
for rated voltage 420 kV
1003006a
Siemens Ltd.
© Siemens Ltd 2007

2
The Siemens Ltd, Power Transmission and Distribution Group, High Voltage Division has introduced and
appiies a quality system in accordance with EN ISO 9001.
If you require further copies of the operating instructions, please order them from the appropriate Siemens office,
indicating the title and order number:
Published by:
Siemens Ltd.
Power Transmission and Distribution
High Voltage
E-76. Waluj MIDC
Aurangabad 431136
Tel.: [phone]
Fax: [phone]
Subject to change.
All rights, including rights of translation, reproduction by
printing, copying or similar methods, even of parts are
reserved.
Offenders will be liable for damages.

3
1 Contents
1 Contents
2 General 7
2.1 Introduction 7
2.1.1 Arrangement of the Operating Instructions 7
2.1.2 Communication by Means of the Operating Instructions 7
2.2 Safety Instructions 8
3 Description 11
3.1 Technical Data 11
3.1.1 Standards, Regulations 11
3.1.2 Operating Temperatures 11
3.1.3 Insulation Rating 12
3.1.4 Electrical Data 12
3.1.5 Operating Times 13
3.1.6 Arc Quenching Medium SF614
3.1.7 Auxiliary Switch 14
3.1.8 Anti-Condensation Heaters 15
3.1.9 Reference Contact IK-3 15
3.1.10 Further Technical Data 15
3.2 Circuit-Breaker 16
3.3 Pole Column 18
3.4 Interrupter Unit 20
3.5 Arc Quenching 22
3.6 Spring Drive Mechanism of the Circuit- Breaker 24
3.6.1 Charging the Closing Spring 24
3.6.2 Closing 24
3.6.3 Opening 25
3.6.4 Operating Sequence 25
3.7 Function of the Spring Drive Mechanism 26
3.7.1 Charging the Closing Spring 26
3.7.2 Closing 29
3.7.3 Tripping 34
3.8 Control 35
3.8.1 Spring Winding Mechanism 36
3.8.2 Gas Monitoring 36
3.8.3 Lockouts 39
3.8.4 Motor Control 39
3.8.5 Anti-Condensation Heaters 39
3.8.6 Signals 39
3.8.7 Free Auxiliary Switch Contacts 40
3.8.8 Operating Cycle Counter 40
3.9 Reference Contact IK-3 41
3.9.1 Introduction 41

4
1 Contents
4 Installation 43
4.1 Safety Rules for Installation 43
4.2 Delivery and Storage 46
4.2.1 Packing 46
4.2.2 Checking on Arrival 46
4.2.3 Storage 46
4.3 Cleaning Liquids, Lubricants and Corrosion Protection Agents 48
4.3.1 Cleaning Liquids 48
4.3.2 Lubricants and Corrosion Protection Agents 49
4.4 General Instructions for Installation 50
4.5 Installation of the Circuit-Breaker 51
4.5.1 Requirements for Assembly 51
4.5.2 Assembly on Supporting Pillars at the Place of Installation 51
4.5.3 Assembly Overview 52
4.5.4 Disassembling the Insulator Column Kit 52
4.5.5 Assembly of the Control Cubicle 55
4.5.6 Assembly of the Operating Mechanism Cubicles 56
4.5.7 Assembling the Insulator Column 57
4.5.8 Erecting the Double-Break Assembly 62
4.5.9 Lifting Plate 68
4.5.10 Coupling the Operating Mechanism 69
4.5.11 Connecting the Gas Pipes 70
4.6 Earthing and Connecting the Leads 72
4.6.1 Earthing 72
4.6.2 Work on High-Voltage Terminals 72
4.6.3 Connecting the Leads 73
4.7 Filling the Circuit-Breaker with Gas 74
4.7.1 Evacuating 74
4.7.2 Filling the Breaker from the Gas Cylinder 74
4.7.3 Leakage Test after Installation 76
4.8 Carrying Out Test Operations 77
4.9 Checks before Commissioning 79
4.9.1
A
nti-Condensation Heaters 79
4.9.2 Test of Wiring between Substation and Circuit-Breaker 79
4.9.3 Commissioning Report 79
5 Operation 81
5.1 Instructions for Operation 81
5.1.1 Closing and Opening 81
5.1.2 SF6Pressure 81
5.1.3 General Lockout 82

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1211
1 Contents
5.1.4 Mechanical Reclosing Lockout 82
5.1.5 Max. Permissible Number of Interruptions 82
5.1.6 Recommended Procedure in the Event of Irregularities on the Circuit-Breaker
3AP2 Fl
85
5.2 Disposing of High-Voltage Switching Devices and Systems 87
6 Maintenance 89
6.1 Inspection and Maintenance - General 89
6.1.1 Maintenance Services (Schedule) 89
6.1.2 Assignment of Personnel 90
6.1.3 Maintenance Kits 90
6.1.4 Initial Date for Inspection and Maintenance Service 90
6.1.5 Disturbances 91
6.1.6 Points to be Noted 91
6.2 Safety Rules for Inspection and Maintenance Service - General 92
6.3 Maintenance Schedule 96
6.4 Work to be Carried Out in Accordance with the Maintenance Schedule 98
6.4.1 General Inspection 98
6.4.2 Drawing Off the SF6Gas 98
6.4.3 Check of Contact System 99
6.4.4 Evacuating and Filling the Circuit-Breaker with Gas 100
6.4.5 Check Gas Pressure Gauge 103
6.4.6 Testing the Density Monitor 103
6.4.7 Check for Leaks on Operational Circuit- Breaker 104
6.4.8 Checks at Drive Mechanism 105
6.4.9 Terminal Strip 107
6.4.10 Anti-Condensation Heaters 107
6.4.11 Function Checks 107
6.4.12 Check of Motor Control 108
6.4.13 Measuring the SF6Gas Humidity Content 108
6.4.14 Measuring the SF6Air Content 108
6.4.15 Anti-Corrosion Protection 109
6.4.16 Special Occurrences 109
Commissioning Report for the Circuit-Breaker 3AP 111
Function Diagram of Spring Drive Mechanism 119
1 Contents

6
2 General
2 General
2.1 Introduction
These operating instructions apply to high-voltage circuit-breakers with the serial numbers given on the title
page. They are intended to familiarize operating personnel with the design and functioning of the circuit-
breaker. They also supply details of operation and provide information on installation and maintenance.
All values of pressure given are gauge values unless absolute pressure is expressly stated.
It is advisable for the operating personnel to familiarize themselves as early as possible with the instructions,
and with the aid of other documents supplied to gather any relevant further information on the circuit-breaker
and its features.
)Note
The operating instructions contain information on proper operation and maintenance of the
circuit-breaker, together with certain supplementary warning notices. They are intended to
point out impermissible actions and to show the potential danger associated with operation
of the circuit-breaker.
Should further information be desired or should particular problems arise which are not covered
sufficiently in the operating instructions, the matter should be referred to the local Siemens sales
office.
2.1.1 Arrangement of the Operating Instructions
These operating instructions are divided into chapters
1- Contents, 2- General, 3- Description, 4- Installation, 5- Operation and 6- Maintenance.
2.1.2 Communication by Means of the Operating Instructions
In verbal or written communication, as well as when ordering any spare parts required, please use the des-
ignations and part numbers used in the operating instructions, giving details of the order number of the
operating instructions 927 00966 174 A, the page number and specifying the number of the illustration (Fig.).
In this way, misunderstandings can be prevented.

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2 General
2.2 Safety Instructions
During operation, certain parts of the circuit-breaker are live and hazardous voltages therefore present.
Certain parts are also under gas pressure (SF6).
In its pure state, sulphur hexafluoride (SF6) is a colourless, odourless, tasteless, non-toxic and non-flammable
gas, inactive like nitrogen. SF6is safe if there is adequate oxygen present in inhaled air. SF6constitutes no
danger to the ecosystem.
Personnel must be thoroughly familiar with all warnings and procedures for installation, operation,
maintenance and repair contained in these operating instructions.
WARNING
Non-observance of warnings can result in death, severe personal injury and substantial
property and environmental damage.
The user of the circuit-breaker must ensure that the installation, maintenance and relevant operating direc-
tives to the appropriate activity, local safety regulations and information on what to do in the event of an acci-
dent are available or displayed, e.g. on a notice board so that they can be referred to at any time.
Additionally to the safety rules valid in the country in question a few precautionary measures and points to be
noted are listed below:
- The accessory items required for installation, operation and maintenance of the circuit-breaker and for
reasons of safety (protecting clothes, devices for manual operation, warning signs, hand lamps, fire
extinguishers etc.) must be stored neatly at a certain point and be checked regularly for completeness
and proper functioning. This also includes the complete operating instructions.
-The specified maintenance intervals and the instructions for repair and replacement must be adhered to.
-Detailed warning references describing the secure execution of dangerous work are included in the
particular sections of the operating instructions. They are highlighted by frames, bold lettering and/or
other means.
WARNING
in the sense of these operating instructions means that death, severe personal injury or
substantial property and environmental damage may occur if appropriate safety measures
are not taken.
Attention
in the sense of these operating instructions means that light personal injury or
property/environmental damage may occur if appropriate safety measures are not taken.
)Note
Note in the sense of these operating instructions means information to simplify and improve the
handling of the circuit-breaker. They are based on the experiences of Siemens staff.

8
3 Description
3 Description
3.1 Technical Data
The 3AP2 Fl circuit-breaker is of the self-compression type and uses SF6-gas for insulation and arc-quench-
ing purposes. It is of triple-pole outdoor design.
The circuit-breaker is equipped with one operating mechanism per pole and therefore suitable for single and
triple pole auto reclosing.
3.1.1 Standards, Regulations
The circuit-breaker, together with the equipment and special tools supplied, is in conformity with the statutory
laws, rules and standards applying at the time of delivery.
- The specifications in IEC Publications 62271-100.
- The specifications in lEC-Publications 60694.
3.1.2 Operating Temperatures
The circuit-breakers are designed for operation in an ambient temperature range from -25°C to 45°C.

9
3 Description
3.1.3 Insulation Rating
Rated voltage 420 kV
Rated short-duration power-frequency
withstand voltage
to earth 520 kV
across the open circuit-breaker 610 kV
between phases 520 kV
Rated lightning impulse withstand
voltage
to earth 1425 kV
across the open circuit-breaker 1425 kV
between phases 1425 kV
Impulse against power frequency
voltage 1425 kV +240 kV
Rated switching impulse withstand
voltage
to earth 1050 kV
across the open circuit-breaker 1050 kV
between phases 1575 kV
Impulse against power frequency
voltage 900 kV + 345 kV
Flashover distance in air
to earth 3180 mm
across the open circuit-breaker 3200 mm
between phases see dimension drawing
Minimum creepage distance over the
insulators' surfaces
to earth 10050 mm
across the open circuit-breaker 10500 mm
Table 1 Insulation rating
3.1.4 Electrical Data
Rated voltage 420 kV
Rated frequency 50 Hz
Rated normal current 3150 A
Rated short-circuit breaking current 50 kA
Rated line-charging breaking current
(1.4 p.u.) 600 A
Rated cable-charging breaking
current (1.4 p.u.) 400 A
Transient recovery voltage under
terminal fault conditions ace. to IEC
Rated short-circuit making current 135kA
Rated short-circuit duration 3s
Rated operating sequence O-0,3s-CO-3min-CO
Table 2 Electrical data