Siemens SENTRON 3KF SITOR User manual

3KF switch disconnectors with fuses

SENTRON
Switch disconnectors
3KF switch disconnectors with
fuses
Manual
09/2019
L1V30580914002A
-01
Introduction
1
General information
2
Product description
3
Product line, product group
4
Function and operation
5
Assembly and mounting
6
Connection and wiring
7
Further accessories
8
Maintenance
9
Technical specifications
10
Dimensional drawings and
drilling templates
11
Appendix
A
ESD guidelines
B
List of abbreviations
C
Conversion tables
D

Siemens AG
Smart Infrastructure
Low Voltage Products
Postfach 10 09 53
93009 REGENSBURG
GERMANY
Document order number: 3ZW1012-0KF33-0AC1
Ⓟ
09/2019 Subject to change
Copyright © Siemens AG 2019.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

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Table of contents
1 Introduction................................................................................................................................................ 7
2 General information ................................................................................................................................... 9
2.1 General information ..................................................................................................................9
3 Product description.................................................................................................................................. 11
3.1 Function, performance features, application areas ................................................................11
4 Product line, product group...................................................................................................................... 13
4.1 3KF switch disconnectors with fuses......................................................................................13
4.1.1 Sizes .......................................................................................................................................14
4.1.2 Installation type.......................................................................................................................16
4.1.3 Connection..............................................................................................................................16
4.1.4 Operating mechanism / handle...............................................................................................18
4.2 Accessories.............................................................................................................................20
4.2.1 Additional poles.......................................................................................................................20
4.2.2 Direct operating mechanism (3KF LV HRC only) ...................................................................21
4.2.3 8UD door-coupling rotary operating mechanism ....................................................................21
4.2.4 Auxiliary switches....................................................................................................................22
4.2.5 Phase barriers.........................................................................................................................24
4.2.6 Cable connection covers (3KF LV HRC only) ........................................................................25
4.3 Exploded views .......................................................................................................................26
4.3.1 Size 1 – 3KF LV HRC .............................................................................................................26
4.3.2 Size 1 – 3KF SITOR................................................................................................................27
4.3.3 Sizes 2 to 5 – 3KF LV HRC ....................................................................................................28
4.3.4 Sizes 2 to 5 – 3KF SITOR.......................................................................................................29
4.4 Article number structure..........................................................................................................30
5 Function and operation ............................................................................................................................ 31
6 Assembly and mounting .......................................................................................................................... 33
6.1 Assembly of parts in the scope of supply ...............................................................................33
6.2 Mounting position....................................................................................................................34
6.3 Floor mounting ........................................................................................................................34
6.3.1 Size 1 ......................................................................................................................................34
6.3.1.1 Size 1 – SITOR with box terminals .........................................................................................34
6.3.1.2 Size 1 – LV HRC with box terminals.......................................................................................35
6.3.1.3 Sizes 1 and 2 with flat terminals at the rear............................................................................36
6.3.1.4 Drilling template size 1 – SITOR.............................................................................................36
6.3.1.5 Drilling template size 1 – flat terminals at the rear..................................................................37
6.3.1.6 Drilling template size 2 – flat terminals at the rear..................................................................38
6.3.1.7 Drilling template size 1 – LV HRC...........................................................................................39

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6.3.2 Sizes 2 to 4 ............................................................................................................................ 40
6.3.2.1 Drilling template for sizes 2 to 5 LV HRC .............................................................................. 41
6.3.2.2 Drilling template for sizes 2 to 5 SITOR................................................................................. 42
6.3.3 Size 5 ..................................................................................................................................... 43
6.4 Standard rail mounting size 1 ................................................................................................ 44
6.4.1 Installation – front operating mechanism and lateral operating mechanism on the right....... 44
6.4.2 Deinstallation – front operating mechanism and lateral operating mechanism on the
right ........................................................................................................................................ 44
6.4.3 Installation – lateral operating mechanism on the left............................................................ 45
6.4.4 Deinstallation – lateral operating mechanism on the left ....................................................... 45
7 Connection and wiring ............................................................................................................................. 47
7.1 Main circuit connection .......................................................................................................... 47
7.1.1 Approved circuit diagrams ..................................................................................................... 47
7.1.2 Box terminals ......................................................................................................................... 49
7.1.3 Flat terminals.......................................................................................................................... 51
7.1.4 Connection accessories......................................................................................................... 52
7.1.4.1 Phase barriers........................................................................................................................ 52
7.1.4.2 Cable connection covers (3KF LV HRC only)........................................................................ 56
7.2 Auxiliary circuit connection..................................................................................................... 57
7.2.1 Auxiliary switches................................................................................................................... 57
7.2.2 Auxiliary switches for size 1 ................................................................................................... 57
7.2.3 Auxiliary switch for sizes 2 to 5 .............................................................................................. 58
7.3 Contact numbers.................................................................................................................... 58
7.3.1 Main circuit ............................................................................................................................. 59
7.3.2 Auxiliary switches................................................................................................................... 59
8 Further accessories ................................................................................................................................. 63
8.1 Auxiliary switches................................................................................................................... 63
8.1.1 Mounting auxiliary switches ................................................................................................... 66
8.1.1.1 Size 1 ..................................................................................................................................... 66
8.1.1.2 Sizes 2 to 5 ............................................................................................................................ 67
8.1.2 Availability of the test function................................................................................................ 69
8.2 Additional poles...................................................................................................................... 69
8.2.1 Versions of available poles .................................................................................................... 69
8.2.2 Possible mounting positions for additional poles and auxiliary switch modules.................... 71
8.2.2.1 Size 1 ..................................................................................................................................... 71
8.2.2.2 Sizes 3, 4 and 5 ..................................................................................................................... 74
8.2.3 Mounting additional poles ...................................................................................................... 76
8.2.4 Removing the jumper at N terminal ....................................................................................... 80
8.2.4.1 Removing the jumper............................................................................................................. 80
8.2.4.2 Reattaching the jumper.......................................................................................................... 81
8.3 Direct operating mechanism .................................................................................................. 82
8.3.1 Versions ................................................................................................................................. 82
8.3.2 Interlocking............................................................................................................................. 83

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8.4 8UD door-coupling rotary operating mechanism ....................................................................83
8.4.1 Component overview ..............................................................................................................85
8.4.2 Types of delivery and versions ...............................................................................................86
8.4.3 Mounting .................................................................................................................................86
8.4.3.1 Mounting the handle on the door............................................................................................88
8.4.3.2 Calculating the length of the shaft/cutting the shaft................................................................89
8.4.4 Functions and operation .........................................................................................................94
8.4.4.1 Door interlocking.....................................................................................................................94
8.4.4.2 Overriding door interlocking....................................................................................................95
8.4.4.3 Deactivating door interlocking.................................................................................................96
8.4.4.4 Interlocking..............................................................................................................................98
8.4.4.5 Enabling interlocking in the ON position.................................................................................98
8.4.4.6 Test function for auxiliary switches .......................................................................................100
8.4.4.7 Assign a switch position between the 8UD handle and the 3KF ..........................................101
8.4.5 Accessories for 8UD .............................................................................................................103
8.4.5.1 Shaft coupling .......................................................................................................................103
8.4.5.2 Shaft jack for sizes 1 and 2...................................................................................................104
8.4.5.3 Inscription label.....................................................................................................................105
9 Maintenance .......................................................................................................................................... 107
10 Technical specifications......................................................................................................................... 109
10.1 Technical specifications – accessories .................................................................................111
11 Dimensional drawings and drilling templates ......................................................................................... 115
11.1 Distance from grounded parts and between two 3KFs.........................................................115
11.2 Drilling templates ..................................................................................................................116
11.2.1 Drilling templates for 8UD door-coupling rotary operating mechanisms ..............................120
11.3 Dimensional drawings...........................................................................................................121
11.3.1 Basic units.............................................................................................................................121
11.3.2 4th pole, N terminal, N/PE terminal ......................................................................................126
11.3.3 Auxiliary switch module ........................................................................................................127
11.3.4 Phase barriers.......................................................................................................................127
11.3.5 Cable connection cover ........................................................................................................129
11.3.6 Direct operating mechanism .................................................................................................130
11.3.7 8UD door-coupling rotary operating mechanism..................................................................135
A Appendix................................................................................................................................................ 137
A.1 Standards and approvals......................................................................................................137
B ESD guidelines ...................................................................................................................................... 139
B.1 Electrostatic sensitive devices (ESD) ...................................................................................139
C List of abbreviations............................................................................................................................... 141
D Conversion tables.................................................................................................................................. 143
Glossary ................................................................................................................................................ 147
Index...................................................................................................................................................... 151

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Introduction
1
Purpose of this manual
In this manual, the basic functions of switching devices of the "3KF switch disconnectors with
fuses" series are described.
The manual contains information on:
●Selection
●Configuration
●Commissioning
Target group
Planners, installation personnel, configuring engineers
Required basic knowledge
To understand this manual, you will need to have a general knowledge of low-voltage
controls and power distribution.
Symbols used
The following table explains the meaning of the various symbols used in this document:
Symbol
Meaning
Symbol
Meaning
Diagonal cutter File
Allen key Touch operation
Phillips screwdriver PZ Lock
Hexagonal socket wrench Click to snap
Graver
Solid conductor

Introduction
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Symbol
Meaning
Symbol
Meaning
Phillips screwdriver PH
Stranded conductor
Slotted screwdriver
Finely stranded conductor with end
sleeves
Trash bin Busbar
Cut off in the trash bin Strip busbar
OK Strip solid conductor
Not OK Strip solid conductor with end
sleeves
Measure Strip solid conductor with end
sleeves without insulating collar
Handsaw

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General information
2
2.1 General information
Definitions of switch disconnectors with fuses
3KF SITOR is a variation of the proven 3KF LV HRC, provides optimized heat dissipation
and permits the use of fuses with substantially higher power losses. In this way, fuses for
semiconductor protection can be loaded with higher currents than conventional switch
disconnectors with fuses.
3KF switch disconnectors with fuses protect against overload and short circuits in low-
voltage circuits as main switches, EMERGENCY STOP switches or maintenance switches of
switchboard assemblies, power distribution boards, power supply and motor outgoing
feeders. Available in 5 sizes, they enable a rated current of between 32 and 800 A to be
connected or interrupted. The modular design of the devices means auxiliary switches and
additional poles can be retrofitted at any time.
For standards, directives, certifications and environmental compatibility, please see
appendix.
Safety note
DANGER
Dangerous voltage. Will cause death or life-threatening injuries.
Turn off and lock out all power supplying this device before working on it.

General information
2.1 General information
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10 Manual, 09/2019, L1V30580914002A-01
NOTICE
Qualified personnel
Installation and maintenance must be carried out by qualified personnel.

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Product description
3
3.1 Function, performance features, application areas
Function
The 3KF switch disconnector is used to close, open, and protect rated currents from 32 A to
800 A.
Performance features
●3-pole and 4-pole versions for AC and DC applications
●5 frame sizes from 32 A to 800 A (3KF SITOR to 850 A)
●Modular retrofitting of additional poles (4th contact element, N or N/PE pole)
●Different operator control designs
●Manual operation from the side or front
●Locking function for handle
●Floor mounting or mounting on standard rail
Applications
The 3KF switch disconnector with fuses is suitable for the following industries:
●Process and basic industries
●Manufacturing industry
●Infrastructure (building installations, supply and disposal)
●Mining
●Machine control
●Wind farms
●...
Installation locations
The products of the 3KF series are mainly used in the following locations:
●Distribution boards with standard system dimensions
●Control cabinets
●Mounting plates (free assembly)

Product description
3.1 Function, performance features, application areas
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Product line, product group
4
4.1 3KF switch disconnectors with fuses
①
3KF SITOR
②
3KF LV HRC
Size
1
2
3
4
5
Rated current In (A)
32 ... 80
125 ... 160
250
400
630 ... 8001)
Number of poles
3
✓
✓
✓
✓
✓
4 (LC HRC only)
✓
✓
✓
✓
✓
Operating mechanism
Front operating mechanism
✓
✓
✓
✓
✓
Direct operating mechanism
(LV HRC only)
✓✓✓✓✓
Lateral operating mechanism
(LV HRC only)
✓✓✓✓✓
Installation type
Floor mounting
✓
✓
✓
✓
✓
Standard rail mounting
✓
x
x
x
x
Connections
Flat terminals
x
✓
✓
✓
✓
Box terminals
✓
x
x
x
x
Flat terminals at rear
(LV HRC only)
✓✓x x x
1) 3KF SITOR 630 ... 850 A

Product line, product group
4.1 3KF switch disconnectors with fuses
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4.1.1 Sizes
3KF switch disconnectors with fuses are available in the following sizes:
●Size 1: 32 – 63 – 80 A
●Size 2: 125 – 160 A
●Size 3: 250 A
●Size 4: 400 A
●Size 5: 630 - 800 A (3KF SITOR to 850 A)
Overview of sizes
Size 1
①
3KF SITOR with box terminals
②
3KF LV HRC with box terminals
③
3KF LV HRC with rear flat terminals
Size 2
①
3KF SITOR with box terminals
②
3KF LV HRC with box terminals
③
3KF LV HRC with rear flat terminals

Product line, product group
4.1 3KF switch disconnectors with fuses
3KF switch disconnectors with fuses
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Size 3
①
3KF SITOR with flat terminals
②
3KF LV HRC with flat terminals
Size 4
①
3KF SITOR with flat terminals
②
3KF LV HRC with flat terminals
Size 5
①
3KF SITOR with flat terminals
②
3KF LV HRC with flat terminals

Product line, product group
4.1 3KF switch disconnectors with fuses
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4.1.2 Installation type
Installation type
Size
Floor mounting
1, 2, 3, 4, 5
Standard rail mounting
1
4.1.3 Connection
Connection types
Connections
Size
Flat terminals
2nd 3, 4, 5
Box terminals 1
Flat terminals at rear
1, 2
Size 1 is available with box terminals for connecting stripped wires.

Product line, product group
4.1 3KF switch disconnectors with fuses
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Sizes 2, 3, 4 and 5 are available with flat terminals for connection of cable lugs or busbars.
①
Box terminals
②
Flat terminals
③
Flat terminals at rear

Product line, product group
4.1 3KF switch disconnectors with fuses
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18 Manual, 09/2019, L1V30580914002A-01
4.1.4 Operating mechanism / handle
All sizes of the 3KF LV HRC are available for manual operation from the front or side only.
Note
Figures
The figures show the 3KD switch disconnector. The mounting principles are identical to the
3KF switch
disconnector.
All sizes of the 3KF SITOR are available for manual operation from the front only. Direct
operation is not possible here.