Siemens 8DJH User manual

Installation and Operating Instructions
Medium-Voltage Switchgear
8DJH
Gas-Insulated, up to 24 kV
siemens.com/8djh
500-8384.9
11
03-2020

2/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Siemens Service Hotline
If you have any technical questions or require additional information, please contact the
Siemens Service Hotline:
▪Customer Support Global
– [phone]
– [email protected]
– 24 hours
▪Customer Support Brazil (for the Brazilian market only)
– [phone]
– [email protected]
– Local working hours
▪Customer Support India (for the Indian market only)
– [phone]
– [email protected]
– Local working hours

Contents
1 About these Instructions .........................6
1.1 Symbols used ..................................................6
1.2 Instruction concept..........................................6
2 Safety instructions....................................8
2.1 General instructions.........................................8
2.2 Due application ...............................................8
2.3 Changes to the product....................................8
2.4 Operator commitment .....................................8
2.5 Qualified personnel .........................................9
2.6 Personal protective equipment (PPE).................9
2.7 IT security .......................................................9
2.8 Hazardous substances......................................9
3 Description .............................................. 10
3.1 Panel types....................................................10
3.2 Panel design..................................................11
3.3 Three-position switch-disconnector.................12
3.4 Vacuum circuit-breaker type 2 ........................13
3.5 Vacuum circuit-breaker type 1.1 .....................13
3.6 Interlocks ......................................................14
3.7 HV HRC fuse assembly....................................15
3.8 Cable connection...........................................16
3.8.1 Cable connection for cable feeders, ring-
main feeders and circuit-breaker feeders .........16
3.8.2 Cable connection for transformer feeders........17
3.8.3 Recommended cable plugs.............................18
3.8.4 Single cable connection with voltage
transformer 4MT8 (interface type C) ...............20
3.8.5 Deep cable compartment cover ......................21
3.9 Pressure relief................................................23
3.10 Protection and control equipment...................24
3.11 Voltage detecting systems..............................24
3.12 Ready-for-service indicator .............................24
3.13 Short-circuit indicators and earth-fault
indicators......................................................25
3.14 Low-voltage compartment (option) ................25
3.15 Accessories ...................................................26
4 Technical data ........................................ 27
4.1 General technical data ...................................27
4.2 Three-position switch-disconnector.................28
4.3 Three-position disconnector ...........................29
4.4 Vacuum circuit-breaker ..................................30
4.5 Current and voltage transformers ...................33
4.6 Classification of the switchgear.......................33
4.7 Standards and guidelines ...............................34
4.8 Dimensions and weights ................................35
4.9 Phase sequence.............................................37
4.10 Insulating gas................................................37
4.11 Dielectric strength and site altitude.................37
4.12 Selection of HV HRC fuse-links ........................38
4.13 Rating plates .................................................46
5 Transport ................................................. 47
5.1 Safety instructions .........................................47
5.2 Transport unit ...............................................47
5.3 Checking the delivery.....................................47
5.4 Unloading and transporting the switchgear .....48
5.5 Unpacking the switchgear for installation........50
6 Storage..................................................... 51
7 Installation .............................................. 53
7.1 Safety instructions .........................................53
7.2 Tools and auxiliary means ..............................53
7.3 Cleaning agents.............................................53
7.4 Mounting paste .............................................54
7.5 Tightening torques ........................................54
7.6 Comments on electromagnetic
compatibility .................................................54
7.7 Preparing the switchgear room.......................55
7.8 Preparing the foundation ...............................56
7.9 Checking service readiness .............................57
7.10 Removing the transport eyes and transport
blocks ...........................................................58
7.11 Installing the pressure relief duct for the
pressure absorber system (IAC up to 16kA).....58
7.12 Installing the base and the pressure relief
duct for the pressure absorber system (IAC
up to 21kA) ..................................................59
7.13 Installing the top pressure absorber unit
(IAC up to 21kA) ...........................................64
7.13.1 Pressure absorber top unit with low-
voltage compartment ....................................64
7.13.2 Mounting the retaining bracket ......................65
7.13.3 Mounting the front covers..............................65
7.13.4 Mounting the lateral parts..............................66
7.13.5 Mounting the absorber collar..........................66
7.14 Fastening the panel to the foundation ............68
7.14.1 Floor openings and fixing points.....................69
7.15 Joining the panels..........................................73
7.15.1 Lining up panels with busbar coupling ............75
7.15.2 Lining up panels without busbar coupling .......79
7.15.3 Bolting panels together..................................80
7.16 Mounting the busbar termination ...................81
7.17 Earthing the switchgear .................................85
7.17.1 Earthing the extendable switchgear ................85
7.17.2 Earthing the non-extendable switchgear .........86
7.18 Interconnecting the earthing busbars..............86
7.19 Installing the low-voltage compartment ..........87
7.20 Installing the metering panel..........................88
7.20.1 Mounting positions for instrument
transformers in the metering panel type M......88
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4/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
7.20.2 Routing of currents and bars in the
metering panel..............................................89
7.20.3 Mounting the instrument transformers ...........89
7.20.4 Connecting the current transformers ..............91
7.20.5 Connecting the voltage transformers ..............92
7.20.6 Connecting high-voltage cables in the
metering panel..............................................95
7.20.7 Mounting the spherical connection bolts.........96
7.20.8 Laying wires of secondary equipment .............97
7.20.9 Mounting earthing accessories in the
metering panel..............................................98
7.20.10 Installing floor plates in metering panels .......100
7.21 Electrical connections ..................................102
7.21.1 Safety instructions .......................................102
7.21.2 Connecting high-voltage cables ....................103
7.21.3 Installing cable plugs type Raychem
RICS5xxx with RDA.......................................104
7.21.4 Mounting the cable-type current
transformers ...............................................106
7.21.5 Cable installation in switchgear with
pressure absorber (IAC up to 16kA and
21kA).........................................................109
7.21.6 Installing ring-core current sensors at the
cable connection .........................................110
7.21.7 Installing voltage sensors .............................112
7.21.8 Mounting voltage transformers 4MT8 at
the cable feeder...........................................113
7.21.9 Removing the voltage transformers from
the busbar...................................................118
7.21.10 Installing voltage transformers at the
busbar ........................................................121
7.21.11 Connecting the secondary equipment ...........124
7.22 Recurring activities ......................................125
7.22.1 Removing and mounting the cable
compartment cover .....................................125
7.22.2 Removing and mounting the cross member...126
7.22.3 Removing and mounting the front cover .......127
8 Commissioning..................................... 129
8.1 Safety instructions .......................................129
8.2 Final checks after installation........................129
8.3 Test operation and mechanical function
test.............................................................130
8.4 Electrical function test..................................130
8.4.1 Changing the setting of the undervoltage
release........................................................130
8.5 Preparing the power-frequency voltage
test.............................................................131
8.6 Instructing the operating personnel ..............131
8.7 Applying operating voltage ..........................131
8.8 After commissioning....................................132
9 Operation .............................................. 133
9.1 Safety instructions .......................................133
9.2 Indicators and control elements....................134
9.2.1 Position indicators .......................................135
9.2.2 Operations counter......................................135
9.2.3 "Fuse tripped" indicator ................................135
9.2.4 "Spring charged" indicator ............................135
9.2.5 Ready-for-service indicator ...........................135
9.2.6 Operating levers ..........................................136
9.2.7 Hand crank..................................................136
9.2.8 Mechanical interlocking with padlock............137
9.2.9 Locking device for pushbutton......................137
9.2.10 Local-remote switch (option)........................137
9.2.11 Momentary-contact rotary control switch
for motor operating mechanism (option) ......138
9.2.12 Key-operated interlock (option) ....................138
9.3 Operating the panel types (overview)............138
9.4 Operating the panel with switch-
disconnector ...............................................139
9.4.1 Switching the three-position switch-
disconnector from OPEN to CLOSED
position ......................................................139
9.4.2 Switching the three-position switch-
disconnector from CLOSED to OPEN
position ......................................................140
9.4.3 Switching the three-position switch-
disconnector from OPEN to EARTHED
position ......................................................141
9.4.4 Switching the three-position switch-
disconnector from EARTHED to OPEN
position ......................................................141
9.5 Operating the panel with switch-fuse
combination................................................142
9.5.1 Switching the three-position switch-
disconnector from OPEN to CLOSED
position ......................................................143
9.5.2 Switching the three-position switch-
disconnector from CLOSED to OPEN
position ......................................................144
9.5.3 Switching the three-position switch-
disconnector from OPEN to EARTHED
position ......................................................144
9.5.4 Switching the three-position switch-
disconnector from EARTHED to OPEN
position ......................................................145
9.5.5 Protection tripping of the switch-fuse
combination................................................145
9.6 Operating the panel with circuit-breaker
type 2 .........................................................146
9.6.1 Charging the spring energy store in circuit-
breaker type 2 manually...............................146
9.6.2 Closing circuit-breaker type 2 .......................147
9.6.3 Opening circuit-breaker type 2......................148
9.6.4 L2: Switching the three-position
disconnector from OPEN to CLOSED
position ......................................................148
9.6.5 L2: Switching the three-position
disconnector from CLOSED to OPEN
position ......................................................149

9.6.6 L2: Switching the three-position
disconnector from OPEN to EARTHED
position ......................................................149
9.6.7 L2: Switching the three-position
disconnector from EARTHED to OPEN
position ......................................................150
9.7 Operating the panel with circuit-breaker
type 1.1 ......................................................150
9.7.1 Charging the spring energy store in circuit-
breaker type 1.1 manually............................151
9.7.2 Closing circuit-breaker type 1.1.....................152
9.7.3 Opening circuit-breaker type 1.1...................152
9.7.4 L1.1: Switching the three-position
disconnector from OPEN to CLOSED
position ......................................................152
9.7.5 L1.1: Switching the three-position
disconnector from CLOSED to OPEN
position ......................................................153
9.7.6 L1.1: Switching the three-position
disconnector from OPEN to EARTHED
position ......................................................154
9.7.7 L1.1: Switching the three-position
disconnector from EARTHED to OPEN
position ......................................................154
9.8 Verification of safe isolation from supply .......155
9.8.1 Voltage indicators........................................155
9.8.2 Integrated voltage detecting systems............157
9.9 Replacing HV HRC fuse-links .........................160
9.10 Cable testing ...............................................163
9.10.1 Cable testing via cable plugs.........................163
9.10.2 Cable sheath test.........................................164
10 Preventive and general
maintenance......................................... 165
11 End of life .............................................. 166
12 Annex..................................................... 167
12.1 MCU (Motor Control Unit) ............................167
12.1.1 Extract from the Technical Description ..........167
12.1.2 Application..................................................167
12.1.3 Design ........................................................167
12.1.4 Fault signals................................................168
12.1.5 Behavior in case of voltage failure.................170
Index ...................................................... 171
5/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH

6/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
1 About these Instructions
For reasons of clarity, these instructions do not purport to cover all details or variations in the
equipment. They do also not provide for every possible contingency to be met in connection
with installation or operation. For details about technical design and equipment like for example
technical data, secondary equipment and circuit diagrams, please refer to the order documents.
The product is subject to continuous technical development within the scope of technical
progress. If not stated otherwise on the individual pages of these instructions, we reserve the
right to modify the specified values and drawings. All dimensions are given in mm. Should
further information be desired or should particular problems arise which are not covered
sufficiently by these instructions, the matter should be referred to the Siemens Service Hotline.
The contents of these instructions shall not become part of or modify any prior or existing
agreement, commitment or relationship. The Sales Contract contains the entire obligations of
Siemens. The warranty contained in the contract between the parties is the sole warranty of
Siemens. Any statements contained herein do not create new warranties or modify the existing
warranty.
The illustrations included in these instructions are simplified and serve to create a general
understanding. The illustrations may therefore deviate from the actual product.
1.1 Symbols used
☒ Precondition symbol: Identifies a necessary precondition for an operation.
1. Numbered operation instruction: Identifies an operation step. Asks the operator to perform
an operation.
✓ Result symbol: Identifies the result of an operation or the intermediate result after an oper-
ation step.
⇨ Measures symbol: Identifies measures to avoid hazards, or important information and facil-
itations of work.
1.2 Instruction concept
These instructions contain information which must be adhered to for personal safety and to
avoid property damage. The signal words “DANGER”, “WARNING”, “CAUTION” and “ATTENTION”
used in these instructions indicate the degree of hazard in descending order that may be
encountered by the user.
DANGER
Indicates a life-endangering situation.
If this hazardous situation is not avoided, death or serious injury will be the consequence.
⇨ Observe measures for the prevention of risks.
WARNING
Indicates a life-endangering situation.
If this hazardous situation is not avoided, death or serious injury can be the consequence.
⇨ Observe measures for the prevention of risks.
CAUTION
Indicates a potentially hazardous situation.
If this hazardous situation is not avoided, light or moderate injury can be the consequence.
⇨ Observe measures for the prevention of risks.

About these Instructions | 1
7/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
NOTICE
Indicates potential property damage.
If this hazardous situation is not avoided, damage to property or environment can be the
consequence.
⇨ Observe measures for the prevention of risks.
INFORMATION
Indicates an important information or facilitation of work.
⇨ Observe the information.

8/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
2 Safety instructions
2.1 General instructions
The switchgear corresponds to the laws, regulations and standards applicable at the time of
delivery. If correctly used, it provides a high degree of safety by means of logical interlocks and
shockproof metal enclosure of live parts, among others.
▪ The personnel must read and understand these instructions before starting to work.
▪ Observe all safety instructions and warnings in these instructions, and follow the
instructions.
▪ Store these instructions carefully, and so that it is accessible to the personnel at any time.
▪ These instructions are a part of the product. When the switchgear is transferred, supply
these instructions as well.
2.2 Due application
The factory-assembled, type-tested and metal-enclosed 8DJH switchgear for indoor installation is
used for power distribution in secondary distribution systems, e.g. in transformer substations,
transfer substations or industrial distribution systems.
The switchgear is designed for application under normal operating conditions according to
IEC62271-1. It can be used under special operating conditions as defined individually between
the operator and the manufacturer of the switchgear.
The rated values for use of the switchgear can be found on the rating plate [▶Page46, "Rating
plates"] and in the technical data [▶Page27, "Technical data"].
2.3 Changes to the product
WARNING
Changes to the product
Modifications or alterations to the product can cause the expiration of warranty claims, and
cause danger to life, limb and other legally protected interests. The fulfillment of the type
tests (according to IEC62271‑200) may not be ensured anymore.
⇨ Coordinate any changes to the product with Siemens.
After coordination with Siemens, please comply with the following points when making changes
to the product:
▪ Use Siemens original parts.
▪ Use qualified personnel.
▪ Install or adjust parts properly.
▪ Perform settings in accordance with Siemens specifications.
▪ After installation and setting, have a final check performed by a service technician approved
by Siemens, including documentation of the test results.
▪ Perform maintenance according to the installation and operating instructions of the product.
2.4 Operator commitment
Regardless of the specifications in these instructions, the operator must know and comply with
local legal regulations for safe transport, storage, installation and operation of the switchgear.
These comprise, for example, laws, ordinances, guidelines and standards for industrial safety,
health protection, and environmental protection.
The switchgear operator must keep the technical documents supplied with the switchgear
throughout the entire service life, and keep them up to date in case of modifications of the
switchgear.

Safety instructions | 2
9/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
2.5 Qualified personnel
Qualified personnel in accordance with these instructions are persons who are familiar with
transport, installation, commissioning, maintenance and operation of the product and have
appropriate qualifications for their work, as e.g.:
▪ Training and instruction or authorization to switch on, switch off, earth and identify power
circuits and equipment / systems as per the relevant safety standards.
▪ Instruction regarding the applicable specifications for the prevention of accidents and the
care and use of appropriate safety equipment.
▪ Training in first aid and behavior in the event of possible accidents.
2.6 Personal protective equipment (PPE)
The personal protective equipment must be determined by the switchgear operator depending
on the work to be performed at the switchgear and on the IAC classification of the switchgear.
To select the personal protective equipment, the local laws and regulations, among others, must
be complied with.
If covers are opened or removed from an operating switchgear, the IAC classification according
to IEC62271 Part200 is no longer fulfilled. The switchgear operator must take this into account
when selecting the personal protective equipment. In case of internal arc, full personal
protection is not provided then, even if the personal protective equipment is worn.
2.7 IT security
The software of Siemens protection devices is regularly checked for safety. If weak points are
identified in the process, which may allow third parties to access protection devices, information
thereto is distributed through the SIPROTEC and SICAM Security Update Report Newsletter.
The Newsletter can be subscribed to at the following website:
www.siemens.com/gridsecurity
Before commissioning the switchgear, it must be verified that the current firmware version is
installed on the protection devices. The latest version of firmware can be obtained from the
following website:
http://w3.siemens.com/smartgrid/global/en/products-systems-solutions/downloads/Pages/
Overview.aspx
For information on updates for other makes of protection devices, please contact the respective
manufacturer.
2.8 Hazardous substances
If hazardous substances are required to perform the work, the relevant safety data sheets and
operating instructions must be observed.

10/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
3 Description
3.1 Panel types
Individual panels
Individual panels allow a free selection when arranging the functions within one switchgear row.
In limited space conditions, individual panels can simplify switchgear installation on site.
Tab.1: Individual panels
Panel type (function) Panel width [mm]
Standard Option
RRing-main panel 310 500 –
KCable panel 310 430 –
K(E) Cable panel with make-proof earthing switch 430 -- --
TTransformer panel 430 – –
LCircuit-breaker panel 430 500 –
SBus sectionalizer panel with three-position switch-disconnector 430 500 620
HBus sectionalizer panel with switch-fuse combination 430 –
VBus sectionalizer panel with circuit-breaker 500 – –
EBusbar earthing panel 310 500
MBilling metering panel 840 – –
M(430) Busbar voltage metering panel with primary fuse protection M(430) 430 – –
M(500) Busbar voltage metering panel with disconnector M(500) 500 – –
Panel blocks
Panel blocks can be operated with up to 4 functions in one common switchgear vessel.
Combinations of transformer feeder and circuit-breaker feeder are possible via panel extensions.
Tab.2: Panel blocks
Block of 2 panels Block of 3 panels Block of 4 panels
Panel types Width [mm] Panel types Width [mm] Panel types Width [mm] Panel types Width [mm]
RR 620 RRR 930 RRRR 1240 RTTT 1600
RK 620 RRT 1050 RRRS 1350 LLLR 1600
KR 620 RTR 1050 RRRT 1360 LLRL 1600
RT 740 RRL 1050 RRRL 1360 RLLL 1600
RL 740 RLR 1050 RRTR 1360 TTTT 1720
KT 740 RRS 1050 RTRR 1360 LLLL 1720
KL 740 RRH 1050 TRRR 1360
TK 740 TRR 1050 RLRR 1360
TR 740 LRR 1050 LRRR 1360
RS 740 RTT 1170 TRRT 1480
RH 740 TRT 1170 LRRL 1480
LK 740 TTR 1170 RTTR 1480
LR 740 RLL 1170 TTRR 1480
K(E)T 860 LLR 1170 RRTT 1480
K(E)L 860 LLL 1290 RLLR 1480
TT 860 TTT 1290 RRLL 1480
LL 860 RLRL 1480

Description | 3
11/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
3.2 Panel design
Examples for panels
Fig.1: Ring-main panel type R Fig.2: Transformer panel type T
Fig.3: Circuit-breaker type L (type 1.1 and type 2)
1
Low-voltage compartment (option)
8
Earthing point
2
Wiring duct (option)
9
Pressure relief device
3
Opening for secondary wires
10
Switchgear vessel
4
Operating mechanism of switching device
11
Control board
5
Bushing for cable plug
12
Bushings for busbar
6
Cable compartment cover
13
Busbar termination cover (option)
7
Earthing busbar
14
HV HRC fuse assembly

3 | Description
12/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
3.3 Three-position switch-disconnector
▪ Three-position switch-disconnector for rated voltages from 7.2 kV to 24kV
▪ Switching functions as switch-disconnector (class E3) according to IEC/EN62271-103 /
VDE0671-103, IEC/EN62271-102 / VDE0671-102 and IEC/EN62271-105 / VDE0671-105
▪ Designed with the functions of a switch-disconnector and a make-proof earthing switch
▪ Switch positions CLOSED, OPEN and EARTHED
▪ With the switch-fuse combination, the HV HRC fuse box can be earthed from both sides
(standard).
Spring-operated mechanism
The spring-operated mechanism is used for the three-position switch-disconnector in ring-main
panels (as ring-main switch).
The switching movements are performed independently of the operating speed.
Spring-operated/stored-energy mechanism
The spring-operated/stored energy mechanism is used for three-position switch-disconnectors in
transformer panels (as transformer switch).
With the operating lever, the closing spring and the opening spring of the operating mechanism
are charged at the same time. After that, the three-position switch-disconnector can be first
closed and then opened with separate pushbuttons.
When a HV HRC fuse-link or the shunt release (f-release) trips, the precharged opening spring is
available for the opening operation; no additional charging process is required. This ensures that
the switch-fuse combination can switch off all appearing faults reliably even when the three-
position switch-disconnector closes.
In order to prevent the operating lever from being left inserted accidentally, the spring-operated/
stored-energy mechanism is equipped with an operating lever ejection system as standard.
Fig.4: Front operating mechanism box of ring-main panel Fig.5: Front operating mechanism box of transformer
panel
1
Ready-for-service indicator
10
"Fuse tripped" indicator
2
ON/OFF momentary-contact rotary control switch for
motor operating mechanism, switch-disconnector (op-
tion)
11
Position indicator
3
Local-remote switch (option)
12
Actuating opening for CLOSING/OPENING
4
ON pushbutton (mechanical operation)
13
OFF pushbutton (mechanical operation)
5
Auxiliary switch (option)
14
Shunt release (f-release, option)
6
Locking device
15
Actuating opening for "spring charging"
7
Motor operating mechanism (option)
16
"Spring charged" indicator
8
Sockets for capacitive voltage detecting system
17
Retainer for short-circuit indicator, earth-fault indicator
or voltage detecting system
9
Actuating opening for EARTHING

Description | 3
13/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
3.4 Vacuum circuit-breaker type 2
The vacuum circuit-breaker consists of a vacuum interrupter unit with integrated three-position
disconnector located in the switchgear vessel, and the associated operating mechanisms. The
vacuum circuit-breaker is a circuit-breaker without automatic reclosing.
▪ Vacuum circuit-breaker for rated voltages from 7.2kV to 24kV
▪ According to IEC/EN 62271-100 / VDE0671-100
▪ Climate-independent vacuum interrupter poles in the gas-filled vessel
▪ Application in hermetically welded switchgear vessel in conformity with the system
▪ Operating mechanism located outside the switchgear vessel in the front operating
mechanism box
▪ Maintenance-free according to IEC/EN 62271-1 / VDE0671-1
Operating function
The closing spring and the opening spring are charged by means of the operating lever supplied,
or by the motor (option), until the latching of the springs is indicated ("spring charged"
indication). Then, the vacuum circuit-breaker can be closed manually or electrically(option).
Fig.6: Front operating mechanism box of circuit-breaker
panel type2
1
Ready-for-service indicator
2
Motor for three-position disconnector (option)
3
Actuating opening for CLOSING/OPENING the three-
position disconnector
4
Three-position switch-disconnector locking device
5
Position indicator for three-position disconnector
6
Actuating opening for three-position disconnector,
EARTHING function
7
Sockets for capacitive voltage detecting system
8
Motor for circuit-breaker (option)
9
Circuit-breaker locking device
10
Position indicator for circuit-breaker
11
OFF pushbutton for circuit-breaker
12
Actuating opening for "spring charging"
13
"Spring charged" indicator
14
ON pushbutton for circuit-breaker
15
Auxiliary switch at the three-position disconnector
(option)
16
Auxiliary switch at the circuit-breaker (option)
3.5 Vacuum circuit-breaker type 1.1
▪ Vacuum circuit-breaker for rated voltages from 7.2kV to 24kV
▪ According to IEC/EN 62271-100 / VDE0671-100
▪ Climate-independent vacuum interrupter poles in the gas-filled vessel
▪ Application in hermetically welded switchgear vessel in conformity with the system
▪ Operating mechanism located outside the switchgear vessel in the front operating
mechanism box
▪ Maintenance-free according to IEC/EN 62271-1 / VDE0671-1
Operating function
The spring energy store is charged by means of the hand crank or by the motor (option), until
the latching of the spring energy store is indicated ("spring charged" indication). Then, the
vacuum circuit-breaker can be closed manually or electrically(option).
In operating mechanisms provided for automatic reclosing (AR), the closing spring can be
charged by hand, or automatically in case of motor operating mechanism. Immediate reclosing
is thus possible.

3 | Description
14/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
The vacuum circuit-breaker consists of a vacuum interrupter unit with integrated three-position
disconnector located in the switchgear vessel, and the associated operating mechanisms.
The vacuum circuit-breaker is a circuit-breaker for automatic reclosing.
Fig.7: Front operating mechanism box of circuit-breaker panel
type1.1
1
Ready-for-service indicator
2
Auxiliary switch at the three-position disconnector
(option)
3
Motor for three-position disconnector (option)
4
Actuating opening for disconnector
5
Position indicator for three-position disconnector
6
Three-position switch-disconnector locking device
7
Actuating opening for earthing switch
8
Sockets for capacitive voltage detecting system
9
Opening spring
10
"Spring charged" indicator
11
Operations counter
12
Position indicator for circuit-breaker
13
OFF pushbutton for circuit-breaker
14
ON pushbutton for circuit-breaker
15
Actuating opening for "spring charging"
16
Closing spring
3.6 Interlocks
Mechanical interlocks
▪Separate actuating openings for DISCONNECTING, EARTHING and spring charging:
Switching straight from CLOSED to EARTHED position and from EARTHED to CLOSED position
is not possible, as the operating lever must be re-inserted in the OPEN position.
The spring in transformer panels and circuit-breaker panels is charged in a separate
actuating opening.
▪Cable compartment interlock:
To remove the cable compartment cover, the feeder must be earthed.
▪Locking device (option):
The locking device (option) of the three-position disconnector / three-position switch-
disconnector can be locked in all three switch positions.
The locking device can be padlocked so that no closing, no opening or no earthing is
possible. The padlock can also be fitted in such a way that none of the three switching
operations can be performed.
In transformer panels and circuit-breaker panels, the actuating opening to charge the spring
can also be locked.
▪Closing lockout (option):
When the cable compartment cover is removed, the three-position disconnector / three-
position switch-disconnector cannot be switched to CLOSED position. Switching from
EARTHED to OPEN position is possible, e.g. to test the cables without removing the cable
plugs.
▪De-earthing lockout (option):
When the cable compartment cover is removed, the three-position disconnector / three-
position switch-disconnector cannot be switched from EARTHED to OPEN position.

Description | 3
15/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
▪Operating lever inserted:
When the operating lever is inserted, the stored-energy mechanism and the circuit-breaker
operating mechanism cannot be activated or deactivated.
▪Interlocking between circuit-breaker and three-position disconnector:
– Circuit-breaker in OPEN position:
The three-position disconnector can be closed and opened. As soon as one of the
actuating openings of the three-position disconnector is opened, the circuit-breaker
cannot be operated anymore.
– Circuit-breaker in CLOSED position:
No switching operations are possible with the three-position disconnector.
Tab.3: Availability of the mechanical interlocks
Mechanical interlock Panel type
R T L K K(E)/E M(430) M(500) M(840) S H V
Separate actuating openings X X X – – X X – X X X
Cable compartment interlock X X X – X X X – X X X
Locking device O X X – O X O – O X X
Closing lockout O – O – – – O – X – O
De-earthing lockout – X O – O X – – – X O
Operating lever inserted – X X – – X – – – X X
Interlocking between circuit-breaker
and three-position disconnector
––X–––––––X
X Standard O Option – Not available
Electrical interlocking
On the customer's request, different electrical interlocks can be installed.
3.7 HV HRC fuse assembly
Features of the HV HRC fuse assembly:
▪ With fuse slide for fuse replacement without tools
▪ HV HRC fuse-links according to DIN 43625 (main dimensions) with striker in "medium"
version according to IEC/EN60282-1
– as short-circuit protection before transformers
– with selectivity to upstream and downstream connected equipment
– 1-pole insulated
▪ Reference dimension e of the fuse-links
– U r = 12kV: e = 292mm (optionally e = 442mm)
– U r = 24kV: e = 442mm
▪ Requirements according to IEC 62271-105 / VDE0671-105 met for HV HRC fuse-links in
combination with the three-position switch-disconnector
▪ Thermal striker tripping when the corresponding HV HRC fuse-link is used
▪ Climate-independent and maintenance-free, with fuse boxes made of cast resin
▪ Arrangement of fuse assembly below the switching-device vessel
▪ Fuse assembly connected to the three-position switch-disconnector via welded-in bushings
and connecting bars
▪ Fuse replacement is only possible when the feeder is earthed
▪ Option for HV HRC fuse-links: "Tripped" indication for remote electrical indication with a
NOcontact

3 | Description
16/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Fig.8: HV HRC fuse assembly
1
Fuse box
2
Fuse slide
3
Tripping pin
4
Sealing cover with seal
5
Cap with control electrode
6
HV HRC fuse-link
7
Cable connection (bushing)
8
Switchgear vessel
9
Fuse bushing
Mode of operation
If a HV HRC fuse-link operates, the switch-disconnector is tripped via an articulation which is
integrated into the cover of the fuse box.
Thermal protection
If the fuse tripping fails, the sudden overpressure trips the switch-disconnector via a diaphragm
and the articulation situated in the cover of the fuse box.
The thermal protection works independently of the type and design of the HV HRC fuse-link
used. The thermal protection is maintenance-free and independent of any outside climatic
effects.
Tab.4: Basic scheme of fuse tripping
HV HRC fuse-link in service condition
Tripping of the three-position switch-disconnector through the striker of
the fuse
Tripping of the three-position switch-disconnector via diaphragm and
striker through overpressure, e.g., if HV HRC fuse-link has been inserted in-
correctly
The HV HRC fuse-links make SIBA [▶Page38, "Selection of HV HRC fuse-links"] release the
striker depending on the temperature and trip the switch-disconnector already in the overload
range of the fuses. Impermissible heating of the fuse box can be avoided in this way.
3.8 Cable connection
3.8.1 Cable connection for cable feeders, ring-main feeders and circuit-breaker
feeders
For the cable connection, customary cable plugs for interface typeCwith bolted contact M16 are
used according to EN50181/DINEN50181.
Available designs:
▪ Screened (conductive) design (standard)
▪ On request: Insulated design, e.g. as adapter for conventional sealing ends or mass-
impregnated cables (restrictions for site altitude and ambient climate)
Recommended cable plugs and possible connection cross-sections, [▶Page18, "Cable plugs for
single cable connection (interface type C)"]. The installation of other makes and types is possible
on request.

Description | 3
17/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
Fig.9: Cable connection for ring-main feeder (example)
Tab.5: Possibilities of connection
Cable Panel width [mm]
310 430 500
Thermoplastic-insulated
single-core cable
1 cable per phase X X X
1 cable per phase with surge limiter or surge arrester O O O
with voltage transformer 4MT8 – – O
2 cables per phase O O O
2 cables per phase with surge limiter or surge arrester O O O
Thermoplastic-insulated
three-core cable
1 cable on request
Paper-insulated mass-im-
pregnated cable
1 cable on request
X Standard O Option
Option
▪ Mounted cable clamps on cable bracket
▪ Deep cable compartment cover
▪ Cable testing, e.g. with measuring bolt, [▶Page163, "Cable testing"]
3.8.2 Cable connection for transformer feeders
For the cable connection, customary cable plugs for interface type A with plug-in contact
(standard), or interface type C with bolted contact M16 (option) are used according to
EN50181/DINEN50181.
Available designs:
▪ Screened (conductive) design (standard)
▪ 1 cable per phase
Recommended cable plugs:
▪ Interface type C [▶Page18, "Cable plugs for single cable connection (interface type C)"].
▪ Interface type A and possible connection cross-sections, [▶Page20, "Cable plugs for single
cable connection (interface type A)"].
The installation of other makes and types is possible on request.
▪Option: Mounted cable clamps on cable bracket

3 | Description
18/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Possible connection options (examples):
Fig.10: Cable feeder downwards with elbow
plugs (interface type A)
Fig.11: Cable feeder downwards with
straight plugs (interface type A)
Fig.12: Cable feeder to the front with elbow
plugs or T-plugs (interface type C)
Fig.13: Cable feeder backwards with elbow
plugs (interface type A)
3.8.3 Recommended cable plugs
Tab.6: Cable plugs for single cable connection (interface type C)
Cable type Cable plugs
Make Type T/W1) ,2) Conductor
cross-section
[mm2]
Design2)
Thermoplastic-insulated cables ≤ 12 kV according to IEC / EN60502-2 / VDE0276-620
1-core or 3-core cable, PE
and XLPE-insulated
N2YSY (Cu) and N2XSY (Cu)
or NA2YSY (Al) and NA2XSY
(Al)
Nexans Euromold 400TB/G, 430TB/G, 480TB/G T 35...300 screened
400LB/G W 35...300 screened
484TB/G T 70...630 screened
440TB/G T 185...630 screened
nkt cables CB 24-630 T 25...300 screened
AB 24-630 T 25...300 insulated
CB 36-630 (1250) T 300...630 screened
Südkabel SET 12 T 50...300 screened
SEHDT 13 T 185...500 screened
Prysmian Kabel und Systeme
(Pirelli Elektrik)
FMCTs-400 T 25...300 screened
3M Deutschland 93-EE 705-6 / -95 T 50...95 screened
93-EE 705-6 / -240 T 95...240 screened
TE Connectivity RICS 51 ... with IXSU3) T 25...300 insulated
RICS 31 ... with IXSU3) T 25...300 insulated
RSTI-39xx T 400...800 screened

Description | 3
19/174500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
Cable type Cable plugs
Make Type T/W1) ,2) Conductor
cross-section
[mm2]
Design2)
Thermoplastic-insulated cable 15 / 17.5 / 24kV according to IEC / EN60502-2 / VDE0276-620
1- or 3-core cable,
PE and XLPE-insulated
N2YSY (Cu) and N2XSY (Cu)
or
NA2YSY(Al) and
NA2XSY(Al)
Nexans Euromold K400TB/G, 430TB/G, 480TB/G T 35...300 screened
K400LB/G W 35...300 screened
484TB/G T 70...630 screened
K440TB/G T 185...630 screened
nkt cables CB 24-630 T 25...300 screened
AB 24-630 T 25...300 insulated
CB 36-630 (1250) T 300...630 screened
Südkabel SET 24 T 50...240 screened
SEHDT 23.1 T 300 screened
SEHDT 23 T 185...630 screened
Prysmian Kabel und Systeme
(Pirelli Elektrik)
FMCTs-400 T 25...240 screened
3M Deutschland 93-EE 705-6 / -95 T 25...95 screened
93-EE 705-6 / -240 T 95...240 screened
TE Connectivity for 1-core ca-
bles RICS 51 ... with IXSU3) T 25...300 insulated
RSTI-58xx T 25...300 screened
RSTI-59xx T 400...800 screened
for 3-core ca-
bles RICS 51 ... with IXSU3) T 25...300 insulated
RSTI-58xx + RSTI-TRFxx T 25...300 screened
Paper-insulated mass-impregnated cables ≤ 12kV according to IEC / EN60055-2 / VDE0276-621
3-core cable, paper-insu-
lated N(A)KLEY, N(A)KBA,
N(A)KBY
TE Connectivity RICS 51... with UHGK / EPKT T 95...300 insulated
3-core cable, paper-insu-
lated N(A)EKBA, N(A)KLEY RICS 51 ... with IDST 513) T 50...300 insulated
Paper-insulated mass-impregnated cables 15 / 17.5 / 24kV according to IEC / EN 60055-2 / VDE0276-621
1-core or 3-core cable, pa-
per-insulated
N(A)EKBA, N(A)KLEY
TE Connectivity RICS 51 ... with IDST 513) T 35...240 insulated
1) T = cable T-plug, W= cable elbow plug
2) Use of current transformers and current sensors in combination with insulated systems is possible on request
3) Discontinued by the manufacturer

3 | Description
20/174 8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Tab.7: Cable plugs for single cable connection (interface type A)
Cable type Cable plugs
Make Type G/W1) Conductor
cross-section
[mm2]
Design
Thermoplastic-insulated cables ≤ 12kV according to IEC/EN60502-2 / VDE0276-620
1-core cable, PE- and XLPE-
insulated N2YSY(Cu) and
N2XSY(Cu)
or
NA2YSY(Al) and
NA2XSY(Al)
Nexans Euromold 158LR W 16...120 screened; with capacitive measuring point
152SR G 95...120 screened; with capacitive measuring point
200LR W 25...95 screened; with capacitive measuring point
K200LR-12 W 25...95 screened
K200SR-12 G 25...95 screened
nkt cables EASW 10 / 250, size
2
W 25...95 screened; option: with metal housing or capacitive
measuring point
EASG 10 / 250, size 2 G 25...95 screened; option: with capacitive measuring point
CE 24 – 250 W 95...120 screened; option: with metal housing or capacitive
measuring point
Südkabel SEHDG 11.1 G 25...120 screened; option: with metal housing
SEW 12 W 25...120 screened; option: with metal housing
Cooper Power Sys-
tems
DE 250 – R-C W 16...120 screened
DS 250 – R-C G 16...120 screened
Prysmian Kabel und
Systeme (Pirelli Elek-
trik)
FMCE-250 W 25...120 screened
3M Deutschland 93-EE 605-2 / -95 W 25...95 screened; option: with metal housing
93-EE 600-2 / xx G 25...150 screened; option: with metal housing
TE Connectivity RSSS 52xx G 25...95 screened; with capacitive measuring point
RSES 52xx-R W 25...120 screened; with capacitive measuring point
Thermoplastic-insulated cables 15 / 17.5 / 24 kV according to IEC / EN60502-2 / VDE0276-620
1-core cable, PE- and XLPE-
insulated N2YSY(Cu) and
N2XSY(Cu)
or
NA2YSY(Al) and
NA2XSY(Al)
Nexans Euromold K158LR W 16...120 screened; with capacitive measuring point
K152SR G 25...120 screened; with capacitive measuring point
200LR W 25...95 screened; with capacitive measuring point
K200LR-16 W 25...95 screened
K200SR-16 G 25...95 screened
nkt cables EASG 20 / 250 G 25...95 screened; option: with metal housing
CE 24 – 250 W 25...95 screened; option: with metal housing or capacitive
measuring point
Südkabel SEHDG 21.1 G 25...70 screened; option: with metal housing
SEW 24 W 25...95 screened; option: with metal housing
Cooper Power Sys-
tems
DE 250 – R-C W 16...120 screened
DS 250 – R-C G 16...120 screened
Prysmian Kabel und
Systeme (Pirelli Elek-
trik)
FMCE-250 W 25...120 screened
3M Deutschland 93-EE 605-2 / -95 W 25...95 screened; option: with metal housing
93-EE 600-2 / xx G 25...150 screened; option: with metal housing
TE Connectivity RSSS 52xx G 16...70 screened; with capacitive measuring point
RSES 52xx-R W 16...120 screened; with capacitive measuring point
1) G = straight cable plug, W = cable elbow plug
3.8.4 Single cable connection with voltage transformer 4MT8 (interface type C)
The voltage transformer 4MT8 can be installed in ring-main feeders and circuit-breaker feeders
with a panel width of 500mm. A deep cable compartment cover is not necessary.
For connection, symmetrical cable T-plugs (see table) are required. Before performing a voltage
test at the cables (on site with max. 80% Ud), the voltage transformers must be removed.