Medium-Voltage
Switchgear
Fixed-Mounted Circuit-Breaker
Switchgear Type NXPLUS
up to 40.5 kV, SF6-Insulated
Catalog HA 35.51
2003
Supersedes:
Catalog HA 35.51 · 2001
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Contents
Application
Page
NXPLUS fixed-mounted circuit-breaker switchgear
Application
Types, typical uses
Types
2 to 4
is a three-pole, metal-enclosed, metal-clad, SF6-insulated switchgear
for indoor installation in single-busbar and double-busbar design.
Requirements
4 and 5
Electrical data, dimensions
Room planning
R-HA35-085b eps
Technical Data
6
7
R-HA35-086b eps
Features, safety, technology
Product Range
Single-busbar panels
Double-busbar panels
8 and 9
10 and 11
Design
Single-busbar panel design
Double-busbar panel design
12 and 13
14 and 15
Components
Panel interconnection, module coupling
Switching devices
Protection, control, indicating
and measuring equipment
Mechanical control board
Instrument transformers
Panel connection
16
17
18 and 19
20
21
22 and 23
Standards
Standards, specifications, guidelines
24 to 26
Notes
27
Single-busbar
panel
Features
• Environmental independence
thanks to welded stainlesssteel switchgear vessel
without seals
• Compact design thanks to
SF6-insulation
• Maintenance-free design
thanks to
– Hermetically welded
switchgear vessel
– Maintenance-free switching
devices
© Siemens AG 2003
2
Siemens HA 35.51 · 2003
• Innovations thanks to
– Numerical substation control
and protection systems
– Combined protection and
control systems
Double-busbar
panel
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Application
Typical uses
Application
Public power supply system
R-HA35-090 eps
R-HA35-091 eps
R-HA35-093a eps
Application
Offshore wind generators
(photo: Vestas Denmark)
R-HA35-092 eps
NXPLUS switchgear
with maximum equipment
Application Steelworks
Siemens HA 35.51 · 2003
3
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Application
Requirements
Typical uses
Features
Fixed-mounted circuit-breaker switchgear
NXPLUS is used in transformer
and switching substations, e. g. in:
Environmental independence
Innovations
Welded switchgear vessels
made of stainless steel without
seals and enclosed cable plugs
make NXPLUS switchgear
The use of numerical
substation control and
protection systems and
combined protection and
control devices ensure
■ Power supply companies
■ Power stations
■ Cement industry
■ Automobile industry
■ Iron and steelworks
■ Rolling mills
■ Mining industry
■ Textile, paper and food industries
■ Chemical industry
■ Petroleum industry
■ Pipeline installations
■ Offshore installations
■ Electrochemical plants
■ Petrochemical plants
■ Shipbuilding industry
■ Diesel power plants
■ Emergency power supply installations
■ Lignite open-cast mines
■ Traction power supply systems
• Insensitive to aggressive am-
bient conditions such as salt
water, humidity, dust and
temperature
• Hermetically tight to ingress
of foreign bodies such as dust
and dirt
• Independent of site altitude
Compact design
Thanks to the SF6-insulation,
compact dimensions are
possible up to 40.5 kV.
Thus,
• Existing switchgear rooms
can be used effectively
• Reduced costs for new
constructions
• Expensive city-area space is
saved
Maintenance-free design
Switchgear vessels designed
as sealed pressure systems,
maintenance-free switching
devices and enclosed cable
plugs ensure
• Maximized power supply
reliability
• Personal safety
• Sealed-for-life design
according to IEC 60 298
• Installation, operation,
extension and replacement
without SF6-gas work
• Reduced operating costs
• Cost-efficient investment
• No maintenance cycles
• Reduced overall LCC
(Life-Cycle Cost)
4
Siemens HA 35.51 · 2003
• Clear integration in pro-
cess control systems
• Flexible and highly sim-
plified adaptation to new
system conditions and
thus to cost-efficient
operation
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Requirements
Safety
Technology
Personal safety
Operating safety
General
Modular design
• Safe-to-touch and hermeti-
• Hermetically sealed primary
• Three-pole enclosure of the
• Circuit-breaker module
cally sealed primary enclosure
• All high-voltage parts includ-
ing the cable terminations,
busbars and voltage transformers are surrounded by
earthed layers or metal enclosures
• Capacitive voltage detection
system for verification of safe
isolation from supply
• Operating mechanisms and
auxiliary switches safely accessible outside the primary
enclosure (switchgear vessel)
• Protective system interlock to
prevent operation when the
switchgear enclosure is open
• Standard degree of protec-
tion IP 65 (primary part)
and IP 3XD (secondary part)
according to IEC 60 529 /
VDE 0470 Part 1
• High resistance to internal
arcs by logical mechanical
interlocks and tested switchgear enclosure
• Arc-fault-tested panels
according to IEC 60 298 /
VDE 0670 Part 6
• Logical mechanical and / or
electrical interlocks prevent
maloperation
enclosure independent of
environmental effects
(dirt, moisture and small
animals)
• Maintenance-free in an
indoor environment
(IEC 60 694 / VDE 0670
Part 1000)
• Operating mechanisms of
switching devices accessible outside the switchgear
vessel (primary enclosure)
• Metal-enclosed, plug-in in-
ductive voltage transformers mounted outside the
gas compartments
primary part consisting of a
switchgear vessel made of
stainless steel
• Insulating gas SF6
• Three-position switch as
• Low-voltage compartment
• Make-proof earthing by
Instrument transformers
busbar disconnector and
feeder earthing switch
means of the vacuum circuitbreaker
• Outgoing and incoming
feeder panel width: 600 mm
• Hermetically welded switch-
gear vessel made of stainless
steel without seals
• Ring-core current trans-
• Single-pole, solid-insulated,
• Complete logical mechani-
• Cable connection with inside
formers mounted outside
the gas compartments
cal interlocking system
• Welded switchgear vessels,
sealed for life
• Minimum fire load
• Type and routine-tested
• Standardized, NC produc-
tion processes
• Quality assurance
in accordance with
DIN EN ISO 9001
• More than 300,000
switchgear panels of
Siemens in operation
worldwide for many years
• Successfully tested for use
replacement possible
without SF6-gas work and
without interrupting
busbar operation
screened, bolted-type
module coupling
or outside cone plug-in
systems or connection of
solid-insulated bars
• Wall-standing or free-
standing arrangement
• Cable connection access from
front or rear
• Doors left or right-hinged
• Existing switchgear extend-
able on both sides without
modification of panels
• Internal panel control cables
laid in metallic cable ducts
can be removed without
interrupting the bus wires
• Can be removed without
altering the positions of the
busbar and circuit-breaker
modules (outside the gas
compartments)
Vacuum circuit-breaker
• Maintenance-free under
normal ambient conditions
according to IEC 60 694 /
VDE 0670 Part 1000
• No relubrication or
readjustment
• Up to 10,000 operating
cycles
• Vacuum-tight for life
Interlocks
• According to IEC 60 298 /
VDE 0670 Part 6
• Electrical interlocks since
all mechanisms are motor
operating mechanisms
• Manual emergency operat-
ing mechanisms with
enabling key S1
down to –20 °C
• Option: Aseismic design
Siemens HA 35.51 · 2003
5
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Technical Data
Electrical data
Dimensions in mm
Rated values
Single-busbar panels
60
Single-busbar panels
12
24
36
40.5
1
50 Hz 1)
Rated
frequency
kV 20
28
50
Rated lightning impulse
withstand voltage
kV 60
75
125 170 185
max. 31.5 kA
Rated short-time
withstand current, 3 s
max. 31.5 kA
Rated short-circuit
making current
max. 80 kA
Rated peak
withstand current
280
350
85
HA35-2427c eps
Rated short-circuit
breaking current
70
2
1515
Rated short-duration powerfrequency withstand voltage
280
NX PLUS
935
max. kV 7.2
395
2450
Rated
voltage
1145
80
B1
1600
1 End wall
max. 80 kA
Rated normal
current of busbar
max. A 2000 2000 2000 2000 2000
2)
2)
2)
2)
Rated normal
current of feeders
max. A 2000 2000 2000 2000 2000
2)
2)
2)
2)
2 Busbars
Panel width B1
Circuit-breaker panel
Disconnector panel
Bus sectionalizer panel
600 mm
600 mm
900 mm
Double-busbar panels
60
Double-busbar panels
max. kV 7.2
12
24
36
50 Hz 1)
1
kV 20
28
50
Rated lightning impulse
withstand voltage
kV 60
75
125 170
max. 31.5 kA
Rated short-time
withstand current, 3 s
max. 31.5 kA
Rated short-circuit
making current
max. 80 kA
Rated peak
withstand current
max. 80 kA
230
350
70
1515
Rated short-circuit
breaking current
230
2600
Rated short-duration powerfrequency withstand voltage
2
935
230
NX PLUS
Rated
frequency
Rated normal
current of busbar
max. A 2500 2500 2500 2500
Rated normal
current of feeders
max. A 2500 2500 2500 2500
1) 60 Hz on request
2) 2500 A on request
6
395
Siemens HA 35.51 · 2003
HA35-2428b eps
Rated
voltage
1385
80
B2
1840
1 End wall
Panel width B2
Circuit-breaker panel 3)
Bus coupler panel 3)
Bus sectionalizer panel,
system 1 or system 2 4)
Metering panel
3) 1200 mm for 2300 / 2500 A
4) 900 mm or 1200 mm for 2300 / 2500 A
2 Busbars
600 mm
600 mm
600 mm
300 mm
aa
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Technical Data
Room planning
³50
80
³50***
80
³500**
³50***
80
³500**
80
B1
B1
Face-to-face arrangement (top view)
for single-busbar switchgear
See table on page 6 for dimension B1
1600
³1600*
HA35-2408a eps
Single-row arrangement (top view)
for single-busbar switchgear
B1
1600
80
³500**
B1
³50
80
³50***
B1
1600
B1
³1600*
HA35-2407a eps
aa
³50
Room planning for single-busbar switchgear
See table on page 6 for dimension B2
80
³500**
³50***
80
³500**
80
B2
Face-to-face arrangement (top view)
for double-busbar switchgear
B2
1840
³250
80
³50***
³1600*
B2
1840
B2
³250
Single-row arrangement (top view)
for double-busbar switchgear
80
³500**
HA35-2410a eps
³250
80
³50***
B2
1840
B2
³1600*
HA35-2409a eps
Room planning for double-busbar switchgear
* Aisle width
** Free space next to last installed panel,
either on left or right of switchgear row
*** Recommended: W 500 mm
Siemens HA 35.51 · 2003
7
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Product Range
Single-busbar panels
Circuit-breaker panel
• With cable connection as
Circuit-breaker panel (cable connection as inside cone)
inside cone for
– Rated voltage up to 40.5 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal currents
of busbars and feeders
up to 2000 A
(2500 A on request)
Busbar components
Components
before circuit-breaker module
Components
after circuit-breaker module 3)
1)
• With cable connection as
Panel connection
versions
outside cone for
– Rated voltage up to 24 kV
– Rated short-circuit breaking
current up to 25 kA
(up to 12 kV: 31.5 kA)
– Rated normal currents of
busbars up to 2000 A
(2500 A on request) and
feeders up to 1250 A
Capacitive
voltage
detection
system
Disconnector panel
outside cone for
– Rated voltage up to 24 kV
– Rated short-circuit breaking
current up to 25 kA
(up to 12 kV: 31.5 kA)
– Rated normal currents of
busbars up to 2000 A
(2500 A on request) and
feeders up to 1250 A
HA35-2386b eps
• With cable connection as
1 x plug-in
cable,
interface
type 2 or 3
or
1 x plug-in
cable,
interface
type 2
or
2 x plug-in
cable,
interface
type 2 or 3
or
Voltage
transformer,
plug-in type
or
3 x plug-in
cable,
interface
type 2 or 3
or
Surge
arrester,
plug-in type
or
4 x plug-in
cable,
interface
type 2
and
2)
Busbar
current
transformer
or
Solidinsulated bar
• With cable connection as
inside cone for
– Rated voltage up to 40.5 kV
– Rated short-time withstand
current up to 31.5 kA
– Rated normal currents
of busbars and feeders
up to 2000 A
(2500 A on request)
Surge
arrester,
plug-in type
Busbar components
Components
before circuit-breaker module
Components
after circuit-breaker module
for
– Rated voltage up to 40.5 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal current
of busbars up to 2000 A
(2500 A on request)
1)
Panel connection
components
Panel connection
versions
Capacitive
voltage
detection
system
HA35-2387b eps
Siemens HA 35.51 · 2003
Current
transformer
Voltage
transformer,
plug-in type
Circuit-breaker panel (cable connection as outside cone)
Bus sectionalizer
8
Panel connection
components
3 x plug-in
cable
or
1 x plug-in
cable,
interface
type 2
or
2 x plug-in
cable
or
Voltage
transformer,
plug-in type
or
1 x plug-in
cable
or
Surge
arrester,
plug-in type
and
2)
Busbar
current
transformer
Voltage
transformer,
disconnectable
Current
transformer
Surge arrester
or limiter,
to be plugged in
additionally
1) Capacitive
voltage
detection
system
2) Not possible
with busbar
voltage
transformer
3) Requires cable
connection with
vessel for separate
inside cone
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Product Range
Single-busbar panels
Disconnector panel (cable connection as inside cone)
Bus sectionalizer
Busbar
components
Busbar components
Components
before circuitbreaker module
Components
before bus riser module
Panel connection
components
1)
HA35-2388b eps
Capacitive
voltage
detection
system
1 x plug-in
cable,
interface
type 2 or 3
or
1 x plug-in
cable,
interface
type 2
or
2 x plug-in
cable,
interface
type 2 or 3
or
Voltage
transformer,
plug-in type
or
3 x plug-in
cable,
interface
type 2 or 3
or
Surge
arrester,
plug-in type
or
4 x plug-in
cable,
interface
type 2
and
2)
Busbar
current
transformer
or
Solidinsulated bar
Voltage
transformer,
plug-in type
Current
transformer
HA35-2390b eps
Panel connection
versions
Capacitive
voltage
detection
system
Current
transformer
Surge
arrester,
plug-in type
Disconnector panel (cable connection as outside cone)
Busbar components
Components
before cable connection module
Components
after bus riser module
1)
Panel connection
components
Panel connection
versions
3 x plug-in
cable
HA35-2389c eps
Capacitive
voltage
detection
system
or
1 x plug-in
cable,
interface
type 2
or
2 x plug-in
cable
or
Voltage
transformer,
plug-in type
or
1 x plug-in
cable
or
Surge
arrester,
plug-in type
and
Busbar
current
transformer
2)
Voltage
transformer,
disconnectable
Current
transformer
Surge arrester
or limiter,
to be plugged in
additionally
1) Capacitive
voltage
detection
system
2) Not possible
with busbar
voltage
transformer
Siemens HA 35.51 · 2003
9
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Product Range
Double-busbar panels
Circuit-breaker panel
• With cable connection as
Circuit-breaker panel (cable connection as inside cone)
inside cone for
– Rated voltage up to 36 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal currents
of busbars and feeders
up to 2500 A
Busbar components
SS1
SS2
Components
after circuit-breaker module 2)
• With cable connection as
1)
Busbar
current
transformer
Bus sectionalizer
(circuit-breaker panel and riser
panel)
1 x plug-in
cable,
interface
type 2 or 3
or
2 x plug-in
cable,
interface
type 2 or 3
or
3 x plug-in
cable,
interface
type 2 or 3
or
4 x plug-in
cable,
interface
type 2
or
Solidinsulated bar
(e.g. Duresca
bar)
• With cable connection as
inside cone for
– Rated voltage up to 36 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal currents of
busbars and feeders
up to 2500 A
Bus sectionalizer
for
– Rated voltage up to 36 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal current
of busbars up to 2500 A
Voltage
transformer,
plug-in type
Current
transformer
Current
transformer
3)
Surge
arrester,
plug-in type
Circuit-breaker panel (cable connection as outside cone)
Busbar components
Bus coupler
for
– Rated voltage up to 36 kV
– Rated short-circuit breaking
current up to 31.5 kA
– Rated normal current of
busbars up to 2500 A
SS1
SS2
Components
after circuit-breaker module
1)
HA35-2392c eps
Metering panel
for
– Rated voltage up to 36 kV
– Rated normal current of
busbars up to 2500 A
Panel connection
components
Panel connection
versions
HA35-2391c eps
outside cone for
– Rated voltage up to 24 kV
– Rated short-circuit breaking
current up to 25 kA
(up to 12 kV: 31.5 kA)
– Rated normal currents of
busbars up to 2500 A and
feeders up to 1250 A
Components
before circuit-breaker module
Busbar
current
transformer
3 x plug-in
cable
or
2 x plug-in
cable
or
1 x plug-in
cable
Panel connection
components
Voltage
transformer,
disconnectable
Current
transformer
Surge arrester
or limiter,
to be plugged in
additionally
Abbreviations
SS1 = Busbar 1
SS2 = Busbar 2
10
Siemens HA 35.51 · 2003
1) Capacitive voltage
detection system
2) Switchgear vessel for separate inside
cone required for cable connection with
2 to 4 cables per phase
3) Ring-core current transformer, oval design, suitable for
use from 1000 A up
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Product Range
Double-busbar panels
Bus sectionalizer (cable connection as inside cone)
Bus sectionalizer, bus riser panel
Bus sectionalizer, circuit-breaker panel
SS1
SS2
Components
before bus riser module
Components
before circuit-breaker module
1)
1)
Panel
connection
versions
Panel connection
components
Voltage
transformer,
plug-in type
1)
1)
Panel
connection
versions
Current
transformer
Current
transformer
or
2 x plug-in
cable,
interface
type 2 or 3
or
2 x plug-in
cable,
interface
type 2 or 3
or
3 x plug-in
cable,
interface
type 2 or 3
or
3 x plug-in
cable,
interface
type 2 or 3
or
4 x plug-in
cable,
interface
type 2
or
4 x plug-in
cable,
interface
type 2
or
Solidinsulated
bar
or
Solidinsulated
bar
Surge
arrester,
plug-in type
Bus sectionalizer
Surge
arrester,
plug-in type
Bus coupler
SS1
SS2
Components before
circuit-breaker
module
HA35-2394c eps
HA35-2395b eps
Components before
circuit-breaker
module
Metering panel
Current
transformer
SS1
SS2
HA35-2396a eps
HA35-2393b eps
Voltage
transformer,
plug-in type
1 x plug-in
cable,
interface
type 2 or 3
1 x plug-in
cable,
interface
type 2 or 3
SS1
SS2
Panel connection
components
Current
transformer
1) Capacitive voltage
detection system
Siemens HA 35.51 · 2003
11
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Design
Single-busbar panel design
Features
circuit-breaker and busbar
• Sendzimir-galvanized sheet-
1
steel enclosure
• Self-supporting structure
• Electrical connections via
cast-resin insulated, screened and bolted module couplings
NX PLUS
HA35-2397c eps
• Stainless-steel module of
2
7
8
9
10
11
17
12
18
can be removed without
interrupting the bus wires
13
19
• Degree of protection
– IP 65 for primary parts
– IP 3XD for secondary parts
14
20
3
• Low-voltage compartment
• Lateral metallic cable ducts
for control cables
• Suitable for connecting
single and three-core cables
as well as bars
4
5
6
21
9
22
15
23
16
• Circuit-breaker module re-
24
placement without gas work
and without interrupting
busbar operation
Panel with integrated inside cone
• Instrument transformers can
be removed without changing the positions of busbar
and circuit-breaker modules
• Instrument transformers can
be removed without gas work
(located outside the gas compartments)
• Maintenance-free vacuum
circuit-breaker under normal
ambient conditions according
to IEC 60 694 / VDE 0670,
Part 1000
• Option: plug-in busbar
voltage transformer
12
Siemens HA 35.51 · 2003
1 Door of low-voltage compartment
2 Mimic diagram
3 Multifunction protection relay
SIPROTEC 4 type 7SJ61/ 7SJ62
for protection and control
4 EMERGENCY-OFF pushbutton,
mechanical
5 Door to mechanical control board
6 Cover of connection compartment
7 Busbar cover and space for plug-in
busbar voltage transformer
8 Busbar module, welded,
SF6-insulated
9 Rupture diaphragm
10 Three-pole busbar system
11 Three-position disconnector,
SF6-insulated, with the three switch
positions:
CLOSED – OPEN – READY-TO-EARTH
12 Module coupling between busbar
module and circuit-breaker module
13 Circuit-breaker module, welded,
SF6-insulated, with integrated cable
connection
14 Vacuum interrupter of circuit-breaker
15 Pressure relief duct
16 Integrated cable connection as
inside cone
17 Low-voltage compartment,
standard: 935 mm high,
option: 1100 mm high
18 Ring-core current transformer
19 Manual and motor operating
mechanism of three-position
disconnector
20 Mechanical control board
21 Manual and motor operating
mechanism of circuit-breaker
9
25
18
24
26
22
9
27
Panel with separate inside cone
9
13
18
28
23
29
24
Panel with outside cone
22
23
24
25
26
27
28
29
Voltage transformer connection socket as inside cone
Cable connection compartment
Voltage transformer
Module coupling between circuit-breaker and
cable connection module
Cable connection module, welded, SF6-insulated,
with separate cable connection
Separate cable connection as inside cone
Voltage transformer connection socket as outside cone
Cable connection as outside cone
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Design
Single-busbar panel design
Modular design
30
30 Busbar module with three-position disconnector
31 Module couplings between busbar module and
circuit-breaker module
32 Ring-core current transformer
33 Circuit-breaker module with connection for inside
cone plug-in system
34 Voltage transformer, can be plugged in via cable
35 Mechanical control board
36 Multifunction protection relay SIPROTEC 4
HA35-2425d eps
31
32
36
33
35
34
Siemens HA 35.51 · 2003
13
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Design
Double-busbar panel design
Features
• Stainless-steel module of
• Sendzimir-galvanized sheet-
steel enclosure
1
• Self-supporting structure
NX PLUS
HA35-2401b eps
7
circuit-breaker and busbar
10
• Electrical connections via
cast-resin insulated, screened and bolted module couplings
• Low-voltage compartment
can be removed without
interrupting the bus wires
8
2
9
3
• Degree of protection
– IP 65 for primary parts
– IP 3XD for secondary parts
19
13
• Suitable for connecting
5
9
6
15
• Circuit-breaker module re-
20
14
4
single and three-core cables
as well as bars
18
12
• Lateral metallic cable ducts
for control cables
17
11
21
22
23
16
placement without gas work
and without interrupting
busbar operation
24
• Instrument transformers can
be removed without changing the positions of busbar
and circuit-breaker modules
• Instrument transformers can
be removed without gas work
(located outside the gas compartments)
• Maintenance-free vacuum
circuit-breaker under normal
ambient conditions according
to IEC 60 694 / VDE 0670,
Part 1000
14
Siemens HA 35.51 · 2003
Panel with integrated inside cone
1 Door of low-voltage compartment
2 Mimic diagram
3 Multifunction protection relay
SIPROTEC 4 type 7SJ61/ 7SJ62
for protection and control
4 EMERGENCY-OFF pushbutton,
mechanical
5 Door to mechanical control board
6 Cover of connection compartment
7 Busbar cover
8 Busbar module (2x), welded,
SF6-insulated
9 Rupture diaphragm
10 Three-pole busbar system (2x)
11 Three-position disconnector,
SF6-insulated, with the three switch
positions:
CLOSED – OPEN – READY-TO-EARTH
12 Module coupling between busbar
module and circuit-breaker module
13 Circuit-breaker module, welded,
SF6-insulated, with integrated cable
connection
14 Vacuum interrupter of circuit-breaker
15 Pressure relief duct
16 Integrated cable connection as
inside cone
17 Low-voltage compartment,
standard: 935 mm high,
option: 1100 mm high
18 Ring-core current transformer,
normal or oval design
19 Manual and motor operating
mechanism of three-position
disconnector
9
25
31
26
24
9
22
27
Panel with separate inside cone
9
13
31
28
23
29
24
Panel with outside cone
9
13
16
22
31
23
24
30
Panel with integrated inside cone and current
transformers in the cable connection compartment
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Design
Double-busbar panel design
Modular design (example)
32
33
35
HA35-2426d eps
34
32 Busbar module for SS1
with three-position disconnector
33 Busbar module for SS2
with three-position disconnector
34 Module couplings between busbar module SS1
and circuit-breaker module
35 Module couplings between busbar module SS2
and circuit-breaker module
36 Ring-core current transformer, oval design
37 Circuit-breaker module with connection
for inside cone plug-in system
38 Voltage transformer, can be plugged in via cable
39 Mechanical control board
40 Multifunction protection relay SIPROTEC 4
36
37
40
39
38
Continuation of the legend from page 14
20 Mechanical control board
21 Manual and motor operating
mechanism of circuit-breaker
22 Voltage transformer connection
socket as inside cone
23 Cable connection compartment
24 Voltage transformer
25 Module coupling between
circuit-breaker module and
cable connection module
26 Cable connection module,
welded, SF6-insulated, with
separate cable connection
27 Separate cable connection as
inside cone
28 Voltage transformer connection
socket as outside cone
29 Cable connection as outside cone
30 Connection cables
31 Ring-core current transformer
Abbreviations
SS1 = Busbar 1
SS2 = Busbar 2
Siemens HA 35.51 · 2003
15
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Panel interconnection, module coupling
Panel interconnection
Panel interconnections
in the circuit-breaker panel (example)
• Designed with a module
coupling
• Solid-insulated
1
• Connects the panels with
each other, as well as the
vessels within a panel
Module coupling
• Single-pole, bolted-type
• Consisting of round copper
1
6
2
6
2
3
3
3
3
4
1
4
1
with cast-resin insulation
• Bolted busbar joint with
silicone rubber insulation
• Field control by means of
electrically conductive layers
of insulation (inside and
outside)
5
5
• Screened by earthing outer
layers with switchgear vessel
• Switchgear installation,
HA35-2375i eps
HA35-2411b eps
extension or panel replacement without SF6-gas work
Module couplings
for single-busbar panels
Module couplings
for double-busbar panels
R-HA35-074 eps
Module coupling
10
7
11
16
12
15
Busbar module,
SF6-insulated
16
9
Siemens HA 35.51 · 2003
14
Module coupling
(solid-insulated)
7
8
9
10
11
12
13
14
15
16
13
HA35-2376e eps
8
1
2
3
4
5
6
Busbar module,
SF6-insulated
Module coupling
Busbar module
Current transformer
Circuit-breaker module
End wall
Bushing in adjacent panel
Busbar conductor
Silicone sleeve
Earthing clamps
High-quality joint
Cast-resin bushing
Vessel wall
Cast-resin insulation
Conductive layer
Bolted busbar joint
Pressure ring
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Switching devices
Vacuum circuit-breaker
Switching devices
• Three-pole design
• With maintenance-free vac-
uum interrupters (= primary
part of the circuit-breaker)
in the SF6-filled switchgear
vessel
operating mechanism to the
circuit-breaker poles by means
of rods in the switchgear
vessel
R-HA35-072 eps
• Force transmission from the
1 Vacuum interrupters in
SF6-gas
2 Operating mechanism
box
• Metal bellows, as already used
with success a million times
for vacuum interrupters, for
gasketless separation of the
SF6-insulation and the operating mechanism
1
2
Vacuum circuit-breaker
(operating mechanism side open)
Operating mechanism
• Located outside the gas com-
partments and behind the
panel front
appropriate material combinations
• Lubricants with anti-seizure
properties and long endurance
R-HA35-073 eps
• Low-lubricant level thanks to
• Generally with manual and
motor operating mechanism
• Maintenance-free under nor-
3 Three-position
disconnector
4 Operating mechanism
3
mal ambient conditions (in
the switchgear room) and
with maximum permissible
number of operating cycles:
Mechanical
10 000 x
At rated normal
current
10 000 x
At short-circuit
breaking current
50 x
4
Three-position disconnector
• Up to 2000 operating cycles
• Compact design thanks to
short contact gaps in SF6-gas
Three-position disconnector
with operating mechanism
• Operating shaft and contact
blade with common pivot
point and reliable switch
position up to the panel
operating front
• Maintenance-free
Operating mechanism
• Switch position indication via
mechanically coupled flag indicators
• Separate operating shafts for
Switch positions of the three-position disconnector
“CLOSED”
• Closed current path
between busbar and
vacuum circuit-breaker
• Contact blades connected
with fixed contacts at the
busbar bushings
“OPEN”
• Open current path
between busbar and
vacuum circuit-breaker
• Isolating distances
withstand prescribed test
voltages
“READY-TO-EARTH”
• Contact blades connected
with earthing contact of
switchgear vessel
• Earthing and short-circuiting of the cable connection possible by closing the
vacuum circuit-breaker
the “Disconnecting” and
“Ready-to-earth” functions
• Generally with manual and
motor operating mechanism
Siemens HA 35.51 · 2003
17
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Protection, control, indicating and measuring equipment (examples)
• Operating mechanisms for
Multifunction
protection relay
SIPROTEC 4 7SJ63
• Electrical interlocks, option-
• For stand-alone or
• Conventional control
system or via multifunction
protection relays
Multifunction protection relay SIPROTEC 4 7SJ600/7SJ602
• User-friendly operating pro-
gram DIGSI 4 for configuration and analysis
• Communications and bus
capability
• Functions: control, protec-
tion, indicating, communications and measuring
• LCD (2 text lines) and key-
board for local operation,
configuration and display
• Four user-programmable
LEDs for displaying any
desired data
• Operation and fault indica-
tion memory
• Fault recording
• Circuit-breaker control
Multifunction protection
relay SIPROTEC 4 7SJ61/7SJ62
• For stand-alone or master
operation
• Communications and bus
capability
• Functions: control, protec-
tion, indicating, communications and measuring
• LCD (4 text lines) for process
and equipment data, in the
form of a feeder mimic diagram and as text, e. g. for
– Measuring and metering
values
– Information on status of
switchgear and switching
device
– Protection data
– General indications
– Alarms
master operation
• Communications and
bus capability
• Functions: control,
protection, indicating, communications
and measuring
2
7
• LCD for process and
4
equipment data, in
the form of a feeder
mimic diagram and
as text, e. g. for
– Measuring and
metering values
– Information on status
of switchgear and
switching device
– Protection data
– General indications
– Alarms
R-HA35-104 eps
ally mechanical interlocks for
single busbar
Multifunction protection relays SIPROTEC 4
Multifunction protection relay
SIPROTEC 4 7SJ600/7SJ602
• Four user-program-
mable function keys
for frequently performed actions
7
• Fourteen user-pro-
grammable LEDs for
displaying any desired data
• Two key-operated
4
2
switches to switch
between ”local and
remote control” and
”interlocked and
non-interlocked operation”
6
R-HA35-103 eps
three-position disconnectors
and circuit-breakers
• Keys for navigation in
menus and for entering values
Multifunction protection relay
SIPROTEC 4 7SJ61/7SJ62
• Integrated motor
control by special
relays with enhanced
performance
1
4
2
• Four user-programmable
• Seven user-programmable
LEDs for displaying any
desired data
• Keys for navigation in menus
and for entering values
18
Siemens HA 35.51 · 2003
Legend
1 LCD
2 LEDs
3 Key-operated switches
4 Navigation keys
5 Control keys
6 Function keys
7 LCD (text display)
5
3
R-HA35-102 eps
function keys for frequently
performed actions
6
Multifunction
protection relay
SIPROTEC 4 7SJ63
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Indicating and measuring equipment
ture and pressure variations
• Responds only to
changes in gas density
• Contactless measure-
ment by means of a BERO
proximity switch
Mode of operation
A measurement box in the
switchgear vessel that is
sealed gas-tight registers
the SF6-gas density, which
crucially influences the insulating capacity. By means
of a coupling magnet,
expansion of the measurement box is transmitted to
the outside to a solenoid
armature, which then activates the BERO proximity
switch.
Voltage detection
systems
For voltage detection according to IEC 61 243-5 /
VDE 0682 Part 415
• Detection systems
(option):
– LRM oder HR system
– Integrated voltage
detection systems,
LRM system: CAPDIS-S1
and -S2+
LRM or HR system
• With voltage indicator
(LRM or HR system)
• Verification of safe isola-
tion from supply phase
by phase by insertion in
each socket pair
• Voltage indicator flashes
when high voltage is
present
• Indicator suitable for
continuous operation
• Safe-to-touch
• Routine-tested
• Measuring system and
voltage indicator can be
tested
• Without auxiliary voltage
• Maintenance-free
• Integrated display without
auxiliary power supply
1 Measurement box
2 Magnetic
coupling
3 BERO proximity
switch
1
3
2
• Integrated, repeated testing
of the interfaces (selftesting)
• With integrated function test
by pressing the “Display-Test”
pushbutton, without auxiliary power supply
Ready-forservice
indicator
Stainless-steel vessel
filled with SF6-gas,
gauge pressure
50 kPa at 20 °C
• With integrated 3-phase test
Principle of operation
of gas monitoring
with ready-for-service indicator
socket for phase comparison
(also suitable for plug-in
voltage indicator)
• Degree of protection
IP 54, temperature range
– 25 °C to + 55 °C
Voltage detection systems
Features of CAPDIS-S1
• Without auxiliary power
supply
• With indication “A1” to “A4”
(see legend)
• Without ready-for-service
4 Voltage indicator,
LRM system
4
monitoring
Voltage indicator, LRM system
(inserted)
• Without signalling relay
(thus without auxiliary
contacts)
L1
L2
L3
• Integrated circuit capacity
Features of CAPDIS-S2+
–C1
• With indication “A1” to “A4”
(see legend)
ULE
–C2
• With indication “ERROR” in
case of absent external
auxiliary power supply
U2
plugged-in
HR system
Voltage detection
via capacitive voltage divider (principle)
• With ready-for-service
monitoring (auxiliary power
supply required)
mounted
CAPDIS-S1
–C1 Capacitive coupling electrode integrated into bushing
–C2 Capacity of the connection leads and of the voltage indicator
or voltage detection system to earth
ULE = UN / 3 during rated operation in the three-phase system
U2 = UA = Voltage at the interface of the switchgear or at the voltage
indicator or voltage detection system
• With integrated signalling
relay for signalling “M1” to
“M4” (auxiliary power supply
required):
– “M1”: Operating voltage
present at phases L1, L2, L3
– “M2”: Voltage not present
at L1, L2 and L3
(= active zero indication)
– “M3”: Earth fault or voltage
failure, e. g. in one phase
– “M4”: Absence of auxiliary
power supply (when voltage
present or not present)
HA35-2424b eps
• Independent of tempera-
Common features
CAPDIS-S1
L1 L2 L3
CAPDIS-S2+
L1 L2 L3
A1
A1 Operating voltage
present at L1, L2, L3
A2
A2 Voltage not present
at L1, L2, L3
A3
A3 Earth fault or failure in L1,
operating voltage at L2, L3
HA35-2543 eps
read
Ready-for-service indicator
HA35-2542a eps
• Self-monitoring; easy to
Features of integrated
voltage detection systems
R-HA35-084a eps
Ready-for-service
indicator
A4
A4 Voltage (not operating
voltage) present
Shown symbols
of the integrated indicators
CAPDIS-S1 and -S2+
Siemens HA 35.51 · 2003
19
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Mechanical control board
• Located behind the panel
1
2
3
4
the electrical control
(protection function
prevails)
5
• Integrated mechanical
R-HA35-088a eps
door
• Opening of door switches off
switch position indicators in the mimic
diagram
• Clear arrangement of
access openings and
control elements to
the associated switch
position indicators
6
7
8
• Ergonomically favour-
9
able height of all control elements
10
Interlocks
11
12
13
R-HA35-087a eps
Interlocking, either
panel-internal or across
the panels, is always
effected electrically.
In the case of singlebusbar panels, panelinternal, mechanical
interlocking is optionally
available, besides electrical
interlocking.
Mechanical control board
for single-busbar panels
Mechanical interlocking
functions (optional)
Operation of the threeposition disconnector
(disconnecting and earthing function) is interlocked with the circuitbreaker.
The operating lever of
the three-position disconnector can only be
inserted if the circuitbreaker is open and can
only be removed in a
defined end position of
the three-position
disconnector.
The circuit-breaker can
be closed as soon as the
operating lever has been
removed and the cover
of the three-position
disconnector has been
closed.
20
Siemens HA 35.51 · 2003
For safety reasons, the
mechanical ON pushbutton of the circuitbreaker is covered and
sealed.
De-earthing the feeder
can be blocked with the
lock-in of the circuitbreaker. This locks electrical and mechanical operation at the panel as well
as switching off the
circuit-breaker from
remote. The lock-in is
mechanically interlocked
with the “EARTHED” position of the three-position
disconnector, with the
result that the mechanical locking of the circuitbreaker can only be
activated in the case of
“feeder earthed”.
If an undervoltage tripping is planned, a possibility of locking is also
planned.
Mechanical control board
with open panel door
1 Switch position indicator
CLOSED/OPEN for three-position
disconnector
2 Operating shaft CLOSED/OPEN
for three-position disconnector
3 Operating shaft
OPEN/READY-TO-EARTH
for three-position disconnector
4 Switch position indicator
OPEN/READY-TO-EARTH
for three-position disconnector
5 Mimic diagram
6 Interlocking for preselection
to 2 and 3
7 Switch position indicator
CLOSED/OPEN for circuit-breaker
8 Manual charging for circuitbreaker
9 ON pushbutton for circuit-breaker
with sealable cap, mechanical
10 Locking device
for “feeder earthed”
11 OFF pushbutton for
circuit-breaker, mechanical
12 “Spring charged” indicator for
circuit-breaker
13 Operating cycle counter for
circuit-breaker
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Instrument transformers
Current transformers
Voltage transformers
• Design:
• Cast-resin insulated
• Free of dielectrically
stressed cast-resin parts
(due to design)
• Mounting locations
– At the busbar
– At the panel connection
• According to
IEC 60 044-1 /
VDE 0414 Part 1
• Certifiable
safe to touch
• Plug-in type
R-HA35-075 eps
• Metal-enclosed,
• Located outside the
primary enclosure
(switchgear vessel)
For inside cone plug-in system
• Mounting locations
– At the busbar
– At the panel connection
• For 80 % of the rated
short-duration powerfrequency withstand
voltage at rated frequency (busbar voltage
transformers)
R-HA35-076 eps
primary enclosure
(switchgear vessel)
• Inductive type
For outside cone plug-in system
• Repeat test at 80 % of
the rated short-duration
power-frequency withstand voltage with
mounted voltage transformer in the case of
busbar voltage transformers
• According to
IEC 60 044-2 /
VDE 0414 Part 2
• Certifiable
Inductive voltage transformers
R-HA35-078 eps
• Located outside the
Ring-core current transformers
For inside cone plug-in system
R-HA35-079 eps
– Ring core as the carrier of
the secondary winding
– Current path corresponds
to primary winding
For outside cone plug-in system
Siemens HA 35.51 · 2003
21
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Panel connection
Inside cone plug-in system
Connection versions
For circuit-breaker and
disconnector panels
Cable testing
ing to DIN EN 50 181
• For connection cross-sections
up to 630 mm2
• Up to 4 cable sockets and
1 voltage transformer socket
possible in each phase
HA35-2417b eps
• Suitable for bushings accord-
HA35-2412c eps
Cable connection
2
1
3
• Designed as cable plug
– For inside cone plug-in
system
– Metal-enclosed
– Fully insulated
4 cables per phase (option: surge arrester)
Interface type 2
sockets for identical interface
types
Bar connection
• One bar per phase
• Solid-insulated design
HA35-2413c eps
• Multiple connections with
4
Surge arresters
3 cables per phase (option: surge arrester)
Interface type 2 or 3
Cable testing
Cable testing equipment can
be connected after removing
the insulating cover or the
voltage transformer connection cable
HA35-2414c eps
Each cable socket can be
equipped with a surge arrester
instead of a cable plug
4
HA35-2415c eps
2 cables per phase (option: surge arrester)
Interface type 2 or 3
4
HA35-2416d eps
1 cable per phase (option: surge arrester)
Interface type 2 or 3
5
6
1 solid-insulated
bar per phase
22
Siemens HA 35.51 · 2003
1
2
3
4
Cable sockets
Voltage transformer socket
Cable plug, interface type 2
Cable plug,
plug type 2 or 3
5 Silicone sleeve
6 Solid-insulated bar
Voltage transformer
socket for
cable testing
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Components
Panel connection
Outside cone plug-in
system
Cable testing
Connection versions
For circuit-breaker and
disconnector panels
1
Cable connection
• Designed as cable T-plug
suitable for bushings
with outside cone as interface type C according to
EN 50 181
5
2
6
• Double or triple cable con-
nections possible
Surge arresters
3 cables per phase
HA35-2418b eps
to 630 mm2 (larger crosssections on request)
HA35-2421b eps
• Connection cross-sections up
Cable testing on the
mounted cable T-plug
• Can be plugged into the
cable T-plug of a single or
double cable connection
• Surge arresters are recom-
mended if, at the same time,
– The cable system is directly
connected to the overhead
line
– The protective range of the
arrester at the terminal tower
of the overhead line does not
cover the switchgear
HA35-2419b eps
3
Surge limiters
• Can be plugged into the
cable T-plug of a single or
double cable connection
• Surge limiters are recom-
mended if motors are
connected
2 cables per phase
(surge arrester or limiter can
be plugged in additionally)
Cable testing
Cable testing equipment can
be connected after removing
the insulating stopper from
the cable T-plug
HA35-2420b eps
4
1 cable per phase
(surge arrester or limiter can
be plugged in additionally)
1
2
3
4
Outside cone
Triple cable connection
Double cable connection
Single cable connection
5 Measuring bolt
6 Insulating cap
Siemens HA 35.51 · 2003
23
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Standards
Standards, specifications, guidelines
Standards
The NXPLUS switchgear
complies with the relevant
standards and specifications
applicable at the time of type
tests.
In accordance with the harmonization agreement reached by
the EU countries, their national
specifications conform to the
IEC standard.
* In future, all standards for switching
devices and switchgear will be
summarized in IEC 62 271
** Withdrawn standard
Overview of standards (December 2002)
IEC standard
Switchgear
VDE standard
up to now
current
in future
current
in future
current
IEC 60 694 *
IEC 60 694 *
IEC 62 271-1
VDE 0670 Part 1000
VDE 0671-001
EN 60 694
IEC 60 298 *
IEC 60 298 *
IEC 62 271-200 VDE 0670 Part 6
VDE 0671-200
EN 60 298
1)
IEC 60 056 ** IEC 62 271-100 IEC 62 271-100 VDE 0670 P. 101 to 106 VDE 0671-100
EN 60 056
2)
IEC 60 129 ** IEC 62 271-102 IEC 62 271-102 VDE 0670 Part 2
VDE 0671-102
EN 60 129
3)
IEC 61 243-5
IEC 61 243-5
IEC 61 243-5
VDE 0682 Part 415
VDE 0682 Part 415 EN 61 243-5
Degree of
protection
IEC 60 529
IEC 60 529
IEC 60 529
VDE 0470 Part 1
VDE 0470 Part 1
EN 60 529
Insulation
IEC 60 071
IEC 60 071
IEC 60 071
VDE 0111
VDE 0111
EN 60 071
Current
IEC 60 044-1
transformers
IEC 60 044-1
IEC 60 044-1
VDE 0414 Part 1
VDE 0414 Part 1
EN 60 044-1
Voltage
IEC 60 044-2
transformers
IEC 60 044-2
IEC 60 044-2
VDE 0414 Part 2
VDE 0414 Part 2
EN 60 044-2
1) Circuit-breaker
2) Disconnector and earthing switch
Devices
Type of service location
Insulating capacity
NXPLUS switchgear can be used
as an indoor installation in
accordance with IEC 61 936 /
VDE 0101:
The insulating capacity is verified by testing the switchgear
with rated values of shortduration power-frequency
withstand voltage and lightning impulse withstand voltage
according to IEC 60 094 /
VDE 0670 Part 1000
(see following table):
• Outside lockable electrical
service locations at places
which are not accessible to
the public. Enclosures of
switchgear can only be
removed with tools.
• Inside lockable electrical
service locations. A lockable
electrical service location is
a place outdoors or indoors
that is reserved exclusively for
housing electrical equipment
and which is kept under lock
and key. Access is restricted to
authorized personnel and persons who have been properly
instructed in electrical engineering. Untrained or unskilled persons may only enter
under the supervision of authorized personnel or properly
instructed persons.
24
Siemens HA 35.51 · 2003
EN standard
3) Voltage detection systems
All parts subjected to high voltage within the switchgear are
insulated against the earthed
outside enclosure.
This insulation permits installation of the switchgear at any
altitude above sea level without
detrimental influences on the
dielectric strength. This also
applies to cable connection.
Table – Insulating capacity
Rated voltage
(r.m.s. value)
kV 7.2 12 15
17.5 24
36 40.5
Rated short-duration power-frequency withstand voltage (r.m.s. value)
– Across isolating distances
kV 23
32
40
45
60
80
90
– Between phases and to earth
kV 20
28
36
38
50
70
85
Rated lightning impulse withstand voltage (peak value)
– Across isolating distances
kV 70
85 105 110 145 195 218
– Between phases and to earth
kV 60
75
95
95 125 170 185
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Standards
Standards, specifications, guidelines
Current-carrying capacity
• According to IEC 60 298 / VDE
0670 Part 6 or IEC 60 694 /
VDE 0670 Part 1000, the rated
normal current refers to the
following ambient temperatures:
– Maximum value
of 24-h mean
+ 35 °C
– Maximum value + 40 °C
• The current-carrying capacity
of the panels and busbars depends on the ambient temperature outside the enclosure.
Tests for resistance to internal
arc faults
Resistance to internal
arc faults
• Tests for verifying resistance to
Due to the single-pole enclosure
of external components and
the SF6-insulation of switching
devices, the probability of faults
in NXPLUS fixed-mounted
circuit-breaker switchgear is
considerably lower than in
former switchgear types, as
internal arc faults should establish proper protection for
operating personnel
• Tests for resistance to internal
arc faults can be agreed
between the owner and
manufacturer in accordance
with IEC 60 298 / VDE 0670
Part 6
• All criteria of the above
standards are met
• There are no effects due to
external influences such as
– Pollution layers
– Moisture
– Small animals and foreign
bodies
Aseismic capacity (optional)
NXPLUS switchgear can be upgraded for regions at risk from
earthquakes.
For upgrading, earthquake
qualification testing has been
carried out in accordance with
the following standards:
• IEC 68-3-3, 1993
• IEC 68-2-6, 1995
• IABG TA13-TM-002/98
(guide)
• Maloperation is practically
Within the range of the prevailing earthquake frequencies
from 1 Hz to 35 Hz, the
category 1 required response
spectrum according to IABG
TA13-TM-002/98 covers the
following response spectra:
• The three-position discon-
• Uniform Building
excluded by logical arrangement of the operating
mechanism elements
nector and the vacuum
circuit-breaker provide
short-circuit-proof earthing
of the feeder
Should arcing occur in spite of
this, the pressure is relieved towards the rear into a duct.
Code zone 3
• Seismic Requirements
Spec. 9067; Department of
Water & Power, Los Angeles
• GTS – 1.013 ENDESA, Chile
• VDE 0670 Part 111
In the unlikely event of a fault
inside the module vessel, the
energy conversion in the case
of an internal arc fault is minor
thanks to the SF6-insulation,
i.e. approximately only ½3 compared to air. The pressure relief
in the rear wall of the module
vessel operates in the range
of 2 to 3.5 bar. The escaping
gases are discharged to the
rear into a duct.
The pressure relief duct diverts
the gases upwards.
Siemens HA 35.51 · 2003
25
Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS up to 40.5 kV, SF6-Insulated
Standards
Standards, specifications, guidelines
Protection against solid
foreign bodies, electric shock
and water
IEC 60 529 / VDE 0470 Part 1
Type of protection
Degree of protection
NXPLUS switchgear complies
according to
IEC 60 529 VDE 0470 Part 1
IEC 60 298 VDE 0670 Part 6
with the following degrees of
protection:
Degree of Type of protection
protection
IP 3XD
for outer enclosure
IP 65
for all parts subjected
to high voltage
IP 3XD
sss
Protection against water
No specification
Siemens HA 35.51 · 2003
• At no point can creepage cur-
rents flow from high-voltage
potentials to earth
• Operating mechanism parts
ss
Protection against water
Protected against water jets;
water directed against the enclosure from
any direction in the form of a jet must
not have any harmful effect
26
gear vessel are provided with
single-pole enclosure
IP 65
Protection against electric shock
Protected against access to hazardous
parts with a wire
(test probe with diameter 1 mm must not ingress)
• All medium-voltage devices
• Live parts outside the switch-
Protection against electric shock
Protected against access to hazardous
parts with a wire (test probe with diameter 1 mm,
length 100 mm, must be sufficiently
clear of hazardous parts)
Protection against solid foreign bodies
Dust-tight: No ingress of dust
NXPLUS switchgear is fully
enclosed and insensitive to
climatic conditions.
are installed in a gas-tight,
welded stainless-steel
switchgear vessel which is
filled with SF6-gas
Protection against solid foreign bodies
Protected against ingress of solid foreign bodies,
diameter W 2.5 mm (test probe with diameter 2.5 mm
must not ingress)
See adjacent table for explanations about the degrees of protection
Climate and ambient
conditions
which are functionally important are made of corrosionresistant materials
• Bearings in operating mecha-
nisms are designed as dry
bearings and do not require
lubrication
Notes
If not stated otherwise on
the individual pages of this
catalog, we reserve the right
to include modifications,
especially regarding the
stated values, dimensions
and weights.
Drawings are not binding.
All product designations
used are trademarks or
product names of
Siemens AG or other
suppliers.
If not stated otherwise,
all dimensions in this
catalog are given in mm.
Responsible for
Technical contents:
Herbert Soens
Siemens AG, Dept. PTD M 2 S2
Erlangen
General editing:
Gabriele Pollok
Siemens AG, Dept. PTD CC T
Erlangen
Printed in Germany
KGK 10.03 5.0 VO/- 24 En 100793 6101/D6301
Siemens HA 35.51 · 2003
27
If you have any questions about
Power Transmission and Distribution,
our Customer Support Center
is available around the clock
Tel.: +49 180 / 524 70 00
Fax: +49 180 / 524 24 71
(Subject to charges,
e.g.: 12 ct/min.)
E-mail: support@ptd.siemens.de
www.siemens.com/ptd-support
Published by
Siemens AG
Power Transmission and Distribution
Medium Voltage Division
Postfach 32 20
91050 Erlangen
Germany
www.siemens.com/medium-voltage-switchgear
Order No.: E50001-K1435-A511-A4-7600