GE
Industrial Solutions
12kV-24kV
New Compact Gas
Insulated Ring Main Unit
Leading the future of electrification
GE
GE is a diversified organization covering a myriad of market segments, including infrastructure,
finance and media. From energy, water, transportation and health to access to money and
information, GE serves customers in more than 100 countries and employs more than 300,000
people worldwide.
The company traces its beginnings from Thomas A. Edison, who established the Edison Electric Light
Company in 1878. In 1892, a merger of Edison General Electric Company and Thomson-Houston
Electric Company created the General Electric Company. GE is the only company listed in the Dow
Jones Industrial Index today that was also included in the original index in 1896.
Industrial Solutions
GE Industrial Solutions, a division of GE Energy Management, is a global leading provider in
power distribution, offering a wide range of services and products which include medium and low
voltage power distribution equipment and components, motor & control systems and service
products that are safe, reliable and offer high performance.
Honour
2010 World's Most Innovative Companies
2011 World’s Most Admired Companies
2009 World’s Most Respected Companies
2011 Best Global Brand
2008 World’s Most Respected Companies
2007 World’s Best R&D Companies
12kV-24kV
New Compact Gas
Insulated Ring Main Unit
Leading the future of electrification
Contents
General Introduction
About GE
GE Industrial Solution
Product Description
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 02
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 04
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 06
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08
Product Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08
Main Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 09
Advanced Manufacturing and Testing Process . . . . . . . . . . 10
Integrated solutions
Basic Functional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Common-gas Tank Ring Main Unit . . . . . . . . . . . . . . . . . . . . . 22
Switchgear Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Configurations
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Embedded SecoVac-R vacuum Circuit Breaker . . . . . . . . . . 30
Integrated Fuse Compartment . . . . . . . . . . . . . . . . . . . . . . . . . 30
SecoLBS Three Position Load Break Switch . . . . . . . . . . . . . 31
Cable Bushings With Integrated Sensors. . . . . . . . . . . . . . . . 31
Pressure Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Panel Padlock Device and Interlocks. . . . . . . . . . . . . . . . . . . . 32
Key Locking Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
LV Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Multilin 3 Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Typical Solutions & Installation Guide
Outdoor Switching Substation . . . . . . . . . . . . . . . . . . . . . . . . . 48
SecoRMU Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SecoRMU Control Circuit Principle Drawing . . . . . . . . . . . . . 52
SecoRMU Dimensions and Installation Foundation . . . . . . 55
SecoRMU Order Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
12kV/17.5kV/24kV New Compact Gas
Insulated Ring Main Unit
Applications
The traditional 12kV/17.5kV/24kV primary distribution network is mainly arranged as a
Product Description
radial network, or arranged as a combination of radial and tree network. Since many
users are connected in "T" form to a power line, any maintenance or fault on the power
line will make all the users connected suffering power off. A power supply system is
not reliable enough. That's why today ring power supply systems are widely used in
secondary distribution networks, thus helping to improve reliability.
SecoRMU is such a kind of medium voltage switchgear used in ring power supply
networks. With the features of completely sealed, modular design, flexible combination
and extension, SecoRMU provides integrated solutions for most switching applications
in urban-rural power cable upscale, power distribution network, wind farm, industry,
O&G, underground installation, as well as municipal construction, commercial buildings,
residential and other construction fields.
02
Product Description
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
+
+
+
+
03
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Operating conditions
Normal operating conditions
The switchgears are fundamentally designed for the normal service
conditions for indoor switchgears to IEC 60694.
●● Ambient temperature
Maximum: +40°C
Minimum: - 25°C
●● Humidity
Max daily average relative humidity: 95%
Product Description
Max monthly average relative humidity: 90%
●● The maximum site altitude is 1000m above sea level
●● Seismic intensity: 9 degrees (IBC higher level)
Special operating conditions
In accordance with IEC60694, the manufacturer and end-user must
agree on special operating conditions which deviate from operation
under normal conditions. The manufacturer/supplier must be consulted
in advance if special severe operating conditions are involved.
SecoRMU is designed for use in the following applications:
●● Power Grid
●● Industrial Power Supply
●● Compact secondary substations
●● Wind power plants
●● Commercial buildings
●● Mining applications
●● Airports
●● Railway systems
●● Underground installations
04
Product Description
Applications
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
05
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Features & Benefits
Modular, Compact, High performance
SecoRMU gas insulated ring main unit is a compact, modularized, extendable or fixed
gas insulated ring main unit with the primary conductive system sealed in a stainless SF6
gas tank, providing customers a safe, reliable, high-performance and maintenance-free
product.
Small and Compact
Product Description
SecoRMU uses a vacuum circuit breaker
and adopts SF6 gas as the insulated
medium in the gas tank. SF6 has strong
electronegativity and excellent dielectric
insulating performance. Its insulating
strength is about 2-3 times the strenght
of air in an uniform electric field. The
excellent insulating performance of SF6
gas Maintaince free helps SecoRMU to
realize its small and compact structure, as
well as safety and reliability.
Fully Modular Design/Extendable
The basic functional module units
K, T, V, C have uniform dimensions:
350×800×1380mm (width×depth×height).
Convenient for system design, flexible
replacement and upgrading.
Each unit can extend to the left or
right freely. Specially designed busbar
connectors make the combination and
extension of SecoRMU switchgear simple,
safe and reliable.
The big cable compartment also ensures
a convenient cable installation and
connection.
06
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Safe and Reliable
Both the gas tank and the cable
compartment are internal arc classified
(20kA/1s), in order to ensure maximum
personal safety.
Three position switch for natural
Advanced and Integrated
Solutions
SecoRMU is environment independent
Adopting international advanced design,
because its primary conductive system
manufacturing and testing process,
is fully sealed in the SF6 gas tank and will
SecoRMU series ring main units have
not be influenced by the outside world.
simple structures, flexible operations and
Its sealing is systematically checked by
reliable interlocks.
automatic helium leakage detection
With the advanced sensor technology
process at the factory, ensuring less than
and up-to-date microcomputer
0.1% annual leakage rate. The gas tank
protection relay, SecoRMU provides
passed water immersed testing, reaching
integrated solutions to meet different user
IP67 protection grade.
requirements..
Besides, SecoRMU realizes no clearance
splicing for installing an extension,
independent of the impact of dew,
dust, salt fog, small animals, chemical
substances, etc.
Therefore, SecoRMU is free of maintenance
and can be used under various severe
operating conditions.
Reliable
Environment Independent/Very
Low Maintenance
Product Description
interlocking.
07
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Standards
Product Description
SecoRMU is manufactured and tested in accordance with the latest version of:
IEC62271-200
High-voltage switchgear and controlgear – Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above
1kV and up to and including 52 kV
IEC60265-1
High-voltage switches – Part1: Switches for rated voltages above 1 kV and less than 52 kV
IEC62271-100
High-voltage switchgear and controlgear – Part 100: High-voltage alternating current circuit-breakers
IEC62271-105
High-voltage switchgear and controlgear – Part 105: Alternating current switch-fuse combinations
IEC60282-1
High-voltage Fuses –Part 1 Current limiting fuses
IEC62271-102
High-voltage switchgear and controlgear – Part 102: Alternating current disconnectors and earthing switches
IEC62271-1
The common specifications for high-voltage switchgear and controlgear standards
IEC376-1971
Specification and acceptance of new Sulfur Hexafluoride
IEC 60529
Degrees of protection provided by enclosures (IP code)
IEC 60694
Common specifications for high-voltage switchgear and controlgear standards
IBC-2012
International Building Code
Product Type
SER - □ - □ / □ □ □
Cable's entrance or exit mode
L: left entrance exit
R: right entrance exit
LR: both sides entrance exit NA: non entrance exit
Extension mode
I: left extendable
ID: both sides extendable
D: right extendable
NA: Non-extendable
Rated current
630: 630A rated current
Rated voltage
12: 12kV rated voltage
17: 17.5kV rated voltage
24: 24kV rated voltage
Type of ring main unit
K: load switch unit T: load switch-fuse combined unit
V: vacuum circuit-breaker unit B: bus tie unit
C1/C2: bus bar lift unit*
M: measurement unit*
VT: VT unit* P: Power supply unit
(Common-tank ring main unit is combined freely by individual module units. For example, KT
denotes a two-unit common-tank ring main unit made of one load switch unit and one load
switch-fuse combined unit.)
Product type
For example:
SER-V-12/630ID is a vacuum circuit-breaker unit with 12kV rated voltage and 630A rated current, both sides extendable .
SER-KKT-12/630 is a three-unit common-tank ring main unit, made of two load switch units and one load switch-fuse combined unit,
with 12kV rated voltage and 630A rated current, not extendable.
*Note: C1/M/VT Air insulated
C2
SF6 gas insulated
08
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Main Technical Data
Unit
Load Break
Switch Unit
Switch-fuse Unit
Vacuum
Circuit-breaker Unit
Rated Voltage
kV
12/17.5/24
12/17.5/24
12/17.5/24
Rated Current
A
630
(1)*
630
Rated Frequency
Hz
50 /60
50/60
50/60
Rated power Freq withstand voltage (1 min)
kV
28/50/50
28/50/50
28/50/50
Rated lightening impulse withstand voltage (peak)
kV
75/125/125
75/125/125
75/125/125
kA (peak)
52
82
52
-
20kA-3s
25kA-1s
-
20kA-3s
25kA-1s
kA
-
31.5
20
kA (peak)
52
65
-
52
65
Operating Sequence
-
-
-
O-0.3s-CO-180s-CO
O-0.3s-CO-15s-CO
Electrical Endurance Capability class
-
E2 for load switch
E2 for load switch
E2 for breaker
Transfer Current
A
-
1400
-
Rated mainly active load-breaking current
A
630
(1)*
-
Rated closed-loop breaking current
A
630
-
-
Rated cable-charging breaking current
A
16
-
31.5
Rated earth fault breaking current
A
10
-
-
Rated cable- and line-charging breaking current under
earth fault conditions
A
45
-
-
Mechanical Endurance
times
5000
5000
10000
Dimension (W×D×H)
mm
350×800×1380
350×800×1380
350×800×1380
kg
160
180
200
Item
Rated short-circuit making current
Rated short time withstand current (main circuit)
Rated short-circuit breaking current
Peak withstand current for main circuit
Weight
Internal arc degree
IP Degree
Cable compartment
20kA 1s
Gas tank
20kA 1s
Enclosure
IP3X
Gas tank
IP67
SF6 Gas pressure at 20℃
0. 03MPa-relative
SF6 Gas Annual Leakage Rate
<0.1%
Thickness of stainless steel gas tank
3.0mm
Electric operation control voltage
Product Description
12/17.5/24kV SecoRMU Rating and electrical performance
24/48/110/220V DC 110/220V AC
(1)* Depending on the current rating of the fuse-link. Please refer to transformer-fuse selection table in page 34.
09
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Product Description
Advanced Manufacturing and Testing Process
TRUMPF CNC laser
cutting/punching center
NC HEDRICH vacuum resin
mixture/pressure molding system
The laser beam cutting precision of
The epoxy resin insulating components,
German TRUMPF CNC laser cutting/
such as SecoVac-R vacuum circuit-breaker,
punching center is ±0.05mm, while the
fuse compartment, cable connector,
targeting precision of this machine is
extension bushing, insulator, etc., are
0.02mm, ensuring the splicing clearance
produced by Germany NC HEDRICH
of the gas tank 0.1mm.
vacuum resin mixture/pressure molding
system, ensuring perfect insulation
performance. The partial discharge is less
than 0.5pC.
TRUMPF three-dimensional fiveaxis CNC laser welding system
with automatic helium protection
The laser has the features of high
accuracy and energy concentrating.
The laser welding process can weld the
stainless steel in a split second without
using any solder, which is equal to plate
bending. It usually makes deep and
complete welding, ensuring the reliability
and quality identity of the gas tank. The
annual leakage rate is less than 0.1%.
10
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Product Description
SEILER automatic helium leakage
detection equipment
German SEILER automatic helium
leakage detection equipment guarantees
sensitivity, accuracy and efficiency of the
gas tank leakage detection, which ensures
a leakage rate less than 0.1% per year
and a service life of over 30 years.
NC VOGEL mixture of silicone
rubber/pressure molding system
Power Diagnosix fully shielded
partial discharge testing
laboratory
The silicon rubber insulation components,
such as busbar connector, cable bushing,
GE has a top-class fully shielded partial
end plug etc., are produced by the Swiss
discharge testing laboratory, with
NC VOGEL mixture of silicone rubber/
advanced German Power Diagnosix partial
pressure molding system.
discharge detector. Partial discharge
testing is performed to ensure the high
quality of the product.
11
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Integrated solutions
Integrated Solutions
Basic functional modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
12
Common-gas Tank Ring Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Switchgear Extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Integrated Solutions
Basic Functional Modules
K Load break switch unit
K
Dimensions:
Width: 350mm
Depth: 800mm
Height: 1380mm
Function
●● Connect or disconnect the incoming/outgoing cable with the main busbar
●● Earthed three-phase cables
●● Making short circuit current
Standard Configuration
Optional Features
●● Three position load break and earthing switch
●● Left/right incoming or outgoing cable
●● Spring operating mechanism
●● Left/right extendable
●● Switch position indication for load break switch and earthing
●● Electrical operating mechanism
switch
DC24/48/110/220V, AC110/220V
●● Potential indicator
●● Short circuit and earth fault indicator
●● SF6 gas pressure Gauge
●● Ring CT and ampere meter
●● 630A busbar
●● Arrester
●● Earthing bar
●● Double cable plug
●● Interlock between the earthing switch and the door/operation
●● Auxiliary contacts for load break switch position
shaft
●● Cable bushings with integrated sensors
●● Panel padlock device
Integrated Solutions
Weight: 186kg
3NO+3NC
●● Auxiliary contacts for earthing switch position
2NO+2NC
13
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
T Switch-fuse unit
T
Dimensions:
Width: 350mm
Depth: 800mm
Height: 1380mm
Weight: 180kg
Integrated Solutions
Function
●● Control and protect 1600kVA and below distribution transformers at 24kV rated voltage
●● Control and protect 1000kVA and below distribution transformers at 10kV rated voltage
Standard Configuration
Optional Features
●● Three position switch-fuse disconnector with upstream
●● Left/right incoming or outgoing cable
earthing switch mechanically linked with downstream earthing
●● Left/right extendable
switch
●● Electrical operating mechanism
●● Spring operating mechanism
●● Switch position indication for switch-fuse disconnector and
earthing switch
DC24/48/110/220V, AC110/220V
●● Opening coil
DC24/48/110/220V, AC110/220V
●● Fuse compartment
●● Short circuit and earth fault indicator
●● Potential indicator
●● Ring CT and ampere meter
●● SF6 gas pressure Gauge
●● Arrester
●● 630A busbar
●● Double cable plug
●● Earthing bar
●● Load break switch position auxiliary contacts
●● Interlock between the earthing switch and the door/operation
shaft
●● Cable bushings with integrated sensors
●● Panel padlock device
3NO+3NC
●● Auxiliary contacts for earthing switch position
2NO+2NC
●● Auxiliary contacts for fuse blown
1NO
●● Fuse (Please refer to transformer-fuse selection table on
page 34)
14
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
V Vacuum circuit-breaker unit
V
Dimensions:
Width: 350mm
Depth: 800mm
Height: 1380mm
Weight: 227kg
Scheme 1
Scheme 2
●● Used for circuit protection, motor protection and transformer protection
Standard Configuration
Optional Features
●● Three position disconnector and earthing switch
●● Left/right incoming or outgoing cable
●● 630A vacuum circuit-breaker
●● Left/right extendable
●● Operating mechanism of the vacuum circuit-breaker
●● Electrical operating mechanism of vacuum circuit-breaker
●● Mechanical interlock and position indicator for vacuum circuit-
breaker and three position disconnector and earthing switch
●● Potential indicator
●● SF6 gas pressure Gauge
●● 630A busbar
DC24/48/110/220V, AC110/220V
●● Closing coil
DC24/48/110/220V, AC110/220V
●● Opening coil
DC24/48/110/220V, AC110/220V
●● Earthing bar
●● Ring CT and ampere meter
●● Interlock between the earthing switch and the door/operation
●● Arrester
shaft
●● Operating mechanism interlock between vacuum circuit
breaker and disconnector
●● Cable bushings with integrated sensors
●● Panel padlock device
●● Protection relay and protection CT
Integrated Solutions
Function
●● Double cable plug
●● Auxiliary contacts for vacuum circuit-breaker position
4NO+4NC
●● Auxiliary contacts for disconnector position
2NO+2NC
●● Auxiliary contacts for earthing switch position
1NO+1NC
15
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
B Bus tie unit
B
Dimensions:
Width: 350mm
Depth: 800mm
Height: 1380mm
Weight: 160kg
Integrated Solutions
Function
●● Used for busbar coupling
Standard Configuration
Optional Features
●● Two position load break switch
●● Left/right incoming or outgoing cable
●● Operating mechanism
●● Left/right extendable
●● Switch position indicator
●● Electrical operating mechanism of load break switch
●● SF6 gas pressure Gauge
●● 630A busbar
●● Panel padlock device
16
DC24/48/110/220V, AC110/220V
●● Auxiliary contacts for load break switch position
3NO+3NC
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
C Bus lifting unit
C
Dimensions:
Width: 350mm
Depth: 800mm
Height: 1380mm
Weight: 100kg
●● Used for connecting with incoming/outgoing cables
Standard Configuration
Optional Features
●● 630A busbar
●● C1 Air insulated adopted
●● Potential indicator
●● C2 SF6 gas insulated adopted
Integrated Solutions
Function
●● Earthing bar
17
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
M Metering unit
M
Dimensions:
12kV
24kV
Width: 600mm
Width: 800mm
Depth: 800mm
Depth: 1000mm
Height: 1380mm
Height: 1380mm
Weight: 480kg
Weight: 550kg
Integrated Solutions
Function
18
●● Air insulated, used for electric power measurement
Standard Configuration
Optional Features
●● 630A busbar
●● Two current transformers
●● Three current transformers
●● Two potential transformers
●● Three potential transformers
●● Arrester
●● Fuse for protecting VT
●● A watt-hour meter
●● Potential indicator
●● A var-hour meter
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
VC Vacuum circuit-breaker & Bus tie unit
+
+
+
+
+
+
VC
Dimensions:
M
12kV
24kV*
Width: 700mm
Width: 830mm
Depth: 800mm
Depth: 800mm
Height: 1380mm
Height: 1380mm
Weight: 300kg
Weight: 350kg
* Pls. contact GE for further information.
●● Used as a tie breaker
Standard Configuration
Optional Features
●● Three position disconnector and earthing switch
●● Electrical operating mechanism of vacuum circuit-breaker
●● 630A vacuum circuit-breaker
●● Operating mechanism of the vacuum circuit-breaker
●● Mechanical interlock and position indicator for vacuum circuit-
breaker and three position disconnector and earthing switch
●● Potential indicator
DC24/48/110/220V, AC110/220V
●● Closing coil
DC24/48/110/220V, AC110/220V
●● Opening coil
DC24/48/110/220V, AC110/220V
●● SF6 gas pressure Gauge
●● Ring CT and ampere meter
●● 630A busbar
●● Auxiliary contacts for disconnector position
●● Earthing bar
●● Interlock between the earthing switch and the door/operation
shaft
●● Operating mechanism interlock between vacuum circuit-
Integrated Solutions
Function
2NO+2NC
●● Auxiliary contacts for earthing switch position
1NO+1NC
●● Cable plugs used for busbar coupling
breaker and disconnector
●● Cable bushings with integrated sensors
●● Panel padlock device
●● Relay and protection CT
19
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
VT VT unit
VT
Dimensions:
12kV
24kV
Width: 600mm
Width: 800mm
Depth: 800mm
Depth: 1000mm
Height: 1380mm
Height: 1380mm
Weight: 280kg
Weight: 330kg
Integrated Solutions
Function
●● Monitor busbar voltage, providing voltage-lost signal
Standard Configuration
Optional Features
●● 630A busbar
●● Three potential transformers
●● Two potential transformers
●● Disconnector
●● Fuse for protecting VT
●● Arrester
●● A voltmeter
●● Potential indicator
20
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
KPT Disconnector & VT unit
Kpt
Dimensions:
12kV
Width: 480/600mm
Depth: 800mm
Height: 1380mm
Weight: 300kg
V
V
●● Monitor busbar voltage, providing voltage-lost signal
Standard Configuration
Optional Features
●● Three position disconnector and earthing switch
●● Left/right incoming or outgoing cable
●● Spring operating mechanism
●● Electrical operating mechanism
●● Position indicator of disconnector and earthing switch
DC24/48/110/220V, AC110/220V
●● Potential indicator
●● Short circuit and earth fault indicator
●● SF6 gas pressure Gauge
●● Arrester
●● 630A busbar
●● VT cable connector
●● Earthing bar
●● Auxiliary contacts for disconnector position
●● Interlock between the earthing switch and the door/operation
shaft
●● Cable bushings with integrated sensors
●● Panel padlock device
Integrated Solutions
Function
3NO+3NC
●● Three potential transformers
●● Auxiliary contacts for earthing switch position
2NO+2NC
●● 1 set of three-phase VT
●● Fuse for protecting VT
●● A voltmeter
21
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Common-gas Tank Ring Main Unit
SecoRMU provides economical schemes for putting multi units into a common tank. One gas tank can accommodate up to 5 modules
combined freely. Each unit is extendable and capable of splicing with other individual-gas tanks or common-gas tank units.
KK
Dimensions:
Width: 700mm
Depth: 800mm
Height: 1380mm
KT
Dimensions:
Integrated Solutions
Width: 700mm
Depth: 800mm
Height: 1380mm
C2K
Dimensions:
Width: 700mm
Depth: 800mm
Height: 1380mm
C2T
Dimensions:
Width: 700mm
Depth: 800mm
Height: 1380mm
22
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
C2V
Dimensions:
Width: 700mm
Depth: 800mm
Height: 1380mm
VV
Dimensions:
Depth: 800mm
Height: 1380mm
KKK
Integrated Solutions
Width: 700mm
Dimensions:
Width: 1050mm
Depth: 800mm
Depth: 1380mm
KKT
Dimensions:
Width: 1050mm
Depth: 800mm
Depth: 1380mm
23
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Common-gas Tank Ring Main Unit
KTK
Dimensions:
Width: 1050mm
Depth: 800mm
Height: 1380mm
KTT
Dimensions:
Width: 1050mm
Depth: 800mm
Integrated Solutions
Height: 1380mm
KKKK
Dimensions:
Width: 1400mm
Depth: 800mm
Height: 1380mm
KTTT
Dimensions:
Width: 1400mm
Depth: 800mm
Height: 1380mm
24
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
KKTT
Dimensions:
Width: 1400mm
Depth: 800mm
Height: 1380mm
KTKT
Dimensions:
Width: 1400mm
Depth: 800mm
KKKKK
Dimensions:
Width: 1750mm
Integrated Solutions
Height: 1380mm
Depth: 800mm
Height: 1380mm
KTTTK
Dimensions:
Width: 1750mm
Depth: 800mm
Height: 1380mm
25
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Common-gas Tank Ring Main Unit
KTTTT
Dimensions:
Width: 1750mm
Depth: 800mm
Height: 1380mm
KKKKT
Dimensions:
Width: 1750mm
Integrated Solutions
Depth: 800mm
Height: 1380mm
KKKTT
Dimensions:
Width: 1750mm
Depth: 800mm
Height: 1380mm
KKTTT
Dimensions:
Width: 1750mm
Depth: 800mm
Height: 1380mm
26
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Switchgear Extension
The extendable feature allows customers to build functional
module units into various solutions to suit their requirements.
With specially designed busbar connectors, SecoRMU realizes
no clearance splicing. No dimension is needed for installing an
extension, which protects the product against the harmful effects
of dust, water, solid foreign objects etc., realizing high reliability.
SecoRMU can be extended on site without handling SF6 gas,
or requiring any special floor preparation, realizing simple
installation.
Besides, SecoRMU can protect operators from the risk of touching
external live parts, ensuring safe operation. Wrong connection
Integrated Solutions
between phases is impossible to happen.
27
Configurations
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Configurations
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Embedded SecoVac-R vacuum Circuit-breaker . . . . . . . . . . . . . . . 30
Integrated Fuse Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SecoLBS Three Position Load Break Switch . . . . . . . . . . . . . . . . . . . 31
Cable Bushings With Integrated Sensors . . . . . . . . . . . . . . . . . . . . . 31
Pressure relief device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Panel Padlock Device and Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . 32
Key Locking Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
LV compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Multilin 3 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
28
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Configurations
Overview
SecoRMU is a new compact modular switchgear, with a high-quality stainless steel gas
tank containing all live parts and switching functions. The gas tank is manufactured
through a laser cutting and laser welding process. The entire series includes individualgas tank solution and common-gas tank solution. Each unit is extendable and uses a
Pressure Gauge
Metering
Compartment
Gas Tank
Busbar Extension
Configurations
busbar connector for switchgear extension.
Fuse Compartment
Operating Mechanism
Enclosure
Pressure Relief Device
Cable Bushing
29
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
VCB
Configurations
Operating Mechanism of VCB
Embedded SecoVac-R
Vacuum Circuit-breaker
Bus Extension
Mature embedded SecoVac Series VCB
Gas Tank
technology
Operating Mechanism
●● Three-phase in one module. Horizontal
arrangement
●● Most compact V panel. The width of V
Fuse Compartment
panel is 350mm, which is exactly the
same as K, T, C modules
●● HEDRICH equipment and high quality
epoxy resin ensure perfect insulation
performance
●● Class E2/M2/C2. Mechanical endurance
10,000 times
Integrated Fuse
Compartment
Cast three-phase entrance/exit cable
connectors and fuse compartment
together. The fuse compartment is
triangular arranged inside the gas tank
and independent of environmental
influence.
30
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Load Break Switch
SecoLBS Three Position
Load Break Switch
Pressure Relief Device
The three position load break switch uses
with a pressure relief device. When an
SF6 gas as the arc extinguishing medium.
internal arc fault occurs, the pressure relief
●● A moving contact assembly with 3
device will open, allowing the pressurized
Each gas tank of SecoRMU is equipped
stable positions (closed, open and
gas flowing to the pressure relief channel
earthed), makes natural interlocking.
at the bottom of the gas tank, to release
Such design makes simultaneous
the pressure. The rated bursting point is 2
closing of the switch or circuit-breaker
times the standard atmospheric pressure.
Configurations
Operating Mechanism of LBS
and the earthing switch impossible
●● The earthing switch has a short circuit
making capacity, as required by the
standards
●● With clear mechanical position
indicator
●● Class M2/E3. Mechanical endurance
Cable Bushings With
Integrated Sensors
5000 times
An integrated sensor inside the cable
bushing, provides a voltage signal to
the potential indicator. The indicator can
display whether the cable is live or not.
31
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Panel Padlock Device and Interlocks
There is a main circuit schematic diagram and mechanical position indicator on each unit’s front cover. The highly reliable indicator
connects with the main spindle without any indermediate mechanism. All operating mechanisms are situated outside the SF6 gas tank
and behind the front cover. That way, it’s easy to access the operating mechanisms if retrofit or service should be required.
Configurations
Padlock
2
1
Both Load Break Switch and
Earthing Switch are Locked
Earthing Switch Locked
Push the interlock selector to the left
switch is in closed position.
In the VCB panel, it is only possible to
or right, to expose the corresponding
When interlocking is fitted, the cable
lever the interlock to permit operating the
operation holes to operate the earthing
cabinet can only be accessed when the
disconnector or the earthing switch when
switch or the load break switch/
earthing switch is in the closed position.
the VCB is in open position.
disconnector.
So is the fuse compartment cover.
Carry out the operation through the
It’s impossible to bring the load break
interlock selector to prevent mis-operation.
switch or the disconnector in open
It’s impossible to operate the load break
position if the cable compartment cover is
switch/disconnector when the earthing
not mounted properly
switch is in earthed position or operate
the earthing switch when the load break
32
Load Break Switch Locked
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Key Locking Applications
Medium-voltage locking system between panels or between panels and upstream or downstream equipment are widely used in both
IEC and GB market. The purpose is to prohibit incorrect operation and bring users the following benefits:
Locking systems guarantee:
●● Safety of personnel
●● Safety of equipment
●● Continuity of operation
SecoRMU can achieve the following applications by use of Castell, Fortress and China local brand Lock.
Application 1: SecoRMU in semi-crossed locking
Prohibits the closing of the earthing switch of the downstream switchgear unless the upstream switchgear is locked in the open
1 key for 2 lock
Key 1
Configurations
position.
Application 2: SecoRMU in crossed locking
Prohibits the closing of the earthing switch unless the upstream and downstream switchgear is locked in the open position.
Lock 3
Lock 1
Lock 4
Key 1
Key 2
Lock 2
2 key for 2 lock
(Key 1 for Lock 1&2, key 2 for Lock 3&4)
33
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Key Locking Applications
Application 3: SecoRMU in interlocking between two incoming feeders
Prohibits the closing of the earthing switch unless the upstream and downstream switchgear is locked in the open position.
1 key for 2 lock
Configurations
Key 1
Application 4: SecoRMU in interlocking of two incoming feeders and a bus tie
Prohibits the closing the other two switchgears unless one of the switchgear is locked in the open position.
Lock 1
Lock 2
Key 1
Key 1
2 key for 3 lock
34
Lock 3
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Application 5: SecoRMU in interlocking on transformer feeders
Prohibits access to the transformer unless the earthing switch has been locked in the closed position.
Configurations
Lock 2
Lock 1
Key 1
1 key for 2 lock
Lock 2 on the Transformer Access Door
Application 6: T panel/ low voltage side
Prohibits closing of the earthing switch and access to any protection unit fuses unless the main LV circuit breaker has been locked in
the open position or disconnected position.
Lock 2
Lock 1
Key 1
35
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Key Locking Applications
Application 7: SecoRMU in Anti-parelling cross interlocking
Prohibits the closing the switchgears at the same time and also prohibits the access to the alive cable between the RMUs. (This is one
of the typical RMU application in the Australia mining industry).
Key 1 Key X
Key 3 Key X
Key 4
Configurations
Key 2
Key 1
Key 2 Key X
Key 3
Key 4 Key X
Legend
Unlock, free key
Locked, no key
*Note
1. Key lock is not available on the load break switch side of T panel
2. Key lock retrofit on site is not recommended and not possible for every case. Please contact GE for further information.
36
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
LV Compartment
Dimensions:
n×350(w)*380(D)*400(H) mm
The LV compartment on top of the switchgear can be equipped with a condensation monitor, a remote terminal
Configurations
unit, an I/O terminal module, additional protection relays, communication devices etc.
LV
Compartment
37
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Protection
Transformer/Line Protection
SecoRMU offers two methods for transformer protection:
Protected by a Switch-fuse Combination
The striker pin of the fused holder can activate the spring
charging mechanism of the load break switch when a fault
occurs. The load break switch will trip immediately and the
current will be broken by the fuse.
Fuse Replacement
Configurations
According to IEC recommendations, when a fuse has blown, all
three fuses should be replaced.
The dimension of the fuse-link:
Length after triggering
26
45
Φ76
33
33
442
* If fuse diameter < 76mm, a pilot sleeve must be on the no-striker end of
the fuse before fuse installation.
Recommended Fuse Ratings for Transformer
( Normal operating with no overload, -25℃ <Ø< 40℃ )
Service voltage
Un
(kV)
50
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
Rated
voltage
range of
fuse-link
10/12kV
10
16
20
20
25
31.5
40
40
50
63
80
100
*
*
6/12KV
15/17.5kV
4
10
16
16
20
20
25
31.5
40
40
50
63
*
*
20/24kV
4
10
10
16
16
20
20
25
31.5
40
40
50
63
80
Transformer output
(kVA)
1)* Please contact GE for further information.
2)Table above is based on EFEN type fuses. If other brand fuse is required, please contact GE.
38
10/24KV
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SEG WIC1
Ring CT
When using a vacuum circuit-breaker for
WIC1 is a CT-powered protection relay
transformer and line protection, WIC1
with minimal space requirement which
CT-powered protection relay of SEG
complies with the highest demands for a
(supplied as an option) can be used to
digital protection device. It also has simple
provide protection against short circuit,
but safe wiring, and high electromagnetic
overcurrent and grounding fault.
interference immunity.
Configurations
Protected by VCB in Combination with a Relay
Product description
In the WIC1 the following protection functions are included:
●● 3 phase definite time overcurrent and short circuit protection with variable tripping times (ANSI 50/51)
●● 3 phase overcurrent protection with selectable inverse time characteristics and definite time short circuit current element (ANSI
50/51)
●● Definite time earth overcurrent protection by internal calculation (ANSI 50N/51N)
39
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
User Interface
The adjustment of WIC1 protection functions is done via DIP switches. Each protective parameter is binary coded set by 4 DIP switches.
Therefore, there are 16 incorporations available in total. It is also possible to read out the stored fault values and setting values of the
WIC1.
The interface can be found at the left of the relay and also above the DIP switch block.
Configurations
Switch block; Switch No.
40
Setting parameter
1; 1-4
IS: Rated CT current
1; 5-8
Choice of characteristics
2; 1-4
I>: Pick-up value of the definite time overcurrent element or startvalue of the inverse time characteristic.
2; 5–8
tI>: Tripping time of the definite time overcurrent element or factor 'a' of the inverse time characteristic
3; 1-4
I>>: Pick-up value of the short circuit element
3; 5-8
tI>>: Tripping time of the short circuit element
4; 1-4
Ie>: Pick-up value of the definite time earth overcurrent element
4; 5-8
tIe>: Tripping time of the definite time earth overcurrent element.
If there is no earth fault function, the DIP switch block 4 is not incorporated.
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
CTs for the WIC1
There are six different transformation ratio CTs for the protection system WIC1, depending on the rated primary current.
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
DIP1-3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
DIP-4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
HEX-Schalter Is
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
WIC1-W1
8
9
10
11
12
13
14
15
16
17
18
20
22
24
26
28
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
WIC1-W2
16
18
20
22
24
26
28
30
32
34
36
40
44
48
52
56
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
WIC1-W3
32
36
40
44
48
52
56
60
64
68
72
80
88
96
104
112
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
WIC1-W4
64
72
80
88
96
104
112
120
128
136
144
160
176
192
208
224
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
WIC1-W5
128
144
160
176
192
208
224
240
256
272
288
320
352
384
416
448
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
WIC1-W6
256
288
320
352
384
416
448
480
512
544
576
640
704
768
832
896
Teststrom CD
0.32
0.36
0.40
0.44
0.48
0.52
0.56
0.60
0.64
0.68
0.72
0.80
0.88
0.96
1.04
1.12
In the WIC1, the earth current is calculated and cannot be measured. Zero-sequence CT is not necessary to install.
Transformation
Ratio
25:1
50:1
100:1
200:1
400:1
800:1
Configurations
DIP1-1
DIP1-2
41
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Measurement, Protection and Control
For more information visit our website: http://www.gedigitalenergy.com/multilin/catalog/3Series.htm
Multilin 3 Series
Configurations
Intuitive industrial and utility
protective relay systems
for feeders, motors and
transformers
Key benefits
●● Easy-to-use and cost effective protection and control for
feeders, motors and transformers
●● Effortless draw-out construction eliminates requirements for
test switches and reduces downtime
●● Environmental monitoring system to alarm on destructive
operating conditions to enable preventative maintenance
●● Easy-to-use interface and set up in one simple step
●● Accelerated Life Cycle Tested to ensure reliability of relay
operation under abnormal conditions
●● Advanced power system diagnostics to increase reliability
through fault and disturbance recording capabilities
●● Arc Flash mitigation via zone intertripping, flex curves and
multiple setting groups
●● Application flexibility with the use of programmable logic
elements
●● Large backlit display with 40 characters for easy viewing of
relay information and settings
●● Flexible communications with multiple ports & protocols to
allow seamless integration into new and existing infrastructure
●● Easy access to information via multiple communication
network options including USB, Serial, Fiber & Copper Ethernet
●● Reduced wiring with support for remote I/O
●● Reduced setup and configuration time with the Simplified
Motor Setup screen
●● Powerful Security Audit Trail tool to increase security and
minimize system risks by tracking setting changes
Applications
●● Advanced protection, monitoring & control relays for feeders
(Multilin 350), motors (Multilin 339) and transformers (Multilin
345)
●● Industrial feeders with enhanced breaker monitoring and
diagnostics
42
●● Distribution utility downstream breaker protection
●● Medium voltage utility feeders with advanced control features
including, cold load pickup, auto reclose and multiple setting
groups
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Features
Easy-to-use
Protection & control
Drawout construction
(for Multilin 350 Feeder Protection System)
The Multilin 3 Series offers a complete
●● Phase, neutral and ground TOC and IOC
drawout feature, eliminating the need for
●● Undervoltage, overvoltage, frequency
rewiring after testing has been concluded.
●● Neutral/ground directional
The withdrawable feature also eradicates
●● Negative sequence overcurrent
the need to disconnect communication
●● ANSI, IAC, IEC, flex curves
●● Cable Thermal Model protection
Overview
cables, e.g. fiber, copper, RJ45, etc and
helps retain the communication status
●● Breaker failure
The Multilin 3 Series of protection relays
even after a relay has been withdrawn
●● Cold load pick-up
are highly functional, economical
from its case.
●● Four-shot auto reclose
protection relays for feeders, motors and
●● 8 digital inputs, 7 contact outputs
transformers. By providing an economical
●● Two setting groups
system for protection, control, monitoring
●● Event Recorder: 256 events with 1ms
time stamping
●● Oscillography with 32 samples per
cycle and digital states
●● IRIG-B clock synchronization
●● Relay & Asset Health Diagnostics
●● Security audit trail
and metering, and with both local and
Configurations
Metering & monitoring
remote user interfaces in one assembly,
the Multilin 3 Series relays effectively
eliminate the need for expensive discrete
components.
The Multilin 3 Series provides detailed
diagnostic information allowing users to
troubleshoot and minimize downtime.
Detailed diagnostics are provided via the
Advanced communications
User interface and programming
256 1ms time stamped event recorder
●● 4x20 character LCD display
and the 192 cycle Oscillography report
Easy integration into new or existing
●● Control panel with 12 LED indicators
sampled at 32 samples per cycle.
infrastructure
●● Front USB and rear serial, Ethernet and
The robust Multilin 3 Series streamlines
With several Ethernet and serial port
user work flow processes and simplifies
options and a variety of communication
engineering tasks such as configuration,
protocols, the Multilin 3 Series provides
GOOSE, ModBus™ RTU, ModBus™
wiring, testing, commissioning, and
advanced and flexible communication
TCP/IP, DNP 3.0, IEC 60870-5-104, IEC
maintenance. This cost-effective relay
selections, enabling seamless integration
60870-5-103
also offers enhanced features such as
into new or existing applications.
diagnostics, preventative maintenance,
The Multilin 3 Series supports various
device health reports and advanced
industry standard protocols such as, IEC
security features.
61850 & IEC 61850 GOOSE, Modbus RTU,
Fiber ports
●● Multiple protocols - IEC 61850 & 61850
EnerVista™ software
●● An industry-leading suite of software
tools that simplifies every aspect of
working with Multilin devices
Modbus TCP/IP, DNP3.0, IEC 60870-5-104
and IEC 60870-5-103.
●● Document and software archiving
toolset to ensure reference material
and device utilities are up-to-date
43
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Enhanced diagnostics
EnerVistaTM Launchpad
Security
Preventative maintenance
EnerVista™ Launchpad is a complete set of
Security audit trail
The Multilin 3 Series allows users to track
powerful device setup and configuration tools
The Multilin 3 Series monitors security
relay exposure to extreme environmental
that is included in the SR relays at no extra
and reliability of asset protection. The
conditions by monitoring and alarming
charge.
Multilin 3 Series protection devices
at high temperatures. This data allows
●● Set up the Multilin 3 Series Relays - and any
offer complete traceability of any
users to proactively schedule regular
other Multilin device - in minutes. Retrieve
relay setting and command changes,
maintenance work and upgrading
and view oscillography and event data at
allowing the user to quickly identify
the click of a button
changes made to the relay.
activities.
●● Build an instant archive on any of the
All relays utilize EnerVista setup
TM
software for communication, monitoring
latest Multilin manuals, service advisories,
and metering. Actual values, setpoints,
application notes, specifications or
status, trending and waveform capture
firmware for your SR Relay
●● Automatic document and software version
Configurations
information can all be viewed via
the software and can be used for
updates via the internet and detailed e-mail
troubleshooting.
notification of new releases
User Interface
●● SETPOINT GROUP 1, 2:
These indicators are continuously on if the corresponding group provides settings for protection elements.
TRIP:
The indicator turns on when the relay detects a trip condition.
Operates the trip relay to open the breaker.
ALARM:
While the relay detects an alarm condition, the indicator flashes.
PICKUP:
Indicator lights steady when any protection feature pickup threshold exceeded.
●● DISPLAY:
4 line text for easy viewing of key data.
●● LEDs:
10 LED indicators for quick diagnostics.
●● KEYPAD:
Ten button keypad for access to device interrogation and change of settings.
●● FRONT PORT:
An electrically isolated front USB communication port.
Protection Features
ANSI Device Numbers & Functions
BUS
BUS VT
52
79
TRIP
3
CLOSE
1
50N
2
51P
2
51N
1
CLP
1
50_2
1
50BF
49
1
1
59X
59_2
1
1
59N
81U
1
81O
2
2
METERING
1
79
50G/
51G
51G
50G
TRANSIENT RECORDER
EVENT RECORDER
1
350 RELAY
44
27X
1
MONITORING
50P
LOAD
59P
27P
1
2
Device
Number
27P
27X
49
50P
50N
50G
50BF
50_2
51P
51G
51N
59P
59X
59N
59_2
67G
67N
79
81U
81O
CLP
Function
Phase Undervoltage
Auxiliary Undervoltage
Thermal Model
Phase Instantaneous Overcurrent
Neutral Instantaneous Overcurrent
Ground/Sensitive Ground
Instantaneous Overcurrent
Breaker Failure
Negative Sequence Overcurrent
Phase Timed Overcurrent
Ground Timed Overcurrent
Neutral Timed Overcurrent
Phase Overvoltage
Auxiliary Overvoltage
Neutral Overvoltage
Negative Sequence Overvoltage
Ground Directional Overcurrent
Neutral Directional Overcurrent
Autoreclose
Underfrequency
Overfrequency
Cold Load Pickup
Latched Lockout available as a standard feature
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Electric Operating Mechanism
Busbar Connectors
SecoLBS load break switch and SecoVac-R
Specially designed for ring main unit's
vacuum circuit-breaker can be equipped
expansion and connection, the busbar
with an electric operating mechanism
connectors have compact structures and
with remote control functions, without
small connecting resistances. This way,
influencing the structure and dimension of
the connection between ring main units
the module.
is reliable and convenient. The busbar
Motor power supply: 24VDC, 48VDC,
connector, with the shape of an inner
110VDC, 220VDC.
cone, adopts shielded silicon rubber to
40W 12r/min motor for LBS mechanism;
fully seal and insulate the interconnecting
70W 50r/min motor for VCB mechanism.
busbar and terminal busbar bushing. It
Pressure Gauge/Density Relay
Configurations
Accessories
can also be reserved for future expansion.
Each gas tank is equipped with a pressure
gauge or density relay in the front panel,
observing SF6 gas pressure or density, in
order to ensure the safety and reliability of
the operations.
End Plug
Operating Handle
Used for sealing the end terminal of the
Used for operating the mechanism
ring main units on both sides. Keep the
manually.
switchgear for future extension.
45
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
268
100
Applicable standards: EN50181 DIN47636
●● Shielded type (touchable), non-shielded
Configurations
Accessories
Cable Terminal
46
type (untouchable)
●● Front plug cable connector, rear plug
cable connector, rear plug lightning
conductor
●● Cross section of cable: 35mm2~400mm2
●● For 2 cables per phase connections,
door with additional depth is provided,
but maintaining same foundation
Operating Handle
layout as a standard unit (Front
Used for charging the spring of the VCB
cable connector, or front plug cable
mechanism.
connector + rear plug arrester). If 3
plug cable connector + rear plug
cables or more are required (nonstandard panel), please contact GE
Fault Indicator
Panels are equipped with short-circuit/
grouding fault indicator to locate the
faults. Sensors are installed on the HV
cables, thus monitoring and displaying
accurately.
Typical Solutions & Installation Guide
Outdoor switching substation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
SecoRMU Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SecoRMU Control Circuit Principle Drawing . . . . . . . . . . . . . . . . . . . 52
SecoRMU Dimensions and Installation Foundation . . . . . . . . . . . . 55
SecoRMU Order Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Typical Solutions& Installation Guide
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
47
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
Typical Solutions & Installation Guide
Outdoor Switching Substation
The outdoor ring main unit substation adopts a metal-enclosed
prefabricated structure, with excellent mechanical strength. Its
protection degree can reach IP53, which protect the machine
against the harmful effects of the ingress of water and solid
foreign objects (like small animals).
Ventilation
There are louvers on the upper and lower sections of each side of
the enclosure, with removable filters fitted inside.
Thermal Insulation
The roof is lined with double-layer high-quality heat insulation
Typical Solutions& Installation Guide
foam.
Anti-condensation
The slope of the roof is designed more than 3°. The big roof
cover, combined with good ventilation, prevents the switching
substation from condensating.
Typical combination
3-way unit
1350× 1200× 1750
4-way unit
1700× 1200× 1750
5-way unit
2050× 1200× 1750
6-way unit
2400× 1200× 1750
Metering unit + 4-way unit
2300× 1200× 1750
Metering unit + 5-way unit
2650× 1200× 1750
4-way unit + metering unit + 2-way unit
3000× 1200× 1750
* If a special dimension is required, please contact GE.
48
Dimension (Width × Depth × Height mm)
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Dimensions
SecoRMU K Panel
120
120
4
3
5
4-11×18
25
300
350
NO.
1
2
3
4
5
Title
720
800
Typical Solutions& Installation Guide
(868)
1262
1380
110
K gas tank assembly
Earthing copper bar between panels
Earthing bar
Vertical earthing busbar
Assembly of K frame
49
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Dimensions
SecoRMU T Panel
110
120
120
1262
1380
1
6
2
(560)
Typical Solutions& Installation Guide
5
3
4
3
300
350
NO.
1
2
3
4
5
6
50
25
Title
T gas tank assembly
Earthing copper bar between panels
Vertical earthing busbar
Earthing copper
Assembly of T frame
Fuse holder
720
800
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU V Panel
120
1
120
7
850
480
1380
1262
6
2
3
4
3
300
350
NO.
1
2
3
4
5
6
7
4-11×18
Title
25
720
800
Typical Solutions& Installation Guide
(550)
5
V gas tank assembly
Earthing copper bar between panels
Vertical earthing busbar
Earthing copper
Assembly of V frame
CB operating device
Operate machine (manual)
51
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Control Circuit Principle Drawing
K
N
L
1ZK
9
101
Manual
closing
13 14
5
1
RC
M5
M2
14 13
2 1
2 1
109
138
SBS
13 14
RA
3
D1
D4
D2
D3
135
2 1
M4
X2
105
3
2 1
Remote
tripping
102
Manual
tripping
Tripping
relay
LBS
tripping
indication
LBS
closing
indication
1
Rectifying
circuit
RA
11 7
401
M
RC
11 7
Code name.
SA1
SB,SBS
1ZK
RA
RC
M1' ,M1 ～ M6
D1 ～ D4
VR
SQ
2 1
1
X2
SBS
X1
M1
M4
SB
X1
M1'
M2
14 13
201
Closing
relay
Remote opening
SBS1
23 24
SA1
RA 1
9 5
108
SB
RC
136
Remote
closing
Red
Black
402
RC
6
10
202
VR
Motor
RA
6
10
Component name and type
Quantity
Button with lock LA39-11Y/AU
Button LA39-11/r g
MCB
Opening relay
Closing relay
Position switch LXW16-11AL42
Diode
Voltage Dependent Resistor
Electric live indicator DXN8A-T3/S
1
2
1
1
1
7
4
1
1
Remark
Technical requirement
Remark: In figuration, the load switch is in the opening position and the earthing
switch is in the closing position.
RC: Closing Relay
RA: Opening Relay
M1': Load break switch operation handle interlock switch
M1: Earthing switch operation handle interlock switch
M2~M4: Travel switch for load break switch position
M5~M6: Travel switch for earthing switch position
52
Closing circuit
SA1
13 14
M
Remote closing
Tripping circuit
106
Typical Solutions& Installation Guide
Breaker
1ZK
SB1
Power supply
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
T
L
N
1ZK
Breaker
1ZK
Remote closing
106
SB
Manual
closing
13 14
9 RC 5
1
RA
RC
M5
9 1
14 13
2 1
RA
KT
14 13
KT
5 9
M2
2 1 109
M2
M1
2 1
2 1
1
3
TQ
A1 A2
M4
3
1
136
Remote opening
SBS1
SA1
23 24
X2
135
2 1
M3
X2
105
3
SBS
X1
D1
D4
D2
D3
201
102
Reverse
charging relay
Remote
tripping
Manual
tripping
LBS
tripping
indication
LBS
closing
indication
1
Rectifying
circuit
RA
11 7
RC
11 7
Code name.
SA1
SB,SBS
1ZK
RA
RC
KT
M1' ,M1 ～ M7
D1 ～ D4
VR
SQ
SBS
13 14
M3
SB
X1
Closing
relay
Timing relay
14 13
M7 3
1 2
M1'
401
Red
M
VR
Black
402
RC
10
6
202
Motor
RA
6
10
Component name and type
Quantity
Button with lock LA39-11Y/AU
Button LA39-11/r g
MCB
Charging relay
Closing relay
Timing relay ST6P-2 0.5 ～ 5s
Position switch LXW16-11AL42
Diode
Voltage Dependent Resistor
Electric live indicator DXN8A-T3/S
Remark
1
2
1
1
1
1
8
4
1
1
Typical Solutions& Installation Guide
SA1
13 14
Closing circuit
101
M
Remote
closing
Tripping circuit
SB1
Power supply
Technical requirement
Remark: In figuration, the load switch is in the opening position and the earthing
switch is in the closing position.
RC: Closing Relay
RA: Opening Relay
M1': Load break switch operation handle interlock switch
M1: Earthing switch operation handle interlock switch
M2~M4: Travel switch for load break switch position
M5~M6: Travel switch for earthing switch position
M7: Charging travel switch
TQ: Opening Coil
53
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Control Circuit Principle Drawing
V
14
1ZK
SA1
Power supply
1ZK
Breaker
101
Remote closing
SB1
SB
13 14 106
Remote
closing
M1
M1'
QF
2 1
2 1
2 4
CK1 3
HQ
1 2 A1 A2
Remote opening
SBS1
1
QF
3
138 1
X2
135
6 8
QF
X2
105
5
HR
X1
TQ
3
A1 A2
QF
HG
X1
Manual
closing
Remote
tripping
M7
SBS
13 14 136
102
Manual
tripping
VCB
tripping
indication
VCB
closing
indication
7
VR
D1
D4
D2
D3
CK2 3
1 2
Typical Solutions& Installation Guide
201
Rectifying
circuit
401
Red M Black
D5
Code name.
Component name and type
SA1
SB,SBS
1ZK
M1' ,M1 ～ M6
D1 ～ D4
VR
KA
AP
Button with lock LA39-11Y/AU
Button LA39-11/r g
MCB
Position switch LXW16-11AL42
Diode
Voltage-dependent resistor
Relay SCM 4C0/DC24V 5A
Relay protect equipment ST260
1
2
1
7
4
1
1
1
Remark: In figuration, the VCB is in the opening position and uncharging
while the 3-position switch is in the earthing position.
HQ: Closing Coil
TQ: Opening coil
QF: VCB Auxiliary switch
M1': Disconnector operation handle interlock switch
M1: Earthing switch operation handle interlock switch
M2~M4: Travel switch for load break switch position
M5~M6: Travel switch for earthing switch position
M7: Limit switch of cable compartment door
54
Quantity
Technical requirement
CK1~CK3: VCB charging position switch
Motor
202
Remark
Closing circuit
13
N
Tripping circuit
L
M
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Dimensions and Installation Foundation
Unit
800
720
25
K
T
A
D
V
B
C
350
300
M
VT
P
600
550
1)A foundation is made up of two pieces of 10#
channel steel (as shown below).
2)The depth of the cable trench is determined by
110
requirements of the technical specifications.
%RWWRPYLHZ
Back to wall 500mm suggested
480
the actual cable types, as well as meeting the
3)Each ring main unit has the same depth, while
the distance between the hole's center of two
800
770
different channel steels is 720mm. The panel
can be fixed on the channel steel by the spot
welding process.
Gas tank
2SHUDWLQJPHFKDQLVPFRPSDUWPHQW
50
Primary and secondary cable installation hole
6HFWLRQYLHZRIFDEOHWUHQFK
720
545
≥800mm suggested
100
50
10# channel steel
M16 mounting hole
Channel steel top view
Typical Solutions& Installation Guide
868
Pressure release channel
1380
Pressure relief device
55
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Dimensions and Installation Foundation
1200
770
Front Side
Back Side
Bottom View
2400
2300
350
350
350
1200
10# channel steel
350
Operating
mechanism
compartment
800
600
3mm above the ground
K
T
K
T
PT
10# channel steel
148.5
550
A-A
Entry cover plate
290
1200
2420
2080
1840
Front
1750
A-A view
On left and right
95
Ladder
960
980
1540
30
302
1750
1675
Gas tank
Back
56
Front view
Side view
1685
1990
Cable port
240
1685
1482
Cable port
Angle steel for cable fixation
Typical Solutions& Installation Guide
750
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Order Form
Customer
Contact Person
Project
Tel
Address
Fax
Delivery Time
E-mail
Power Supply Type⑥
Quantity
Quantity
Quantity
Rated Voltage
12kV□ 17.5kV□ 24kV□
Rated Current
Operating Voltage of
Electric Mechanism
DC24V□ DC48V□ DC110V□ DC220V□ AC110V□ AC220V□
3
B
□
□
4
V
□
5
C
6
□
□
/
/
□
□
□
/
/
/
/
/
/
□
/
□
□
/
□
/
/
/
□
□
/
/
/
M
/
/
/
□
□
/
/
/
7
VT
/
/
/
□
□
/
/
/
8
P
/
/
□
□
/
/
Quantity (Set)⑥
□
Cable Connector⑤
□
SR3
T
WIC1
2
3CT/3VT
□
2CT/2VT
□
Fuse Current④
Electric
K
Relay Protection
Type①
1
CT/ VT
No.
Manual
Cable's Entrance or Exit Mode③
Extension Mode②
Type①
No.
Operating
Mechanism
630A□
Remark
C
/
/
T
□
□
□
/
/
□
□
□
/
/
□
□
/
/
/
□
□
□
/
Quantity (Set)⑥
□
□
/
Cable Connector⑤
□
SR3
T
WIC1
□
Relay Protection
3CT/3VT
□
CT/ VT
2CT/2VT
Electric
K
Fuse Current④
Manual
Cable's Entrance or Exit Mode③
Extension Mode②
Operating
Mechanism
/
Remark
Typical Solutions& Installation Guide
Individual Ring Main Unit
Common-tank Ring Main Unit
9
10
/
57
SecoRMU 12kV-24kV New Compact Gas Insulated Ring Main Unit
SecoRMU Order Form
3CT/3VT
WIC1
SR3
/
□
□
/
/
□
□
/
□
□
/
/
T
□
□
/
□
□
□
/
K
□
□
/
□
□
/
/
/
□
□
/
/
K
/
K
/
/
□
□
K
/
/
□
□
□
□
□
/
K
□
□
□
□
□
/
K
□
□
/
□
□
/
/
/
□
□
/
/
K
/
/
□
□
T
/
/
□
□
□
□
□
/
T
/
/
□
□
□
□
□
/
□
□
□
□
□
/
T
Typical Solutions& Installation Guide
/
Quantity (Set)⑥
2CT/2VT
□
Cable Connector⑤
Fuse Current④
Electric
13
Relay Protection
Manual
Cable's Entrance or Exit Mode③
Extension Mode②
Type①
No.
12
CT/ VT
□
K
11
Operating
Mechanism
Remark
Optional Accessories
Name
14
Quantity
Name
Operating Handle
Check Phase Apparatus
Padlock
Auxiliary Contact ( 1NO+ 1NC)
Busbar Connector
Busbar Terminal Plug Cover
Quantity
Others
Note①: 1) K – Load switch unit; T - Load switch-fuse combined unit; B - Bus tie unit; V - Vacuum circuit-breaker unit; C - Busbar lift unit; M - Metering
unit; VT – VT unit.
2) Common-tank ring main unit is combined freely by individual C, T or K ring main unit. A common-tank RMU can be assembled by maximum
5 individual units.
Note②: Please remark the extension mode of the RMU products. Remark "D" if it's right extendable. Remark "I" if it's left extendable. Remark "ID" if it's
both sides extendable. Remark "/" if it's not extendable.
Note③: Please remark the cable's entrance or exit mode if the RMU is connected by cable. Remark "R" if it's right entrance-exit. Remark "L" if it's left
entrance-exit. Remark "LR" if it's both sides entrance-exit. Remark "/" if there is no entrance-exit cable.
Note④: Please refer to the transformer-fuse selection table (shown in page 34) for reference.
Note⑤: Please notice the specifications (such as size, type etc.) of the cable connector.
Note⑥: Example: please fill the blank of quantity item "9" if the scheme is P+K+M+TT+B+TT+M+K+P.
58
Greater China
Shanghai
4F, Building 2, CTP, No.1 Hua Tuo Rd. Zhang Jiang Hi-Tech
Park, Shanghai, China 201203
T : +86 21 3877 7888
F : +86 21 3877 7600
Taiwan
6F, No. 8, Min Sheng E. Rd., Sec. 3, Taipei 10480
T : +886 2 2183 7000
F : +886 2 2516 6829
South East Asia
Malaysia
Level 6, 1 Sentral, Jalan Travers, Kuala Lumpur Sentral
Kuala Lumpur, Malaysia 50470
T : +603 2273 9788
F : +603 2273 7988
Philippines
8F Net Cube Building, 30th Street, Corner 3rd Avenue,
Crescent West Park, Global City Taguig 1634
T : +63 2 877 7000
F : +63 2 846 0629
Indonesia
BRI II Tower, 27th floor, Jl. Jend. Sudirman No. 44-46
Jakarta 10210
T: +62 21 573 0430
F: +62 21 574 7089
Thailand
25th floor, CRC Tower, All Seasons Place, 87/2 Wireless
Road, Lumpini, Pathumwan, Bangkok 10330
T : +66 2 648 0240
F : +66 2 648 0200
Vietnam
Saigon Centre, Unit 1, Floor 7, Le Loi Boulevard, District 1
HoChiMinh City
T : +84 8 3914 6700
F : +84 8 3827 8229
Singapore
240 Tanjong Pagar Road, #06-00 GE Tower
Singapore 088540
T : +65 6326 3718
F : +65 6326 3015
India
India
Polt No. 42/1 & 45/14, Electronic City-Phase II
Bangalore-560100
T: (080) 41434000
F: (080) 41434199
Australia & New Zealand
Australia
125-127 Long Street, Smithfield, Sydney, NSW 2164
T : +61 2 8788 6911
F : +61 2 8788 7224
North Asia
Japan
11F, Akasaka Park Bldg.,5-2-20, Akasaka, Minato-ku
Tokyo 107-6111
T : +81 3 3588 5288
F : +81 3 3585 3010
New Zealand
Level 1, 8 Tangihua Street, Auckland, North Island
T : +64 9 353 6706
F : +64 9 353 6707
Korea
22, Daewangpangyo-ro 712 beon-gil, Bundang-gu,
Seongnam-si, Gyeonggi-do, 463-400, Korea
T: +82-31-620-6000
F: +82-31-620-7070
Europe & Middle East
Spain
P.I. Clot del Tufau, s/n, E-08295 Sant Vicenç de Castellet
T: +34 900 993 625
Belgium
Nieuwevaart 51, B-9000 Gent
T: +32 (0)9 265 21 11
Finland
Kuortaneenkatu 2, FI-00510 Helsinki
T: +358 (0)10 394 3760
France
Paris Nord 2, 13, rue de la Perdrix
F-95958 Roissy CDG Cédex
T: +33 (0)800 912 816
Poland
Ul. Odrowaza 15, 03-310 Warszawa
T: +48 22 519 76 00
and
Ul. Leszczyńska 6, Bielsko-Biała 43-300
T: +48 33 828 62 33
Italy
Centro Direzionale Colleoni
Via Paracelso 16, Palazzo Andromeda B1
I-20864 Agrate Brianza (MB)
T: +39 039 637 3701
Netherlands
Parallelweg 10, Nl-7482 CA Haaksbergen
T: +31 (0)53 573 03 03
Germany
Robert-Bosch Str. 2a, 50354 Hürth-Efferen
T: +49 (0) 2233/ 9719-0
Portugal
Rua Camilo Castelo Branco, 805, Apartado 2770
4401-601 Vila Nova de Gaia
T: +351 22 374 60 00
Hungary
Vaci ut 81-83. H-1139 Budapest
T: +36 1 447 6050
Latin America
Latin America
790 N.W. 107th Avenue, Suite 200, Miami, Fl 33172 USA
T: +1 305 551 5155
Chile
Vespucio Norte, Avenida Presidente Eduardo Frei
Montalva 6001, Edificio N° 66
Comuna: Conchalí, Sector el Cortijo, Santiago
T: (56 2) 928-4700
North America
USA
41 Woodford Avenue, Plainville CT, USA 06062
and
12305 Kurland Drive, Houston, TX USA 77034
T: +1 800-431-7867
Brazil
Av. María Coelho Aguiar, 215, Bloco C - 6.Andar
Jd.São Luiz, 05804-900, São Paulo
T: +55 11 36141900
Mexico
Av. Churubusco 3900 Nte, Col. Industrial Benito Juárez
Monterrey, N.L. 64517
T: (01-800) 800-1968
Russia
27/8, Electrozavodskaya street, Moscow, 107023
T: +7 495 937 11 11
South Africa
Unit 4, 130 Gazelle Avenue, Corporate Park Midrand 1685
P.O. Box 76672 Wendywood 2144
T: +27 11 238 3000
United Arab Emirates
Injaz Building, 3rd Floor
Dubai Internet City, PO Box 11549, Dubai
T: +971 4 4546912
United Kingdom
2 The Arena, Downshire Way
Bracknell, Berkshire
RG12 1PU
T: +44 (0) 800 587 1239
GE
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