Focus on Medium Voltage
Medium Voltage switchgear
Secondary distribution networks
CGMCOSMOS-2LV
Fully gas-insulated ring main unit (RMU)
Up to 12 kV
IEC / SANS Standards
DESCRIPTION
Ormazabal’s CGMCOSMOS-2LV consists of a SF6 fully insulated Ring
Main Unit (2SD&1CB type) for Medium Voltage Secondary Distribution
networks up to 12 kV.
This switchgear results from the implementation of new technologies,
standards and materials, alongside the improvements arising from the
experience gained since the beginning of the 1990s.
CGMCOSMOS-2LV is a highly safe, reliable and user-friendly RMU,
capable of withstanding all environmental conditions in MV transformer
substations.
FEATURES
• Protection and safety for people, goods and equipment against internal arc effects, proven through tests performed in accordance with IEC 62271-200 standard.
• Capable of withstanding harsh environmental conditions (including temporary flooding), long service life and absence of
maintenance in live parts through full gas insulation and the use of
screened connectors.
• Small size and low weight, making handling and installation easier.
•
Safe and simple operation through the use of user-friendly driving mechanisms, including interlocks as standard and no need to
manipulate the earthing circuit while cable testing.
• Routine and traceability factory-testing in all equipments.
•Visual display of the position of the switchgear in the synoptic diagram, validated by the kinematic chain test in accordance with
IEC 62271-102.
• High anti-corrosive levels achieved with the use of innovative
materials.
• Maintenance-free live parts.
• Environmentally-friendly:
· Use of highly recyclable materials.
· Minimal gas volume per functional unit.
· End-of-life product management.
STANDARDS
• IEC 62271-1
Common specifications for high-voltage
switchgear and controlgear standards.
• SANS 1874 / NRS 006
Switchgear – metal-enclosed ring main units for rated A.C. voltages above 1 kV and up to and including 36 kV.
• SANS / IEC 62271-200
Alternating current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.
• SANS / IEC 62271-100
High voltage alternating current circuit-breakers.
• SANS / IEC 62271-102
Alternating current disconnectors and earthing switches.
• SANS / IEC 60265-1
High-voltage switches. Part 1: High voltage switches for rated voltages above 1 kV and less than 52 kV.
• SANS / IEC 60529
Degrees of protection provided by enclosures.
• SANS / IEC 61958
Voltage presence indicating systems.
• SANS / IEC 62271-202
High-voltage switchgear and controlgear – Part 202: High-voltage/low-voltage
prefabricated substation.
The CGMCOSMOS system meets the immersion tests at 3 metres water column pressure, 24 hours at rated
voltage and insulating tests at power frequency.
Focus on Medium Voltage
CGMCOSMOS-2LV RMU (2SD&1CB type)
13
14
1
10
7
8
2
9
1
4
3
8
5
11
6
12
1.
Feeder function
2.
Vacuum Circuit Breaker function
3.
Gas Tank
4.
Driving mechanism area
5.
Front cable test compartment
6.
Cable Compartment
7.
Switch-disconnector operation (motor as an option)
8.
Earthing switch operation
9.
Circuit Breaker operation (motor as an option)
10.Relay
11. ekorIVDS: Voltage presence - absence indicator
12. MV cable fixing support
13. Optional: Pressure relief duct
14. Optional: Control Box on top of the driving mechanism
Focus on Medium Voltage
ELECTRICAL CHARACTERISTICS
Feeder
Rated voltage
Frequency
Rated current
Busbars and cubicle interconnection
Feeder
Output to transformer
Short-time current
r.m.s. value 3 s
Peak value
Rated withstand voltage at power
frequency for 1 min.
Phase-to-earth and phase-to-phase
Isolating distance
Lightning impulse withstand voltage
Phase-to-earth and phase-to-phase
Isolating distance
IAC Class
Switch acc. IEC 60265-1
Short-time current (Main Circuit)
r.m.s. value 3 s
Peak value
Mainly active current breaking capacity (1)
Cable charging breaking current (I4a)
Closed loop breaking current (I2a)
Earth fault breaking current (I6a)
Earth fault breaking current √3 (I6b)
Main switch making capacity (peak value)
Switch category:
Mechanical endurance (CO operations-class)
Short-circuit makings / Electrical endurance
Circuit-Breaker acc. IEC 62271-100
& Associated Disconnector acc. IEC 62271-102
Short-time current (main circuit)
r.m.s. value 3 s
Peak value
Circuit-breaker category:
Mainly active current breaking capacity
Circuit-Breaker making capacity (peak value)
Breaking capacity
Mechanical endurance (C–O operations)
Circuit-breaker rated sequence
Earthing Switch acc. IEC 62271-102
Short-time current (Earth circuit)
r.m.s. value 3 s
Peak value
Earthing switch making capacity (Peak value)
Earthing switch category:
Mechanical endurance (CO operations-class)
Short-circuit operations / Electrical endurance
Vacuum Circuit Breaker
12
50/60
[kV]
[Hz]
[A]
630
630
-
630
630
250/630
[A]
-
20*
52*
[kV]
38
45
[kV]
95
110
--
AFL/AFLR 20* kA 0.5 s
[kA]
20*
52*
630
50/1.5
630
300
173
52*
[A]
[kA]
AF/AFL 20* kA 0.5 s
-
-
1000-M1 (manual)
5 (E3)
-
[kA]
-
20*
52*
[A]
[kA]
[kA]
-
-
630
52*
20*
2000 (M1)
0-3 min-CO-3 min-CO
20*
52*
52*
20*
52*
52*
1000- M0 (manual)
5 (E2)
1000 – M0 (manual)
5 (E2)
[kA]
[kA]
(*) Tests conducted at 21 kA/54.6 kA
Note: For other characteristics please consult Ormazabal’s Technical-Commercial Department.
PHYSICAL CHARACTERISTICS
Height [mm]
CGMCOSMOS-2LV
Focus on Medium Voltage
1500
Width [mm]
1095
Depth [mm] Bushings height [mm]
823
Feeder
800
CB
485
Weight [kg]
420
SAFETY
• Personal, goods and equipment protection against the effects of internal arcs.
• Live parts capability of withstanding harsh
environmental conditions (humidity, salinity, dust, pollution, etc.) and protection against indirect contacts.
• The leak-proof and sealed steel gas tank, houses the breaking and switching components.
• The circuit-breaker ensures the isolating distance and has earthing switching capacity, both
capabilities are provided by its associated
disconnector.
• Cable test: Easy frontal access and safe for the
operator.
• IP3XC protection rating of the cubicle assembly.
•Voltage presence detection. Ormazabal’s ekorVPIS indicator.
• Front driving mechanisms that allow safe and
simple operations.
• Standard internal interlocks preventing improper operations, in accordance with IEC 62271-200
standard. Additional interlocks with padlock or lock, as an option.
INTERNAL ARC
CGMCOSMOS-2LV cubicles are designed to protect
people and goods against the effects of internal arcs,
complying with the criteria of IEC 62271-200 standard
and NRS specifications:
• IAC Class AFL (R as an option): Up to 20* kA 0.5 s
(*) Note: Tests conducted at 21 kA
CABLE TESTING
• Design in compliance with NRS specifications.
• Easy frontal access.
• Safety for the operator: no need to manipulate the earting circuit while cable testing.
• Plug-In type connector on the test points.
• Transformer substations: safe on testing due to the distance between the test points and the metallic parts of the substation.
APPLICATIONS
Used for a wide variety of facilities, both public and
private, its main applications are:
• Utility transformer substations.
• Private transformer substations.
• Remote controlled substations.
•Infrastructures.
• Industrial facilities.
• Wind farms.
• Photovoltaic facilities.
• Co-generation facilities.
•etc.
Focus on Medium Voltage
TECHNICAL-COMMERCIAL DEPARTMENT
Tel.: +34 94 431 87 31
Fax: +34 94 431 87 32
www.ormazabal.com
Products, applications, solutions:
xx
Medium Voltage switchgear
Primary Distribution networks
xx
Medium Voltage switchgear
Secondary Distribution networks
xx
Protection, control, automation,
and remote control
xx
Distribution Transformers
xx
Low Voltage switchgear
xx
Prefabricated Transformer Substations
--
Medium Voltage applications
for Renewable Energies
CA-326-GB-1103