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Medium Voltage switchgear Secondary distribution networks

CGMCOSMOS-2LVFully gas-insulated ring main unit (RMU)Up to 12 kV IEC / SANS Standards

CGMCOSMOS-2LVFully gas-insulated ring main unit (RMU)

Up to 12 kV

Medium Voltage switchgear Secondary distribution networks

Ormazabal’sCGMCOSMOS-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.

•Protectionandsafety for people, goods and equipment against internal arc effects, proven through tests performed in accordance with IEC 62271-200 standard.

•Capableofwithstanding 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.

•Smallsizeandlowweight, making handling and installation easier.• Safeandsimpleoperation through the use of user-friendly driving

mechanisms, including interlocks as standard and no need to manipulate the earthing circuit while cable testing.

•Routineandtraceabilityfactory-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.•Highanti-corrosivelevels 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.

The CGMCOSMOS system meets the immersion tests at 3 metres water column pressure, 24 hours at rated voltage and insulating tests at power frequency.

•IEC62271-1Common specifications for high-voltage switch gear and controlgear standards.

•SANS1874/NRS006Switchgear – metal-enclosed ring main units for rated A.C. voltages above 1 kV and up to and including 36 kV.

•SANS/IEC62271-200Alternating current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.

•SANS/IEC62271-100High voltage alternating current circuit-breakers.

•SANS/IEC62271-102Alternating current disconnectors and earthing switches.

•SANS/IEC60265-1High-voltage switches. Part 1: High voltage switches for rated voltages above 1 kV and less than 52 kV.

•SANS/IEC60529Degrees of protection provided by enclosures.

•SANS/IEC61958Voltage presence indicating systems.

•SANS/IEC62271-202High-voltage switchgear and controlgear – Part 202: High-voltage/low-voltage prefabricated substation.

Description

Features

Standards

CGMCOSMOS-2LVFully gas-insulated ring main unit (RMU)

Up to 12 kV

Medium Voltage switchgear Secondary distribution networks

Technical dataElectricalcharacteristics Feeder VacuumCircuitBreakerRatedVoltage [kV] 12

Ratedfrequency [Hz] 50 / 60

RatednormalcurrentBusbars and cubicle interconnection

[A]

630 630Feeder 630 630Output to transformer - 250/630

Short-timecurrentr.m.s. value 3 s

[A] -201)

Peak value 521)

Ratedwithstandvoltageatpowerfrequencyfor1min.Phase-to-earth and phase-to-phase

[kV]38

Isolating distance 45

LightningimpulsewithstandvoltagePhase-to-earth and phase-to-phase

[kV]95

Isolating distance 110IAC Class -- AFL/AFLR 201) kA 0.5 s AF/AFL 201) kA 0.5 s

Switchacc.IEC60265-1

Short-timecurrent(MainCircuit)r.m.s. value 3 s

[kA]201)

-Peak value 521)

Mainly active current breaking capacity (1)

[A]

630

-

Cable charging breaking current (I4a) 50/1.5Closed loop breaking current (I2a) 630Earth fault breaking current (I6a) 300Earth fault breaking current √3 (I6b) 173

Mainswitchmakingcapacity(peakvalue) [kA] 521) -

Switchcategory:Mechanical endurance (CO operations-class) 1000-M1 (manual)

-Short-circuit makings / Electrical endurance 5 (E3)

Circuit-Breakeracc.IEC62271-100&AssociatedDisconnectoracc.IEC62271-102

Short-timecurrent(maincircuit)r.m.s. value 3 s

[kA] -201)

Peak value 521)

Circuit-breakercategory:Mainly active current breaking capacity [A]

-

630Circuit-Breaker making capacity (peak value) [kA] 521)

Breaking capacity [kA] 201)

Mechanicalendurance(C–Ooperations) - 2000 (M1)

Circuit-breakerratedsequence - 0-3 min-CO-3 min-CO

EarthingSwitchacc.IEC62271-102

Short-timecurrent(Earthcircuit)r.m.s. value 3 s

[kA]201) 201)

Peak value 521) 521)

Earthingswitchmakingcapacity(Peakvalue) [kA] 521) 521)

Earthingswitchcategory:Mechanical endurance (CO operations-class) 1000- M0 (manual) 1000 – M0 (manual)Short-circuit operations / Electrical endurance 5 (E2) 5 (E2)

1) Tests conducted at 21 kA/54.6 kA

For other characteristics please consult Ormazabal.

Physicalcharacteristics

CGMCOSMOS-2LV

Height[mm] Width[mm] Depth[mm] Bushingsheight[mm] Weight[kg]

1500 1095 823Feeder CB

420800 485

CGMCOSMOS-2LVFully gas-insulated ring main unit (RMU)

Up to 12 kV

Medium Voltage switchgear Secondary distribution networks

1. Feeder function2. Vacuum Circuit Breaker function3. Gas Tank4. Driving mechanism area5. Front cable test compartment6. Cable Compartment7. Switch-disconnector operation (motor as an option) 8. Earthing switch operation9. Circuit Breaker operation (motor as an option)10. Relay11. ekorIVDS: Voltage presence - absence indicator12. MV cable fixing support13. Optional: Pressure relief duct14. Optional: Control Box on top of the driving mechanism

CGMCOSMOS-2LV RMU (2SD&1CB type)

13

12

1

2

4

3

5

6

14

10

11

8

19

7

8

CGMCOSMOS-2LVFully gas-insulated ring main unit (RMU)

Up to 12 kV

Medium Voltage switchgear Secondary distribution networks

Safety•Personal,goodsandequipmentprotection against the effects of

internal arcs.•Livepartscapabilityofwithstanding 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.

•Cabletest: Easy frontal access and safe for the operator.•IP3XCprotectionrating of the cubicle assembly.• Voltage presence detection. Ormazabal’sekorVPIS indicator.• Front drivingmechanisms 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 arcCGMCOSMOS-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.

CA-326-EN-1306

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