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CBGS 0

CBGS 0. -. “Simplicity, reliability, safety, at low cost for indoor substations up to 36 kV ”. Index. General characteristics Field of application Gis technology Advantages of CBGS-0 References CBGS-0 cubicles: description. Internal ARC. 20kA-0,5s / 31,5kA-1s.

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CBGS 0

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  1. CBGS 0 - “Simplicity, reliability, safety, at low costfor indoor substations up to 36 kV”

  2. Index • General characteristics • Field of application • Gis technology • Advantages of CBGS-0 • References • CBGS-0 cubicles: description

  3. Internal ARC 20kA-0,5s / 31,5kA-1s General Characteristics • Metal enclosed GIS (SF6 insulated) CONFIGURATION Shot Circuit Current Configuration Rat.Voltage Rated Current Single Busbar 24 kV – 36 kV 1250 / 1600 A 25 / 31,5 kA

  4. Field Of Aplication • Primary distribution substations • Utilities • Windfarms • Airports • Traction substations • Heavy load industries • Etc.....

  5. Main Technical Characteristics • Main differences with AIS (air insulated switchgear): • Circuit Breaker: • GIS: fixed • AIS: withdrawable • Dimensions (isolating distances): • GIS: smaller • AIS: bigger • Access to the MV parts: • GIS: no possible (insensitivity to atmospheric conditions) • AIS: possible • GIS maximizes: • Service Continuity • Operation Security • Space Savings

  6. Advantages Service continuity Maximun security Minimun cost Simple design

  7. Service Continuity • Extended endurance (mechanical & electrical): • Lower distances/dimensions due to SF6 insulation • Minimum Energy Required • Insensitivity to ambient conditions: • Sealed for life SF6 compartment: Routine tested • Service live >30 years • Minimum maintenance needed High reliability => extended service life

  8. Maximum Savety • No access to MV parts: “Safe to Touch” • Secure access to cables: • Front access • Voltage Presence Indication • Avoided without earthing • Front access to all mechanisms and LV compartment • False manoeuvres are avoided (interlockings): • Impossible to act on the disc. with CB in closed position • To finish up disc. manoeuvres is a must • Position indicators are totally reliable (IEC) • Internal arc tested ...31,5 kA/1s • Minimum fire risk

  9. Simplicity – Installation • No need of specially qualified staff for installation: • No SF6 handling on site • Busbar installation: similar to cable connectors • Cable connectors installation: similar to well known RMU Simplicity => Security Simplicity => Reliability => Continuity

  10. Simplicity – Operation • Synoptical indication: • Front of the panel • Easy to read • Totally reliable • Simple and secure operation • Interlockings to avoid false manoeuvres Simplicity => Security Simplicity => Reliability => Continuity

  11. Simplicity – Mainteineability & Repairability • Maintainability: • Free of maintenance in MV parts • Just low maintenance is recommended for operating mechanisms • Operating mechanisms are easily accessible from the front • Reparability: • In case of mayor failure: • Quick change of one cubicle (<4 hours) • Service is quickly restablished Simplicity => Security Simplicity => Reliability => Continuity

  12. 600 600 1250 1250 1950 2300 1000 1000 Minimum Cost – Space Savings CBGS-0 24 kV 0,75 m2 AIS cubicle 24 kV 1,95 m2 CBGS-0 36 kV 0,75 m2 AIS cubicle 36 kV 2,30 m2 • Additional space savings: • Only front access required • Possible installation close to the back wall

  13. Minimum Cost – Summary • Direct cost of each cubicle: Higher Reliability / Continuity Maximum Safety Space and Civil Works Savings Savings in Maintenance Works Savings in Installation Works Maximum value for user

  14. References • CBGS: More than 5000 units already installed • Some end users: • Utilities: Endesa, Iberdrola, Vattenfall,… • Wind: Gamesa, Vestas,… • Railways: RENFE, METRO BCN, MAD, BIO,… • Airports: AENA BCN, MAD, BIO, TNF,... • Industry: Renault, Mercedes Benz,…

  15. Description • Architecture: • Busbar compartment • Isolating and/or Breaking compartment: • Circuit Breaker • Disconnector • Load Break Switch • Fuse-Switch • Cable compartment • Cubicle

  16. Achitecture Low voltage comp. Busbar Isolating and/or breaking Power cable comp.

  17. Achitecture • LV Compartment: • 1 - LV compartment • 2 - LV cable tray • 3 - Protection relay • Busbar Compartment: • 4 - Busbar system • 5 - Busbar compartment enclosure • 6 - Current transformers • 7 - Voltage transformers 7 2 5 1 6 3 4

  18. Achitecture • Isolating and Breaking Sw Comp.: • 8 - Sealed for life tank – SF6 insulated • 9 - Gas exhausting flap • 10 - 3 Position disconnector • 11 - Circuit breaker • 12 - Operating mechanism of the disconnector • 13 - Operating mechanism of the CB • Cable Compartment: • 14 - Cable connection bushings • 15 - Power cable connectors • 16 - VT connection cable • 17 - Current transformers • 18 - Voltage transformers • 19 - Front access door 8 10 12 13 11 9 18 14 16 17 19 15

  19. Busbar Compartment • Insulation system: • Fase by fase • Solid • Screened • Earthed • “Safe to Touch” • Possibility of installing VT-S and CT-S: • Directly on busbar system • No need of specific measuring cubicle

  20. Breaking And Insulating Switchgear Compartment • Tank: • Stainless steel • Sealed for life • SF6 low relative pressure (0,3 bars) • Operating mechanisms: • Accessible from front • Out of SF6 atmosphere • Possible configurations: • 3 position disconnector + circuit breaker • 3 position disconnector • Load break switch - disconnector + fuses • Load - seccionador

  21. Circuit Breaker • Breaking medium: SF6 • Separated poles • Low maintenance operating mechanism • Totally interlocked with the disconnector: no false manoeuvres • Earthing of the incoming circuit: making capacity

  22. 3 Position Disconnector • 3 positions: closed-open-earth • Single operating axle • Separated operating shafts (handles): • Open-closed • Open-earth • Totally interlocked with the circuit breaker: no false manoeuvres • Earthing of the incoming circuit: trough CB (making capacity)

  23. Load Break Switch-disconnector • 3 positions: closed-open-earthed • Separated operating shafts (handles): • Open-closed • Open-earth position • Breaking capacity: up to 630 A • Installations possibilities: alone or associated with fuses

  24. Cable Compartment • Secure access: • From the front • Totally interlocked with the earthing manoeuvre • Standard cable connection bushing: • Type C according to EN 50181 • Standard cable connectors • Up to 3 power cables + VT by fase • Possibilities: • Ring type CT-s on the bushings • Ring type CT-s on the cable (only 1 cable configuration) • VT-s connected by means of isolated MV cable

  25. Current And Voltage Transformers • CT-S: • Types: • Ring type for busbar compartment • Ring type for cable compartment • Several burden and accuracies (consult) • VT-S: • Types: • Connected by means of MV cable • Connected directly to busbar system • Several burden and accuracies (consult)

  26. Cubicle Types CB+disconn. Rising Coupling LBS-disconn. Disconnerctor Aux. services

  27. ¿Any question or comment? Thank you very much

  28. CBGS 0 - “Simplicity, reliability, safety, at low costfor indoor substations up to 36 kV”

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