Focus on Medium Voltage Medium Voltage Switchgear Secondary Distribution CGM.3 Fully Gas-Insulated Modular System Up to 38 kV IEEE Standards CGM.3 Fully Gas-Insulated Modular System Up to 38 kV MV Switchgear Secondary Distribution Networks General description Presentation Ormazabal’s CGM.3 system consists of a wide range of SF6 fully insulated compact, modular cubicles enabling the configuration of any electrical diagram in Medium Voltage Secondary Distribution networks up to 38 kV. CGM.3 is a highly safe, reliable and user-friendly assembly, capable of withstanding all environmental conditions. The performance of routine tests across the various phases of the assembly procedure and the use of the most innovative manufacturing techniques assure the highest level of quality in CGM.3 system, as reflected in its ISO 9001 certification. Areas of application Used for a wide variety of facilities, both public and private, its main applications are: • Utility transformer substations. • Infrastructures. • Private transformer substations. • Industrial facilities. • Switching substations. • Photovoltaic facilities. • Remote controlled substations. • Co-generation facilities. • Wind farms. Standards applied IEEE C37.74 IEEE Standard Requirements for Subsurface, Vault, and Pad-Mounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems Up to 38 kV IEEE C37.20.3 IEEE Standard for Metal-Enclosed Interrupter Switchgear IEEE 1247 Standard for Interrupter Switches for Alternating Current, Rated Above 1000 Volts IEEE C37.123 IEEE Guide to Specifications for Gas‑Insulated, Electric Power Substation Equipment IEEE Std C37.20.4 IEEE Standard for Indoor AC Switches (1 kV‑38 kV) for Use in Metal-Enclosed Switchgear IEEE C37.04 IEEE Standard Rating Structure for AC High‑Voltage Circuit Breakers IEEE C37.06 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Preferred Ratings and Related Required Capabilities IEEE Std C37.09 IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis IEEE Std C37.20.7 IEEE Guide for Testing Medium-Voltage Metal‑Enclosed Switchgear for Internal Arcing Faults IEC 60529 Degrees of protection provided by enclosures. IEC 61958 Voltage presence indicating systems. Focus on Medium Voltage www.ormazabal.com CGM.3 Fully Gas-Insulated Modular System Up to 38 kV MV Switchgear Secondary Distribution Networks Function types Modular units CGM.3-L CGM.3-P Feeder function Fuse protection function CGM.3-V CGM.3-S Circuit-breaker protection function Busbar switch function (grounding optional CGM.3-S-Pt) CGM.3-RC CGM.3-RB Cable rise function Busbar rise function (grounding optional CGM.3-RB-Pt) TECHNICAL CHARACTERISTICS CGM.3 L P V S S-Pt Rated voltage [kV] up to 38 Rated frequency [Hz] 50/60 [A] 600* RC RB RB-Pt Rated current general busbars and cubicle interconnection feeder output to transformer [A] 600* - 600* 600* 600* [A] - 200 - - - Rated short-time withstand current value tk = 1 s or 3 s [kA] 20** - 20** peak value [kA] 52.5/54.6 - 52.5/54.6 20** kA 1 s - 20** kA 1 s 33 (831) 33 (850) Arc fault qualification Dimensions Height [inches (mm)] Depth [inches (mm)] 69 (1745) Width [inches (mm)] 16 (418) 19 (480) 24 (600) 16 (418) 24 (600) 14 (367) Weight [pounds (kg)] 313 (142) 485 (220) 551 (250) 198 (135) 386 (175) 92.6 (42) 33 (850) 40 (1010) 33 (850) 33 (850) 33 (845) 14 (418) 304.2 (138) 348.2 (158) * Tests conducted at 630 A ** Tests conducted at 21 kA Focus on Medium Voltage www.ormazabal.com CGM.3 Fully Gas-Insulated Modular System Up to 38 kV MV Switchgear Secondary Distribution Networks Principal characteristics Protection and safety for people, goods and equipment against internal arc effects, proven through tests performed in accordance with standard. Capable of withstanding harsh environmental conditions (including flooding), long service life and absence of maintenance in live parts through full gas insulation and the use of screened connectors. Full modularity and future extensibility in both directions through Ormazabal’s patented ORMALINK connecting set. Flexibility to configure all types of diagram. Smaller size and lower weight, making handling and installation easier. Safe and simple operation through the use of user-friendly driving mechanisms, including interlocks as standard. Extra safety: incorporation of ekorVPIS, a light voltage presence indicator; and, optionally, ekorSAS, an acoustic alarm preventing earthing. Accessories and live testing as an option. Horizontal fuse holders with front access, protected within a gas tank. Easy cable connection through front plug-in or screwable terminals. Environmentally-friendly: • Use of highly recyclable materials. • Minimal gas volume per functional unit. • End-of-life product management. ÎÎ For other values, please consult our Technical and Commercial Department CONDITIONS OF SERVICE Installation Interior Maximum ambient temperature 104 ºF (+40 ºC *) Minimum ambient temperature 23 ºF (-5 ºC **) Minimum storage temperature -40 ºF (-40 ºC) Average maximum ambient temperature, measured over 24 h 95 ºF (+35 ºC) Average maximum relative humidity, measured over 24 h < 95% Average maximum steam pressure, measured over 24 h 22 mBar Average maximum steam pressure, measured over 1 month 18 mBar Maximum height above sea level Solar radiation Environmental air pollution (dust, salinity, etc.) Vibrations (seismicity) 6,500 feet (2000 m #) Negligible Insignificant Negligible * For special conditions, please consult our Technical and Commercial Department. ** Cubicles for 5 ºF (-15 ºC), -13 ºF (-25 ºC) and -22 ºF (-30 ºC) also available. # For special altitudes, please consult our Technical and Commercial Department. Focus on Medium Voltage www.ormazabal.com MV Switchgear Secondary Distribution Networks CGM.3 Fully Gas-Insulated Modular System Up to 38 kV Safety CGM.3 cubicles are designed to protect people and goods against the effects of internal arcs, complying with the criteria of standard: • Gas tank internal arc: 20* kA 0,5 s • Gas tank internal arc: 20* kA 1 s • IAC AFL Class / IEEE Std C37.20.7: 20* kA 1 s These cubicles have standard internal safety locks to enable a safe and reliable service. The cubicles in the CGM.3 system independently admit the locking of operations by padlocking the switch and the grounding switch. Capacity to withstand harsh environmental conditions. The breaking and making components are located inside a stainless steel, leak-proof and hermetically sealed tank. Gas tank The position of the switch is reliably displayed on the synoptic scheme, and validated by the kinematic chain test in accordance with the applicable standard. The full insulation with SF6 gas enables the unit to withstand harsh environmental conditions (damp, salinity, dust, contamination, etc.) and provides protection against indirect contact. The grounding prevention acoustic alarm unit ekorSAS is an acoustic signal that works in association with the grounding switch shaft and with the ekorVPIS voltage presence indicator. ekorVPIS is a self-powered indicator integrated in the cubicles which displays the presence of voltage in the phases through three permanent light signals, designed in accordance with the Standard. The phase comparator, ekorSPC can be supplied on request from Ormazabal. ekorSPC QUALITY OF ELECTRICAL SUPPLY The cubicles in the CGM.3 system contribute to improving electrical distribution in Medium Voltage networks up to 38 kV through: •Routine and traceability factory-testing in all equipments. •Interlocks between the switching and breaking components. •Visual display of the position of the switchgear in the synoptic diagram, validated by the kinematic chain test. •High anticorrosive levels, obtained using new materials. •Maintenance-free live parts. • Possibility of assembling accessories and performing tests under voltage. •Easy cable connection, with plug-in or screwed connectors. • Optional integration of protection, control and/or telemanagement units. ÎÎ * Tests performed at 21 kA Focus on Medium Voltage www.ormazabal.com Focus on Medium Voltage TECHNICAL-COMMERCIAL DEPARTMENT Tel.: 203 983 8176 ygi@ormazabal.com www.ormazabal.com Products, applications, solutions: xx Primary distribution switchgear xx Secondary distribution switchgear xx Automation, protection, remote control y communications in electrical networks xx Distribution transformers xx Low-Voltage Switchboards xx Transformer substations xx Medium-Voltage applications for renewable energies CA-330-US-1104