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