Velatia Ormazabal cgm.3 User manual

cgm.3 ENA type
Operation instructions
IG-235-EN, version 02; 17/06/2021
Medium voltage SF6 gas-insulated
switchgears up to 36 kV

CAUTION!
When medium-voltage equipment is operating, certain components are live, other parts may be in movement, and some may reach high
temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.
In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental
recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on the
following criteria:
· Elimination of hazards wherever possible.
· Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are
incorporated in the equipment.
· Communication about remaining risks to facilitate the design of operating procedures which prevent such risks, training
for the personnel in charge of the equipment, and the use of suitable personal protection equipment.
· Use of recyclable materials and establishment of procedures for the disposal of equipment and components so that once
the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the
environmental restrictions established by the competent authorities.
Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of the
IEC standard 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the
requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near electrical
installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other recommendations
of a more general nature which are applicable to the situation according to current legislation.
The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also on
general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically:
· The equipment must be handled and transported appropriately from the factory to the place of installation.
· All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment or
its essential components.
· Service conditions must be compatible with the equipment rating.
· The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable
operating and safety principles must be clearly understood.
·Maintenance should be performed properly, taking into account the actual service and environmental conditions in the
place of installation.
The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any
jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.
Guarantee
The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the event that
defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this equipment and its
repair by the user shall constitute a violation of the guarantee.
Registered Trademarks and Copyrights
All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual
belongs to the manufacturer.
In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject to
change without prior notification.
These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal.

3
ÍndexOperation instructions
cgm.3 ENA type
IG-235-EN version 02
ÍNDEX
1 Description and main characteristics 4
1.1 Switchgear elements . . . . . . . . . . . . . . . . . . . . 4
1.1.1 Voltage presence indicator . . . . . . . . . . . . . . . 7
1.1.2 Name plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Mechanical characteristics . . . . . . . . . . . . . . . 8
2 Recommended sequence of operations 10
2.1 Checking voltage presence and
phase balance . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.1 ekor.spc phase comparator . . . . . . . . . . . . . . 10
2.2 Mechanism operating handles . . . . . . . . . . . 11
2.2.1 Switch - disconnector driving
mechanism handle (B) . . . . . . . . . . . . . . . . . 11
2.2.2 Spring charging handle for circuit
breaker driving mechanisms . . . . . . . . . . . . . 11
2.3 cgm.3-l switchgear . . . . . . . . . . . . . . . . . . . . 12
2.3.1 Opening operation from
the earthing position . . . . . . . . . . . . . . . . . . . 12
2.3.2 Switch closing operation from
the open position . . . . . . . . . . . . . . . . . . . . . . 12
2.3.3 Opening operation from the switch -
disconnector closed position . . . . . . . . . . . . . 12
2.3.4 Earthing operation from the open position . . 12
2.3.5 Cable test . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.4 cgm.3-p switchgear . . . . . . . . . . . . . . . . . . . . 13
2.4.1 Opening operation from
the earthing position . . . . . . . . . . . . . . . . . . . 13
2.4.2 Switch - disconnector closing operation
from the open position (using the BR-A
driving mechanism) . . . . . . . . . . . . . . . . . . . . 13
2.4.3 Opening operation from the switch -
disconnector closed position . . . . . . . . . . . . . 13
2.4.4 Earthing operation from the open position . . 13
2.4.5 Selection of recommended fuses . . . . . . . . . 14
2.4.6 Fuse replacement sequence . . . . . . . . . . . . . 15
2.5 cgm.3-rb switchgear with earthing . . . . . . . . . 17
2.5.1 Opening operation from
the earthing position . . . . . . . . . . . . . . . . . . . 17
2.5.2 Earthing operation from
the open position . . . . . . . . . . . . . . . . . . . . . . 17
2.6 cgm.3-v switchgear with driving mechanism
A(M)V-EF and RA(M)V-EF (3G) . . . . . . . . . . 17
2.6.1 Opening operation from
the earthing position . . . . . . . . . . . . . . . . . . . 17
2.6.2 Closing operation from the open position . . . 18
2.6.3 Opening operation from
the closed position . . . . . . . . . . . . . . . . . . . . 19
2.6.4 Earthing operation from the open position . . 20
2.7 cgm.3-v switchgear with driving
mechanism A(M)V and RA(M)V (3G) . . . . . . 21
2.7.1 Opening operation from
the earthing position . . . . . . . . . . . . . . . . . . . 21
2.7.2 Closing operation from the open position . . . 22
2.7.3 Opening operation from
the closed position . . . . . . . . . . . . . . . . . . . . 23
2.7.4 Earthing operation from the open position . . 24
3 Safety locking facilities and
interlocking 26
3.1 Mechanical interlocking . . . . . . . . . . . . . . . . . 26
3.2 Safety locking facilities . . . . . . . . . . . . . . . . .26
3.2.1 Locking with a padlock . . . . . . . . . . . . . . . . .26
3.2.2 Locking with a key lock (optional) . . . . . . . . . 26
4 Maintenance 27
4.1 Voltage presence indicator test . . . . . . . . . . . 27
4.2 Specific maintenance for the
cgm.3-v switchgear . . . . . . . . . . . . . . . . . . . .27
5 Additional information 28
5.1 Current transformers arrangements . . . . . . . 28
5.2 Spares and accessories . . . . . . . . . . . . . . . . 28
5.3 Environmental information . . . . . . . . . . . . . . . 29
The instructions for the transport, storage and
installation of the cgm.3 ENA type switchgears are
included in the Ormazabal's MO-091 document.

4 Description and main characteristics Operation instructions
cgm.3 ENA type
IG-235-EN version 02
1 Description and main characteristics
cgm.3 ENA type range is made up of a range of fully gas
insulated modular switchgears, which allow the
configuration of different medium voltage (MV) secondary
electrical distribution diagrams up to 36 kV.
This switchgear range has been designed to meet the
requirements of the following standards:
1.1 Switchgear elements
Each switchgear is made up of a series of independent
compartments:
Fig. 1.1: Main components of modular cgm.3ENA type
switchgears
Gas tank: sealed compartment which houses the busbar
and the switching and breaking elements, where the
insulating medium is gas.
The gas tank has a membrane to allow gases to escape in
the event of an internal arc.
Fig. 1.2: Gas tank
Units
cgm.3-l Switch - disconnector switchgear
cgm.3-p Fuse protection switchgear
cgm.3-v Circuit breaker switchgear
cgm.3-rb Busbar rise switchgear
Standard Description
IEC 62271-1
Common specifications for high-
voltage switchgear and controlgear
standards.
IEC 62271-200
Alternating current metal-enclosed
switchgear and controlgear for rated
voltages above 1 kV and up to and
including 52 kV.
IEC 62271-102 Alternating current disconnectors and
earthing switches.
IEC 62271-103
High voltage switches for rated
voltages above 1 kV up to and
including 52 kV.
IEC 62271-105 Alternating current switch-fuse
combinations.
IEC 62271-100 High voltage alternating current
circuit breakers.
IEC 60529 Degrees of protection provided by
enclosures.
IEC 62271-206 /
IEC 61243-5 Voltage presence indicating systems.
ENATS 41-36
Distribution switchgear for service up
to 36 kV (cable and overhead
conductor connected).
1Gas tank
2Driving mechanism compartment
3Base:
3a Cable compartment
3b Gas relief compartment

5
Description and main characteristicsOperation instructions
cgm.3 ENA type
IG-235-EN version 02
Each gas tank has a manometer for checking the gas
pressure, which can easily be seen from outside the
switchgear. The manometer scale is divided into different
colours: red, grey (shows low gas pressure for other
temperature bands than 20 ºC) and green. For safe
operation, the manometer needle must be in the green
zone of the corresponding temperature band.
Fig. 1.3: Manometer
Includes a padlockable coupling device which allows the
driving mechanism to be replaced regardless of the
position of the switch-disconnector: closed, open or
earthed.
Fig. 1.4: Device for coupling the switch
Switch-disconnector and earthing switch: This has
three positions: closed, opened or earthed.
This switch is operated using driving mechanisms with two
different manual actuation shafts: one for the switch
(switching between the Closed and Open Positions); and
the other for the earthing switch (which switches between
the Open and Earthing positions) on the feeder cables, and
in the case of fuse protection switchgears, on the fuse
holder clamps.
These elements are operated independently so that their
actuation speed does not depend on the speed of the
manual operation.
Vacuum circuit breaker: The cgm.3-v switchgear's circuit
breaker uses vacuum switching technology.
The circuit breaker is manually actuated by means of the
push-button on the front of the switchgear. For manual
operation, springs must be charged with the corresponding
mechanism operation handle.
The cgm.3-v circuit breaker switchgear comes standard
equipped with a switch-disconnector and an earthing
switch for ensuring the isolating distance.
This element is operated using a specific handle.
1) Driving mechanism compartment: This is the
compartment in which the switch-disconnector or
the circuit breaker is actuated, depending on the
type of switchgear. The mimic diagram for the
Medium Voltage main circuit is displayed on the
cover of this compartment.
The mimic diagram includes all the position indicators for
the actuators.
Elements in the driving mechanism area of modular
switchgears:
cgm.3-l
Fig. 1.5: Mimic diagram of cgm.3-l type switchgear
AEarthing switch actuation shaft
BSwitch-disconnector actuation shaft (B and BM driving
mechanisms)
CSwitch and earthing switch position indicator
DActuation shaft access lever
Fekor.vpis voltage indicator

6 Description and main characteristics Operation instructions
cgm.3 ENA type
IG-235-EN version 02
cgm.3-p
Fig. 1.6: Mimic diagram of cgm.3-p type switchgear
cgm.3-v
Fig. 1.7: Mimic diagram of cgm.3-v A(M)V/RA(M)V (3G)
type switchgear
cgm.3-rb
Fig. 1.8: Mimic diagram of cgm.3-rb type switchgear with
earthing
AEarthing switch actuation shaft
BSimultaneous switch - closing and spring
charging actuation shaft (BR-A driving mechanism)
CSwitch and earthing switch position indicator
DActuation shaft access lever
Fekor.vpis voltage indicator
GSwitch opening button (BR-A driving mechanism)
HFuse status indicator
NSpring loading indicator
AEarthing switch actuation shaft
BSwitch-disconnector actuation shaft (B and BM driving
mechanisms)
CSwitch and earthing switch position indicator
DActuation shaft access lever
Fekor.vpis voltage indicator
IOperation counter
JSpring charging shaft
KCircuit breaker opening
LCircuit breaker closing
MCircuit breaker position indicator
NSpring loading indicator
AEarthing switch actuation shaft
CEarthing switch position indicator
DActuation shaft access lever
Fekor.vpis voltage indicator

7
Description and main characteristicsOperation instructions
cgm.3 ENA type
IG-235-EN version 02
Fig. 1.9: Mimic diagram of cgm.3-rb type switchgear
without earthing
2) Base: Made up of the cable compartment (3a) and
the gas relief compartment (3b), see Fig. 1.1: Main
components of modular cgm.3 ENA type
switchgears. The first is located in the lower front
part of the switchgear and has a cover interlocked
with the unit's earth connection, which allows front
access to the medium voltage cables.
The gas relief compartment is located in the lower rear
section of the switchgear. In the event of an internal arc,
the gases produced are deflected downwards and to the
rear.
Alternativelly, the gases could be diverted upwards through
a rear gas relief duct.
Fig. 1.10: Cable compartment
1.1.1 Voltage presence indicator
Ormazabal offers two options for the voltage presence
indicator:
►ekor.vpis unit for indicating the presence of voltage
has been designed in accordance with the
IEC 62271-206 standard. Therefore, the “presence
of voltage” indication appears when the phase-earth
voltage is greater or equal to 45% of the rated
voltage and does not appear when the phase-earth
voltage is less than 10% of the rated voltage.
This unit provide a clear visual indication to the user, and
do not require an auxiliary power supply to operate.
For each of the three phases, the presence of voltage is
indicated by intermittent flashing of the indicators.
The voltage detection unit has the following indicators:
Fig. 1.11: Unit to indicate the presence of voltage
The purpose of the test points for the three phases and
earth is to make it easier to check the phase balance
between switchgears. Ormazabal's specific phase
comparator ekor.spc can be used to do this.
Fekor.vpis voltage indicator
1L1, L2 L3
Display each of the indicator phases
The numbering corresponds to the order of the phases,
from left to right, seen from the front of the switchgear.
Each phase has a test point for checking the phase
balance between switchgears.
2Voltage presence indicator
A flashing light indicates the presence of voltage in that
phase.
3Phase test points
Each phase has a test point for checking the phase
balance between switchgears.
4Earth test point
This is only used for comparing the phases.
See section 2.1 Checking voltage presence and
phase balance.
CAUTION
Alternative methods should be used to check for the
absence of voltage.

8 Description and main characteristics Operation instructions
cgm.3 ENA type
IG-235-EN version 02
1.1.2 Name plate
Every switchgear includes a name plate, with some of the
following values:
Fig. 1.12: Name plate in cgm.3-l switchgear
(*) In the event of a problem or non-conformity, please
give this number to Ormazabal.
1.2 Mechanical characteristics
The dimensions and weights of the cgm.3 switchgear
system are represented in the following table.
Fig. 1.13: cgm.3dimensions
Name plate
No. Switchgear serial number(*)
Type Ormazabal switchgear system
Identifier Switchgear model
Standard Regulations applied to the equipment
Denom. Equipment name
UrEquipment rated voltage (kV)
UpLightning impulse withstand voltage (kV)
UdPower frequency withstand voltage (kV)
frEquipment rated frequency (Hz)
IrEquipment rated current (A)
Manual of
instructions
Manual of General Instructions (IG)
corresponding to the system
Class Driving mechanism class according to
IEC 62272-103
NNumber of mainly active load breaking
operations
Ik / IpShort-time withstand current/Short-time
withstand peak value
tkShort-time withstand current time
Pre Gas pressure inside the gas tank (MPa)
Pme Minimum operating gas pressure (MPa)
SF6Weight of insulating fluid (g)
Year Year of manufacture
TC Thermal class
IAC Internal Arc Classification

9
Description and main characteristicsOperation instructions
cgm.3 ENA type
IG-235-EN version 02
Module Width (A)
[mm]
Depth (F)
[mm]
Height[6] (H)
[mm]
Height
bushing (G)
[mm]
Weight[4]
[kg]
l
Internal arc up to
16 kA - 1 s [2] 418 850 [1] 1745 1042
142
Internal arc [5] up to
21 kA - 1 s [3] 162
p
Internal arc up to
16 kA - 1 s [2] 480 1010 1745 525
220
Internal arc [5] up to
21 kA - 1 s [3] 230
v
Internal arc up to
16 kA - 1 s [2] 600 850 1745 695
250
Internal arc [5] up to
21 kA - 1 s [3] 255
rb
rb with earthing
Internal arc up to
16 kA - 1 s [2] 418 850 [1] 1745 1042
138
Internal arc up to
21 kA - 1 s [3] 158
[1] Switchgear with double cable: 930 mm.
[2] 16 kA - 1 s in gas tank and 5 kA - 1 s in cable compartment.
[3] 21 kA - 1 s AFL/AFLR upwards exhaust with rear channel.
[4] Weights with rear gas relief duct:
* l+v configuration: 554 kg
* l+l+v configuration: 729 kg
[5] The IAC category means that all the medium voltage switchgear compartments are protected against internal arcs.
[6] Height with rear gas relief duct: 2043 mm

10 Recommended sequence of operations Operation instructions
cgm.3 ENA type
IG-235-EN version 02
2 Recommended sequence of operations
2.1 Checking voltage presence and
phase balance
2.1.1 ekor.spc phase comparator
Ormazabal offer the ekor.spc unit for this purpose.
Firstly, connect the red cables of the ekor.spc unit to the
corresponding phase test points on the voltage indication
units, and the black cable to the earth test point. This
operation should be repeated for all the phases: L1, L2 and
L3
Fig. 2.1: ekor.spc unit
Fig. 2.2: Connecting the ekor.spc unit
Comparison of balanced phases
Fig. 2.3: There is NO indication on the comparator
Comparison of unbalanced phases
Fig. 2.4: YES, there is indication on the comparator
CAUTION
Before carrying out any operation when the
switchgear is energised, we recommend checking
the gas pressure, using the manometer.
In case of low gas pressure, contact to nearest
Ormazabal office.
Checking that the medium voltage cables are
correctly connected to the feeder switchgears must
be done. Comparison devices which comply with
the IEC 62271-206 standard may be used.
See section 1.1.1 Voltage presence indicator of
this operation instructions manual.