Ormazabal CMS-17 Instruction manual

General Instructions
IG-178-GB
version 01
Secondary Distribution
Switchgear
Primary Distribution
Switchgear Protection and Automation Distribution Transformers
Transformer
Substations Low Voltage
Boards
LIB
11.08.2011
CMS-17
SWITCHING AND BREAKING SUBSTATION

Legal Deposit: BI-2226/2010
CAUTION!
When MV 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 useful 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
forthcoming 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’s Technical -
Commercial Department.

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GENERAL INSTRUCTIONS FOR
CMS-17
SWITCHING AND BREAKING SUBSTATION
IG-178-GB
version 01
11.08.2011
CONTENTS
1.DESCRIPTION AND MAIN CHARACTERISTICS ............................................................. 4
1.1.INTERIOR SWITCHGEAR .......................................................................................... 5
1.1.1.Technical Characteristics: CGMCOSMOS system.................................................. 6
1.2.PREFABRICATED ENCLOSURE............................................................................... 7
1.3.MECHANICAL CHARACTERISTICS.......................................................................... 8
1.3.1.Concrete Enclosure................................................................................................. 8
1.3.2.Electrical equipment................................................................................................ 9
1.3.3.Concrete Enclosure and Electrical Equipment........................................................ 9
2.TRANSPORT.................................................................................................................... 10
2.1.LIFTING METHODS.................................................................................................. 10
2.2.ACCESS.................................................................................................................... 11
2.3.OVERLAND TRANSPORT........................................................................................ 11
2.4.SEA TRANSPORT .................................................................................................... 12
2.5.DELIVERY CONDITIONS.......................................................................................... 12
3.INSTALLATION................................................................................................................ 13
3.1.LOCATION ................................................................................................................ 13
3.2.PLANNING ................................................................................................................ 13
3.3.EXCAVATION DIMENSIONS.................................................................................... 14
3.4.LEVELLING PROCESS ............................................................................................ 15
3.5.EARTH CONNECTION.............................................................................................. 15
3.5.1.Protective Earth Connection.................................................................................. 15
3.5.2.External Earthing Circuit........................................................................................ 16
3.6.MV CABLE ACCESS ................................................................................................ 17
3.7.MV CABLE CONNECTIONS..................................................................................... 18
4.SEQUENCE OF OPERATIONS OF THE SWITCHGEAR ............................................... 18
4.1.OPERATING THE MV SWITCHGEAR...................................................................... 18
5.MAINTENANCE................................................................................................................ 18
5.1.REPLACING THE ELECTRICAL EQUIPMENT........................................................ 19
6.ADDITIONAL INFORMATION.......................................................................................... 23
6.1.SPARES AND ACCESSORIES ................................................................................ 23

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GENERAL INSTRUCTIONS FOR
CMS-17
SWITCHING AND BREAKING SUBSTATION
1. DESCRIPTION AND MAIN CHARACTERISTICS
Ormazabal's CMS-17 externally operated Switching and Breaking Substation has been
designed in accordance with standard EN 62271-202, to be used in public electrical
distribution networks of up to 24 kV.
1. Interior switchgear
1.1. MV switchgear (CGMCOSMOS system)
2. Prefabricated Concrete Enclosure
2.1. Concrete monoblock enclosure
2.2. Removable cover
2.3. Access door to the MV switchgear
2.4. Bottom entry and exit of MV cables
2.5. Side exit of MV cables
Figure 1.1: Main components of CM
S
-
17
1.1
2.3
2.3
2.1 2.5
2.2
2.4
2.5

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GENERAL INSTRUCTIONS FOR
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IG-178-GB
version 01
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1.1. INTERIOR SWITCHGEAR
The electrical equipment of the CMS-17 Switching and Breaking Substation is located inside
and anchored to the enclosure and has the following types of configuration:
a) Switching and Breaking Substation, made up of the following components:
- Switchgear unit formed by up to 4 MV feeder functions completely insulated in
SF6, with an insulation voltage of 24 kV.
b) Switching and Breaking Substation with Protection units, made up of the following
components:
- Switchgear unit formed by 2 MV feeder functions completely insulated in SF6, with
up to two fuse protection units.
The maximum single-wire diagrams available for the CMS-17 Switching and Breaking
Substation are shown below:
Figure 1.2: CMS-17 substation 4L single-wire diagram Figure 1.3: CMS-17 substation 2LP+P single-wire
diagram

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GENERAL INSTRUCTIONS FOR
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1.1.1. Technical Characteristics: CGMCOSMOS system
MV Switchgear Unit CGMCOSMOS
Insulation SF6
Rated voltage kV 24
kV Power freq.: 50/60
Insulation level kV Lightning impulse: 125/145
Busbar (IEC 62271-200):
Rated current A 400/630
Rated short-time withstand current kA 16 eff. (1 s)
Peak value kA 40
Switch-disconnector (IEC 60265-1):
Type Rotation (category E3)
Rated current A 400/630
Rated short-time withstand current kA 16 eff. (1 s)
Peak value kA 40
Short-circuit making capacity kA 16 / 40
Nº of short-circuit closing operations CO/CO 5
Earthing Switch (IEC 62271-102)
Rated short-time withstand current kA 16 eff. (1 s)
Peak value kA 40
Short-circuit making capacity kA 16 / 40 (category E2)
Nº of short-circuit closing operations CO/CO 5
Fuse Protection Function
Rated current A 200
Short-time current (main circuit) kA 16 (1 s)
Main switch making capacity kA 40
Opening capacity Co/Co kA 16
Nº of short-circuit closing operations CO/CO 5

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GENERAL INSTRUCTIONS FOR
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SWITCHING AND BREAKING SUBSTATION
IG-178-GB
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1.2. PREFABRICATED ENCLOSURE
Made up of:
Concrete monoblock prefabricated construction with a door opening measuring
1420 mm high and 1720 mm wide.
Prefabricated removable concrete cover.
Double door measuring 1420 x 900 mm each, with a system enabling it to be fixed in
place at 90º and 180º. It has a document holder with documentation relating to the
Switching and Breaking Substation.
Cable entry and exit holes, four at the bottom of the enclosure, with a diameter of
174 mm. Additionally, the substation also has 400 x 132 mm cable exit holes on both
sides of the enclosure that allow servitude access to adjoining plots.
Connection point for the protective earth of the electrical equipment as well as for the
enclosure, located on the inside of the enclosure's left side wall.
Concrete floor and fixing rails for assembling the cubicle layout.
Frontal ventilation through the doors in compliance with IP23D protection rating,
according to IEC 60529.
Figure 1.4: Prefabricated concrete enclosure

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GENERAL INSTRUCTIONS FOR
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1.3. MECHANICAL CHARACTERISTICS
The dimensions and weights of the CMS-17 Switching and Breaking Substation are given
below.
1.3.1. Concrete Enclosure
Dimensions
Total 2080
Height Visible mm 1600
Width mm 2170
Depth mm 1310
Figure 1.5: Enclosure dimensions
Weight
Body kg 2180
Cover kg 515
Floor kg 440
Total weight *kg 3135
(*) Electrical equipment not included.
Dimensions in millimetres
1310
2170
480
1600
2080

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1.3.2. Electrical equipment
Dimensions
4L 2L2P
Height mm 1300
Width mm 1460
(4 x 365 mm) 1670 (2 x 365 mm + 2 x 470 mm)
Depth mm 735
Weight
4L 2L2P
Weight kg 344
(4 x 86 kg) 430 (2 x 86 kg + 2 x 129 kg)
1.3.3. Concrete Enclosure and Electrical Equipment
4L 2L2P
Maximum weight kg 3500 3600

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GENERAL INSTRUCTIONS FOR
CMS-17
SWITCHING AND BREAKING SUBSTATION
2. TRANSPORT
2.1. LIFTING METHODS
The CMS-17 Switching and Breaking Substation has 4 DEHA-type inserts (6000-2-0170) which
enable it to be handled using the proper lifting beam, slings and hooks in order to guarantee a
hoisting as balanced as possible.
Figure 2.1: Correct coupling method using DEHA hooks
Figure 2.2: Placement of the lifting beam used for hoisting the CM
S
-
17
Dimensions in millimetres
4700
1900
2800

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GENERAL INSTRUCTIONS FOR
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2.2. ACCESS
The site must be visited in advance to check if vehicles can have access and if there is
sufficient space for the unloading and assembly operations, taking into account the distances
to overhead lines, slopes, etc.
2.3. OVERLAND TRANSPORT
Transportation should be carried out using a truck. The CMS-17 Switching and Breaking
Substation electrical equipment is supplied screwed onto the rails located on the floor of the
concrete enclosure for transportation.
The concrete enclosure is lashed using ropes. These are hooked into the DEHA hooks in the
building, thereby ensuring stability during transportation. To avoid any movement of the roof
in respect to the body, slings should be attached above the cover.
Figure 2.3: Land transport of CM
S
-
17

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GENERAL INSTRUCTIONS FOR
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CAUTION:
In the event that any anomaly is found, please contact Ormazabal's Technical-
Commercial Department immediately.
2.4. SEA TRANSPORT
The transportation should be carried out using "open top" or "flat-rack" containers.
To eliminate the risk of water intake, protect the front ventilation outlets located in the doors
with an elastic plastic band rolled around the perimeter several times.
Attach 2 planks of 1500 x 150 x 20 mm to support the CMS-17 in the container.
Once positioned inside the container, attach a 100 x 100 x 10 mm and 100 mm long square
to each corner of the building. They must be welded to the floor of the container, in order to
avoid any movement during transportation. Lastly, place two slings transversally over the
enclosure, after having placed corner pieces below the slings in order to protect the
enclosure from possibly rubbing against the slings.
2.5. DELIVERY CONDITIONS
The CMS-17 Switching and Breaking Substation is supplied fully assembled and ready for
connection to the MV supply.
Upon receipt of the CMS-17 substation, carefully check the following:
That the characteristics of the different components that make up the electrical
equipment that are listed in the corresponding name plates coincide with the order.
The general condition of the assembly.
Figure 2.4: Sea transport of CM
S
-
17

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GENERAL INSTRUCTIONS FOR
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SWITCHING AND BREAKING SUBSTATION
IG-178-GB
version 01
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3. INSTALLATION
3.1. LOCATION
The site location should be precisely defined, indicating the levels of alignment and height of
the possible reference points, such as: roads, kerbs, milestones, fences, pavilions, pylons,
etc.
3.2. PLANNING
The coordination of the transport and the crane must be scheduled or, if this is not possible,
a tow-truck suitable for the weight of the CMS-17 Switching and Breaking Substation[1].
The existence of any circumstance or object that could impede or obstruct the smooth operation
of the installation must be indicated (posts, cables, ditches, walls, pipelines, etc.), marking their
positions on the drawing with the corresponding measurements.
Due to technical reasons concerning the protection and safety of people and property, the
conditions of the installation site and its design must be in accordance with the applicable
regulations on High Voltage.
Similarly, please take into account the assembly instructions provided by the Electric Utility,
which is aware of the regulations and also takes into account any particularities in the
electrical network to which the Switching and Breaking Substation is to be connected.
[1]See sections 1.3 Mechanical Characteristics and 2.1.Lifting Methods.

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GENERAL INSTRUCTIONS FOR
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3.3. EXCAVATION DIMENSIONS
For the installation of the CMS-17 Switching and Breaking Substation, an excavation
including an earthing loop is necessary.
In order to carry this out, it is recommended that the minimum construction worksite safety and
health Regulations be observed. Among others:
Before beginning to open, carry out a preliminary study of the ground for the purpose of
knowing its stability and the possible existence of conduits.
Avoid accumulating excavated material and equipment next to the edge of the
excavation, taking the necessary precautions to prevent the walls from caving in and
materials falling inside.
As a general rule, maintain a 3000 mm area around the excavation free of materials and
vehicle traffic.
In the case of rain and puddles, carefully inspect the excavation using qualified
technicians before resuming the work. Carry out immediate pumping out of water that
may be present inside the excavation in order to prevent the stability of the slope from
being altered.
The operators that work inside the excavation must be properly trained and informed and
must use a safety hat as well as the appropriate protective clothing for each specific
hazard.
Ensure that the building is not buried over the reference line marked on the walls of the
concrete enclosure. The maximum burying height is 480 mm measured from the base.
The measurements below must be adapted in each case, depending on the solution adopted
for the earthing network according to the earthing diagram.
3.1: Excavation dimensions
Dimensions in millimetres
1770
2550
480
100

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3.4. LEVELLING PROCESS
For the correct assembly of the enclosure, the ground levelling is important.
The following equipment is recommended for correct levelling:
A spirit level
A square-end spade
Levelling tools
A 100 mm thick compacted and levelled layer of sand is required at the bottom of the
excavation in order to prevent differential settlements.
The installation operation consists of positioning the CMS-17 in the excavation made for this
purpose and of connecting the MV cables, along with the external earthing network.
3.5. EARTH CONNECTION
The CMS-17 Switching and Breaking Substation has an internal earthing circuit to facilitate
the connection of the different elements to the earthing network external to the Switching and
Breaking Substation.
3.5.1. Protective Earth Connection
For the correct connection of the protective earth (metallic parts), the enclosure of the
CMS-17 Switching and Breaking Substation has a switching box located on the inside of the
left side wall, which is accessible from the outside through the doors.
The MV switchgear unit earthing is routed to this connection point, which connects all the
earth connections of all the concrete enclosure's electrical equipment.
CAUTION:
Consult Ormazabal’s Technical-Commercial Department in the event of installation on a
slo
p
e.

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GENERAL INSTRUCTIONS FOR
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3.5.2. External Earthing Circuit
The installation project must include a section corresponding to the earthing installation
(check the Utility’s standard project), as well as the justification of its size. The requirements
for this type of installation are established in the regulations governing Earth Connection
Installations.
Below is a recommended method for the installation of the earthing network from the
operator safety perspective:
Create an equipotential surface for both the switchgear and the operation area.
Each project should include the study of the most suitable earthing diagram.
The copper braid cross-section, the terminations' contact surface and the tightening
torques must be suitable for a fault current delimited by network protections. It is
recommended an external protective earthing network of bare copper wire with a
minimum cross-section of 50 mm2.
It is recommended that the external earthing circuit is installed simultaneously. To this
end, it is recommended to check the Switching and Breaking Substation installation
standard project available at the Electric Utility that provides the service and is
responsible for maintaining safety in the worksite earthing installation.
Adequate earthing measures around the Transformer Substation must be provided to
prevent dangerous touch and step voltages.
The recommended tightening torque for electrical connections in the earthing network
is shown in the following table:
Metric Tightening Torque [Nm]
8.8 Steel A2 Stainless
M8 21
M10 38
M12 60

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3.6. MV CABLE ACCESS
The CMS-17 Switching and Breaking Substation has 4 holes of 174 mm in diameter at the
bottom part. Additionally it has 2 exits, one on either side, which allow access to adjoining
plots.
The bottom holes allow to lay cables at distances of less than 900 mm from level 0, even
underneath the enclosure itself.
To open a hole, simply knock it inwards with a hammer. Then clean the pieces of concrete
from inside the enclosure.
The MV cables must meet the minimum radius of curvature indicated by the cable
manufacturer, with the aim of having a sufficient length of cable inside the enclosure so as to
enable a comfortable arrangement and handling of terminals[2].
Once the MV connections have been performed, proceed with the sealing of the cable holes.
[2]See section 3.7 MV Terminal Connection.
Figure 3.2: Side access to CMS-17
Figure 3.3: Bottom access to CMS-17

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GENERAL INSTRUCTIONS FOR
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3.7. MV CABLE CONNECTIONS
MV incomings are made with cables. The connection of these cables with the MV switchgear
bushings is carried out using type C 400 series elbow connectors.
The cables are subsequently fixed onto their respective clamp supports and the earth
connectors of both the terminals and the cable shields are connected to the earthing bars of
the MV switchgear unit.
4. SEQUENCE OF OPERATIONS OF THE SWITCHGEAR
Once the CMS-17 Switching and Breaking Substation is installed, the MV switchgear
commissioning operations must be carried out.
4.1. OPERATING THE MV SWITCHGEAR
The operating sequences for starting up as well as shutting down the CGMCOSMOS
cubicles used in the electrical equipment are specified in Ormazabal's IG-078 General
Instructions document, which is supplied with the CMS-17.
5. MAINTENANCE
The requirements set out in the applicable legislation on Transformer Substations to protect
people and property which may be affected by the installations must be met.
The driving mechanism of the MV cubicle does not require any type of maintenance to
operate correctly during its estimated service life, under the conditions set out in
IEC-62271-1.
The live parts of the main circuit and switching equipment of the MV cubicle do not require
inspection or maintenance, as they are completely insulated in SF6, and therefore unaffected
by the external environment. Class E3 electrical endurance tests mean that the breaking
components are maintenance free.
The prefabricated building does not require any maintenance. Depending on the
circumstances, the lock may need looking at and greasing.
CAUTION:
Before carrying out any operation when voltage is present, we recommend checking the
SF6gas pressure, using the manometer.

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5.1. REPLACING THE ELECTRICAL EQUIPMENT
The electrical equipment in the CMS-17 Switching and Breaking Substation is replaced using
the following procedures:
a) Open the doors to access the electrical
equipment. The doors incorporate a system
for locking them at 90º and 180º. To unlock
the system, pull upward on the rod (a) and
open the corresponding door.
b) Disconnect the power to the Electrical Equipment, switching the MV switchgear unit to
the earthing position[3].
c) Disconnect the inner earth cable (a) that connects the cover and body of the CMS-17.
[3]Refer to the IG-078 General Instructions document for the CGMCOSMOS cubicle system, located in the
CMS-17 Switching and Breaking Substation document holder.
Figure 5.2: Disconnection of the earth cable for the cover
TIRAR
Figure 5.1: Opening and closing the door
(a)
(a)

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GENERAL INSTRUCTIONS FOR
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d) Remove the 4 protective caps (a) from the threaded inserts of the cover.
e) Attach and screw in the 4 M20 eyebolts provided inside the Transformer Substation to
the cover; remove the cover and place it on top of wooden planks (a).
Figure 5.4: Hoisting Eyebolts Figure 5.5: Positioning on the planks
f) Open the MV switchgear cable compartment lid[4]. Disconnect the power cables and their
earth connectors.
[4] Refer to the IG-078 General Instructions document for the CGMCOSMOS cubicle system, located in the
CMS-17 Switching and Breaking Substation document holder.
Figure 5.3: Caps for the threaded inserts of the cover
Weight of the cove
r
: 515kg
Figure 5.6: Cable compartment opening
(a)
(a)