Ormazabal PREFORMA-PF-4 Instruction manual

PREFORMA-PF- 4 / 5
ASSEMBLY AND USE OF PREFABRICATED
PRIVATE STATIONS (LV METERING)
(Substations designed for NFC13-100 installations)
General Instructions
LIB
02.10.2007
MV switchgear
Primary Distribution
MV switchgear
Secondary Distribution
Protection and
automation
MV / LV
Transformers
IG-138-EN
version 02
Transformation
Substations
Low voltage
Board

Legal deposit: BI-3061/07
WARNING!
When a WV facility is working, some of its components are powered on, others may be moving and some parts can reach high
temperatures. Therefore, using it can entail electrical, mechanical and thermal risks.
In order to provide an acceptable protection level for persons and assets, Ormazabal develops and builds products according to
the integrated safety principle, which is based on the following criteria:
Eliminate dangers whenever possible.
When, this proves technologically or economically impossible, fit suitable safety features on the equipment
yourself.
Detail the remaining risks in order to facilitate the design of operational procedures preventing these risks, the
training of the operating personnel that carry them out and the use of appropriate personal protection equipment.
Use recyclable materials and establish treatment procedures for the equipment units and their components after
the end of their life, in order to guarantee their proper handling, adhering to the environmental criteria established
by the appropriate bodies.
Therefore, only personnel fully approved and trained according to publication UTE C18-510 can work on or near the equipment
this manual refers to. This personnel must also be fully familiar with the instructions and warnings contained in this manual and
with those of a general nature that apply to it and that derive from the laws in force (Decree of 14 November 1988 and
amendments; labour code).
Please follow the instructions provided above. Indeed, the correct and safe operation of this equipment does not depend solely
on its design; it also depends on the general circumstances over which the manufacturer has no control and for which it cannot
be held responsible, in particular that:
The transport and handling of the equipment, from the factory to the place of installation, is carried out correctly.
Any intermediate storage is carried out under conditions which do not alter or deteriorate the characteristics of
the unit or its critical parts.
The conditions of service are compatible with the characteristics assigned to the equipment.
Handling and operation are done strictly according to the instructions in the manual, and with a clear
understanding of the operating and safety principles applicable to them.
Maintenance is done in an appropriate manner, taking into account the real operating conditions and the
environmental conditions in the place of installation.
For these reasons, the manufacturer will not be held liable for significant damage caused by the infringement of the guarantee,
whatever the competent jurisdiction. This includes loss of profit, downtime, material repair or replacement expenses.
Guarantee
The manufacturer guarantees its product against faulty materials and operating faults for the duration of the contract. In the
event of a fault, the manufacturer must repair or replace the equipment. Inappropriate handling of the equipment and repairs
done by the user are an infringement of the guarantee.
Trademarks and Copyrights
All the trademark names on this document are the property of their owners. The intellectual property of this document belongs to
the manufacturer.
Following the constant evolution of standards and new concepts, these specifications may be modified without prior warning.
These specifications, and the availability of the materials, are only valid after confirmation from Ormazabal’s Technical - Sales
Service.

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SUBSTATIONS (LV METERING)
IG-138-FR
version 02
02.10.2007
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INDEX
1.DESCRIPTION OF THE ENCLOSURE......................................................................... 5
1.1.ADJUSTMENT OF VENTS ACCORDING TO TRANSFORMER POWER ................. 5
1.2.MV / LV SINGLE WIRE DIAGRAM ............................................................................. 6
1.2.1.Oil Retention Tank ............................................................................................... 7
1.2.2.Cable Entries........................................................................................................ 7
1.2.3.Access to the Substation...................................................................................... 7
1.2.4.Telltale.................................................................................................................. 8
1.2.5.Antenna Fixture.................................................................................................... 8
1.2.6.Identification of the Substation............................................................................. 8
1.3.ELECTRICAL EQUIPMENT ........................................................................................ 8
1.3.1.Transformer.......................................................................................................... 8
1.3.2.MV switchgear...................................................................................................... 9
1.3.3.MV Connection..................................................................................................... 9
1.3.4.MV Cable Curvature Radii ................................................................................... 9
1.3.5.LV switchgear..................................................................................................... 10
1.3.6.LV connection between Transformer and TGBT................................................ 10
1.3.7.Connection of the LV Network ........................................................................... 10
1.3.8.Auxiliary Circuits................................................................................................. 10
1.4.PROTECTION AND GROUNDING CIRCUITS ......................................................... 11
1.4.1.Earthing the Conductive Parts ........................................................................... 11
1.4.2.Grounding the LV Neutral .................................................................................. 11
1.5.MAINTENANCE......................................................................................................... 11
2.MECHANICAL FEATURES ........................................................................................ 12
3.TRANSPORT............................................................................................................... 13
4.MOUNTING ................................................................................................................. 14
4.1.EXCAVATION PLAN................................................................................................. 14
4.2.HOISTING - GUIDELINES......................................................................................... 15
4.3.CONSTITUENT PARTS ............................................................................................ 16
4.4.EARTHING CIRCUITS .............................................................................................. 17
4.4.1.Excavation Bottom Earth.................................................................................... 17

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
IG-138-F
R
version 02
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5.REPLACEMENT OF THE SWITCHGEAR.................................................................. 17
5.1.REPLACEMENT OF THE TRANSFORMER............................................................. 17
5.2.REPLACEMENT OF THE MV BOARD ..................................................................... 17
5.3.REPLACEMENT OF THE TGBT............................................................................... 17
6.ADDITION INFORMATION ......................................................................................... 18
6.1.RE-SUPPLY OF THE LV OR MV .............................................................................. 18
6.2.TAKE-DOWN OF THE SUBSTATION AT END OF LIFE ......................................... 18
6.3.SPARE PARTS.......................................................................................................... 18
7.LAYOUT PLANS (NON-CONTRACTUAL INFORMATION) ...................................... 19
ANNEX 1: SUBSTATION LAYOUT PLAN ........................................................................... 24

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
IG-138-FR
version 02
02.10.2007
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1. DESCRIPTION OF THE ENCLOSURE
PREFORMA-PF substations meet the IEC 62271-202 standard for submerged transformers
with a power less than or equal to 1250 kVA.
1.1. ADJUSTMENT OF VENTS ACCORDING TO TRANSFORMER POWER
On PREFORMA-PF4 type 1000 / PF5 type 1000. Vent configuration: two lateral vents, one
rear vent and one vent on transformer door.
For power values of less than or equal to 400 kVA, the two low and high lateral vents must
be closed with the vent shutters provided for this purpose (optional), to avoid condensation
problems.
For a power values over 400 kVA, all the lateral vents must be left open.
When the metal shutters are delivered, they are installed on the lateral vents.
N.B. : The intake of fresh air is done through the ventilation grilles located at the bottom.
Therefore, care must be taken not to obstruct these holes and to leave a space of at least
200 mm between the panels in question and any wall or bank.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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version 02
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1.2. MV / LV single wire diagram
Visible Breaking
Switch
(key interlock)
TRANSFORMER
DGPT2 or DMCR
Fitted with LV cover and key
locking on MV terminals.
Coil supply (DGPT2)
2I+P
+I
(PF-4)
+I
(PF-5)
Master
Circuit-breaker
Socket 2P+T, 16 A – Diff 30 mA
TGBT (low voltage master distribution board) or circuit-
breaker on chassis (without outputs)
MV BOARD Possible extensions
2I + Combined Fuse Protection
(fitted with key interlock on earthing
disconnector)
Divisional outputs
possible on request
Internal lighting
Fault Detector Supply
Free (for autonomous supply,
etc.
)
Auxiliary
supply board
Safety lighting (BS)
Unpluggable
circuit-breake
r

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
IG-138-FR
version 02
02.10.2007
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1.2.1. Oil Retention Tank
The sealed tank located under the transformer allows all of the oil to be recovered in the
event of transformer failure. The oil is recoverable using a pump strainer.
The volumes of the oil retention tanks are as follows:
PREFORMA-PF-3/4: 1.15 m3
PREFORMA-PF-5: 1.25 m3
1.2.2. Cable Entries
MV or LV cable entries are available on Ormazabal substations. See drawings in the annex.
MV: Diameters 180;
LV: Diameters 110;
Ground; Auxiliaries: Diameters 60.
180 mm diameters are provided for 160 mm sheaths.
Underground substations have special cable seals to guarantee the tightness of the cable
entries.
Provisional connection hatch:
A 100 mm diameter hatch, placed on the front of the substation enables the LV cables to be
run in for any provisional connection. This hatch when closed provides IP2X, open with the
cable or sheathe in place, it provides IP1X.
Substation re-supply hatch (backup):
A rectangular hatch located in the lower part and on the front of the substation allows it to be
re-supplied with LV or MV by means of a generator. With the substation in service, the hatch
placed on the runners blocks the hole and guarantees IP1X.
1.2.3. Access to the Substation
Only one door of the substation can be opened from the outside: it's the “pedestrian”
entrance, accessing the switching corridor to carry out normal switching operations. This
door isn’t fitted with an anti-panic lock.
A catch enables the access door to be locked at 90º and 180º.
The second “transformer access” door opens from the inside of the substation only by means
of three pull tabs spread over the height of the door.
The intermediate pull tab is designed so as to create a cushion to easily see the door's
position, by creating an opening angle large enough to prevent personnel thinking that it is
closed when it is just pushed back.
The closure of the “transformer” door therefore requires the intermediate pull tab to be pulled
while the other two are locked in the “pulled” position.
Ensure after closing the door that the three pull tabs are in the correct position.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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R
version 02
02.10.2007
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1.2.4. Telltale
A position is reserved for the positioning of fault detection telltales. They are protected by a
window with degree of protection IK10 (20 joules).
1.2.5. Antenna Fixture
A position on the right lateral exterior face is reserved for a remote control interface support.
The position can be chosen at the time of the order. For aesthetic reasons, the positions are
obstructed by plugs painted in the colour of the substation.
1.2.6. Identification of the Substation
All the substations are identified by a data plate located on the Fault Detector telltale holder
plate, inside the substation.
1.3. ELECTRICAL EQUIPMENT
1.3.1. Transformer
The PREFORMA-PF type substations take NFC52-112 transformers whose maximum
usable power is 1250 kVA adhering to the ventilation conditions seen previously. It is
possible to regulate the substation's ventilation according to the transformer’s power. For
this, removable ventilation grille shutters are provided.
Anchoring points are provided in the substation for the purposes of the transportation of the
transformer included in the substation. The assembly must be done in accordance with the
manufacturer's instructions. For the transformer to be correctly positioned, the 4 wheels must
be positioned in the slots provided for this purpose.
These transformers are fitted with a system of protection against transformer internal faults of
type DGPT2 or DMCR.
These transformers are fitted with an LV cover and a locking system for the separable
connectors complemented by a lock.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
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SUBSTATIONS (LV METERING)
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version 02
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1.3.2. MV switchgear
The PREFORMA-PF substations take MV boards of type HN64-S52/IEC 62271-200. The
assembly must be done in accordance with the manufacturer's instructions. The number of
cubicles that can be incorporated depends on their dimensions.
On the average basis of 375 mm per functional unit, the PREFORMA-PF-4 / 5 can
incorporate 4 and 5 functional units respectively[1].
Within the limit fixed, it is possible to make an Ormazabal extension in the PREFORMA-PF
substation.
At least, the board will be made up of one switch input (distributor input) and one combined
fuse protection cubicle (protection of the transformer). Substation located at antenna.
Furthermore, the feedline break and double bypass electrical diagrams can be produced.
The protection bypass is fitted with at least one tripping coil on switch opening and locking
keys positioned on the earthing disconnector in order to ensure the safety of switching
operations during operation.
1.3.3. MV Connection
The connection must be made according to the instructions of the functional units, in
synthetic-insulated tri-polar cable according to standards NF C33-223 or NF C33-226 of
cross-section less than or equal to 240 mm2. Connections to the MV equipment depend on
the type of cubicle. They are to be executed with 400 A type separable elbow terminals of
type 400 A compliant with the NF C33-051 standard.
The MV equipment / transformer connection is made by synthetic-insulated unipolar cables
compliant with standard NFC33-223 or NFC33-226 of 50 mm2 aluminium fitted with
separable connectors in compliance with the NF C33-051 standard of type 250 A. The
connection is to be fixed with the fixtures provided for this purpose and placed on the wall.
1.3.4. MV Cable Curvature Radii
The layout of the equipment in the substation allows adherence to the minimum curvature
radii provided by regulations.
MV Cable
Single pole
150 to 240 mm2
MV Cable
Twisted
150 mm2
MV Cable
Twisted
240 mm2
NFC33-223
NFC33-226 600 mm 800 mm 900 mm
The "knock-out" holes for cable entry are placed on an inclined plane, which makes it
possible to limit the height of the pit while allowing for the curvature radius of the cables.
[1] For other layouts, consult Ormazabal's Technical – Sales Department.
N.B. : Use a stone chisel to knock out the entry holes.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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02.10.2007
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1.3.5. LV switchgear
The PREFORMA PF substations can take prewired TGBT boards or simplified TGBT boards
including at least one master circuit-breaker containing one visible breaking.
The TGBT are prewired according to the guidelines of standard NFC15-100.
The equipment will be dimensioned according to the transformer power and the LV neutral
regime used.
1.3.6. LV connection between Transformer and TGBT
The cables used and supplied with the substation will be sized according to the power of the
transformer, the neutral system and the boundary conditions of the installation (installation
method, harmonic rate, voltage drops, risks of explosion, fire, reference temperature, type of
cable).
Each cable includes a functional marking on each end.
The curvature radii will be adhered to, i.e. 10 to 12 times the cable diameter.
1.3.7. Connection of the LV Network
The connections are made by the principal and must comply with the provisions of
NFC13-100 and NFC15-100.
The "knock-out" holes for cable entry are placed in an inclined plane, which makes it possible
to limit the height of the pit while allowing for the curvature radius of the cables.
1.3.8. Auxiliary Circuits
An auxiliary circuit supply board may be provided and its sizing will be in accordance with the
short-circuit powers of the transformers, the LV neutral regimes and the type of tripping coils
(emission or lack of voltage).
The board will supply:
The coils associated with the transformer's DGPT2.
The internal lighting and safety lighting.
The Fault Detector.
The 2P+T 16 A socket.
N.B. : Use a sledgehammer and a stone chisel to knock out the entry holes.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
IG-138-FR
version 02
02.10.2007
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Internal Lighting of the Substation
The substation is delivered with two wall lights to illuminate the interior of the substation. The
lighting command is made by a switch at the entrance to the substation.
The safety lighting is provided by an autonomous block located above the access door.
MV Fault Detectors
The fault detectors are directional or amperometric and comply with the EDF HN 45-S-51
specification.
Automatic Power Source Switch - PASA
The substation can be fitted with an Automatic Power Source Switch (PASA) compliant with
the HN 45-S-41 specification.
1.4. PROTECTION AND GROUNDING CIRCUITS
The protection circuits are chosen according to the LV neutral regime used and its
components are sized accordingly.
In general and according to NFC13-100 guidelines, the doors and vents will not be
connected to the conductive parts' earthing circuits and therefore, placement of any
equipotential belt (intended for protection against voltage step) is totally prohibited.
1.4.1. Earthing the Conductive Parts
The substation's conductive part connecting devices are different in nature according to the
LV neutral regimes used and cover 3 earthing groups (MV earth; LV earth, neutral earth).
The equipment's conductive parts will be connected to the MV earthing group.
1.4.2. Grounding the LV Neutral
The transformer neutral will be earthed according to the recommendations of NFC13-100
according to the neutral regimes used.
1.5. MAINTENANCE
No maintenance needs to be carried out on the enclosure, except for clearing the vegetation
away from the vicinity of the vents and doors.
For the maintenance of the various switchgear, refer to the specific manufacturer's
documents.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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R
version 02
02.10.2007
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2. MECHANICAL FEATURES
External dimensions of the PREFORMA-PF substations:
Length Width
Height
Above
Ground
Total
Height
Floor
surface
area
PF-3-400 / PF-4-1000 / PF-4-1250
Flat roof 3.667 m 2.17 m 2.57 m 3.325 m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
Sin
g
le pitch roof Romanesque Tiles 3.667 m 2.17 m 3.11 m 3.86 m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
Double pitch roof Romanesque Tiles 3.667 m 2.17 m 3.08 m 3.83 m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
4-pitch roof Romanesque Tiles 3.667 m 2.17 m 3.08 m 3.83 m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
Sin
g
le pitch roof Slates or Flat tiles 3.667 m 2.17 m 4.55m 5.30m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
2-pitch roof Slates or Flat tiles 3.667 m 2.17 m 3.73 m 4.48 m 7.96 m2
PF-3-400 / PF-4-1000 / PF-4-1250
4-pitch roof Slates or Flat tiles 3.667 m 2.17 m 3.85 m 4.60 m 7.96 m2
PF-5-1000 / PF-5-1250
Flat roof 4.490 m 2.37 m 2.57 m 3.325 m 10.64 m2
PF-5-1000 / PF-5-1250
Sin
g
le pitch roof Romanesque Tiles 4.490 m 2.37 m 3.13 m 3.88 m 10.64 m2
PF-5-1000 / PF-5-1250
2-pitch roof Romanesque Tiles 4.490 m 2.37 m 3.11 m 3.86 m 10.64 m2
PF-5-1000 / PF-5-1250
4-pitch roof Romanesque Tiles 4.490 m 2.37 m 3.11 m 3.86 m 10.64 m2
PF-5-1000 / PF-5-1250
Sin
g
le pitch roof Slates or Flat tiles 4.490 m 2.37 m 4.71 m 5.46 m 10.64 m2
PF-5-1000 / PF-5-1250
2-pitch roof Slates or Flat tiles 4.490 m 2.37 m 3.94 m 4.69 m 10.64 m2
PF-5-1000 / PF-5-1250
4-pitch roof Slates or Flat tiles 4.490 m 2.37 m 3.96 m 4.71 m 10.64 m2
PREFORMA-PF substation conductive parts (complete product with all its switchgear,
except the transformer, roofs).
CONDUCTIVE PARTS PF-3 / PF-4 PF-5
Flat roof 12.5 tons 14.5 tons
2-pitch roof 30% Romanesque tile 13.5 tons 15.5 tons
1-pitch roof 22 -25% Romanesque
tile 13.8 tons 16 tons
2-pitch roof 100% slates 15.4 tons 16.7 tons

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
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version 02
02.10.2007
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3. TRANSPORT
Transportation is by road vehicle, up to the commissioning site.
The station is placed by us on its previously prepared location [2].
The principal and its representative must take all the administrative and legal decisions
required for the unloading operations (traffic bylaws, tonnage exemptions).
[2] See Annex 1

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
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4. MOUNTING
4.1. EXCAVATION PLAN
The preparation and execution of excavations and the associated administrative procedures
must be carried out by the principal or its representative save particular agreement with
Ormazabal.
Refer to the “Substation placement sheet” in Annex 1.
The various earth connections (“MV” earth; neutral earth; “LV” earth) must be made
according to the standard recommendations in force.
Minimum recommended dimensions of the excavations:
Length (L) Width (l) Depth
PF-3 / PF-4 4.3 m 2.8 m 0.85 m
PF-5 5.1 m 3.0 m 0.85 m
Note: For any other layout (banking, drainage, etc.) consult Ormazabal's Technical -
Sales department.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
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SUBSTATIONS (LV METERING)
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02.10.2007
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4.2. HOISTING - GUIDELINES
Make sure that the ground in the crane's stabilisation zone is stable and level.
PREFORMA-PF type substations are fitted with 4 anchorage points of type DEHA-6000-7,5.
Two are located on the front and two on the back. The slings must have the appropriate
anchorage system. In order to guarantee safety during handling, the lengths of the straps
must match the height of the substation fitted with any roofing.
The location of the post in the excavation should
be marked to facilitate alignment.
Polystyrene plates for distancing the slings
from the low tiles
Approved gripping system
Provide 300 mm for the placement
or removal of the anchorage
system.
IMPORTANT: Always use the slings and the gripping systems defined by Ormazabal.
7m
7m
Excavation

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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Normal unloading conditions are:
Access to the unloading site by a truck (19 m long x 2.5 m wide x 4.50 m high).
Zone stabilised for unloading (slope < 1%).
Absence of aerial or other objects within a sufficient radius (electricity lines, telephone
lines, trees, pipes, walls, etc.).
For any other delivery conditions, consult Ormazabal's Technical– Sales department.
4.3. CONSTITUENT PARTS
PREFORMA enclosure (PREFORMA-PF-4 / 5 according to order description).
Neutral grounding connection
Re-supply hatch, temporary supply (external).
Fixture frames for MV, TGBT boards, electronic switchgear.
Regulation notices
Extinguisher
Safety booms and detex.
Glove box.
Insulating mat
Fixtures for MV connection: UF/Transf.
Oil recovery pit.
The substation's internal circuits: internal lighting + autonomous safety lighting unit.
According to Order:
MV Board
Earthing circuit
Options
Green tariff metering table
Vent shuttering system (on request).
Auxiliary supply board.
BAPI (Portable Lighting Box)
MV connections between MV and transformer,
LV connections between transformer and TGBT.
Circuit-breaker on chassis or TGBT.
Condenser battery.
Lightning conductor.
On the order, the customer must specify the power, the LV neutral regime, the equipment,
the options and the installation's boundary conditions (harmonics rate; risk of explosion, fire;
reference ambient temperature; oversizing coefficient Possible customer).
WARNING: For the mounting of the gripping systems, they must face upwards, so the sling hook is
located at the top.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
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version 02
02.10.2007
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4.4. EARTHING CIRCUITS
4.4.1. Excavation Bottom Earth
Under the installer's responsibility: the substation is earthed before the substation is placed.
It is to be connected to the conductive parts’ connection device in accordance with the
regulatory provisions in force.
5. REPLACEMENT OF THE SWITCHGEAR
After application of the regulations in force, switchgear replacement operations are possible
through the substation's doors. These operations are executed by authorised staff, under the
responsibility of the principal.
5.1. REPLACEMENT OF THE TRANSFORMER
With the transformer and MV and LV cables powered down and earthed, remove the
cover’s lid and the interlocking of the MV plugs. Keep the components.
Disconnect the MV, LV links and the transformer's Earthing components according to the
manufacturer's instructions[3].
Remove the transformer's holding slings. Replace the transformer.
At the end of the operation, you must put back the earth connections as they were
originally.
5.2. REPLACEMENT OF THE MV BOARD
Disconnect the MV boards following the manufacturer's recommendations:
Dismount the fixture points of the MV board to be replaced (the rear of the board is not fixed
by screws but held in place by two peaks, which enables the board to be pulled forward
unhindered, once the fixing screws are removed. It is important to leave the rails embedded
in the floor in place).
Remove the MV board and replace it.
5.3. REPLACEMENT OF THE TGBT
The TGBT board is fixed onto the vertical rails and to the ground.
The powered down TGBT:
-Disconnect the board's outputs and inputs.
-Disconnect the LV auxiliary supply board.
-Disconnect the TGBT's earthing bridges.
-Dismount the TGBT's fixture points.
Remove the TGBT and replace it making any required adjustments to the vertical rails.
[3] See paragraph 1.3
N.B. : There is a low point (left, front corner) for the placement of a pump strainer for oil
recovery.

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ASSEMBLY AND USE OF PREFABRICATED PRIVATE
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6. ADDITION INFORMATION
6.1. RE-SUPPLY OF THE LV or MV
Re-supply is done by means of adapted cables passing through the access hatch provided.
The access hatches are captive through use of chain with links.
Use is made of this hatch as follows:
1. Inside the substation, slightly unscrew the two nuts retaining the vertical plate.
2. Unscrew the central nut WITHOUT taking it out.
3. Release the outer plate by passing the retaining nut through the slot provided for this
purpose.
4. Place the external plate on the ground - a retaining chain is fixed on this plate and keeps
it captive.
5. Slide the internal plate upwards, in order to pass through the recharge cables which will
be placed in a layer in the hole.
6. Lower the internal hatch down to the stop on the recharge cables.
7. Retighten the two screws in order to fasten the plate on the cables.
To bring out the recharge cables, do the operations in the reverse order.
6.2. TAKE-DOWN OF THE SUBSTATION AT END OF LIFE
All the materials forming the substation enclosure are recyclable.
The take-down of the substation at end of life must be done as follows:
1. Apply all the regulatory provisions in force to proceed withdraw the structure from service.
2. Clear the perimeter of the substation to access the anchorage systems to do the lifting.
Leave at least 300 mm clearance to place the DEHA anchors.
3. Place the slings as indicated in this document.
4. Lift the substation and load it onto the truck.
The substation is made of fibre-reinforced concrete. It can be crushed to be used as road
sub-base. The metal features (steel) can be recycled by the competent bodies.
6.3. SPARE PARTS
For all spare parts or technical information, please contact Ormazabal's Technical-Sales
Department.

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
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version 02
02.10.2007
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7. LAYOUT PLANS (Non-Contractual Information)
PREFORMA-PF-3 type 400 (limited to 400 kVA)

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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
STATIONS (LV METERING)
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R
version 02
02.10.2007
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PREFORMA-PF-4 type 1000 (limited to 1000 kVA)