technical survey

SC EGNATIA ROM SRL | JULY 2014

P a g e | 1

Technical Survey

Project: THIN FILM PHOTOVOLTAIC 4 X 1 MW

POWER PLANTS

Location: NUCI village, ILFOV county, Romania


P a g e | 2

1. INTRODUCTION

1.1. Plant Description

The following survey is held for a 1 MW solar plant to be built in Nuci village, Ilfov county,

Romania. The project is one of 4 identical projects to be constructed in the same area. The

survey will study a solution with 46 Wp thin film solar panels and SMA central inverters. The

photovoltaic panels will be mounted in an area of 194 000 sqm. All the structures will be installed

within a perimeter of minimum 5 m inside the border of each area, in order to avoid shadows

from the fence and to comply with local regulations.

1.2. Plant Location

The 1 MW plants are located in one compact area, NE of Nuci village, accessible from road

101D (WGS coordinates: 44°43'58.19" N, 26°17'16.07" E). .

Fig. 1 Plant location


P a g e | 3

1.3. Implementation stages

The construction of this project will be carried out following the stages below:

1. Site organisation

• Installation of materials container

• Installation of office container

2. Earthworks-Civil works

• Plot leveling (if required)

• Topographic plot definition

• Topographic solar park area definition

• Installation of mounting system’s foundation (steel pile foundation)

• Cable routing

3. Mechanical Equipment

• Fixed mounting system

• Fencing (NATO type)

• Lighting system

• Transformer LV/MV

• Security and Surveillance System

4. Electrical Equipment

• PV modules

• Inverters

• Equipment connection and installation

• CCTV system

4. Connection with the grid – Operational test period*

5. End of test period- Final connection with the grid*

* The grid connection technical solution and grid connection approval (ATR) are not yet arranged


P a g e | 4

2. LAYOUT STUDY

The scope of the layout study is to determine the best position of the mounting system and

the PV modules in order to improve performance by minimizing the inevitable losses that occur in

every solar park due to:

• Shading from natural obstacles

• Shading from project elements and structures

• Losses from energy conversion (DC-AC)

• Cable losses

A layout proposal has been issued by the customer and will be taken into account for the

technical and commercial solution. Upon this layout, a cabling diagram was constructed for each

project.

Each of the projects will be structured following the below guidelines:

• Minimum distance from fence: 5.00m

• Mounting system 2 pile, 3 panels portrait

• Mounting system inclination: 20ο

• Installation of 21730 PV panels, 46 Wp,

• Installation of 1 MV substation, 1250 kVA

• Installation of 2 central inverters from SMA, type 500 CP XT

• Installation of 18 string combiner boxes

• Axial distance between mounting systems: 7.85m


P a g e | 5

Fig. 2 Site Layout


P a g e | 6

3. EARTHWORKS – CIVIL WORKS

3.1 Marking of Site limits

Before the project’s startup, the limits of the site will be clearly defined by a topographer in

order all the necessary works to take place inside these boundaries.

3.2 Earthworks

The earthworks inside the site will be limited to the removal of high vegetation and trees in

order to facilitate the marking of the foundation beams. Also, potential terrain leveling for the

formation of temporary roads inside the park may be required in order to facilitate the access of

equipment to its suitable installation positions. Also, the large concrete constructions present on

site will be demolished and carried away, if necessary.

3.3 Topographic works

The topographical works will be conducted by a certified topographic engineer with

suitable electronic equipment (GPS), in order to achieve the best precision of the mounting

system’s axial distances and orientation. The engineer will mark the exact location of each

foundation beam, according to the layout study in order to proceed with the foundation and

installation of the mounting system.

The topographic works consist of:

• Marking the limits of each site according to title deeds.

• Marking the fencing

• Marking the east-west limits of each table

• Marking the exact places of all the foundation beams according to the study and ensuring

the specified distances between them

• Marking of cable trenches in relation to the foundation beams

By the end of the topographical works, in the site there will be differently colored poles that

will define the exact location of each element and will facilitate the next implementation stages.

3.4 Substations foundations

According to the specifications of the substation, for each cabin a 1 m deep foundation will

be dug, which will be flled with a 300 mm layer of compacted ballast and a 100 mm layer of

compacted sand. Above these layers, will be installed the substation tub, 600 mm high (the

enclosure that gathers all the cables entering the substation - LV/MV).


P a g e | 7

Fig. 3 Substation foundation

3.5 Cable and Grounding Ditches

Both DC and AC circuits of the park are to be built by means of underground electrical line, in

ditches that are designed in such a way that cable energy losses and costs are minimum. Also,

the grounding of the PV plant is made with steel tape buried in ditches. After the completion of

the works the ditches are covered according to normative with sand, soil, signaling tape and the

ground surface is restored and compacted. The digging works will be mechanized, done with

excavators, as follows:

• M-shaped ditch excavation 0.8 m / 0.6 m

• 10 cm sand layer

• Installation of cables at 2 x diameters distance

• Fill up with sand for 10 cm above cables

• Signalization tape

• Installation of Φ120 tube with guide

• Fill with excavation products

• Ground compacting

Fig. 4 Cable Ditch

For the cable routing will be installed cavidotto tubes, Φ120 with preinstalled steel guide,

inside the ditches. These tube are a backup solution in case of cable failure for any reason in the

future. Under each inverter or panel, as well as at cross points with other routes, water protected

concrete manholes or shafts 0.4x0.40x0.80m, with an iron cover will be installed,. These shafts

will be bottomless in order to drain rain water and will have metal grid to prevent pest infiltration.

The tube entrance in the shaft will be secured with polyurethane foam.

Grounding ditches will be dug at a 0.4m depth, forming a matrix around the PV panels area,

so that every row of the mounting system will be connected to earth.


P a g e | 8

3.6 Installation of mounting system’s foundation poles

Before startup, a detailed geotechnical study will be conducted. The study will combine the

geological study along with pull out tests and compression tests in order to determine the suitable

length of the foundation beams, their suitable axial distance and the suitable foundation method

for each project, according to soil quality (piles ramming or piles and concrete). Prior to this

study, the offer will be done according with general data available for the exact area of the

project.

Poles installation is one of the more

critical tasks during the implementation of

the project and their installation will be in

strict accordance with the marks defined by

the topographer engineer. The foundation

poles consist of hot deep galvanized steel

with a minimum Zinc layer of 80µm in

compliance with EN 1461 and the chemical

consistency of the soil and with 10 year long

anticorrosion guarantee.

The beams will be installed according

to the pre-specified marks with the use of

special installation equipment (ramming

machines), as seen in the picture.

Fig. 5 Poles ramming

The installation depth along with the beam axial distance will be determined after the

conduction of the geotechnical study. The PV mounting system will be supported on the

foundation beam and its assembly will be described further on.

3.7 Fence foundation

During this stage, the fence foundation will be built. Each pole of the fence will have a

separate concrete foundation and the ditch for the fence foundation will be dug on the exact

perimeter of each parcel, after a detailed marking done by the topographer. The concrete

foundation of the fence will be 20 cm wide x 40 cm deep.

3.8 Entrance ramp

A concrete ramp in the entrance of the park will be constructed in order to facilitate the

vehicle entrance on site. The ramp will have dimensions of 4.00x3.00x0.1m and will be made of

reinforced concrete C16/20. In case there is a need for a drainage system, a suitable pipe will be

embedded in the ramp.


P a g e | 9

4. GROUNDING AND LIGHTNING PROTECTION SYSTEM

The final grounding and lightning protection system will be determined in respect of the

results of the grounding and lightning protection studies that will be conducted on site from

specialized teams and according to the norms of international standards and local legislation.

The direct grounding system of the project will consist of:

• Hot deep galvanized steel beams

• Grounding tape 30x3 St/Zn

• Hot deep galvanized steel electrodes Φ20/1500

• Conductors 1x10 mm2 (final dimensions pending results of studies)

4.1 Protection grounding

The purpose of the protection grounding is to eliminate the possibility of any electric

dynamic situation with any conductive surface that humans can get in touch with. By creating a

system with all its surfaces connected in a grounding kit, accident risks are eliminated. The

foundation poles of the mounting system will be installed at least 1.50m inside the ground thus

providing an excellent grounding system that protects all the parts of the mounting system.

Moreover, all the foundation poles will be connected to the grounding tape network.

Grounding tape 30x3 mm will be installed in a grid at a 40cm depth and will be connected

to the mounting structure in order to create a network that will provide grounding and protection

from electric shocks. The PV modules will be equivalent connected with each other and in both

ends of each row with the mounting system, through 1x6 sqmm conductors. The transformer will

be grounded through an inside Faraday cage and through an outside ring of grounding tape 30x3

placed at its perimeter that will have Φ20x1500mm electrodes in each corner and the grounding

network of the park will be connected with the transformer’s grounding ring. Through the installed

grounding systems the total park grounding should be below 1 Ohm.

4.2 Lightning protection from indirect hits (AC)

Inside the park and more specifically inside the transformer and the junction boxes, in

order to protect the equipment from shock overvoltage that could occur due to thunder hits on the

grid, a system of shock overvoltage by Raycap or a similar firm will be installed.Rayvoss®

system is based on Strikesorb® technology and can secure total protection from shock

overvoltages. This system is widely used in Telecoms, automations, defense, hospitals, energy

plants and other important E/M plants for protection of critical electric elements.

4.3 Lightning protection from hits (DC-passive system)

In order to minimize the possibility of overvoltage on the edges of the strings, all the DC

cables (+.-) will follow the same route in order to minimize the loop surface and therefore to

minimize induction current that can be caused due to electromagnetic distortions in the

atmosphere.


P a g e | 10

5. METALLIC STRUCTURES

5.1 Fixed mounting system

The fixed mounting system consists of a double pile foundation mounting system that can

be adjusted in areas with abnormalities and significant inclinations. The mounting system will

respect Eurocode guidelines (EC1, EC3, EC7, EC9) and it will be statically calculated according

to Romanian legislation. The foundation beams consist of hot deep galvanized steel sections and

the main supporting system consist of aluminum sections on which the PV modules will be

placed.

The use of an aluminum structure offers a lot of advantages, compared to other types of

structures:

• Reduced weight, which simplifies transportation and handling issues

• Practically unlimited life span

• Minimum maintenance costs (the oxide layer formed on the aluminum structure protects it

against corrosion)

• Modular installation

• Best weight/durability ratio

Fig. 6 Example of two-pile, thin film panel structure


P a g e | 11

The assembly of the base is made upon the already installed ground beams. These beams

are installed in the ground with a depth, according to the results of the geotechnical study . The

connection of the aluminum structure on the ground beams is made with the hot deep galvanized

screws. The grounding of the aluminum structure is achieved through the beams that are injected

approximately 1.5 m in the ground. In this way each table is connected in an isodynamic way and

grounding is made directly. On the horizontal beams will be installed special rings that will sustain

the frames clippers. The rings will bear insulation material that will prevent direct contact of

aluminum frames with the bases aluminum, and therefore electrochemical corrosion in the future.

5.2 Fence

The preparation of the fence will follow the end off all earthworks. It will cover the length of

the perimeter of each site and will reach a 2.50m height. It will consist of Φ48 fence poles that will

be installed at 2.50m distance, metallic mesh 50x50 of 2.2mm thickness and 3 rows of barbed

wire on top of the fence.

The gate will have a 5.00m width in order to allow the easy access of vehicles and trucks

on site and will have of barbed wire on top in accordance with the rest of the fence. It will be

installed on the concrete ramp that will be constructed on each site. A 1 m wide pedestrian gate

will also be installed.

Fig. 7 Solar Park with fence (heavy duty fence with V poles and mesh on top)

5.3 Security system poles

Around the perimeter of each parcel and near each substation 6 m poles will be installed,

at a distance of 100 m away from each other. Video cameras and anti-breach infrared modules

will be installed on these poles.


P a g e | 12

6. ELECTRICAL EQUIPMENT

6.1 PV modules

For the energy production thin film panels will be used. The proposal taken into

consideration for the plant is the use of 46 Wp type panels.

The panels will be installed in the active surface of the base. The installation will be made

with the use of special clip-holders, made by the same producer as the metallic structure, with

EPDM rubber protection in order to secure total fitting of the elements and compatibility with thin

film panels. The installation of the panels will take place according to their technical specification

and characteristics. A sort-out procedure is possible, by selecting and separating the modules,

according to the nominal current lmpp, by line up number. Afterwards, depending on the panel

type will be selected strings of panels with similar voltage output. In this way is maximized the

panel strings performance, avoiding losses due to panels mismatch.

All panels will be isodynamicaly connected with cable ΗΟ7V-K 1x6mm2 and connected

with the grounding system. In order to minimize the possibility of induction overvoltage at the

end of the strings, all DC cables will lead through the same route in order to minimize the loop

surface they are included.

6.2 Inverters

The conversion of DC power to AC, in order to be injected to the grid, will be made with

central inverters, type SMA 500 CP XT.

The transformation of DC power to AC, in order to be injected to the grid, will be made through

inverters of SMA type CP. The specific inverters are chosen because of:

• High performance reaching 98,5% under normal conditions, which is minimum losses

through transformation.

• Flexible construction (outdoor).

• Cost effective solution.

The inverter CP type can be used outdoors without any further supportive works, like

shelters or others and can easily be transported and is plug & play architecture solution. These

inverters assisted by Opticool system, can operate on Nominal performance even in environment

temperatures up to 50 °C.


P a g e | 13

Fig. 8 SMA 500CP XT type inverter

Due to highly integrated features of network management the inverters can cover existing

or future needs. The most important feature though is the smart power management that can

give 10% more power from the nominal 500 kVA, reaching 550 kVA, in environment

temperatures up to 25°C. The inverters will sum up a total installed power of 1 MW. Taking into

consideration fixed panels position and the losses from the cabling and potential string

mismatches the inverters are fed constantly with the maximum power, making their production as

efficient possible and cost effective. Each inverter will be equipped with an add-on

communication kit RS485, in order to calibrate perfectly the inverter operation and send / process

data, to SMA server for the tele-monitoring system.

Features:

• Maximum performance ratio 98.5 %

• With the current error tracking system OptiTrac-MPP, is achieved the best performance

• Effective cooling system OptiCool

• Short circuit supervision – insulation supervision

• Power breaker ΑC- DC

• Overvoltage dispenser (AC,DC)

• Outdoor

• Protection class IP65


P a g e | 14

Fig. 9 SMA 500CP XT efficiency curve

6.3 String combiner boards

In order to connect the modules strings to the DC inputs of the inverter, 18 string combiner boxes

will be installed. The inverter has 9 inputs on the DC side, so we will have 120 or 121 strings on

each input of the inverter. In order to achieve this, 3 or 4 strings will be connected in parallel,

using T shaped MC 4 connectors.

Fig. 10 Distribution board installation on the support system


P a g e | 15

Fig. 11 Block diagram of 1 MW


P a g e | 16

6.4 Substations

The LV/MV transformation is achieved for each park with a 1250 kVA, 0.31/20 kV

transformer with 2 low voltage coils. The transformers will be mounted inside precast concrete

enclosures, having 3 compartments: low voltage, transformer and medium voltage.

Inside the low voltage room of each substation will be installed the LV board, through

which the inverters are connected to the transformer. Here will also be installed the monitoring

system rack and data logger. Each circuit will be protected from over current with a 1000 A

contactor. The transformer room will be equipped with special fans in order to ensure optimal

cooling. The MV compartment is equipped with MV cells that ensure protection and compliance

with technical normatives:

• Transformer cell with fuses

• Separator cell

• Switch cell with protection relay

• UPS with minimum 8 hours of autonomy

• Auxiliary transformer

• Internal services board

The ventilation of each MV kiosk shall be done with forced ventilation through wind flows

and gravity flaps. All input cabling will be done through special cable entries on the bottom of the

shelter (substation tub) and covered with polyurethane foam to prevent water infiltration. Internal

cabling shall be done with properly dimensioned metal grade. Cabling between the 2

compartments shall be made with horizontal metal grade of sufficient dimension to host

corresponding amount of cabling. All equipment will be fixed on the floor with special anchor

bolts. 10cm distance between equipment and shelter wall shall be left for clearance. All

equipment shall be grounded to internal copper bus bar. All output cabling shall be done through

floor with proper opening that shall prevent dangerous cable bend radius and will protect cabling

from rodents.

Transformer characteristics:

POWER (KVA) 1250

Type SEA TTO-4R2

TRANSFORMER TYPE Hermetic

Ambient temperature -25°C +40°C

Primary voltage 310 V

Primary current 1804 A

No load secondary voltage 20000 V

No load losses 1350 W

Load losses at 75°C 13500 W

Impedance voltage 6%


P a g e | 17

6.5 Power Plant Checking

Before and after the operation of the plant the following tests will take place by suitably

accredited personnel:

• Grounding measurements

• Grounding resistance < 1 Ohm

• Cable Riso > 1000 MOhm

• Inclination check for the bases

• Pull out and horizontal testing in foundation piles

• Zinc layer thickness measurement

• Bolt tightening torque for mounting structure and for electric connections

• Isodynamic connection check with multimeter

• Cable checking on site

• I-V of Isc testing in strings

• Polarity

• Input voltage for inverters < 700V

• Polarity on AC cables

• Quality control with thermal (max ∆θ=10οC)

• Panels

• Strings connections

• Inverters connections

• Board connections

• Substation testing

• Operation instruments and relays

• Parameters for substation on Grid connection

6.6 System Standards

All electromechanical works will comply with the following Romanian Standards and

Normatives:

NTE 002/03/00: Normative For Electrical Plants Protective Systems Tryouts And

Measurements

NTE 005/06/00: Normative Regarding Calculus Elements And Methods Of Electrical

Installations Functioning

NTE 007/08/00: Normative For Cable Electrical Networks Design And Installation

8. CABLING

8.1 DC Cabling

In order to achieve the voltage needed for the connection to the inverter,

connected in series, forming a string.

input of the string combiner box. For the connection of each string

cable, OLFLEX 1x4mm2 will be used.

of high durability elastic. The cables follow the standards HD 22.4 and are recommended for use

in moist or dry outdoors solutions. Different colors( red and black)will be used for signaling

depending on polarity.

At the cable edge there are cable terminals MC

solar cable will be fixed to the metallic bases with U/V resistant tire

Cable specs:

• Temperature operational spectrum

• Maximum allowed voltage 1.8KV DC

• Expected life span > 25 years

• UV protected

• Can easily be installed outdoors, in pipes or channels

• Insulation and shield from free halogens mix, extremely durable in high temperatures.

For installation special tools

Fig. 13 Cable terminals and crimping pliers


In order to achieve the voltage needed for the connection to the inverter,

connected in series, forming a string. 3 or 4 strings will be tied in parallel and connected to one

For the connection of each string to the string combiner,

will be used. This is a flexible cable with insulation and mantle protection



Fig. 12 Olflex Solar Cable

At the cable edge there are cable terminals MC-4 fit for P/V systems installations. The

solar cable will be fixed to the metallic bases with U/V resistant tire-ups.

spectrum -40οC to 120οC

Maximum allowed voltage 1.8KV DC

Expected life span > 25 years

Can easily be installed outdoors, in pipes or channels

Insulation and shield from free halogens mix, extremely durable in high temperatures.

on special tools (crimping pliers) provided by the manufacturer are used.

Cable terminals and crimping pliers

JULY 2014

P a g e | 18

In order to achieve the voltage needed for the connection to the inverter, 10 panels will be

3 or 4 strings will be tied in parallel and connected to one

to the string combiner, a DC

a flexible cable with insulation and mantle protection



4 fit for P/V systems installations. The

Insulation and shield from free halogens mix, extremely durable in high temperatures.

provided by the manufacturer are used.


P a g e | 19

Solar cables will be attached with UV-protected cable ties to the horizontal purlins of the

metallic structure. If the string combiner is not on the same table as the strings that connect to it,

then the solar cable will be buried at 0.6 m underground and protected with corrugated ducts.

For power transportation from the string combiner boxes to the input side of the inverters

we will use aluminum NAYY cable, 2x120 mm2. These cables will be buried at 0.80 m (under the

freezing temperature limit), between 2 layers of sand, in order to obtain cooler temperature,

better conductivity and protection from mechanical stress caused by heavy vehicles trespass or

others.

Fig. 14 NAYY cable

8.2 ΑC Cabling

For the power transport from the inverters to the LV board of the substation, as well as

from the LV board to the transformer, the choice will be a 3-conductor per phase copper cable,

NYY, with a cross-section of 3x240 mm2. This cable will be installed to ensure minimum losses of

energy. Also, in order to ensure a minimum voltage drop, the inverters will be installed near the

substation.


P a g e | 20

9. SECURITY SYSTEM

A security system in order to protect equipment from vandalism or theft and generally to secure

the unobstructed park operation will be installed according to the design of a specialized security

system provider.

The security system will typically consist of:

• Alarm system

• Cameras network

• Light spots network system

9.1 Alarm system

• Perimeter system of infrared beams installed 0.5 m inside perimeter fence.

• Access system with pin code numerical pass, near the entrance.

• Events registry system

• GSM modem for data transfer to surveillance center.

In case of perimeter breaching of beam network, alarms and events are triggered to notify

security personnel.

9.2 Cameras network

• Cameras network

• Data recorders in the security station

The cameras have operational surveillance distance of 100m with zoom x10. Are installed in

such height, so can record malicious actions against equipment. The cameras network is

triggered by perimeter breaching. The recorder can store footage locally or can be sent via fast

network connection to a remote security center.

9.3 Lights

The purpose of the lights network is to provide luminosity enough, to allow sufficient cameras

recording and safe personnel trespassing that might visit the premises, during night time. It can

be activated manually from the light control board, or automatically by the perimeter breach.

The level of security measures can be tailored to the customer needs. The specs and prices are

indicative and apply to common cases. For the specific case, taking into account of the size of

the plant and the vandalisation history in the area, the security issue needs to be detailed in

depth with the beneficiary. Most probably permanent security personnel have to be allocated,

with a higher level security proposal.


P a g e | 21

10. REMOTE MONITORING SYSTEM

The remote monitoring system proposed for the specific plant is from company “Inaccess” and

provides real-time supervision of the following data.

The system offers:

• Turn- key solution for solar parks management and PR measurement.

• Autonomous operation of the solar park.

• Centralized management of the park.

• Alarm detection and management.

• Combination and correlation of alarms with all parameters and values received from the park

by intelligent software.

• Immediate informing for any problem or failure so as to minimize the equipment downtime.

(Capability for SMS/email notification in case of critical alarms).

• Periodical execution of equipment control and maintenance procedures according to the

specifications of the equipment manufacturers.

• Measurement of the performance of the installed infrastructure and of the park as a whole.

• Monitoring and recording of necessary data for the automatic creation of a variety of reports

concerning the supervised solar parks.

• Secure and ciphered communication between the control center and the park for interception

avoidance.

• Support of multiple and geographical distributed solar parks through a common control

center.

Fig. 15 Remote monitoring system


P a g e | 22

11. MAINTENANCE AND WARRANTIES

11.1 Cleaning and Maintenance

Personnel will be assigned specific tasks for the scheduled park maintenance:

• Visually inspection of the panels and act upon specific cases, but it is not recommended to

periodically clean or through water, besides the rain.

• Keep vegetation low on height in order to keep ground in natural condition and seed low

plantation,in order to keep a level of natural moisture to keep ground layers and

underground cables, cool, therefore minimize losses.

• Visually inspection structures, groundings, connections, fence, etc.

• Adjust and keep calibrated security equipment, if needed.

• Keep light network operational by changing lamps, etc.

• Keep events book record registry.

• Keep drainage system for pluvial water operational.

Regarding cleaning of the panels, it is recommended to follow the cleaning instructions provided

by the panel supplier. Most manufacturers recommends periodic cleaning of the PV modules to

ensure maximum power output. The glass surface of the PV modules should be cleaned with a

soft brush with the use of soft, clean water with recommended pressure less that 690kPA, typical

of the most municipal water systems. It is not recommended to use water with high mineral

content as it may leave deposits on the glass surface. Power or pressure washers and steam or

corrosive cleaning agents are not to be used for the cleaning of the modules.

In case of snow, the modules should be cleaned with a soft brush but in case of frozen snow or

ice it shouldn’t be tried to taken out.

During maintenance visits, the following tasks will be checked:

• Visually inspection of the panels and actions will occur upon specific cases.

• Vegetation will be kept low on height in order to keep ground in natural condition. Low

seed plantation would be best to get planted, in order to keep vegetation’s height low and

also maintain a level of natural moisture to keep ground layers and underground cables,

cool, therefore minimize losses.

• Visually inspection of structures, groundings, connections, fence condition, etc.

• Adjust and keep calibrated security equipment, if needed.

• Keep light network operational by changing lamps, etc.

• Keep events book record registry.

• Keep drainage system for pluvial water operational.


P a g e | 23

11.2 Warranties

• PANELS: This warranty is assigned by the manufacturer.

• INVERTERS: This warranty is assigned by the manufacturer

• SUBSTATIONS: 24 months.

• BASES Alumil:

o 10 years anticorrosion warranty by the producer

o 25 years static sustainability

• 1 year warranty of good execution by the Contractor.

o 48 hours intervention for operations productive elements alarm.

o 5 days for other alarms not affecting production.

technical survey

Documents

site layout sc egnatia

installation cctv system

romania sc egnatia rom

kva installation

surveillance system

system inclination

layout study

mw solar plant