el instalacije Cetinje

GOVERNMENT OF MONTENEGRO

MINISTRY OF SUSTAINABLE

DEVELOPMENT & TOURISM

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MAY 2013.

PRELIMINARY DESIGN FOR WWTP CETINJE & SEWERAGE NETWORK WITH FACILITIES

MUNICIPALITY OF CETINJE / MONTENEGRO

BOOK 5 – WASTE WATER TREATMENT PLANT

VOLUME 5.5.3 – ELECTRICAL DESIGN – ADDITIONAL INSTALLATIONS

IOV10-17 IK CONSULTING ENGINEERS – APRIL 2012 PAGE 1

GENERAL PROJECT CONTENT

No. NAME OF PROJECT PART

GEOTECHNICAL STUDY

HYDROLOGICAL STUDY ON RAINFALL AND FLOW

BOOK 1 GENERAL BOOK

BOOK 2 SEWAGE NETWORK

BOOK 3 ATMOSPHERIC NETWORK

BOOK 4 HYDRAULIC TUNNEL „BELVEDER“

BOOK 5 WASTE WATER TREATMENT PLANT (WWTP)

Volume 5.1 Process design

Volume 5.2 Hydraulic design

Volume 5.3 Architectural design

Volume 5.4 Mechanical design

Volume 5.5.1 Electrical design – new TS

Volume 5.5.2 Electrical design – electrical equipment for the treatment process and SCADA

Volume 5.5.3 Electrical design – additional installations

Volume 5.6 Previous expropriation study






TERMS OF REFERENCE






TABLE OF CONTENT

1. TECHNICAL DESCRIPTION .............................................................................................................. 4

2. TECHNICAL CALCULATIONS .......................................................................................................... 7

2.1. CALCULATION OF CABLE CAPACITY................................................................................................... 7

2.2. CALCULATION OF VOLTAGE DROP...................................................................................................... 9

2.3. INDIRECT CONTACT PROTECTION - SYSTEM TN-C/S ....................................................................... 11

2.4. DETERMINATION OF LIGHTNING PROTECTION LEVEL .................................................................... 15

2.5. GROUNDING CHECK ............................................................................................................................. 17

2.6. CALCULATION OF FOUNDATION GROUNDING RESISTANCE ......................................................... 18

3. SPECIAL ADDENDUM ON THE MEASURES APPLIED AND SAFETY AT WORK ......................... 20

3.1. GENERAL ............................................................................................................................................... 20

4. GENERAL TECHNICAL REQUIREMENTS ...................................................................................... 21

4.1. GENERAL ............................................................................................................................................... 21

4.2. HIGH VOLTAGE CURRENT ................................................................................................................... 22

4.3. GROUNDING .......................................................................................................................................... 23

4.4. LIGHTNING PROTECTION SYSTEM ..................................................................................................... 24

5. LIST OF STANDARDS AND REGULATIONS .................................................................................. 25

6. MATERIAL SPECIFICATION DTS ................................................................................................... 26

6.1. RECAPITULATION ................................................................................................................................. 37

7. DRAWINGS ...................................................................................................................................... 38






1. TECHNICAL DESCRIPTION

STRUCTURE: Wastewater treatment plant (WWTP) - Budva which has the following units:

01 Mechanical treatment - Huber unit 02 Sand trap 03 Equalization basin 04 SBR – sequential batch reactor (basins) 05 Compressor station 06 Retaining reservoir 07 Pumping stations for water to filter 08 Dosage of AL-sulphate solution 09 Sand filters under pressure 10 UV disinfection 11 Monitoring station at the outlet 12 System for thickening of sludge excess 13 System for conditioning of sludge excess 14 System for the dehydration of sludge 15 Commanding building 16 Guard house 17 Auxiliary diesel generator 18 Transformer and medium voltage power supply

CONSTRUCTION LOCATION: Cetinje, Dobrsko selo SUBJECT OF THIS DESIGN (VOLUME 5.5.3) ARE MARKED STRUCTURES 1. ELECTRICAL INSTALLATIONS

• Connection of structures to the outer low-voltage network is executed according to the technical conditions of Electricity distribution company Cetinje;

• Power supply of structures is done from outer new DTS 10/0, 4 kV, 1x630 kVA, "NEW-WWTP" DTS has resolved by electrical design, volume 5.5.1 - Transformer station DTS 10/0, 4kV, 1x630kVA. Measuring of electrical energy consumption is at 10 kV side of the multifunction electricity meter of active and reactive energy, maximum indicator and TF receiver for registration of lower tariff;

• Main distribution board of the technological equipment has been installed in the commanding facility. All local distribution boards designed for the installations of general lighting, sockets and heating consumers, ventilation and air conditioning of individual buildings are supplied from the main distribution board.

• Installation of main supply cables is done by electrical design book F2 - Electrical equipment for the treatment process and SCADA; From the local distribution boards to the consumers, cables of PP-Y and PP00 0.6 / 1 kV, Cu, PVC / PVC type are being used. Laying of cables is visible on the wall, on the wall beneath the mortar, in the concrete and at the penetration points in the pipes of corresponding diameter.






• System of electrical lighting Lighting will be general and antipanic emergency lighting system,. It is anticipated according to the necessary brightness and space purpose. Modern fluorescent linear and compact tubes and metal halogen sources will be used as light sources. In the corridors, halls and stairways, as well as at evacuation routes, above the exit doors and places with larger number of people, installation of antipanic emergency lighting system is projected with own Ni-Cd batteries provided for the autonomy of work for a period of 1h. Luminaires are resistant to high temperatures and made of hard combustible halogen-free material. Due to a possible ceiling finishing work, proper ceiling recessed and ceiling mounted luminaires are foreseen. Level and quality of illumination is determined by the recommendations of IEC.

• Lighting control system: Local - switches. System of plugs and cables of consumers for heating, ventilation and air conditioning Setting the required number of single-phase and three phase sockets is foreseen for the consumers as well as the necessary number of general-purpose sockets.

• Outer lighting is foreseen according to user needs and technology requirements with HQL metal-halide light sources. Power supply and control of outer lighting is done from the guard house - manually and automaticaly (selection is done in a commanding building). The level of brightness is in accordance with the recommendations of IEC.

• Grounding and lightning protection system Classic lightning installation is foreseen, configuration according to the given basis and defined security zone. Ground electrode is foreseen as a ring foundation grounding. To foresee strips placed in the foundation, during concreting, in the lower layer below the hydroinsulation, with periodic welding for reinforcement and making of tapped and earth connection.

• Installation of heating and air-conditioning consumers Socket outlets for connection of electrical heating devices and split system are foreseen.

• Protections Protection against direct voltage is foreseen by proper selection and installation of equipment, which proper handling prevents the touch of parts under voltage .

Protection against indirect voltage is foreseen with automatic swithing off of power supply in the TN-C-S system.

Main potential equalization is foreseen by connection of all metal parts of the non-electrical installation on the busbar Cu 30x5mm, in a separate cabinet with a cover. Busbar is connected to the foundation grounding of the structure with FeZn tape 25x4mm. All outlets should be visibly and permanently marked, according to the installation and connected equipment.






Interior lightning protection system is, due to the very significant measurement and regulation equipment, upgraded with overvoltage protection. Appropriate surge outlets are provided in the main distribution box of technological equipment. Class of surge outlets in the building is B.

Additional potential equalizations are foreseen in all technical facilities by connecting all metal parts to the grounding hot dip galvanized tape FeZn 25x4mm on room wall, which is using the shortest way connected to the foundation grounding.

Special potential equalizations are provided in sanitary facilities, by connecting all metal parts on the busbar in the potential equalization box, with bonding conductor P/F 4mm². Busbar in the box is connected to the PE busbar in the supply board with bonding conductor P/F 6mm ².

Foundation grounding is provided by laying hot dip galvanized tape FeZn 25x4mm in the lower zone of the ground, under a layer of insulation. From foundation grounding, outlets for connecting lightning protection outlet lines, main and additional potential equalizations, metal door frames, gutter verticals etc. are foreseen.

External lightning protection system is foreseen with standard hot dip galvanized stripe arrester FeZn 25x4mm and the required number of outlets, set at the facade of the building, up to foundation grounding. At each outlet line, measuring - disconnecting joint s foreseen, on the wall at h = 1.6 m from the ground level. Type and place of arrester installation is in the calculated level of protection.






2. TECHNICAL CALCULATIONS

2.1. CALCULATION OF CABLE CAPACITY

Dimensioning of supply lines is based on:

1. permitted thermal stress

2. permitted percentage voltage drop

Selected conductor section must meet both criteria, and here we will check the criterion no. 1.

a) Current (3 phases) is calculated using the formula:

ϕcos3 ⋅⋅=

U

PI

j

(A)

where:

Pj - power (W)

U - line voltage (V)

cosϕϕϕϕ -power factor (1)

b) Current (single phase) is calculated using the formula

IP

U

j=

⋅ cosϕϕϕϕ (A)

where:

U – phase voltage

c) Based on such calculated current, for which the circuit is designed, selection of protection device and conductor section is done according to the JUS N.B2.743 and JUS N.B2.752.

For the calculated current I (A), selection of device is done, which protects the cable against overload, first higher rated current In (for engines with high starting currents, selection is made according to manufacturer).

Operating features of the device that protects the cable against overload, must fulfill two conditions:

1. Ib ≤ In ≤ Iz






2. I2 ≤ 1,45 Iz

where: Ib – is the design current, the actual current to be carried by the cable

Iz - is the current carrying capacity of the cable in the situation where it is installed

Iz = K x Ik - Ik – is the tabulated current for a single circuit at an ambient temperature of 30°C (JUS N.B2.752).

- K=Kt x Kn - correction factor

- Kt – is the correction factor for ambient temperature - JUS N.B2.752

- Kn – is the correction factor for grouping – JUS N.B2.752

In – is the rating of the protecting fuse or circuit breaker

I2 – is the operating current for the fuse or circuit breaker (the current at which the fuse blows or the circuit breaker opens)

• operating current during the specified time for switches

• fuse current during the specified time for fuses GI

• fuse current during the specified time for fuses GII

In of protection device I2/In STANDARDS melting fuses: up to 40A 4-10A 10-25A over 25A

2,10 1,90 1,75 1,60

IEC 269 VDE 0636

JUS N.E5.206

adjustable switch: up to 63A over 63A

1,35 1,25

IEC 157 VDE 0660 T.101

motor protection switch; all In

1,20

IEC 292 VDE 0660 T.1

VDE 0660 T.104

Thus defined overload protection does not provide complete protection in certain cases, such as exceeding current of prolonged duration, which is less than I2. During designing it was assured that circuits had not been exposed to prolonged low overloads.

Calculation results are presented in tables.






Relation Instal. Simultaneous Power Ib Type and section Id A Correction. Iz In K 1.45*Iz Comment

power power factor cable factors K

from to Pi(kW) k Pjm(kW) cosφ (A) (mm²) (A) K1 K2 (A) (A) (A)

DTS RO-1 202,22 0,7 141,55 1 215,32 PP00 4x240 297 D 1 1 297 250 1,60 269,16 YES

RO-1 RO-kpz 97,50 0,55 53,63 0,96 84,97 PP00 4x35 117 C 1 1 117 100 1,45 117 YES

RO-1 RO-p 7,18 0,70 5,02 0,96 7,9616 PP00 5x10 52 D 1 1 52 40 1,45 52 YES

RO-1 RO-sr 3,00 1,00 3,00 0,96 4,7536 PP00 5x16 67 D 1 1 67 40 1,45 67 YES

RO-kpz RT-po 21,16 0,55 11,64 0,96 18,441 PP00 5x10 54 C 0,8 1 43,2 40 1,45 43,2 YES

RO-kpz RT-pr 28,82 0,55 15,85 0,96 25,116 PP00 5x16 73 C 0,8 1 58,4 50 1,45 58,4 YES

RO-kpz RT-st 47,17 0,55 25,94 0,96 41,108 PP00 5x16 73 C 0,8 1 58,4 50 1,45 58,4 YES

RT-pr str.kr.12 3,00 1,00 3,00 0,96 4,7536 PP00 5x2,5 23 C 0,8 1 18,4 16 1,45 18,4 YES

Table: Selection of inlet lines in relation to the permanent allowed currents and overload protection check

2.2. CALCULATION OF VOLTAGE DROP

Dimensioning of supply lines is based on:

1. permitted thermal stress

2. permitted percentage voltage drop

Selected conductor section according to criteria no. 1 is checked using criterion no.2.

a) For three-phase line, percentage relative voltage drop is calculated using following formula

2

)(100%

US

Plu

j

⋅⋅

⋅=

∑γ

(%)

where:

l - cable length (m)

γγγγ - specific conductance (m/Ωmm² )

S - conductor section (mm² )

U - line voltage (V)

Pj - simultaneous stress (kW)

If the formula includes:






( )l Pj⋅∑ in kWm

- S in mm²

- γγγγ = 57 m/Ωmm² for copper

- V = 400V

We obtain

S

Plu

j∑ ⋅⋅=

)(012.0%

(%)

Above formula for aluminum conductor takes the form (γ = 36m/Ωmm² )

S

Plu

j∑ ⋅⋅=

)(019.0%

(%)

b) For single phase percentage relative voltage drop is calculated using following formula

2

)(2100%

US

Plu

j

⋅⋅

⋅=

∑γ (%)

where similar inclusion as in the (a) with U = 230V we obtain

u

l P

S

j% .

( )=

⋅∑0 0725

(%)

Above formula for aluminum conductor takes the form

u

l P

S

j% .

( )=

⋅∑0115

(%)

c) For motors (elevators, etc.) with high starting torque, it is necessary to calculate voltage drop when starting in their supplying line. Here, according to the manufacturer Ip =

n ⋅ In , so:

jnppj PnInUIVP ⋅=⋅⋅⋅⋅=⋅⋅⋅= ϕϕ cos3cos3






(

P PP

jel j= =η )

2

)(100%

US

Pnlu

j

p⋅⋅

⋅⋅=

∑γ

(%), ie.

2

)(100%

US

Plnu

j

p⋅⋅

⋅=

∑γ

(%)

Values of voltage drops should be less than the allowable voltage drops for each case, according to the regulations.

Calculation results are presented in table.

Relation Instal. Simultaneous Power Cable Type and section Section Voltage drop Comment

power power factor length cable total To permitted

from to Pi(kW) k Pjm(kW) cosφ (m) (mm²) % % voltage drop

DTS RO-1 202,22 0,7 141,55 1 30,0 PP00 4x240 240 0,219 0,219 satisfy

RO-1 RO-kpz 97,50 0,55 53,63 0,96 10,0 PP00 4x35 35 0,198 0,417 satisfy

RO-1 RO-p 7,18 0,70 5,02 0,96 45,0 PP00 5x10 10 0,292 0,511 satisfy

RO-1 RO-sr 3,00 1,00 3,00 0,96 10,0 PP00 5x16 16 0,024 0,244 satisfy

RO-kpz RT-po 21,16 0,55 11,64 0,96 15,0 PP00 5x10 10 0,225 0,643 satisfy

RO-kpz RT-pr 28,82 0,55 15,85 0,96 10,0 PP00 5x16 16 0,128 0,545 satisfy

RO-kpz RT-st 47,17 0,55 25,94 0,96 16,0 PP00 5x16 16 0,335 0,752 satisfy

RT-pr str.kr.12 3,00 1,00 3,00 0,96 12,0 PP00 5x2,5 2,5 0,186 0,731 satisfy

Table: Calculation of voltage drop

2.3. INDIRECT CONTACT PROTECTION - SYSTEM TN-C/S

Indirect contact protection by JUS N.B2.741 is effective if the protective device characteristics and the circuit impedance are such that in case of negligible impedance fault between phase and protective conductor or insulated conductive part, anywhere in the installation, automatic power off happens in the specified time. This requirement is satisfied if the following condition is fulfilled:

Z I Us a⋅ ≤ 0

where:






Zs - fault loop impedance comprising the source, under voltage conductor to the point of fault and the protective conductor between the fault point and source,

U0 – rated voltage to ground,

Ia - current that provides a protective device effect for the automatic power off within time duration specified in the table below:

U0 (V) td (s)

120 0,8

230 0,4 277 0,4

400 0,2

>400 0,1

Maximum time off, given in the table, meet for the final circuits which supplies sockets or directly without sockets class 1 hand devices or portable devices which are moved by hand during use.

Longer time off, not exceeding 5s, is allowed for power supply circuits and circuits that do not require time off given in the table.

Fault loop impedance is calculated using following formula:

Z R Xs p p= +

2 2

(Ω)

where:

Rp – ohmic loop resistance (Ω)

Xp - inductive loop resistance (Ω)

For the calculated value of faulty current, Ia, failure time off is read from the characteristics of the protective device (fuse, switch).

The protective device is well chosen if the following condition has been fulfilled:

t t d<

b) If the power supply of network is via the transformer, the upper limits are calculated as:

R R Rp t n

n

n n

= +=

=

∑1 (Ω);

X X Xp t n

n

n n

= +=

=

∑1 (Ω)

Rt - ohmic resistance of phase winding transformer on the low voltage side

Xt - inductive resistance of phase winding transformer on the low voltage side

Rn - ohmic resistance of certain sections of lines

Xn - inductive resistance of certain sections of lines






TRANSFORMER RESISTANCES

Ohmic and inductive resistance of transformer are calculated using following formula:

Ru V

St

r

nt

=⋅

⋅

2

100 (Ω, %, kV, MVA)

Xu V

St

x

nt

=⋅

⋅

2

100 (Ω, %, kV, MVA)

where:

V - line voltage (V)

Snt – power of the transformer (MVA)

uP

Sr

Cu

nt

=⋅100

(%), where PCu are copper losses (kW)

u u ux k r= −

2 2

(%), where uk is short circuit voltage (%)

For some transformers with typical power, we have following values (10/0.4kV):

Snt(kVA) uk(%) ur(%) ux(%) Rt(Ω/phase) Xt(Ω/phase)

250 4 1.30 3.78 0.0080 0.024

400 4 1.15 3.83 0.0060 0.015

630 4 1.03 3.87 0.0026 0.010 1000 6 1.35 5.85 0.0022 0.009

CABLE RESISTANCES

Ohmic and inductive resistance are calculated using general formulas:

R

l r r

n

f=⋅ +( )0

(Ω); X

l x x

n

f=⋅ +( )0

(Ω);

where:

l - cable lenght (km)

r0 - ohmic resistance of zero conductor cable (Ω/km)






rf - ohmic resistance of phase conductor cable (Ω/km)

x0 - inductive resistance of zero conductor cable (Ω/km)

xf - inductive resistance of phase conductor cable (Ω/km)

n - number of parallel laid cables to supply one low-voltage cabinet

Cables with characteristic sections have the following values (ohmic resistance of cables

are adjusted to a temperature of 70°C – working cable temperature, R70 = 1.2 ⋅ R20; conductor = copper)

S(mm² ) r(Ω/km) x(Ω/km) S(mm² ) r(Ω/km) x(Ω/km)

1.5 16.560 0.115 35 0.635 0.083 2.5 9.072 0.110 50 0.469 0.083

4 5.640 0.107 70 0.324 0.082

6 3.732 0.100 95 0.234 0.082 10 2.208 0.094 120 0.185 0.080

16 1.392 0.090 150 0.151 0.080

25 0.881 0.086 185 0.120 0.080

c) If the power supply of network is directly from the generator (without transformer) it shall be:

R R Rp g n

n

n n

= +=

=

∑1 (Ω);

X X Xp g n

n

n n

= +=

=

∑1 (Ω)

Rg - ohmic resistance of generator winding

Xg - inductive resistance of generator winding

Rn , Xn – cable resistances (previously discussed)

GENERATOR RESISTANCES

Inductive resistance of generator is calculated using following formula:

g

2

g

"

d

gS100

UxX

⋅

⋅=

(Ω/phase)

where:

Ug – operational voltage (kV)

Sg - generator power (MVA)






xd" - initial reactance of the generator (%) (12 - 15%)

Active resistance of the generator applies:

R Xg g= ⋅015.

(Ω/phase)

Calculation results are presented in table. Od Do S / SPE l *Rk *Xk RDIONICE XDIONICE åR åX ZS Ia ZS x Ia

(mm² ) (km) (W/km) (W/km) (W) (W) (W) (W) (W) (A) (V)

Trafo 630kVA 0,0026 0,01

DTS RO-1 240/240 0,03 0,12 0,08 0,0036 0,0024 0,0062 0,0124 0,0139 2700 37,43

RO-1 RO-kpz 35/35 0,01 0,635 0,083 0,00635 0,00083 0,01255 0,01323 0,0182 1000 18,24

RO-kpz RT-pr 16/16 0,01 1,392 0,09 0,01392 0,0009 0,02647 0,01413 0,03 400 12,00

RT-pr str.kr.12 2.5/2.5 0,012 9,072 0,11 0,10886 0,00132 0,13533 0,01545 0,1362 120 16,35

2.4. DETERMINATION OF LIGHTNING PROTECTION LEVEL

The goal of determination of protection is to decrease level of damage risk below maximum tolerable due to direct lightning into the protected object. Determining the appropriate level of protection for lightning protection installation can be provided based on the frequency of direct lightning strikes into the object Nd and the adopted frequency of lightning strike Nc. If the Nd ≤ Nc lightning protection system is not required. If Nd ≥ Nc computational efficiency of lightning protection system is Er = 1-Nc/Nd, lightning protection system is required, and protection level is determined by the table:

PROTECTION LEVEL EFFICIENCY

1. with additional measures E ≥ 0,98 I nivo 0,95 ≤ E ≤ 0,98 II nivo 0,90 ≤ E ≤ 0,95 III nivo 0,80 ≤ E ≤ 0,90 IV nivo 0,00 ≤ E ≤ 0,80

1. Determination of the adopted value of lightning strike Nc.

Value of Nc is estimated based on the analysis of the damage risk, considering factors related to the structure such as type of the structure, structure content, structure purpose, consequences of lightning strike to the structure.

Nc is determined from the realization:

Nc= 3 x 10-³ / C1xC2xC3xC4






Coefficient C1 (type of building construction), C2 (structure content), C3 (Purpose) and C4 (consequences of lightning strike to the structure) are taken from table B1 to B 4 (JUS N. B4. 801). For this facility following values are adopted:

C1=1; C2=1; C3=1; C4=1

For the adopted values:

Nc=0,003

2. Determination of the frequency of direct lightning strike Nd.

According to JUS N.B.801 article 4.2. average annual value of Nd is:

Nd=Ng Ae 10-6

where:

Nd - frequency of direct lightning strike (no.of strikes/year.)

Ae - equivalent receiving structure surface (m2)

Ng – density of lightning in the ground (no.of strikes/km2 year.)

3. Determination of Ng

If the value of lightning density in the ground Ng is not known, it can be approximated using the equation

Ng ~ 0,04Td1.25

where Td is the number of thunderstorm days during 1 year period taken from the isokeraunic map JUS N.B4.803 and for the area with the observed object, it is 49 so that the

Ng=5,185

4. Determination of Ae

According to JUS N.B4.801 article 4.2 equivalent receiving area is defined as the area of ground that has the same frequency of direct lightning strikes as structure. It is calculated from the geometric image constructions and depends on the position of the structure and terrain configuration. Since the observed object is located on the flat ground, equivalent surface is calculated from the formula:






Ae = a x b + 6h (a+b) + 9π x h2

where:

a and b - building sides to be protected (m) a=17,1m; b=11,2m

h - height of the protected building (m) h=14,5m

For this structure it is obtained:

Ae= 17,1 x 11,2 + 6 x 14,5(17,1+11,2) + 9 x 3,14 x 14,52 = 8595.3 m2

From the calculated values of Ng and Ae it is obtained

Nd = 5,185x8595,3x 10-6= 0,0445

Since the Nd> Nc lightning protection is required, efficiency E is

Nc 0,003

E ≥ 1- ----- = 1- ---------------- = 0,932

Nd 0,0445

and the required level of protection is II.

Spot width of the receiving system is 10 x 10m, a distance of outlet lines is 15m.

2.5. GROUNDING CHECK

Minimum grounding lengths of lightning protection system are given in figure 2 of JUS IEC 1024-1 standard.

in accordance with this standard, following can be applied:

• A type grounding (radial or vertical grounding)

• B type grounding (ring or foundation grounding)

In our case, type B is adopted (foundation grounding) and the mean geometric radius (r) of the grounding should not be less than l1:

1lr ≥

Area covered by a foundation grounding:






258,191 mP =

Diameter of the circle that has the same surface as the foundation of the building is:

π

PD

×=

4

π

1914×=D

mD 6,15=

Mean geometric radius is:

2

Dr =

mr 8,7=

Minimum length of the grounding is l1 = 5m and therefore:

lr1

>

which means that the foundation grounding is of sufficient length in terms of JUS IEC 1024-1 standard.

2.6. CALCULATION OF FOUNDATION GROUNDING RESISTANCE

FeZn tape of 25x4 mm was placed in the bottom layer of concrete during foundation concreting at 5 cm from the bottom surface of the foundation.

Specific resistance of concrete MB300 is 3500 Ω/m and the total resistance of concrete bed is

ρb = 3500 x 0,05 = 175 Ω/m

Specific ground resistance is ρz = 200 Ω/m thus the total resistance is

ρu = ρb + ρz = 175 + 200 = 375 Ω/m

Resistance of a contour made of ground is calculated by the formula






)

8ln(

2

2

ah

L

LRt

ππ

ρ=

L = 107 m, total length of the lead placed along the reinforcement – commanding building

h = 1,05 m, digging depth

a = 25 mm, length of a wider side of rectangular cross section of FeZn tape

Ω=

∗∗= 761,7)

05.1025.0

107*8ln(

1072

375 2

ππRt

Since 7.76 Ω is less than 20 Ω, grounding meets requirements set by the regulations.

Since this facility is connected to the system of joint grounding complex and to the lead laid in parallel with future VN cables DTS, the actual resistance value will be far less.

Head designer:

________________________ Momcilo Bubnjevic, B.Sc. Electrical

engineer






3. SPECIAL ADDENDUM ON THE MEASURES APPLIED AND SAFETY AT

WORK

3.1. GENERAL

Pursuant to the provisions of Law on safety at work (Official Gazette of the Republic of Montenegro no.79/04) Addendum on the safety at work was formed during preparation of technical documentation, which points to the dangers and hazards that can occur during the work.

Addendum contains following chapters:

4.1. Risks and hazards that can occur at structures, electrical plants and installations

4.2. Foreseen measures to eliminate risks and hazards

4.3. General notes and commitments

4.4. Conclusion

Head designer:


engineer






4. GENERAL TECHNICAL REQUIREMENTS

4.1. GENERAL

• These technical requirements are an integral part of the study and they are obligatory for the Contractor and Investor.

• Investor is obliged to delegate execution of work to the authorized corporate organization, for the Supervision of the works to determine a person who has authority for Supervision.

• Electrical installation should be done according to the attached plans, technical description and BoQ.

• Before commencement of the work, Contractor is required to check project at site and to make necessary corrections occured for any reason, in cooperation with Supervisory authority. He is also obliged to point out the necessary amendments and possible rational solutions to the Investor.

• For the all possible changes to the project and variations of any kind, both in terms of technical solution and in terms of material selection, the consent of the Investor must be obtained ie. of his professional Supervisory authority. In case of not doing this, the Contractor shall be responsible for all modifications and works performed based on them.

• Contractor shall keep a diary of works on this project. Unforeseen works or increase foreseen quantity and material consumption, as well as changes of works must be previously approved by the Investor or his Supervisory authority, and the Contractor is required to register them in the diary, which is further verified by the Supervisory authority or Investor.

• During the works, it should take care not to damage already constructed objects and installations. In addition, reinforced concrete and steel structures can be grinded and chase cut only with the written consent of the building Supervisory authority.

• Contractors (if more than one) are required to carry out the works in compliance with time, space and technics.

• Before commencement of the work, Contractor must be warned on the placement, of el. distribution box and boards and the main supply cables.

• All foreseen works must be performed by skilled personnel, taking into account the quality of work.

• Installations must be performed according to the text and graphic part of the project and the applicable regulations for this type of installation. All material to be installed must comply with the standards and be of premium quality. Material which does not meet this requirement can’t be installed.






• Contractor will register in documents all changes made during the work performance, and he is obliged to hand over one copy of the Investor.

• During the works, the Contractor shall take into account all requirements of hygiene-technical protection regulations.

• After completion of the work, Contractor will review the safety of all installations and facilities. In case of some deficiencies, they must be removed before submission to the Investor for handling.

• For the correctness of the work performed, Contractor gives warranty under the terms of the Agreement, from the date of certificate of acceptance. Any defect that occurs during the operation, and caused by using poor quality materials or unsolid workmanship, Contractor shall remove without any right to compensation.

• Contact voltage protection is performed by a special conductor (yellow-green). Metal parts of installation elements, as well as all metal construction of the building, which normally are not, but in case of insulation break can be under voltage, connect with a protective line.

• Functioning of protection against contact voltage must be checked before using the installation.

• On all distribution boxes must be warning plates, schemes (inside), marks of el. circles, switch positions, etc.

• Inspect the coupling of metal structures and perform bypass at places of bad joint within lightning protection system.

• After finalisation, it is necessary to make measurement of the ground resistance and issue certificate of completed measurement.

• Commissioning installations and facilities into continuous operation can be executed only upon the completion of inspection and license to use.

4.2. HIGH VOLTAGE CURRENT

• These technical requirements are addition and an integral part of the installation of high voltage current, and as such are required for Contractor. Everything that eventually has not been provided by description and by the project itself, but is necessary for the correctness of installations, the Contractor is required to perform on time and notify the Supervisory authority of the Investor.

• Installation must be performed in all according to the drawings, BoQ and JUS regulations applicable to this type of installation.

• Deviations from the project during the works, is not permitted without the consent of the Designer or Supervisory authority.






• PP conductors must be laid in the wall, beneath the mortar in a straight line only, and only horizontally and vertically, while diagonally laying is not allowed. In case of horizontal laying of PP conductor, make sure that the two conductors are located at least 10 mm between each other, and at least 30 cm from the ceiling. In case of vertical laying, make sure that the conductor is located from the wall opening wallcorners at least 15 cm.

• Protective layer of mortar over the PP conductor must not be less than 6 mm.

• Connecting of conductors shall be permitted only in distribution cabinets, distribution boxes and devices, using the VS and KV clips.

• Distribution box, microswitch box or plug box are laid directly into the mortared wall, and fixed with a plaster.

• Outlets for lighting points on the wall and ceiling must be done only by using boxes and cable glands.

• During parallel laying of telephone lines with power lines, ensure that space between them is not less than 20 cm.

• The distance between the telephone and signal cables must not be less than 10 cm. Crossing the phone lines and signaling systems with installation of high voltage current lines should be avoided. At the crossing points, signal lines - cables perpendiculary schould be placed in plastic pipes, and power lines in metal pipes.

• Installation of light switches set to the open side of the door, and at a height of 1.5 m, and schuko socket boxes at 0.8 m above the floor. Distribution boards place at a height of 1.5 m.

• After completion of lightning protection system, make connection of grounding GRO conductors to the common grounding electrode.

4.3. GROUNDING

• Galvanized steel strip 25 x 4mm will be used for ground as a material.

• Busbar for potential equalization, lightning outlets, etc. are connected to the ground electrode.

• When preparing the ground electrode, it is necessary to provide professional work and collaboration with the construction contractor.

• All outlets from the ground (for SIP, lightning leads, lift and telecommunication box guides) shall be of galvanized steel strip 25 x 4 mm. Interconnection of strips in the ground and for outlets to perform by welding or by crossing coupling JUS N B4 936.

• Contractor is required to register construction of the ground basis in a diary and construction book with certification of the Supervisory authority of the Investor.

• Upon the completion of works, the Contractor will provide a certificate of inspection and measurement of transient grounding resistance.






4.4. LIGHTNING PROTECTION SYSTEM

• When developing a lightning protection installation, Contractor is obliged to comply with technical regulations on lightning rod.

• Installation of lightning rod will be done with galvanized steel strip 25x4mm .

• Lines (of strips) must be placed over the appropriate supports at the proper distance.

• All metal masses on the roof (chimneys, climbing irons, gutters, antennas, cover metal sheets, etc..) should be connected to the lightning protection installation, using appointed materials.

• Lines in lightning installation must be derived from the as possible long pieces, the number of extensions must be minimized.

• While laying outlets in the facade beneath panels or mortar, lead should be previously protected from corrosion using coating based on bitumen.

• Joining of galvanized steel strips should be done with crossing couplings, and with appropriate couplings when connecting to the metal mass.

• Tested joints of lightning rod should be set at a height of 1.6 m from the ground level into the facade wall.

Head designer:


engineer






5. LIST OF STANDARDS AND REGULATIONS

In preparation of Final design, following rules and recommendations were used:

1. The Law on Spatial Planning and Construction (Official Gazette of the Republic of Montenegro no. 51/08).

2. The Telecommunications Law (Official Gazette of the Republic of Serbia no. 44/03)

3. The Law on Protection and Rescue (Official Gazette of the Republic of Montenegro no. 13/07, 05/08)

4. The Law on safety at work (Official Gazette of the Republic of Montenegro no. 79/04)

5. Regulation on technical standards for low voltage electrical installations (Official Gazette of SFRY no.53/88, 54/88 i 28/95)

6. Fire detection and fire alarms JUS-ISO 8421 / 95

7. JUS N.A5.070/1982. Degrees of protection of electrical equipment, provided by enclosures. Classification and type tests

8. JUS N.B2.741/1989 El. installation of low voltage. Protection against electric shock

9. JUS N.B2.743/1989 Electrical installations in buildings Low-voltage electrical installations -Safety requirements – Protection against overcurrent

10. JUS N.B2.751/1986. Electrical installations in buildings Selection and erection of electrical equipment regarding external influences

11. JUS N.B2.754/1986 Electrical installations in buildings Earthing arrangements and protective conductors

12. Instruction on doing telephone installation and gland, ZJPTT

13. Valid PTT regulations, standards for equipment, cables and fittings.






6. MATERIAL SPECIFICATION DTS

No. DESCRIPTION Unit Quantity

Unit price EUR

Total price EUR

Commanding building and guard house

A THIS BoQ CONSISTS OF:

A1.

Procurement, transport and storage of material, tools and equipment at construction site, as given in

certain items.

A2.

Delivery of all material mentioned in certain items and all small unspecified material required for complete

and qualitative construction of installation.

A3. Installation and connection as given in certain items according to valid regulations for qualitative work.

A4. Testing and commissioning in proper operation

already completed installation.

A5. Bringing into proper condition all eventually damaged

points at already performed works.

A6. All used materials must comply with applicable

standards and be of premium quality.

A7.

All works must be carried out by skilled personnel and fully in accordance to applicable regulations for

these types of work.

A8.

Besides the value of all necessary material and manpower, the price includes all taxes on labor and

material.

A9. Price includes the preparation of eventually

necessary shop drawing documentation.

A10. BoQ is given per unit of completely finished position.

A11. Final works and handing over installation to the

Investor.

1 INSTALLATION CABLES







Unit price EUR

Total price EUR

1.1 CABLES FOR POWER SUPPLY OF SOCKETS AND FIXED OUTLETS

The position includes the connection from distribution boxes to sockets and fixed outlets of general and technological purpose. Cables are laid on a pre-prepared routes in the wall and concrete in PVC pipes of the corresponding diameter

Type and cross section of cables are in accordance with copper lodes and PVC insulation. They are laid on/in the wall, beneath mortar in the PVC pipes.

1.1.1 PP-Y 3x2.5 mm² m 670 3.00 2,010.00

1.1.1 PP-Y 5x2.5 mm² m 75 4.15 311.25

total 1.1: 2,321.25

1.2 CABLES FOR POWER SUPPLY OF LUMINAIRES

Cables for luminaires shall be laid in PVC pipes previously embedded in the concrete walls and ceilings and in/on the wall under mortar.

Type and cross section of cables are in accordance with copper lodes and PVC insulation. Cables are laid on a pre-prepared routes in the wall and concrete in PVC pipes of the corresponding diameter

1.2.1 PP-Y 3x1,5 mm² m 820 1.94 1,588.75

total1.2: 1,588.75

TOTAL 1: 3,910.00

2. PVC PIPES







Unit price EUR

Total price EUR

Delivery, transport and installation during concreteing of walls, ceilings and floors, of below given pvc pipes.

Paying per pipe running meter:

2.1 Ø16mm (flexible) m 1650 1.81 2,990.63

2.2 Ø19mm (flexible) m 83 2.10 174.30

TOTAL 2. 3,164.93

3 DISTRIBUTION BOXES

Distribution box is designed for power supply of lighting, sockets, technological connections, fixed outlets, etc.

Case is with the door, lock and key. The box will contain construction for carring equipment, made of mounting rails.

Equipment is placed above the protective plate. Box dimensions are determined by the number of modules width 18 mm. Box case (its metal parts) is visibly bypassed with a protective rail (ground).

Warning plates and nameplats are set on box door.

Box should be installed on wall.

Box should be protected from moisture and other objects using IP-40.

Position covers all required materials, wiring wires, plastic channels, terminals, rails for neutral line connection, rails for connection of protective lines, marking numbers, etc.

3.1.

RO-p Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:

1 pcs. Four - pole current protection switch 415V, 25A, ∆I= 0,3 A, selective, for mounting on DIN rail, similar to ID "Merlin Gerin".

3 pcs of white LED indicator lamp, Un=230V, 50Hz, 0,3W, for mounting on DIN rail

4 pcs. single-pole circuit breaker C60N/10A, 6/10kA, type 'B", for mounting on DIN rail, similar to "Merlin Gerin".








Unit price EUR

Total price EUR


other small unspecified material: copper bus bars, cable glands and terminals, insulators, bolts, clips, etc.

Payment per box pcs 1 395.00 395.00

3.2.

RT-po Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:

1 pcs. four - pole current protection switch 415V, 25A, ∆I= 0,3 A, selective, for mounting on DIN rail, similar to ID "Merlin Gerin".




2 pcs. three-pole circuit breaker C60N/16A, 6/10kA, type 'B", for mounting on DIN rail, similar to "Merlin Gerin".





3.3.

RO-kzp Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:










Unit price EUR

Total price EUR


3.4.

RO-sr Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:




1 pcs. four - pole contactor 40A, for mounting on DIN rail, similar to "Merlin Gerin".

1 pcs. photo-relay, for mounting on DIN rail, similar to "Merlin Gerin".



3.5.

RT-pr Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:








other small unspecified material: copper bus bars, cable glands and terminals, insulators, bolts, clips,







Unit price EUR

Total price EUR

etc.


3.6.

RT-st Prisma Plus Pack dimensions HxWxD 1080x555x200mm, similar to "Merlin Gerin" or to the following incorporated equipment:








TOTAL 3. 2,205.00

4 LUMINAIRES

Luminaires are installed in full set with lampholders, bulbs, fluo and compact tubes, starters, fuses and

other equipment necessary for quality work.

4.1 Luminaire marked with FL1

Ceiling-mounted luminaire with casing and transparent diffuser made of injected, UV stabilized, V2 self-extinguishing, halogen-free polycarbonate, with polyurethane waterproof gasket and parabolic, shiny reflector type TITAN - BS103 2 x T26 36W/840, G13, 230V, IP65, electronic circuit equipment class







Unit price EUR

Total price EUR

A2, with light source of 36W/840. Supplier Buck.

Payment per piece. pcs 23 52.20 1,200.60


Ceiling-mounted luminaire with casing made of extruded aluminum with transparent polycarbonate diffuser, 418 RIGO 1 x T16 14W/840, G5, 230V, IP43, IK03, electronic circuit equipment, with fluo light source of 14W/840. Supplier Buck.

Payment per piece. pcs 7 76.25 533.75


Ceiling-mounted luminaire with transparent diffuser, type Linea DT 2xT16 28W/840, G5, IP40. Luminaire is delivered with electronic circuit equipment and fluo light source of 28W/840. Supplier Buck.



Ceiling-mounted luminaire made of white painted steel sheet 0.6mm thick, with double parabolic, Darklight, bright raster to limit flashing, made of MiroSilver aluminum; Light Output Ratio 82%, type ORIEN DL 414 4xT16 14W/840, G5, IP20, electronic circuit equipment and fluo light source of 14W/840. Supplier Buck.


4.5 Luminaire marked with FLC1

Ceiling-mounted luminaire made of injected, UV stabilized, V2 self-extinguishing, halogen-free polycarbonate, 1544 GLOBO 1 x A55 100W, E27, IP65, IK0. Luminaire comes with a 100W incandescent bulb, and assembly equipment. Supplier Buck.







Unit price EUR

Total price EUR


4.5 Luminaire marked with P1

EMERGENCY LIGHTING LUMINAIRE (IP40) - Ceiling-mounted anti-panic luminaire with local power in standby circuit, made of injected, UV stabilized, V2 self-extinguishing, halogen-free polycarbonate with transparent diffuser, AESTETICA 8SE3-40, 1xT16 8W, 230V, G5, IP40, work autonomy of 3 hours, electronic circuit devices, including battery, inverter, light source and the corresponding label on adhesive foil. Supplier Buck.


TOTAL 4: 10,487.45

5 INSTALLATION TOOLS

GENERAL: Positions include delivery, transport, storage at site, incorporation of installation material and tools of halogen-free plastic, etc. modular program -Mosaic "Legrand" in the color chosen by architect and user.

5.1

Single-phase "Schuko" plug P+N+PE 250V 16A, IP20 for wall mounting, full set with pvc dose 1xø 60mm and single decorative mask for horizontal mounting, similar to type Mosaic- "Legrand " pcs 43 18.75 806.25

5.2

Single-phase "Schuko" plug single P+N+PE 250V 16A, IP55 with cover for wall mounting and pvc dose, similar to Plexo -"Legrand" pcs 7 26.25 183.75

5.3

Single-phase "Schuko" plug double P+N+PE 250V 16A,IP20 for mounting in wall, full set with pvc dose 2xø60mm single decorative mask for horizontal mounting, similar to type Mosaic-"Legrand" pcs 15 30.00 450.00

5.4 Three-phase "Schuko" plug 3P+N+PE 250V 16A,IP20 for wall mounting, full set with pvc dose pcs 3 25.00 75.00







Unit price EUR

Total price EUR

ø 60mm and single decorative mask for horizontal mounting, supplier "Nopal".

5.5

Ordinary switches, 250V 10A, for wall mounting with PVC distribution box 1x ø 60mm single decorative mask for horizontal mounting, similar to type Mosaic-"Legrand" pcs 4 15.00 60.00

5.6

Single pole switches, 250V 10A, for wall mounting with PVC "OG" distribution box in protection IP44-55, similar to type Plexo 55 -"Legrand" pcs 31 20.00 620.00

5.7

Two-way switches, 250V 10A, for wall mounting with PVC "OG" distribution box in protection IP44-55, similar to type Plexo 55 -"Legrand" pcs 8 20.00 160.00

TOTAL 5: 2,355.00

6 POTENTIAL EQUALIZATION INSTALLATION

6.1 C-39. Delivery and installation in plumbing wet nodes of potential equalization box of type C-39

Full set is paid per piece. pcs 4 10.00 40.00

6.2

Production of copper clamps and connection of heating pipes, water supply and sewerage network using lead joints pads with the potential equalization box of type C-39. conductor NYM-J- 4 mm ², which is laid through the already foreseen PVC pipe diameter 16mm. Connection of C-39 with a protective busbar in the distribution box is done using cable NYM-J 6 mm²

Average length of the installation is 10m.

Full set is paid per piece. pcs 4 15.00 60.00







Unit price EUR

Total price EUR

TOTAL 6: 100.00

7 FINAL WORKS AND HANDING OVER INSTALLATION TO THE INVESTOR

7.1 After completion of the works on the previously mentioned installations, contractor is obligated to do:

- patching of walls at installation points

- removing of any technical aesthetic errors of executed installations in the fracility

- cleaning of premises and removal of construction waste.

Upon inspection of done works, to make all necessary regulated foreseen tests, such as:

- Measurement of cable insulation resistance, electrical equipment and devices of individual and entirely finished installation

- testing the functionality of devices and equipment as well as the functionality of the entire installation,

- testing the protection against contact voltage in the installation,

- measuring the voltage drop at the consumer’s connection

- measurement of transient resistance grounding, etc.

After measurements, the Contractor will make the protocol and provide Investor with all necessary certificates with verification of obtained values.

For all executed works and incorporated material procured by the Contractor, he is obliged to give a written guarantee in accordance with valid regulations and existing contractual obligations.

Issuing all necessary instructions for the subsequent maintenance is also the obligation of the Contractor.

7.2

Develop as-built design based on the certified survey done during the construction of the installation. Study must include all the changes that have occurred during the works and must be certified by an official stamp of the organization which made required







Unit price EUR

Total price EUR

surveys and by the Investor.

During the installation, all changes must be included to a copy of the study. The changes must be certified by the Contractor and the Supervisor.

TOTAL 7: 550.00






6.1. RECAPITULATION

RECAPITULATION OF HIGH VOLTAGE CURRENT:

1 INSTALLATION CABLES 3,910.00

2 PVC PIPES 3,164.93

3 DISTRIBUTION BOX 2,205.00

4 LUMINAIRES 10,487.45

5 INSTALLATION TOOLS 2,355.00

6 POTENTIAL EQUALIZATION INSTALLATION 100.00

7 FINAL WORKS AND HANDING OVER INSTALLATION TO THE INVESTOR 550.00

TOTAL HIGH VOLTAGE CURRENT: 22,772.38

Tax base: 22,772.38

VAT 17% 3,871.30

TOTAL INCLUDING TAX 26,643.68






7. DRAWINGS

1. General layout - External lighting and grounding

2. Commanding building – installation of lighting and outlets – basement plan

3. Commanding building – installation of lighting and outlets – ground plan

4. Commanding building – installation of lighting and outlets – floor plan

5. Gate facility – installation of lighting and outlets – plan

6. Commanding building – RO-1 – single-line diagram

7. Commanding building – RO-2 – single-line diagram

8. Commanding building – RO-kpz – single-line diagram

9. Commanding building – RT-po – single-line diagram

10. Commanding building – RO-pr – single-line diagram

11. Commanding building – RO-st – single-line diagram

12. Guard house – installation - RO-p – single-line diagram

13. Circuit lighting - RO-sr – single-line diagram

el instalacije Cetinje

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