reasoned documents of specification for roof top solar panel on … · 2019. 10. 17. · accredited...

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Reasoned documents of specification for roof top solar panel on Non Ac coaches as per RDSO’s specification no. RDSO/PE/SPEC/AC/0186 – 2016(Rev. 0)

M/s DR AUTO

S. N RDSO SPECIFICATION

RDSO SPECIFICATION M/s DR AUTO RDSO’S REMARKS

1 6.1 Solar Panel Module or Array of 300Wp capacity

OK Acceptable

2 6.2 The rated voltage per module shall be 30V. OK Acceptable

3 6.3 The numbers of solar panels per coach shall be 16 and size of each panel shall 2m x 1m and maximum weight per panel 23kg.

Please specify if the size and weight given are of the panel only or with the mounting frame

Not Acceptable

4 6.4 Net voltage of the roof top solar panels shall be 120V DC.

OK Acceptable

6.5

The Solar Panels along with metallic fixing structure to be provided on roof shall not infringe the maximum moving dimension (MMD) of the Coach.

OK Acceptable

5 6.6

Microprocessor based charging controller to maintain the coach battery to the highest possible state of charge while protecting the battery from deep discharge (by the loads) or extended overcharge ( by photovoltaic array)level

OK Acceptable

6 6.7

Blocking diode, preferably a Schottky diode, connected in series with solar cells and storage battery to keep the battery from discharging through the cell when there is no output or low output from the solar cell, if such

All panels are provided with the diode. Acceptable

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diode is not provided with the panel itself.

7 6.8

The entire system shall be designed and built to withstand the environmental conditions encountered during run.

OK Acceptable

8 6.9

All wiring, enclosures and fixtures that are mounted outdoor must be resistant to high humidity conditions, corrosion, insects and dust intrusion.

OK Acceptable

9 6.10 The system shall be virtually maintenance free except for cleaning the top glass of solar panel depending on dust conditions.

OK Acceptable

10 6.11

All metal equipment cases and frames in the system shall be well grounded.

OK Acceptable

11 6.12

The main components shall be integrated in such a way as to allow replacement (in case of failure) with a similarly functioning component of a newer design or a different make / brand.

Kindly specify the makes for the proper functioning of the system.

Acceptable

12 6.13

Electronic components used in charge controller or elsewhere in the system shall generally meet the requirements mentioned as follows (documentary evidence in support of the same should be given): (i) All capacitors shall be rated for

maximum temperature of 105° C.

(ii) Resistances shall preferably be made

of metal film of adequate rating having

a tolerance of not more than 5%.

OK Acceptable

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(iii) Switching devices such as transistors,

IGBT MOSFETs etc. shall have

minimum junction temperature of 150°

C.

(iv) All devices shall have adequate

thermal margin at ambient temperature

of 55° C

(v) Fiber glass epoxy of grade FR 4 or superior shall be used for PCB boards having a nominal board thickness 1.6mm and copper cladding thickness of 70 microns for power cards and 35 microns for control cards. Both track width and spacing between the tracks shall be 0.5 mm nominal and in no case shall be less than 0.3 mm. Assembled PCBs shall be given a conformal coating.

13 6.14 Components and hardware shall be vandal and theft resistant. All parts shall be corrosion-resistant.

OK Acceptable

14 8.1

Individual Solar PV Panel should conform to IEC: 61215 Ed 2 or latest – Edition II, IEC: 61730 – I: 2007, IEC: 61730 – II: 2007, manufactured in a plant certified under ISO 9001: 2008 and also type tested by an accredited national/international testing laboratory. The Solar PV Panel should be made from single/poly crystalline Silicon Solar Cell connected in series. PV panels to be used in a highly corrosive atmosphere (coastal areas, etc.) must qualify Salt Mist Corrosion Testing as per IEC 61701.

OK Acceptable

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15 8.2

SPV panel shall contain crystalline silicon solar cells. The solar cell shall have surface anti-reflective coating to help to absorb more light in all weather conditions.

Please specify whether mono-crystalline or ploy crystalline silicon solar cells.

Acceptable

16 8.3 The Solar Panel module rating shall be 300Wp/module.

OK Acceptable

17 8.4 Fill factor of the panel shall not be less than 72%.

OK Acceptable

18 8.5

The solar panel should have toughened high transmissivity glass in front side of the panel for improved visibility and protection against environmental hazards (rain, hail and storm) and weather proof TEDLAR/POLYSTER back sheet.

OK Acceptable

19 8.6

The transparency of toughened glass used shall be > 91%, when measured in actual sunlight by placing the glass plate perpendicular to the sun’s rays through an air mass of 1.5.

OK Acceptable

20 8.7

The complete solar panel shall be ensured for water-proof sealing in an anodized Aluminum frame.

OK Acceptable

21

8.8

The output terminals of the panel shall be provided on the back of the solar PV panel.

OK Acceptable

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22 8.9

Terminal block shall be made of Noryl rubber or other suitable alternate materials with weatherproof design (minimum IP-65) and shall have a provision for opening for replacing the cables, if required.

OK Acceptable

23 8.10

The output of any supplied panel shall not be less than the rated output and shall not exceed the rated power by more than 5Wp. Each panel therefore has to be tested and its rating displayed.

OK Acceptable

24 8.11

Each PV panel must use a RF identification tag (RFID), which can be either inside or outside the panel laminate, but must be able to withstand harsh environmental conditions. The RIFD must contain the following information:- i) Name of the manufacturer of PV Panel

ii) Name of the Manufacturer of Solar cells

iii) Month and year of the manufacture (separately for solar cells and panel)

iv) Country of origin (separately for solar cells and panel)

v) I-V curve for the panel

vi) Peak Wattage, Im, Vm and FF for the panel

vii) Unique Serial No and Model No of the panel

viii) Other relevant information on traceability of solar cells and panel as per ISO 9000 series.

OK Acceptable

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25 8.12

The SPV panels shall normally be mounted on a structure which is designed to withstand a wind speed of 200 kmph. For this compliance, contractor’s certificate of conformity will be accepted.

OK

26 8.13

The panel junction boxes (if any) shall be certified as per IEC 61215. Else, they should have the same properties as mentioned for array junction boxes. If array junction boxes are used, they shall have the following properties: a) The panel/array junction boxes shall be

dust, vermin- and waterproof and made of Polycarbonate - Glass Fibre Substance (PC-GFS) thermoplastic. The enclosure should be double insulated with protection class II as per IEC 61439-1. Material and the protection class shall be marked on the enclosure.

b) The enclosure shall have a transparent front lid for enabling easy visibility.

c) The enclosures shall have IP 65/66 protection in accordance with IEC 60529. Third party conformance certificate is required to be given for IP 65/ IP 67 degree of protection.

d) Burning Behavior: Base part of Polycarbonate Enclosure shall be UL-94-V-0 compliant and Lid part of PC Enclosure shall be UL-94-V-2 compliant.

e) The enclosures shall have IK 08

OK Acceptable

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degree of protection for mechanical load.

f) The material used shall be halogen, silicon free conforming to resistance of hazardous substances (RoHS).

g) The enclosure shall have a usage

temperature rating of -10C to 55C.

h) The enclosure should be chemically resistant to acid, gum, petrol, mineral oil and partially resistant to benzene.

i) The material of the enclosure shall be UV stabilized.

27 8.14

The conversion efficiency of Solar PV Cells used in the panel shall not be less than 15% and that of the panel shall be not less than 13%.

OK Acceptable

28 9.1

An array junction Box shall be used to combine

the DC cables of the solar module arrays with

DC HRC fuse protection for the outgoing DC

cable(s) to the charge controller. A DC junction

box shall be mounted close to the charge

controller.

OK Acceptable

29 9.2

The DC junction box shall be of the thermo-

plastic IP65 DIN-rail mounting type and shall

comprise the following components and cable

terminations:

OK Acceptable

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i) Incoming positive and negative DC cables from solar panel modules.

ii) DC HRC fuses and 2 pole DC circuit breaker (the cables from the solar panel modules from the roof top will be connected to this circuit breaker on the incoming side).

iii) DC surge protection device (SPD), class 2 as per IEC 60364-5-53

iv) Outgoing positive and negative

30 10.1

The rating of microprocessor based controller shall be 110V DC and 30Amp.

OK Acceptable

31 10.2 The input voltage range shall be 90V to 135Volt DC.

OK Acceptable

32 10.3 Charge Controller shall be suitable for both LMLA as well as VRLA battery.

OK Acceptable

33 10.4 Charge controller shall be suitably mounted near the rotary junction box of the coach.

Acceptable

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34 10.5

Battery will be allowed to discharge up to 80%

of its capacity at end of autonomy days. In

such a situation charge controller shall

automatically boost charge the battery.

OK Acceptable

35 10.6

The controller shall have a “temperature compensation” feature.

OK Acceptable

36 10.7

The self consumption of the charge controller shall not be more than 10 mA at rated voltage and rated current.

OK Acceptable

37 10.8 It shall be capable of handling 120% of the panel’s rated current for one hour duration.

OK

Acceptable

38 10.9

The charge controller shall be compact in size, rugged, lightweight and easy to install in ABS plastic enclosure

OK

Acceptable

39 10.10

The Controller shall display the following status of battery using 3 LEDs:

Red LED - Low battery

Green LED - Battery on charge

OK

Acceptable

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Yellow LED - Battery fully charged.

40 10.11

The controller shall have the facility of recording the generation data e.g. current, voltage, power, Kwh/hour/day/month/year etc.

OK

Acceptable

41 10.12 The charge controller shall have the facility of downloading the data through USB.

OK

Acceptable

42 11.1

Cabling of the system shall be as short as

possible to minimize the voltage drop in the

wiring

OK

Acceptable

43 11.2

Electron beam cable shall be used as per RDSO’s specification no. ELRS/SPEC/ELC/0019(latest version).

OK

Acceptable

44 11.3

All wiring must be sized to keep line voltage losses to less than 3% in each sub circuit and to allow the circuit to operate within the ampere rating of the wire.

OK

Acceptable

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45 12.1

The photo voltaic (PV) module i.e solar panel shall be mounted on roof top of non AC Coaches on fixed metallic structure having adequate strength and appropriate design, which can withstand the load of the panel and high wind velocities and vibration & shocks encountered during the run of the train.

OK

Acceptable

46 12.3

The solar panel modules along with the fixing

structure shall be within maximum moving

dimension (MMD) of the coach.

OK

Acceptable

47 12.4

The prospective installer shall specify

installation details of the solar PV panel and

the support structures with lay out drawings

and array connection diagram and submit it to

Zonal railway. Zonal Railway shall submit it to

RDSO along with their comments for approval.

The work shall be carried out as per the

design approved by RDSO.

OK

Acceptable

48 13.1

Full protection against open circuit, accidental short-circuit & reverse polarity shall be provided.

OK

Acceptable

49 13.2

Adequate protection shall also be incorporated under no-load conditions (i.e. when the system is ON & the load is removed.

OK

Acceptable

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50 13.3

If any other protection is necessary, the same will be deemed to be a part of the specification.

Acceptable

51 13.4

The above technical requirements are given

for general guidance only. The

supplier/manufacturer shall submit the detailed

design of the complete solar lighting system

considering the specific location, isolation,

nature of load etc.

OK

Acceptable

52 14.0

The installation shall be done by the

supplier/manufacturer, which is responsible for

its performance and direction of installation &

ensures structural stability. The supplier shall

conduct a detailed site assessment. The PV

installer shall obtain data specific to the site,

rather than relying on general data.

OK

Acceptable

reasoned documents of specification for roof top solar panel on … · 2019. 10. 17. · accredited...

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