COMPREHENSIVE MAINTENANCE OF SOLAR PLANT AND CONNECTED ITEMS AT VARIOUS LOCATIONS IN SUBROTO PARK

Comprehensive maintenance of 420 kwp Solar power plant at Subroto Park to ensure maximum solar energy is fed to grid including the contractor will have to carried out inspection/check and maintenance of following equipments as given below: (i) Trouble free operation of the Solar Power Plant. (ii) Monitor the performance of the Solar Power Plant by data logging. (iii) Monthly report preparation & reporting to MES on performance of Power Plant (iv) Frequent testing of plant equpment by 'Walk Down' checks to internal condition of equipments such as module performance, inverter test, monitorting system testing etc careful logging of operation data and periodically processing it to determing abnormal or slowly deteriorating conditions careful controland supervision of operation conditions. (Wide and rapid variations in voltage and frequency conditions to contribute to increased maintenance) (v) Inspection and maintenance of the all Cable and connection box. (vi) Inspection and maintenance of the all Solar panels/ PV modules (1403 Nos). (vii) Inspection and maintenance of the all solar wiring connected to different devices (viii) Inspection and maintenance of Solar PV Arrary. (ix) Inspection and maintenance of Instruments . (x) Inspection and maintenance of junction box . (xi) Inspection and maintenance of wiring . (xii) Inspection and maintenance of Grid inverters (10 Nos) , attend to the emergency break down of the components. Make Chinta. The following check and work carried out in maintenance of grid inverter as given. (a) Remove any excess dust in heat sink and ventilations.This shall only be done with a dry cloth and brush (b) Check and clean that vermin have not infested the inverter , Typical signs of this include Spider webs on ventilation grills or waps nest in heat sinks. (c) Check functionality ,e.g automatic disconnection upon loss of grid power supply,at least once a month (d) Verify the state of DC/AC surge arrestors,cable connection and circuit breakers monthly (e) Clean and replace air filters. (f) Contractor also provide skilled technician and labour for attending the fault occurred anywhere in solar system with in 24 hours of fault occurance and rectified the same within 48 hours of fault occurance without affecting the generation of solar system Note:- (for item i to xii). The check / inspection schedule and complete description of work carried out in maintenance Schedule of above given items as per PS clause. All reports of inspection and maintenance have to be submitted to deparment time to time. (xi) The check / inspection of data acquistion system . Note:- (for item no x): (a) Replacement of unserviceable parts shall be measured and paid for separately (b) Contractor will supply well experienced and well conversant manpower against solar plant complaints,at a time for attending fault all working days including sunday and all Holidays. (c) Contractor shall provides all tools and plants as required (d) In case of failure to rectify the fault within 48hours after attending the fault a penal recovery shall be made from contractors due @ Rs 500/- per day for each fault/complaint.

Cleaning of Solar panel fortnightly (1403 Nos at various locations) using water properly. The following things shall be kept in mind during cleaning (a) use water and a soft sponge or cloth for cleaning (b) Do not use detergent or any abrasive material for panel cleaning (c ) Iso-propyl alcohol may be used to remove oil or grease stains (d) Do not spray water on the panel if panel glass is cracked or the back side is perforated (e) Wipe water from module as soon as possible. (f) Use proper safety kit while cleaning (g) The module should not be cleaned when they are excessively hot.Early morning is particularly good time for module cleaning (h) Ensure that the module terminal connections are not exposed while cleaning ;this poses a risk of electric shock.

Supply and fix in repair Solar PV module complete with necessary mounting arrangements, clamps, nuts, bolts, wiring connections and accessories including testing and commissioning complete all as specified and directed.

Supply, fixing, testing and commissioning of 50 KVA, 50 Hz+ 3 Hz (minimum) 3 phase 400V,76A DTH<3% at nominal power inverter suitable to convert DC power of solar PV module / array to AC for further feeding to grid & conforming IEC-61683 of efficiency, IEC-62109 (1&2) or equivalant for safety & IEC-62093 for reliab9ility. The input D.C tech specification of inverter are as under-input (DC):- Max DC Power: 62.6 KWp,28 KWp MPP range - 520-800V Max Current: 100A No of MPPT trackers: 2 No of input string:10

Supply, fixing, testing and commissioning of 30 KVA, 50 Hz+ 3 Hz (minimum) 3 phase 400V,46A DTH<3% at nominal power inverter suitable to convert DC power of solar PV module / array to AC for further feeding to grid & conforming IEC-61683 of efficiency, IEC-62109 (1&2) or equivalant for safety & IEC-62093 for reliab9ility. The input D.C tech specification of inverter are as under-input (DC):- Max DC Power: 28 KWp MPP range - 480-800V Max Current: 68A No of MPPT trackers: 2 No of input string:6

Supply, fixing, testing and commissioning of 20 KVA, 50 Hz+ 3 Hz (minimum) 3 phase 400V,32A DTH<3% at nominal power inverter suitable to convert DC power of solar PV module / array to AC for further feeding to grid & conforming IEC-61683 of efficiency, IEC-62109 (1&2) or equivalant for safety & IEC-62093 for reliab9ility. The input D.C tech specification of inverter are as under-input (DC):- Max DC Power: 25 KWp MPP range - 470-820V Max Current: 44A No of MPPT trackers: 2 No of input string:4

Cutting of tree branches of surrounding area of solar panel installation properly by using manually/by Machine complete all as specified and directed by engr -in -charge. Notes:-(a) while cutting of grass ,take care that no solar panel get damaged (b)The Garbage that comes out after cutting has to be removed at location as directed.

Taking down Old unserviceable PV Surge protector , Supply and fixing PV surge protector having Max PV operating voltage 1060V,Nominal discharge current 20KA,Max discharge current 40KA equivalent to CITEL DS50PV-1000 including necessary fitting arrangement and testing used in solar power plant complete all specified and directed.

Taking downOld unserviceable Photovoltic Fuses ,Supply and fixing Photovoltic Fuses having operating voltage 1000V, current 32A, equivalent to make Ferraz mersen USM1IHEL including necessary fitting arrangement and testing used in solar system complete all specified and directed.

Taking down Old unserviceable Data Surge protector , Supply and fixing Data surge protector having Max DC operating voltage 15V ,Max discharge current 20KA equivalent to CITEL DLA-12D3 including necessary fitting arrangement and testing used in solar power plant complete all specified and directed.