Tender for AMC of DSPT in Srinagar (Gwl.) - Webline

3.6 The following maintenance should be performed at 3 monthly intervals for CCU.
(i) Clean the enclosure using a soft cloth/brush
(ii) Check cables for damages or deterioration of the sheath and repair any such defect with
insulating tape.
(iii) Verify that all cable connections are tight and corrosion free and that adequate strain
relief are provided for the cables.
(iv) Measure the battery, array and load voltage as described in relevant sections.
3.7 Measure the voltage present at the array cable plug in terminal quarterly. Verify that this voltage
is greater than 17 V. Record the voltage as the “Array Open Circuit Voltage” and keep proper
record at each DSPT Site.
3.8 Measure the current being generated by the array and record this reading. Under bright sunny
conditions the solar array should generate more than 0.5A
3.9 The electricity generated by the solar module is reduced if a large amount of dust is allowed to
be accumulated on the module front surface. Wash the front surface of the solar modules at least
once in a month with clean water & non abrasive cloth.
3.10 The battery being maintenance free does not require any routine maintenance. However, batteries
are to be ensured to be kept in charged condition. If the system is not in use,still the batteries
have to be charged.
Hence, the solar charge controller will prevent the battery from being over charged and keep the
battery healthy.
3.11 The controller also has monitoring points to measure the load voltage, battery voltage SPV
voltage, Load current, Battery current and SPV current. The current is measured across a
30A/75mV shunt, hence the 25mV of reading across the mentioned points for currents will be
equal to 1A. that is the scale of reading current is 25mV/Amp. These monitoring point values are
approximate for reference only.
3.12 The controller has a solar charge controller which will disconnect the SPV module after the
battery charges to 14.1V and reconnect the SPV module when the battery voltage falls below
13.6V thus keeping the battery under float charge between 13.6V and 14.1V to be checked.
3.13 Ensure the SPV module connection is firm to Array connector. Clean any evidence of corrosion
of battery connections and ensure that the terminals are tight.
3.14 Verify the other connection to the PCB connectors.
Check the load and allow the battery to be charged adequately by solar array before
reconnecting.
3.15 Check the SPV connection and clean the SPV panel. Charge battery to required level (for about 3
days) by SPV disconnecting the load
3.16 Collect the DSPT/Equipment spare accessories from SSA Centre to replace the faulty part and
return of the faulty equipment to SSA centre with proper receipt within 3 days on receipt of
complaint by the incharge of DSPT.
3.17 Any other work assigned by the DSPT incharge to contractor.
http://www.uttaranchal.bsnl.co.in/sg/ten_2_16_2_13.pdf