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7. BATTERIES
WARNING
! Do not smoke or allow sparks, flames or other sources of ignition
around batteries. Hydrogen gas generated by charging batteries
is explosive.
! Wear an acid resistant apron and face shield or goggles when
servicing the battery. If electrolyte is spilled on skin or clothing,
flush immediately with large quantities of water.
! Take out the metalic things in your wrist and protect your
wrist and hand.
! Disconnect the battery negative (earth) lead first and reconnect
last.
! Always ensure that battery charging is carried out in a well
ventilated area.
The starting batteries should be located as close as possible to
the generating set while still being accessible for servicing. This
will prevent electrical losses from long cale that could impact
on the engine starting capability of the batteries.
7.1 BATTERY MAINTENANCE
1. Keep the top of the battery and its terminals clean.
2. Cover the battery terminals and its connections with vaseline.
3. Tighten the terminals but not tighten it hardly.
4. Control the electrolyte level periodically. It must be 10 mm.
above the plates.
5. Control the abrasion in the charge alternator belt and check
periodically the belt tension according to the producers
recommendation.
6. Ensure that your battery is not uncharged.
7.2 CONTROL OF THE BATTERY
Conduct an inspection every time before testing the battery.
1. A white powdered element causes abrasion to the pole-heads,
its surndings and the connections. Remove the connections and
wash them with hot water to purify the axidation. Reconnect
it and coat with vaseline.
2. Check if any untightened connections exist.
8. ELECTRICAL CONNECTION
Only fully qualified and experienced electrical technicians should
carry out electrical installation, service and repair work.
WARNING
! Make electrical connections in compliance with relevant Electrical
Codes, Standards or other requirements.
8.1 CABLING
Due to movement of generating sets on their vibration mounts,
the electrical connection to the set should be made with flexible
cable.
The cable should be protected by laying it in a duct or cable tray.
The cable must be suitable for the output voltage of the generating
set and the rated current of the set. In determining the size,
allowances should be made for ambient temperature. method of
installation, proximity of other cables. etc.
All connections should be carefully checked for integrity.
Current carrying capacity of power cables that will be used for
generator and the cable cross sections which must be used according
to the generator powers has been given in (table 8.1) an ambient
temperature of 40
°
C.
On the other hand, there is a one more important point while cable
cross sections are being selected. If the distance between load and
generator is too length, voltage falling at the load side can be too
much at the transient current duration. In this case you should
calculate the cable cross sections with electrical formula which has
been given below.
e= x L x x (R Cos
j
+ X Sn
j
)
e : Voltage drop (v)
L : Cable length (meter)
: Current (Amper)
R : Resistance of cable (ohm/m)
x : Reactance of cable (ohm/m)
8.2 PROTECTION
The cables connecting the generating set with the distribution
system are protected by means of a circuit breaker to automatically
disconnect the set in case of overload or short circuit. (Manual
models only).
