4.12.2 Protection:
The cables connecting the
generating set with the distribution system are
protected by means of a circuit breaker to auto-
matically disconnect the set in case of overload
or short circuit. (Manual models only).
4.12.1 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 has been given in table
4.6. and the cable cross sections which must be
used according to the generator powers has been
given in table 4.7.1-4.7.2
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 Ø)
e : Voltage falling (volt)
L : Cable length (meter)
: Current (amper)
R : Resistance of cable (ohm/m)
x : Reactance of cable (ohm/m)
18
Keep the top of the battery and its terminals
clean.
Cover the battery terminals and its connections
with vaseline.
Tighten the terminals but not tighten it hardly.
Control the electrolyte level periodically.
It must be 10 mm. above the plates.
Control the abrasion in the charge alternator belt
and check periodically the belt tension according
to the producers recommendation.
Ensure that your battery is not uncharged.
4.11.1.2 Battery Maintenance
Conduct an inspection every time before testing
the battery.
A white powdered element causes abrasion to
the pole-heads, its surroundings and the
connections. Remove the connections and wash
them with hot water to purify the axidation.
Reconnect it and coat with vaseline.
Check if any untightened connections exist.
Sulphuric acid density and its charge situation
has been determined by using a hydrometer.
Dont add distilled water.
Keep the barrel part of the equipment in the
vertical position and pull on the sufficient amount
of electrolyte. Inside the tube there must be a
free float and it should be readable at the eye
level.
Evaluation is as the following;
Between 1.270 and 1.280 density level is fully
charged,
Between 1.220 and 1.230 density level is half
charged,
Between 1.150 and 1.220 density level is low
charged.
4.11.1.3 Testing The Battery
1.
2.
3.
4.
5.
6.
1.
2.
Ensure that all battery connections are correct
and batteries are always charged. After that there
is not any procedure for this batteries.
4.11.2 Maintenance Free Batteries
Only fully qualified and experienced electrical
technicians should carry out electrical installation,
service and repair work.
4.12 ELECTRICAL CONNECTION
Make electrical connections in compliance with
relevant Electrical Codes, Standards or other
requirements.
WARNING:
!
4.11.1.4 Hydrometer Test
1.
2.
