Kubota J106-STD Operator's Manual page 31

2. Recommended capacity of electrical
devices
APPLICATION RANGE
You can operate the J-series generator in the following
range.
Typical
Apparatus
Light and
heaters
J106 5.5 kW
J107 6.5 kW
J108 8 kW
J110 10 kW
J112 12 kW
J114 14 kW
J116 16 kW
J119 18.8 kW
J310 8 kW
J313 10 kW
J315 12 kW
J318 14 kW
J320 16 kW
J324 18.8 kW
A Keep an inverter load below 50% of the generator
capacity.
A Make sure that total active mercury lamp load is below
30% or so of the generator capacity. Turn on the
mercury lamps one by one. Be careful not to turn off
the lamps and on again immediately. The generator
voltage may rise to extremely high levels and the AVR
may get damaged.
A Before turning on the lamps again, wait for 10 minutes
or so until the lamps cool down enough.
A The data shown above is only a guideline to
approximate load capacities and may vary from
generator model to generator model, with different
types of loads at rated outputs. These values may be
different from actual applications because of the input
characteristics peculiar to each load.
PREPARATION TO SUPPLY THE ELECTRIC POWER
Commutator Induction
motor motor
2.8 kW 0.8 kW
3.3 kW 0.8 kW
4.0 kW 1.2 kW
5.0 kW 1.6 kW
6.0 kW 1.6 kW
7.0 kW 2 kW
8.0 kW 2.4 kW
9.4 kW 2.4 kW
5.0 kW 3.7 kW
6.3 kW 3.7 kW
7.5 kW 4.4 kW
8.8 kW 5.5 kW
10.0 kW 5.9 kW
11.8 kW 7.4 kW
A Connecting a motor.
When connecting to a line starting motor, these
generators may be used to start a submerged pump of
3.7kW, 5.5kW, 7.5kW (three phase). When starting
the motor, the voltage drops immediately. The circuit
may be opened if an electromagnetic switch is
connected to the same circuit. When connecting two
motors or more, make sure the total current capacity
of the motors does not exceed the total rated current.
A Connecting to lights and electric heaters.
When connecting to lights or electric heaters, the
generator can be used up to the rated capacity. When
using a single phase, it can be used up to the rated
current.
A Power factor calculations.
The power factor calculation is used to determine
input of the electrical devices.
AC devices
Electric power (W)
= Voltage (V) Current (A)
Power factors of commonly used devices are listed in the
following table.
Load type
Single-phase induction motors
3-phase induction motors
Electric heaters, incandescent
lamps
Commutator motor
Fluorescent lamps, mercury
lamps
AC arc welder
A Ordinarily, a motor is rated in kW. This does not refer
to motor output.
Motor input (kVA)
Motor output (kW)
=
Motor efficiency
A If a lighting system is employed together with some
types of computers and inverter air-conditioners and/
or the regulated power supply for TV sets, the lights
might suffer flickering. This phenomenon does not
indicate a fault of the generator: it is caused by poor
matching between the above-mentioned regulated
power supply and the generator's automatic voltage
regulator. In such a case, modify the load combination
to eliminate the flickering.
15
Power factor
Power factor
0.4 to 0.75
0.65 to 0.85
1.0
0.8 to 0.95
0.4 to 0.9
0.4 to 0.6
power factor