5
REV D
60706-231
INTRODUCTION
INTENDED USES
The EC18000VE engine generator set has been designed primarily
for heavy duty commercial use. A 240 volt receptacle is provided in
the control panel to plug in your loads. The EC22000VE is hard-wire
connectible only. These units are dual wound generators, therefore
the 120 volt loads must be equally split with 1/2 of the rated capacity
available on each of the two 120 volt circuits.
These units require large quantities of fresh air for cooling the engine
and generator. For safety, long life and adequate performance, these
units should never be run in small compartments without positive fresh
air flow.
RESTRICTED USES
DO NOT
install and operate this generator in a small compartment.,
i.e. generator compartments of vehicles, motor homes or travel
trailers. These compartments will not allow enough free flow of fresh
air to reach the engine generator set for cooling and will cause the
unit to overheat, damaging both the engine and generator. Small
compartments will also develop hot spots where there is very little air
flow and may cause a fire.
PLEASE NOTE
There are 3rd party companies making enclosures for
generators that have been properly engineered. The use of these 3rd
party enclosures is acceptable as long as they have been certified and
meet current code.
DO NOT
attempt to operate at 50 cycles. These units are designed and
governed to operate at 60 cycles only.
UNIT CAPABILITIES
GENERATOR CONNECTIONS
The diagram below represents this 15,000 watt (rated output)
generator. A & B represent the 120 volt output legs of this generator.
Up to 7500 watts at 120 volts (45 Amps) can be drawn from the
receptacles attached to either A or B output legs. This generator is
capable of producing 62.5 Amps of 240 volt current at C. Check the
appliance or tool nameplates for the current and voltage to insure
compatibility. Remember that power taken from C reduces the power
available at equally both A and B and vice versa.
Check the appliance or tool nameplates for the current and voltage
to ensure compatibility. Remember tha power utilized from C reduces
the power available from both A and B and vice versa. The EC22000
utilizes the same format with A and B being 9500 Watts and C being
19,000 Watts.
STARTING ELECTRIC MOTORS
Electric motors require much more current (amps) to start them than to
run them. Some motors, particularly low cost split-phase motors, are
very hard to start and require 5 to 7 times as much starting current as
running current. Capacitor motors are easier to start and usually require
2 to 4 times as much starting current as running current. Repulsion
Induction motors are the easiest to start and require only 1 1/2 to 2 1/2
times as much starting as running current.
Most fractional horsepower motors take about the same amount
of current to run them whether they are Repulsion Induction (RI),
Capacitor (Cap), or Split-Phase (SP) type.
If the electric motor is connected to a hard starting load such as an air
compressor, it will require more starting current. If it is connected to a
light load, or no load such as a power saw, it will require less starting
current. The exact requirement will also vary with the brand or design
of the motor.
Self-exciting generators respond to severe overloading differently than
utility power. When overloaded, the engine is not able to supply enough
power to bring the electric motor up to operating speed. The generator
responds with high initial starting current, but the engine speed drops
sharply. The overload may stall the engine. If allowed to operate at very
low speeds, the electric motor starting winding will burn out in a short
time. The generator winding might also be damaged.
CAUTION: EQUIPMENT DAMAGE
Running the generator set under these conditions may result in
damage to the generator stator as well as the motor winding.
The heavy surge of current required for starting motors is required for
only an instant. The generator will not be damaged if it can bring the
motor up to speed in a few seconds of time. If difficulty is experienced
in starting motors, turn all other electrical loads off and if possible
reduce the load on the electric motor.
