Tweco Raider 10,000 Pro - Manual (Page 18)

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local personnel and follow all applicable codes for safe
and proper installation.
Before the generator may be used to supply power, the
installer must first become familiar with and meet all
codes applicable to the installation of an auxiliary
generator. It is the installer's responsibility to follow the
applicable rules from the National Electrical Code (NEC),
state, local, and OSHA codes for the installation and use
of auxiliary power generators.
LOAD EVALUATION
Before connecting or operating the auxiliary power
generator, the installer must determine if the generator is
capable of supplying adequate power for a specific
application. Load and generator evaluation is essential for
satisfactory generator and equipment operation.
TYPES OF LOAD
Load requirements depend on the type of load connected
to the generator. There are two types of loads, resistive
and non-resistive. A resistive load, such as a light bulb,
requires a constant amount of power from the generator.
A non-resistive load, such as a portable grinder, requires
variable amounts of power from the generator. Because a
grinder requires more power for motor starting and is
rarely used with a constant, even pressure, the load
requirements can change greater than the operator
anticipates.
RUNNING LOAD REQUIREMENTS
The total running load applied to the generator is
calculated by adding up all the individual loads. Some
requirements are rated in amperes, others in watts. The
requirements for most equipment is provided on its
nameplate.
Example 1: If a drill requires 5 amperes at 115 volts,
calculate its running power requirements in watts.
VOLTS x AMPERES = WATTS
115V x 5A = 575W
Therefor, the individual load applied by the drill is 575
watts.
Example 2: If a light bulb is rated at 200 watts, the
individual load applied the light bulb is 200 watts. If
three 200 watt light bulbs are used with the drill from
example 1 add the individual loads to calculate total load.
(200W + 200W + 200W) + 575W = 1175W
Therefore the total load applied by the three light bulbs
and drill is 1175 watts.
Motor-starting Requirements
Starting amperage requirements are many times the
running amperage of the motor. Starting requirements
must be determined to assure that the generator is capable
of starting the motor without damaging it. This can be
done by examining the motor nameplate and identifying
the code letter specifying the starting kVA/HP required.
Motor Start
Code Leter
KVA/HP
G 6.3
H 7.1
J 8.0
K 9.0
L 10.0
M 11.2
N 12.5
P 14.0
If the kVA/HP requirement, motor horsepower, and
voltage rating are known, the starting amperage can be
calculated.
Example: Calculate the starting amperage required for a
230V, ¼ HP motor with a motor start code of G.
Equation
KVA/HP x HP x 1000
= STARTING AMPERAGE
VOLTS
Volts = 230
HP = ¼
Code G results in kVA/HP = 6.3
6.3 x ¼ x 1000
= 6.85A
230
Therefore, starting the motor requires 6.85 amperes.
If a code letter is not present on the motor nameplate,
approximate starting amperage is equal to six times
running amperage. This is a reasonable approximation for
all applications where the generator rated amperage is at
least twice the motor requirement. If the generator-to-
motor-size ratio is less than 2:1 acquire the needed
information to properly determine the motor-starting
requirement.
TECHNICAL SPECIFICATIONS