PAGE 14 — GDP-5000H A.C. GENERATOR— OPERATION AND PARTS MANUAL — REV. #2 (07/23/08)
GDP-5000H — INSTRUMENTATION
Power Outlets
The generator has the following single and 3-phase
receptacles.
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Single Phase
One Duplex NEMA (GFCI) 5-20R (120V, 30 Amp)
One Twist Lock NEMA L5-30R (120V, 30 Amp)
One Twist Lock NEMA L6-20R (240V, 20 Amp)
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3- Phase
ThreeTwist Lock NEMA 7410 (240V, 30 Amp)
Full Power Switch
The unit is provided with a full power switch. Figures 2 and 3
show simplified wiring diagrams of the dual voltage system.
When the full power switch is in the 120 volt (up) position,
you can take up
full rated power
of the generator at 120
volts from the single duplex receptacle, single locking type
120 volt receptacle, or a combination of these receptacles
as long as the total load does not exceed the generating set
capacity.
Figure 2. 120 V Simplified Diagram (Switch Up)
Figure 3. 120/240V Simplified Diagram (Sw Dn.)
When the switch is in the 240 volt (down) position, you can
take up to half of the rated power of the generating set at
120 volts from the duplex receptacle and up to half of the
rated power of the set at 120 volts from the locking type 120
volt receptacle; or full rated power of the set at 240 volts
from the locking type 240 volt receptacle.
NOTE
When the switch is in the 120 V position, the
locking type 240 volt receptacle cannot be used.
CAUTION :
When using a combination of dual
receptacles, total load should not exceed
the rated capacity of the generator.
60 Hz Circuit Breaker
This breaker protects the generator from short circuiting or
overloading from the 60 Hz single phase load.
The 180 Hz Leakage Breaker
The 180 Hz leakage breaker (Figure 4) is a earth leakage
breaker with the following conditions:
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The circuit is broken when the load side shorts or there
is over current.
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During use it detects when there is defective insulation
on the load side and breaks the circuit in response.
Idle Control Switch (both 60 and 180 Hz)
The unit is provided with an automatic idle control for noise
suppression and fuel cost reduction. The automatic idle
control automatically engages under a no-load condition.
With the automatic idle control switched “ON”, the engine
revolutions will automatically drop to about 2500 rpm (low-
speed operation) within 3 seconds after the load stops. When
the operation is resumed, the engine speed is automatically
increased to about 3600 rpm (high-speed operation) as soon
as the load is connected.
Fuel Gauge
The fuel gauge is located on the fuel tank and allows easy
monitoring of the fuel level.
AC Voltmeter
This voltmeter indicates output voltage for both 60 and 180
Hz phases. In addition this voltmeter can also be used as a
diagnostic tool.
If the voltmeter indicator (needle) is elow the rated voltage,
engine problems may exist (low/high RPM's). To prevent
damage to the generator or power tools turn the generator
OFF and consult your authorized Multiquip service dealer.
