Lincoln Electric Vantage 549X, Manual, Page: 15 / 54

A-7
INSTALLATION VANTAGE
®
549X
STANDBY POWER CONNECTIONS
The Vantage
®
549X is suitable for temporary, standby or
emergency power using the engine manufacturer’s recommended
maintenance schedule.
The Vantage
®
549X can be permanently installed as a standby
power unit for 240 VAC, 3 wire, 50 amp service. Connections must
be made by a licensed electrician who can determine how the
120/240 VAC power can be adapted to the particular installation
and comply with all applicable electrical codes. Refer to the
connection diagram shown in Figure A.4.
1. Install the double-pole, double-throw switch between the
power company meter and the premises disconnect. Switch
rating must be the same or greater than the customer’s
premises disconnect and service over current protection.
2. Take necessary steps to assure load is limited to the capacity
of the Vantage
®
549X by installing a 50 amp, 240 VAC double
pole circuit breaker. Maximum rated load for each leg of the
240 VAC auxiliary is 50 amps. Loading above the rated output
will reduce output voltage below the allowable -10% of rated
voltage which may damage appliances or other motor-driven
equipment and may result in overheating of the engine and /
or alternate windings.
3. Install a 50 amp 120/240 VAC plug (NEMA Type 14-50P) to
the double-pole circuit breaker using No. 6, 4 conductor cable
of the desired length.
4. Plug this cable into the 50 Amp 120/240 Volt receptacle on
the Vantage
®
549X case front.
240 Volt
60 Hz.
3-Wire
Service
POWER
COMPANY
METER
240 VOLT
120 VOLT
120 VOLT
LOAD
N
NEUTRAL
BUS
GROUND
PREMISES
DISCONNECT AND
SERVICE
OVERCURRENT
PROTECTION
GND
N
NOTE: No. 6 COPPER CONDUCTOR CABLE SEE
NATIONAL ELECTRICAL CODE FOR ALTERNATE WIRE
SIZE RECOMMENDATIONS.
240 VOLT
GROUNDED CONDUCTOR
50AMP
240 VOLT
DOUBLE
POLE
CIRCUIT
BREAKER
DOUBLE POLE DOUBLE THROW
SWITCH RATING TO BE THE SAME
AS OR GREATER THAN PREMISES
SERVICE OVERCURRENT
PROTECTION.
50 AMP, 120/240
VOLT PLUG
NEMA TYPE 14-50
50 AMP, 120/240 VOLT
RECEPTACLE
FIGURE A.4 Connection of the Vantage
®
549X to Premises Wiring