Lincoln Electric VANTAGE 520 SD Operator's Manual page 16

VANTAGE ® 520 SD
STANDBY POWER CONNECTIONS
The VANTAGE ® 520 SD is suitable for temporary, standby or
emergency power using the engine manufacturer's recommended
maintenance schedule.
The VANTAGE ® 520 SD can be permanently installed as a standby
power unit for 240 volt-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 con-
nection 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 dis-
connect and service over current protection.
FIGURE A.4 Connection of the VANTAGE
POWER
240 Volt
60 Hz.
COMPANY
3-Wire
Service
METER
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
240 VOLT
120 VOLT
120 VOLT
240 VOLT
DOUBLE
CIRCUIT
240 VOLT
BREAKER
GND
A-8
2. Take necessary steps to assure load is limited to the capacity of
the VANTAGE ® 520 SD 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 VANTAGE
SD 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 ® 520 SD case front.
® 520 SD to Premises Wiring
GROUNDED CONDUCTOR
50AMP
POLE
N
NOTE: No. 6 COPPER CONDUCTOR CABLE SEE
NATIONAL ELECTRICAL CODE FOR ALTERNATE WIRE
INSTALLATION
NEUTRAL
BUS
N
PREMISES
DISCONNECT AND
SERVICE
GROUND
OVERCURRENT
PROTECTION
SIZE RECOMMENDATIONS.
® 520
LOAD