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Table 5-1. Power Requirements For Load
Amperage At Input Voltage
KW
1
1.5
2
2.5
AMPERES
8
12
17
21
AT 120V
AMPERES
4
6
8
10
AT 240V
Power requirements up to 10kw at 120 or 240 vac input
for various ampere load values are shown in Table 5-1
and on the unit nameplate. Ampere values selected at
the two AMPERAGE load switches differ between 120
and 240 VAC input as follows:
120 Volt Operation: When this unit is used as a 120 volt
load, AMPERAGE load switch settings are added
together to obtain the approximate load value. For
example, if one switch is set at 20 amperes and the
other switch at 20 amperes, the result would be a total
load of approximately 40 amperes.
240 Volt Operation: When this unit is used as a 240 volt
load, both Amperage load switches must be set at the
same value to obtain that approximate load value. For
example, if one switch is set at 20 amperes and the
other switch at 20 amperes, the result would be a total
load of approximately 20 amperes.
IMPORTANT: Do not change either switch setting more
than one position higher or lower from the setting on the
other switch (see CAUTION at beginning of Section 5-3
and on the unit nameplate).
5-4.
VOLTMETER (Figure 5-1)
CAUTION:
DC
SOURCES will damage unit.
Do not connect unit to any dc source.
WARNING: ELECTRIC SHOCK can kill.
Do not touch live electrical parts.
Shut down auxiliary power source before
connecting load bank.
HOT SURFACES can cause burns and melt
or ignite materials.
Do not touch load bank panels while oper-
ating.
Do not place any objects on load bank.
ARCING AND EXHAUST SPARKS can cause
fire.
Watch for fire.
Have a fire extinguisher nearby and know
how to use it.
Disconnect welding cables from power
source, if applicable, before testing auxiliary
power output.
OM-877 Page 10
3
4
5
6
7
7.5
8
9
25
33
42
50
58
62
67
75
12 17 21 25
29 31 33 37
(DIRECT
CURRENT)
SECTION 6 – SEQUENCE OF OPERATION
The voltmeter displays the voltage of the ac power
source. The scale range is 0–300 in increments of 2.5
volts.
10
5-5.
HERTZ METER (Figure 5-1)
83
CAUTION:
SOURCES will damage unit.
42
Do not connect unit to any dc source.
The hertz meter displays the frequency of the power
being supplied by the ac power source. The scale range
is 45–65 in increments of 0.5 Hz.
5-6.
DUAL-SCALE AC AMMETER (Figure 5-1)
Figure 5-3. Dual-Scale AC Ammeter
CAUTION:
SOURCES will damage unit.
Do not connect unit to any dc source.
The ammeter is a dual-scale meter that displays ac
amperes for the 120 volts input on the top scale and ac
amperes for the 240 volts input on the bottom scale.
ENGINE EXHAUST GASES can kill.
Use in open, well ventilated areas or vent
exhaust out of doors, if applicable.
MAGNETIC
CURRENTS can affect pacemaker opera-
tion.
Wearers should consult with their doctor
before going near equipment producing auxil-
iary power during load bank operation.
See Section 1 – Safety Rules For Operation Of
Arc Welding Power Source for basic informa-
tion.
6-1.
LOADING PROCEDURE
1.
Make required connections to unit according to
Section 4-2.
2.
Place AMPERAGE load switches in the OFF
position (see Section 5-3).
DC
(DIRECT
CURRENT)
SN-107 796
DC
(DIRECT
CURRENT)
FIELDS
FROM
HIGH
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