MLG25 Ops-Parts 10.17.08 G 12346 DRAFT.pmd

VOLTAGE SELECTOR SWITCH

The voltage selector switch is located under the lug door, directly below the control power switch. The selector switch is a three position switch that mechanically changes the connections between the generator output leads and the connection lugs on the main control panel. Voltage ranges are selected by rotating the handle on the switch to the desired voltage. Note: Three phase (3Ø) voltage is not available at ANY of the electrical receptacles. Three phase voltage is only available at the connection lugs.

NOTICE

NEVER CHANGE THE VOLTAGE SELECTOR SWITCH WHILE THE ENGINE IS RUNNING!

This will cause severe arcing and damage to the switch and generator windings.

480/277V

3-PHASE

480

277

208/120V

3-PHASE

480

277

240/120V

1-PHASE

208

120

208

120

208

120

240

120

240

120

T3

L3

T1

L1

T4

T7

T6

T9

T10

T12

N

T11

T8

T5

L-N

T2

L2

L-L

T7

L1

T1

L1 - L2 = 480V L1 - N = 277V

L2 - L3 = 480V L2 - N = 277V

L3 - L1 = 480V L3 - N = 277V

N =

L1 - L2 = 208V L1 - N = 120V

L2 - L3 = 208V L2 - N = 120V

L3 - L1 = 208V L3 - N = 120V

N =

L3

T9

T3

T10

T12

T4

N T5

T6

T11

L-N

T8

T2

L2

L-L

L3

T3

T9

T6

T12 T2

T8

120V

T5

T11

N

T10

T4

120V

240V

T7

T1

L1

L1 - L3 = 240V L2 - N = -------

L1 - N = 120V L3 - N = 120V

The voltage selector switch is equipped with a locking mechanism. Once the proper voltage has been selected, push the red latch on the inside of the switch handle up and insert a padlock through the handle. By locking the handle in place you will prevent unauthorized personnel from changing the switch settings.

Note: When the voltage selector switch is in position for 480/277V 3Ø, voltage at the two GFCI duplex convenience outlets is 139 Volts and the voltage at the twist-lock outlets is 240/139 Volts (1Ø). When the voltage selector switch is in position for 208/120V 3Ø, voltage at the twist-lock outlets and at the GFCI outlets is 208/120 volts

(1Ø).

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