Terex T25 - Page 15

Terex T25I and T45I Super Quiet Generator 15
Operating Instructions and Parts Manual
June 2006
REV A
OPERATING INSTRUCTIONS (Cont.)
• The voltage selector switch can control the
single-phase receptacles provided on the unit.
Their indicated voltages should be checked
after selecting the setting of the switch. The Y
voltage configurations of 480 and 240 will have
a voltage of 139 on the GFI receptacles.
VOLTAGE SELECTOR SWITCH
OPERATION
The voltage selector switch will have three posi-
tions, and each position gives a different output to
the three-phase distribution lugs (designated as
“L1”, “L2”, “L3”, and “N”) located on the distri-
bution panel.
In the three-phase “480/277” position, the follow-
ing will be the normal output voltages:
• Line - to - Line (“L1” to “L2”, “L2” to “L3”,
“L1” to “L3”) 480 VAC/3P.
• Line - to - Neutral (“L1”, “L2” or “L3” to “N”)
277 VAC/1P.
NOTICE: This three-phase wiring configuration
is referred to as “Hi Wye”.
In the three-phase “208/120” position, the follow-
ing will be the normal output voltages:
• Line - to - Line (“L1” to “L2” and “L2” to
“L3”; “L1” to “L3”) 240 VAC/3P.
• Line - to - Neutral (“L1”, “L2”, or “L3” to
“N”) 139 VAC/1P.
NOTICE: The above voltages can be “dialed
down”, or adjusted lower, by using the voltage
adjustment potientiometer located on the gen-
erator main control panel.
NOTICE: This three-phase wiring configuration
is referred to as “Lo Wye”.
The three position selector switch has HI WYE
480 V 3ph., LOW WYE 240 V 3ph. and 240V
single phase that is Zig Zag. The following is the
output voltages on the zigzag position.
• Line 1-to-L3 240 VAC/1P.
• Line-to-Neutral 120 VAC/1P L2 is not used in
this position.
THIS EQUIPMENT USES HIGH VOLT-
AGE CIRCUITS CAPABLE OF CAUSING
SERIOUS INJURY OR DEATH! EXCERCISE EX-
TREME CAUTION AROUND ANY ELECTRICAL
COMPONENT WHEN OPERATING THIS UNIT.
Once the required voltages are known, then the
combination of the proper switch position and
voltage adjustment potentiometer allows for fine
tuning the voltage to the exact needs of the
application.
ONCE THE PROPER VOLTAGE SELECTOR
SWITCH POSITION IS SELECTED, TEREX
HIGHLY RECOMMENDS THAT THE SWITCH
BE PADLOCKED IN THAT POSITION. THIS
PREVENTS THE SWITCH FROM BEING
MOVED WHILE THE UNIT IS OPERATING OR
BY UNAUTHORIZED PERSONNEL. DAMAGE
TO THE UNIT AND ANY CONNECTED EQUIP-
MENT WILL BE AVOIDED.