Pacific Power Source 345-AMX - Split Phase Output

SECTION 3 INSTALLATION
66
3.4.2 SPLIT PHASE OUTPUT
The wiring requirements for high range ( 0-270, 0-300V
AC
) 220 VAC, 1φ, or split phase
direct-coupled loads are shown in Figures 3.4.2.1 and 3.4.2.2. Split Phase or 2 Phase
operation is defined to be two voltage vectors (V
a
and V
b
) which are equal in magnitude and
separated by 180.
The output power is taken from the terminal block located on the rear panel of the chassis
labeled "OUTPUT POWER." The Output Form is set for FORM 2 when this type of load is
attached.
This power form has a direct-coupled voltage range of 0-270 VAC
l-l
(0-300 VAC
l-l
on
112/312/125-AMX) and is well-suited for driving 220 VAC single phase loads. In this case,
the high side of the load is connected to the "φA" terminal (the "L1" terminal on the Model
125-AMX) and the low side of the load to the "φB" terminal (the "L2" terminal on the Model
125-AMX). The "N" terminal is not used with this type of load.
Some loads require three connections (V
a
-N-V
b
or L
1
-N-L
2
). This type of load is commonly
referred to as the "Split Phase" type ( not available with the Model 125-AMX). In this case,
the "N" terminal of the output terminal block is used in addition to the wiring described above.
Refer to Figures 3.4.2.1 and 3.4.2.2 for connection details.
The "CHS" terminal must always be connected to the chassis of the load. Since the output
is isolated, any output terminal (direct-coupled output only) may be connected to chassis.
This allows the user to re-establish a local ground for the output. The output (preferably
Neutral) must be referenced to chassis somewhere. Unless demanded otherwise by a par-
ticular application, Pacific Power Source recommends that a jumper be installed across the
"N" ("L2" terminal for Model 125-AMX) and "CHS" terminals of the Output Terminal block.
The "N" terminal of the Output Power Terminal Block must always be connected to the
"CHS" terminal when using transformer-coupled outputs. Refer to Paragraph 3.4.4 for
special considerations when using transformer-coupled output forms.
Refer to Paragraph 3.7 for connection of the External Sense Input, when used.
NOTE: It is the user's responsibility to meet all local and national electrical
codes when installing this equipment.
WARNING
LETHAL VOLTAGES ARE PRESENT AT THE OUTPUT TERMINALS OF THIS MACHINE !
REFER OUTPUT CONNECTION TO A QUALIFIED ELECTRICIAN.