SECTION 3 INSTALLATION
66
3.4.2 SPLIT PHASE OUTPUT
The wiring requirements for high range ( 0-270, 0-300V
AC
) 220 VAC, 1
φ
, 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 "
φ
A
" terminal (the "
L1
" terminal on the Model
125-AMX) and the low side of the load to the "
φ
B
" 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.
Summary of Contents for AMX Series
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