Assembling And Installation Method - Cosel PAA50F Instruction Manual

PAA
l
PAA300F PAA600F
n
Parallel redundancy operation is available by connecting the units
as shown below.
n
As variance of output current drew from each power supply is
maximum 10%, the total output current must not exceed the
value determined by the following equation.
(Output current at parallel operation)
= (the rated current per unit)
When the number of units in parallel operation increases, input
current increases at the same time.
Adequate wiring design for input circuitry is required, such as cir-
cuit pattern, wiring and current capacity for equipment.
In parallel operation, the maximum operative number of units is 5.
n
Output voltage in parallel operation is adjustable by using the po-
tentiometer of the "master" unit.
Select one power supply to be the master, and turn the potenti-
ometer of the other, slave power supplies, clockwise to the end. "
Then use the potentiometer of the mater to adjust output voltage.
n
When remote sensing is used in parallel operation, the sensing
wire must be connected ONLY to master.
l
PAA300F
-S
CB
VB
-S +S
- +
l
PAA600F
CB
VB
-S
-M
+S
+M
- +
PAA-20
AC-DC Power Supplies Enclosed type
(number of unit) 0.9
"
-S
CB
VB
- +
( - ) ( + )
Load
CB
CB
VB VB
-S
- +
( - )
( + )
Load
n In parallel operation, output voltage increases like stairs due to a
delay of the rise time of output voltage at turn on.
4 Assembling and
Installation Method
4.1 Installation method
l
PAA50F PAA75F PAA100F PAA150F
n
When two or more power supplies are used side by side, position
them with proper intervals to allow enough air ventilation. Ambient
temperature around each power supply should not exceed the
temperature range shown in derating curve.
l
PAA300F PAA600F
n
Fan for forced cooling is built-in. Do not block the ventilation at
suction side (terminal block side) and its opposite side.
n
When unit operates at dusty place, attach air-filter to dust into the
unit. In this case, avoid poorly ventilated environments .
-S
CB
n
When internal fan stops, thermal protection circuit works which
VB
stops the output. To keep reliability of the unit, periodic mainte-
nance of the fan is required.
-
+
n
The expected life time of fan is different by operating condition.
-S
- +
4.2 Derating
n
The operative ambient temperature is different by with/without
case cover or mounting position. Please refer drawings as below.
n
When unit mounted except below drawings, it is required to con-
sider ventilated environment by forced air cooling or tempera-
ture/load derating. For details, please consult our sales or engi-
neering departments.
June 29, 2011
Instruction Manual