Instruction Manual
Unit type
A-130
1 Terminal Block
2.1 Input voltage range
2.2 Inrush current limiting
2.3 Overcurrent protection
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The range is from AC175V to AC264V by 3 phase.
AC input voltage must have a range from AC175V to AC264V for
normal operation. If the wrong input is applied, the unit will not op-
erate properly and/or may be damaged.
lnrush current limiting is built-in.
If a switch on the input side is installed, it has to be the one han-
dling the input inrush current.
The thyristor technique is used for protection from inrush current.
When power is turned ON/OFF repeatedly within a short period of
time, it is necessary to have enough time between power ON and
OFF to operate resistance circuit for inrush current.
The input fuse provides protection against overcurrent.
This fuse blows when the output is short-circuited.
Replace only with the same type of fuse.
2 Function
AC(R)
AC S
AC T
Frame ground
LED
Output connector
ALM
ALM
SYSTEM ON/OFF
SYSTEM ON/OFF
( )
( )
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
(+)
(-)
REMOTE SIGNAL1 ON/OFF
REMOTE SIGNAL1 ON/OFF
REMOTE SIGNAL2 ON/OFF
REMOTE SIGNAL2 ON/OFF
REMOTE SIGNAL3 ON/OFF
REMOTE SIGNAL3 ON/OFF
REMOTE SIGNAL4 ON/OFF
REMOTE SIGNAL4 ON/OFF
SIGNAL(AL OUT, REMOTE ON/OFF) connector
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are provided only in STA5000T-R
2.4 Isolation
2.5 Thermal protection
2.6 Alarms
2.7 Remote ON/OFF output
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For a receiving inspection, such as Hi-Pot test, gradually increase
(decrease) the voltage for the start (shut down).
Avoid using Hi-Pot tester with the timer because it may generate
voltage a few times higher than the applied voltage, at ON/OFF of
a timer.
A rise in the temperature of the power unit's interior (due to stop-
page of the external fan, etc.) will trigger activation of the over-
heating detection circuits.
If these circuits are activated, shut off the input voltage and wait
until the power unit's interior has thoroughly cooled before resum-
ing the input to the power unit.
The power unit (STA5000T) has a built-in alarm signal outputting cir-
cuit for monitoring its operation. When this circuit works, the signal
from the AL OUT (ALM for STA5000T-R) will change from L to H.
The alarm signal is provided when the following situations arise:
1) 1 of the 3 phases is missing, due to equipment failure, etc.
2) Activation of the thermal detection.
Note that the output voltage will not stop even when the alarm cir-
cuit works. Shut off the input, otherwise the power unit may be
damaged.
AL OUT signal (ALM signal for STA5000T-R) might be H level if
voltage drop would happen when load is light.
The power unit has a built-in REMOTE ON/OFF circuit for con-
trolling the DC-DC modules being used with it.
If AC voltage is applied to the power unit, the signal from the
REMOTE ON/OFF terminal will change from H to L after a few hun-
dred milliseconds. Under the following situations, however, the sig-
nal from the REMOTE ON/OFF terminal will change from L to H:
1) 1 of the 3 phases is missing, due to equipment failure, etc.
REMOTE ON/OFF signal might be H level if voltage drop would
happen when load is light.
STA
