Page 1
Unit type
1 Terminal Block
2 Function
3
Assembling and installation Method
A-129
4
Connecting the unit to a DBS series unit
4.1
4.2
Instruction Manual
2.1
3.1
2.2
3.2
2.3
2.4
2.5
2.6
2.7
Input voltage range
Cooling
Connection method
Inrush current limiting
Mounting screw
Sequence unit
Overcurrent protection
Isolation
Thermal protection
Alarms
Remote ON/OFF output
A-130
A-130
A-131
A-130
A-130
A-130
A-130
A-130
A-130
A-130
A-131
A-131
A-131
A-131
A-131
STA
Page 2
Instruction Manual
Unit type
A-130
1 Terminal Block
2.1 Input voltage range
2.2 Inrush current limiting
2.3 Overcurrent protection
n
n
n
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
- are provided only in STA5000T-R
2.4 Isolation
2.5 Thermal protection
2.6 Alarms
2.7 Remote ON/OFF output
n
n
n
n
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
Page 3
Instruction Manual
4.1 Connection method
4.2 Sequence unit
n
n
Pay attention to these points when connecting a DBS series unit
to the STA5000T.
STA5000T can optionally be equipped with a sequence unit for
controlling the DBS series units' remote control circuits ON/OFF
with a particular timing.
”
Employing this sequence unit enables starting and stopping of up
to 4 DBS systems at differential times.
The sequence unit operates by shorting the SYSTEM ON/OFF
terminals to change the status of the REMOTE SIGNAL 1 - 4
ON/OFF terminals from H to L.
Under the following situations, however, the signal from the
REMOTE SIGNAL 1 - 4 ON/OFF terminals will change from L to H.
1) 1 of the 3 phases is missing, due to equipment failure, etc.
2) Activation of the thermal detection.
Power units equipped with a sequence unit have the model name
STA5000T-R”.
REMOTE SIGNAL 1-4 signal might be H level if voltage drop
would happen when load is light.
For detailed information on how to use the sequence unit, please
consult our sales or engineering departments.
1 For some users, noise regulation requirements may make a
noise filter necessary.
Users are recommended to install a noise filter to reduce radi-
ation noise from the cabling, especially in cases where the ca-
bling is long.
2 Be sure to connect up the REMOTE ON/OFF terminals (or the
REMOTE SIGNAL ON/OFF terminals in a STA5000T-R) before
running the DBS.
Using the DBS without those terminals connected could dam-
age the STA5000T.
Unit type
A-131
4 Connecting the unit
to a DBS series unit
3.2 Mounting screw
nKeep isolation distance between screw and internal components
as below chart.
3.1 Cooling
3 Assembling and
Installation Method
Mounting screw
Chassis
Unit
8mm max
M4
STA5000T
AC(R)
AC IN
3
200V
AC(S)
AC(T)
2
REMOTE ON/OFF (+)
REMOTE ON/OFF (-)
1
DBS
DBS
+V
-V
+VIN
-VIN
RC1
+VOUT
-VOUT
-VIN
RC1
-VOUT
-S
-S
-VIN
+VOUT
+S
+S
RC3 RC2AUX -S
RC3 RC2AUX -S
Load
Load
STA
nThe power unit is designed for use with forced cooling by external
fans. When the power unit is used, the temperature of part A of
the unit should be below 75 degree by flowing cooling-air inside
of unit uniformly.
AIR
AIR
20
A
SS3
FAN
FAN
55
Radiator Plate
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