TDK-Lambada HWS?HWS, Руководство пользователя, Страница: 102 / 133

102
・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
5. External Fuse Rating
Refer to the following fuse rating when selecting the exter-
nal fuses for input line. Surge current flows when line turns
on. Use slow-blow fuse or time-lug fuse. Do not use fast-
blow fuse. Fuse rating is specified by in-rush current value at line turn-on. Do not select the fuse according to input
current (rms.) values under the actual load condition.
HWS1000：20A
6. Troubleshooting
Before concluding that the unit is at fault, make the follow-
ing checks.
（1） Check if the rated input voltage is apply.
（2） Check if the wiring of input and output is correct.
（3） Check if the I/O terminal connection is properly tight-
en by a regulated tightening torque.
（4） Check if the wire material is not too thin.
（5） Check if the output voltage control (V.ADJ) is properly
adjusted. OVP might be trigged and output is cut off.
（6） Check if the wiring of +S and -S terminal is correct.
If in open condition, the stability and the accuracy of the
output deteriorate.
（7） If use function of the remote ON/OFF control, check
if the remote ON/OFF control connector is not
opened.
If in open condition, output is cut off.
（8） Check if the built-in fan is not stopped. Is fan stopped
by something irregulars or dust, etc.
If fan stops, the PF signal is turn on.
Moreover, the output is intercepted with the protection
circuit if fan stops.
Fans are the limited life parts.
（9） This power supply has ventilating holes on the front
and back panels. Check if there is any irregulars or
dust, etc.
（10） Is the main body of the power supply abnormally hot?
Please turn on the input again after allowing the unit
to cool down sufficiently. The output shut down by
over temperature protection function.
（11） Check if the output current and output power is not
applied over specification.
（12） Check if the input voltage wave is sinusoidal. If this
power supply unit is connected to a UPS, input volt-
age wave might not be sinusoidal. An audible noise
is emmited from the power supply unit.
（13） Audible noise can be heard during Dynamic-Load op-
eration.
HWS
1000
4. Wiring Method
（1） The output load line and input line shall be separated
and twisted to improve noise sensitivity.
（2） The sensing lines shall be twisted or shield wire and
separated from the output lines.
（3） Use all lines as thick and short as possible to make
lower impedance. Wires are to be twisted or use
shield wire to improve noise sensitivity.
（4） Attaching a capacitor to the load terminals can elimi-
nate noise.
（5） FG terminal of this power supply is functional earth-
ing. For safety purposes, connect protective earthing
terminal to the mounting set ground terminal.
（6） Recommended torque for the terminal piece:
Input terminal (M4 screw): 1.27 N･m
Output terminal (M8 Bolt & Nut): 10.8N・m
（7） Recommended wiring
〜
Load
Circuit
Protector
Noise Filter
HWS1000
AC （L）
AC （Ｎ）
AC （Ｎ） AC （Ｎ）
AC （L） AC （L）
AC （L）
AC （Ｎ）
FG
＋
−
Chassis of the equipment
Recommended circuit protector: AC250V20A
Recommended noise filter:
RSEN-2020 (TDK-Lambda)
(8) M4 screw for output terminal might damage the ter-
minal s inner thread. This is mainly cause by the M4
screw s unthread section. Therefore, please select a
washer, spring washer, etc. to avoid unthread screw
section from penetrating into output terminal inner
section.
Output terminal
Unthread section
P79-132.indd 102 09.10.26 10:29:28 AM