TDK-Lambda DRB240 Installationsanleitung Seite 15

PA635-04-01E
3. Terminal Connecting Method
Pay attention to the input wiring. If it is connected to wrong
terminal, the power supply will be damaged.
•
Input must be off when making connections.
•
Connect (Protective Earth) terminal of input
connector to ground terminal of the equipment.
•
The output load line and input line shall be separated
and twisted to reduce noise sensitivity.
When connecting or removing input and output wire, do
not apply stress to PCB.
4. Explanation of Functions and Precautions
4-1. Input Voltage Range
Input voltage range is single phase 85 ~ 264VAC (47~63Hz)
and can withstand 300VAC surge for 5 sec during operation.
Input voltage which is out of specification may cause unit to
damage. For cases where conformance to various safety specs
(UL, CSA, EN) are required, input voltage range will be 100
~ 240VAC (50/60Hz).
4-2. Output Voltage Range
Output voltage is set to the rated value at shipment. Please see
table above for voltages available. V.ADJ trimmer on the
front panel side can be used to adjust the output voltage (refer
to specifications for adjustable range). To turn the trimmer
clockwise, the output voltage will be increased. Take note
when the output voltage is increased excessively, over voltage
protection (OVP) function may trigger and the output voltage
will shut down. Decrease the
voltage will cause power supply entered into burst mode
operation and caused the relay to switch on and off
continuously. Furthermore, when increasing the output
voltage, reduce the output current so as not to exceed the
maximum output power.
4-3. Over Voltage Protection ( OVP )
The OVP function will shut down the output. To reset the
OVP, disconnect the input voltage from the power supply for
a minute and then re-apply. Possible to hiccup if the unit prior
to OVP point is already overloaded. Clicking sound of the
relay may exhibit during hiccup. The OVP point is fixed and
cannot be adjusted externally.
4-4. Over Current Protection ( OCP )
Hiccup mode with automatic recovery. If the output current
is >101% of peak load, the unit will hiccup and possible to
hear the clicking sound of the relay. Avoid continuous
operation in overload or short condition as it may result in
damage to the power supply.
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Vout lower than its rated
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4-5. Peak output current
The DRB240 can deliver 120% peak current for 10 seconds
aiding the startup of capacitive loads and
operation of downstream circuit breakers. The operating
conditions for peak output current are as followed:
(a) Duty cycle of peak current, D ≤35%
(b) ≤ rated output power and RMS current
(c) Reduce peak current according to output derating
curve for higher ambient temperature.
(d) Peak output current and its duration are defined as
followed:
Ip
Irms
Imin
0A
Ʈ
Ip : Peak output current (A)
Irms : Rms output current (Arms)
Imin : Minimum output current (A)
: Peak current pulse width (sec)
Ʈ
T : Period (sec)
Input voltage range (Vin)
Continuous peak output time ( Ʈ ) : Within 10 sec
Peak output current (Ip)
Rms output current (Irms)
Duty, D = Ʈ / T x 100%
2 2
Irms = [ Ip x D + Imin x (1-D) ]
4-6. Output Ripple & Noise
The standard specification for maximum ripple value is
measured according to measurement circuit as below. When
load lines are longer, ripple becomes larger. In this case,
electrolytic capacitor, film capacitor, etc. might be necessary
to use across the load terminal. The output ripple cannot be
measured accurately if the probe ground lead of oscilloscope
is too long.
+
+
P.S.
C1 C2
-
300mm
C1 : 47uF Electrolytic Capacitor
C2 : 0.1uF Film Capacitor
TDK-Lambda
DRB240 Series
INSTRUCTION MANUAL
T
: 85V - 264V
: Within rated peak output current
: Within rated rms output current
≤ 35%
1/2
≤ Rated rms output current
Load
1.5m 50 Ω Cable
Oscilloscope
Bandwidth : 20MHz