Datasheet
QTD20.241
Q-Series
24V, 20A, DC INPUT
Mar 2012 / Rev. 1.2 DS-QTD20.241-EN
All parameters are specified at 24V, 20A, 600Vdc input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
POWER SUPPLY
• 600Vdc Input Voltage
• Optimized for Intermediate DC-busses of Drive Systems
• Two Input Fuses for 600Vdc Included
• Efficiency up to 95%
• Width only 65mm
• 125% Peak Load Capability
• Active Input Transient Filter
• Full Power Between -25°C and +60°C
• Minimal Inrush Current
• Reverse Input Polarity Protection
• DC-OK Relay Contact
• Quick-connect Spring-clamp Terminals
• 3 Year Warranty
1. GENERAL DESCRIPTION
2. SHORT-FORM DATA
Output voltage DC 24V
Adjustment range 24-28V
Output current 20A continuous, 24V
25A for typ. 4s, 24V
Output power 480W continuous, 24V
600W for typ. 4s, 24V
Output ripple < 100mVpp 20Hz to 20MHz
Input voltage DC 600V
480-840Vdc continuous
360-480Vdc
840-900Vdc
< 1 minute
or with reduced
output current
Input current 0.85A 600Vdc, 24V, 20A
Inrush current typ. 1.5A peak
Efficiency 95.0% at 600Vdc
Losses 25.5W at 600Vdc
Temperature range
-25°C to +70°C operational
Derating 12W/°C +60 to +70°C
Hold-up time typ. 22ms at 600Vdc
Dimensions 65x124x127mm wxhxd
Modern machines typically use maintenance-free AC-
motors which are controlled by frequency converters
or servo amplifiers. Such devices have an
intermediate DC-bus where all individual drives are
connected.
The QTD20 power supply can be connected directly
to the intermediate DC-bus. In case of a mains
failure, the QTD20 utilizes the power from the DC-
bus capacitors which are charged from the kinetic
energy of the motor until the motor has come to a
complete stop.
Intermediate DC-buses are not usually filtered and
have high EMI noise superimposed. The QTD20 has a
very robust input stage and an appropriate input
filter included.
Additionally, the
QTD20 is UL 508
approved and is
equipped with
input fuses which
are rated and
tested for 600Vdc
applications.
L1
L2
L3
PE
f
Motor
PE
+
DC Load,
Controller
QTD
+
-
+
-
PE
f
Motor
3. ORDER NUMBERS
4. MARKINGS
Power Supply
QTD20.241
600VÆ24V Converter
Accessory ZM1.WALL Wall mount bracket
ZM14.SIDE Side mount bracket
YR2.DIODE Decoupling module
UF20.241 Buffer unit
IND. CONT. EQ.
18WM
LISTED
UL 508
EMC, LVD
1/22