Puls Dimension Q-Series, Manual, Page: 1 / 27

QTD20.241
Q-Series
24V, 20A, DC I
NPUT
DC/DC
CONVERTER
ƒ
DC 600V Input
ƒ
Optimized for Intermediate DC-bus of Drive Systems
ƒ
Two Input Fuses for DC 600V included
ƒ
95% Full Load and Excellent Partial Load Efficiencies
ƒ
Width only 65mm, Weight only 890g
ƒ
25% BonusPower ® , 600W for up to 4s
ƒ
Active Filtering of Input Transients
ƒ
Full Power Between -25°C and +60°C
ƒ
Extremely Low Input Inrush Current Surge
ƒ
Reverse Input Polarity Protection
ƒ
DC-OK Relay Contact
ƒ
Quick-connect Spring-clamp Terminals
ƒ
3 Year Warranty
1/27
G
ENERAL
D
ESCRIPTION
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 DC/DC converter 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.
The intermediate DC-bus is usually unfiltered and have
high EMI noise so 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.
S
HORT
-
FORM
D
ATA
Output voltage DC 24V nominal
Adjustment range 24 - 28V
Output current 20 – 17.5A continuous
25 – 21.4A short term (4s)
Output power 480W continuous
600W short term (4s)
Output ripple < 100mVpp 20Hz to 20MHz
Input voltage DC 600V -20%/+40%
Input current 0.85A at 600Vdc
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
Weight 890g / 1.96lb
L1
L2
L3
PE
f
Motor
PE
+
DC Load,
Controller
QTD
+
-
+
-
PE
f
Motor
O
RDER
N
UMBERS
DC/DC converter QTD20.241
Accessory ZM1.WALL Wall mount bracket
ZM14.SIDE Side mount bracket
UF20.241 Buffer unit
YR40.241 Redundancy module
M
ARKINGS
IND. CONT. EQ.
UL 508
EMC, LVD
Oct. 2016 / Rev. 2.0 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