LDT481 Series is a high power switching mode power supplies with
three phase input voltage 400 – 500 VAC, delivering 480 W of output
power, covering output voltages from 24 to 72 V (model dependent).
Their compact size, high efficiency and excellent reliability together
with easy installation make them fit demanding applications where
compactness and high power are needed.
LDT481 Series are suitable for SELV and PELV circuitry (up to 48 VDC
models) and are designed to be mounted on DIN rail and installed
inside a protective enclosure.
3 phase AC input 400 – 500 VAC
Overload 150%
High Efficiency and compact size
Up to 50°C operating temperature with no derating
User settable current limitation (Hiccup or Constant mode)
Easy parallelable for power increase
Natural convection cooling
72 V output model as standard
Automation
Process Control
Communication
Instrumentation Equipment
2
LDT481 Series
LDT481-12
LDT481-24
LDT481-48
LDT481-72
400 - 500 VAC / 520 - 725 VDC
400 - 500 VAC / 520 - 725 VDC
400 - 500 VAC / 520 - 725 VDC
400 - 500 VAC / 520 - 725 VDC
3
3
3
3
12 VDC
24 VDC
48 VDC
72 VDC
40 A
20 A
10 A
6.7 A
Technical parameters are typical, measured in laboratory environment at 25°C and 400 VAC / 50 Hz, at nominal values, after minimum
5 minutes of operation.
Input AC Voltage Range
1
Input DC Voltage Range
Input Frequency
Input AC Current
Rated, three phase (UL certified)
Operating
400 – 500 VAC
340 – 550 VAC
520 – 725 VDC
47 - 63 Hz
Vin = 400 VAC
Vin = 500 VAC
Vin = 520 VAC
Vin = 725 VAC
1.3 A
1.1 A
1.2 A
0.9 A
≤
50 A
≤
0.15 mA
Input DC Current
Inrush Peak Current
Touch (Leakage) Current
Internal Protection Fuse
Recommended External Protection
1
None, external fuse must be provided
It is strongly recommended to provide external surge
arresters (SPD) according to local regulations
Fuse 3x 10 AT or 3x MCB 10 A C curve
In case of 2 phase operation, reduce the output load to 50% of the nominal value.
Output Power
Rated Voltage (Adjustable Voltage Range)
LDT481-12
LDT481-24
LDT481-48
LDT481-72
LDT481-12
LDT481-24
LDT481-48
LDT481-72
LDT481-12
LDT481-24
LDT481-48
LDT481-72
LDT481-12
LDT481-24
LDT481-48
LDT481-72
LDT481-12
LDT481-24
LDT481-48 / LDT481-72
LDT481-12
LDT481-24 / LDT481-48 / LDT481-72
Continuous Current
Overload Limit (Constant Current Mode)
Overload Limit (Hiccup Mode) (max. 5s)
Load Regulation
Ripple & Noise
2
Hold up Time
480 W
12 VDC (12 – 15 VDC)
24 VDC (23 – 28 VDC)
48 VDC (45 – 55 VDC)
72 VDC (72 – 85 VDC)
40 A
20 A
10 A
6.7 A
44 A
22 A
11 A
7.5 A
60 A
30 A
15 A
10 A
≤
2.5%
≤
1.0%
≤
0.5%
≤
150 mVpp
≤
100 mVpp
≥
20 ms
tech.support@psbel.com
LDT481 Series
Protections
Overload, short circuit: Constant current or
Hiccup mode (user settable)
Thermal protection
Output overvoltage
LDT481-12
LDT481-24
LDT481-48
LDT481-72
DC OK - green LED
OVERLOAD - red LED
DC OK - dry contact (NO, 24 VDC / 1 A)
Possible for power or redundancy
(with external ORing module)
LDT481-12
LDT481-24 / LDT481-48
LDT481-72
LDT481-12
LDT481-24 / LDT481-48
LDT481-72
3
Output Over Voltage Protection
≥
18 VDC
≥
33 VDC
≥
68 VDC
≥
100 VDC
Status Signals
Parallel Connection
3
Efficiency
Dissipated Power
2
3
> 87.5%
> 93.5%
> 94%
< 69 W
< 34 W
< 31 W
Ripple and Noise are measured with 20 MHz bandwidth, probe terminated with a 0.1μF MKP parallel capacitor.
Pay attention, set the current limitation mode jumper on C.C. mode when connecting more units in parallel.
NOTE:
Power rating, losses, efficiency, ripple, thermal behaviour and start-up may change outside of the nominal rated input range.
Contact factory for details.
Operating Temperature
Storage Temperature
Derating
Humidity
Life Time Expectancy
Overvoltage Category
Pollution Degree
Protection Class
Isolation Voltage
UL certified up to 50°C
(Start-up type tested: - 40°C)
4
- 40 to + 70°C
- 40 to + 80°C
- 4.5 W/°C over 50°C
Non-condensing
At 25°C ambient 75% load
5 - 95% RH
63200 h (7.2 years)
III (EN50178)
2 (IEC60664-1)
Class I
4.2 kVDC
2.2 kVDC
0.75 kVDC
Standards & Approvals
EMC Emission
EMC Standards
EMC Immunity
Protection Degree
Vibration sinusoidal
Shock
4
Input to Output
Input to Ground
Output to Ground
UL508 (certified)
EN60950 (reference)
EN50178 (reference)
EN55011 (CISPR11)
EN55022 (CISPR22)
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-11
EN60529
IEC 60068-2-6
IEC 60068-2-27
Class A
Class A
Level 3
Level 3
Level 3
Level 4
Level 2
IP20
5-17.8 Hz: ±1.6 mm; 17.8-500 Hz: 2g 2Hours /
axis (X,Y,Z)
30 g 6 ms, 20 g 11 ms;
3 bumps / direction, 18 bumps total)
Possible at nominal voltage with load derating.
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00845_AB
© 2016 Bel Power Solutions & Protection
4
LDT481 Series
INPUT CONNECTION
3 phase:
L1 = Phase 1
L2 = Phase 2
L3 = Phase 3
= Earth ground
DC:
L1 = + Positive DC
L2 = - Negative DC
L3 = do not connect
= Earth ground
OUTPUT CONNECTION
1
+ = Positive DC
- = Negative DC
Dry contact = NC
Signaling:
DC OK: dry contact
NO
COM
2
3
4
5
6
7
AC/DC input
DC output (load)
Diagnostic Output
(dry contact, NC output OK)
Green LED: Output OK
Red LED: Overload
Output voltage adjustment
Selectable limitation mode
Weight
Dimensions
Mounting Rail
Connection Terminals
Case Material
Screw type header (16 – 10 AWG)
Screw type header (10 – 6 AWG) ) for output on 12 V model
Aluminum
1.3 kg
80 x 127 x 137.5 mm
IEC 60715/H15/TH35-7.5(-15)
1.5 – 6 mm
2
6 - 16 mm
2
Figure 1. Mechanical Drawing
NUCLEAR AND MEDICAL APPLICATIONS
- Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS
- The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
tech.support@psbel.com
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