Datasheet

787-842
Switched-Mode Power Supply, 3-Phase
EPSITRON
®
PRO Power
L1
L2
L3
DC+
DC+
DC -
DC -
DC O.K.
Stand-by
• Primary switch mode power supply unit with PowerBoost and TopBoost
• Stand-by input for switching off the output and minimizing power
consumption
• DC OK contact for output monitoring
•
Su
itable for both parallel and series operation
• Natural convection cooling when horizontally mounted
• Enclosed for use in switchgear cabinets
• Electrically isolated output voltage (SELV) acc. to EN 60950-1/UL 60950-1
Description
Item No.
Pack.
Unit
Switched-mode power supply,
24 V DC / 20 A
787-842 1
Technical Data
Input:
Nominal input voltage V
i nom
3x (2x) 400 … 500 VAC
Input voltage range 340 … 550 VAC; 480 … 780 VDC
Frequency 50 Hz … 60 Hz
Input current I
i
3 x 1.0 A at 340 VAC and 20 ADC
Discharge current 1mA typ.
Inrush current < 30 A
Mains failure hold-up time 13 ms typ. at 3 x 400 VAC
Output:
Nominal output voltage V
o nom
24 VDC (SELV)
Output voltage range 22.8 … 28.8 VDC adjustable
Output current I
o
20 A at 24 VDC
PowerBoost 40 ADC (for 4 s); 30 ADC (for 16 s)
TopBoost 80 ADC (for 50 ms)
Factory preset 24 VDC
Adjustment accuracy 1%
Residual ripple < 70 mV (peak-to-peak)
Current limitation 1.1 x Io typ.
Overload behavior Constant current
Operational indication LED green (DC OK), LED red (error)
Efficiency / power losses:
Efficiency 92.9 % typ.
Power loss P
V
8.3 W (stand-by) / 34.1 W (rated load)
Fuse protection:
Internal fuse 3 x T 2.5 A / 250 V
External fuse 3 x circuit breakers 6 A, 10 A, 16 A,
B or C characteristic;
or motor circuit breakers,
setpoint: 2.5 A, setting range: 2.5 … 4.0 A;
an external DC fuse is required for the DC
input voltage
Technical Data
Environmental requirements:
Ambient operating temperature -25 °C … +70 °C
Storage temperature -25 °C … +85 °C
Rel. humidity 5 % … 96 % (no condensation permissible)
Derating -3 % / K (> 50 °C)
Degree of pollution 2 (acc. to EN 50178)
Climatic category 3K3 (acc. to EN 60721)
Safety and protection:
Test voltage pri.-sec./ pri.-gr. / sec.-gr. 4.2 kV DC / 2.2 kV DC / 0.7 kV DC
Protection class I
Degree of protection IP20 acc. to EN 60529
Overvoltage category II
Overvoltage protection Via varistor at primary circuit
Short circuit protection Yes
No-load proof Yes
Feedback voltage Max. 35 VDC
Parallel operation Yes
Series connection Yes
MTBF > 500000 h (acc. to IEC 61709)
Connection and type of mounting:
Wire connection Input: WAGO 231 Series
Output: WAGO 831 Series
Cross sections Input:
0.08 mm² … 2.5 mm² / 28 … 12 AWG
Output:
0.5 mm² … 10 mm² / 20 … 8 AWG
Strip lengths Input: 8 … 9 mm / 0.31 … 0.35 in.
Output: 13 … 15 mm / 0.51 … 0.59 in.
Type of mounting DIN-rail mounting (EN 60715) in
2 positions
Dimensions and weight:
Dimensions (mm) W x H x L 77 x 171 x 179
Length from upper-edge of DIN 35 rail
Weight 1300 g
Standards and approvals:
Standards/specifications EN 60950, EN 61204-3,
EN 61558-2-16, UL
60950, UL 508
WAGO Kontakttechnik GmbH & Co. KG
Subject to design changes
06.04.2017
Postfach 2880 - D-32385 Minden
Hansastr. 27 - D-32423 Minden
Tel.: [phone] E-Mail: [e-mail]
Fax: [phone] www.wago.com