Data Sheet

QT20.241, QT20.241-C1
Q-Series
24V, 20A, THREE PHASE INPUT
Apr. 2017 / Rev. 2.1 DS-QT20.241-EN
INDEX
Page Page
1.
Intended Use .......................................................3
2. Installation Requirements...................................3
3. AC-Input...............................................................4
4. Input Inrush Current ...........................................5
5. DC-Input...............................................................5
6. Output .................................................................6
7. Hold-up Time.......................................................8
8. DC-OK Relay Contact ..........................................8
9. Efficiency and Power Losses................................9
10. Lifetime Expectancy and MTBF.........................10
11. Functional Diagram...........................................10
12. Terminals and Wiring........................................11
13. Front Side and User Elements...........................12
14. EMC....................................................................13
15. Environment ......................................................14
16. Protection Features ...........................................15
17. Safety Features ..................................................15
18. Dielectric Strength ............................................16
19. Approvals...........................................................16
20. Physical Dimensions and Weight......................17
21. Accessories ........................................................ 18
21.1. ZM1.WALL – Wall/Panel mounting..........18
21.2. ZM14.SIDE - Side Mounting Bracket........19
21.3. UF20.241 - Buffer module ........................20
21.4. YR40.241 - Redundancy Module..............20
22. Application Notes............................................. 21
22.1. Repetitive Pulse Loading..........................21
22.2. Peak Current Capability ...........................22
22.3. External Input Protection.........................22
22.4. Using only 2 Legs of a 3-Phase System ....23
22.5. Charging of Batteries ...............................23
22.6. Output Circuit Breakers............................24
22.7. Series Operation .......................................24
22.8. Parallel Use to Increase Output Power....25
22.9. Parallel Use for Redundancy ....................25
22.10. Inductive and Capacitive Loads................25
22.11. Back-feeding Loads ..................................26
22.12. Use in a Tightly Sealed Enclosure ............26
22.13. Mounting Orientations ............................27
The information given in this document is correct to the best of our knowledge and experience at the time of publication. If not
expressly agreed otherwise, this information does not represent a warranty in the legal sense of the word. As the state of our
knowledge and experience is constantly changing, the information in this data sheet is subject to revision. We therefore kindly ask
you to always use the latest issue of this document (available under www.pulspower.com). No part of this document may be
reproduced or utilized in any form without our prior permission in writing.
Some parts of this unit are patent by PULS (US patent No 091662,063, Des. 424,529, …).
TERMINOLOGY AND ABREVIATIONS
PE and symbol PE is the abbreviation for Protective Earth and has the same meaning as the symbol .
Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”.
T.B.D. To be defined, value or description will follow later.
AC 400V A figure displayed with the AC or DC before the value represents a nominal voltage with
standard tolerances included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)
400Vac A figure with the unit (Vac) at the end is a momentary figure without any additional
tolerances included.
50Hz vs. 60Hz As long as not otherwise stated, AC 230V parameters are valid at 50Hz mains frequency.
may A key word indicating flexibility of choice with no implied preference.
shall A key word indicating a mandatory requirement.
should A key word indicating flexibility of choice with a strongly preferred implementation.
2/27
All parameters are typical values specified at 24V, 20A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after
a 5 minutes run-in time unless otherwise noted.
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