EN 61204:1995

SLOVENSKI STANDARD
01-julij-1999
Low-voltage power supply devices, d.c. output - Performance characteristics and
safety requirements (IEC 61204:1993)
Low-voltage power supply devices, d.c. output - Performance characteristics
Stromversorgungsgeräte für Niederspannung mit Gleichstromausgang - Eigenschaften
Dispositifs d'alimentation à basse tension à sortie en courant continu - Caractéristiques
de fonctionnement
Ta slovenski standard je istoveten z: EN 61204:1995
ICS:
29.160.40 (OHNWULþQLDJUHJDWL Generating sets
29.200 8VPHUQLNL3UHWYRUQLNL Rectifiers. Convertors.
6WDELOL]LUDQRHOHNWULþQR Stabilized power supply
QDSDMDQMH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STANDARD
First edition
1993-02
Dispositifs d'alimentation à basse tension,
à sortie en courant continu -
Caractéristiques de fonctionnement
et prescriptions de sécurité
Low-voltage power supply devices,
d.c. output -
characteristics and
Performance
safety requirements
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© CEI 1993
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- 3 -
1204 ©IEC: 1993
CONTENTS
Page
FOREWORD 7
INTRODUCTION 9
Clause
1 General
1.1 Scope and object
1.2 Normative references
1.3 Definitions
Presentation of performance characteristics 15
3 Performance
3.1 Rated outputs and total output power
3.2 Ambient operating temperature range
3.3 Ambient storage and transit temperature range
21 3.4 Source voltage and frequency
3.5 Source current
3.6 Source effect (source regulation)
25 Load effect (load regulation) 3.7
Output voltage tolerance (intrinsic error) - fixed outputs 25
3.8
Adjustability of output voltage 3.9
3.10 Periodic and random deviation
3.11 Interaction effects (cross regulation)
3.12 Temperature coefficient 29
3.13 Hold-up time (turn-off decay time)
3.14 Start-up time (turn-on delay time)
3.15 Turn-on (turn-off) overshoot
3.16 Transient response to load current changes
3.17 Output overvoltage protection
3.18 Output overcurrent protection
3.19 Mean time between failures (MTBF) 35
4 Requirements for safety
4.1 General
4.2 Creepage distances, clearances and distances through insulation
4.3 Electric strength 35
4.4 Earth leakage current
4.5 Flammability
4.6 Thermal requirements
4.7 Protective devices
1204 ©IEC: 1993 — 5 —
Page
Clause
5 Interference requirements
5.1 Noise level
5.2 Conducted EMI
5.3 Radiated EMI (magnetic component) 37
Input transient voltage 39
5.4
6 Additional requirements
6.1 Remote programming (remote control)
6.2 Remote sensing
6.3 Mechanical characteristics
41 6.4 Series operation
6.5 Parallel operation 41
Monitoring and control signals 6.6
7 Test requirements 41
7.1 41
General
7.2 Environmental tests
Miscellaneous requirements 43
8.1 Markings and instructions
ANNEXES
A Periodic and random deviation test methods
B Output overvoltage protection
C Overcurrent protection characteristics
D Parallel operation 55
1204 ©IEC: 1993 - 7 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
LOW-VOLTAGE POWER SUPPLY DEVICES,
D.C. OUTPUT - PERFORMANCE CHARACTERISTICS
AND SAFETY REQUIREMENTS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
This International Standard IEC 1204 has been prepared by sub-committee 22E: Stabi-
lized power supplies, of IEC technical committee 22: Power electronics.
The text of this standard is based on the following documents:
DIS Report on Voting
22E(CO)24 22E(CO)26
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.
Annexes A to D form an integral pa rt of this standard.

1204 © I EC: 1993 - 9 -
INTRODUCTION
This International Standard, based on the British Standard BS6688: 1986, has been
reworked and extended to take into account existing and forthcoming IEC standards. With
regard to safety, there was close collaboration with IEC technical committee 74, working
group 6: Safety requirements for power supplies.

1204 © IEC: 1993 - 11 -
LOW-VOLTAGE POWER SUPPLY DEVICES,
D.C. OUTPUT - PERFORMANCE CHARACTERISTICS
AND SAFETY REQUIREMENTS
1 General
1.1
Scope and object
This international Standard describes a method for specifying requirements for low-voltage
power supply devices (including switching types) providing d.c. output(s) up to 200 V d.c.
at a power level of up to 30 kW, operating from a.c. or d.c. source voltages of up to 600 V.
The devices are for use within class I equipment or for free-standing operation when used
with adequate electrical and mechanical protection.
This standard is intended to cover all types of a.c. or d.c. driven units with any number of
outputs including power supply devices used in military, industrial, telecommunications
and commercial applications. Special considerations apply for medical applications and
toys.
It permits to specify a power unit to meet a particular application by the specification of
parameters at required performance levels, to establish the essential definitions related to
ormance. These levels
this type of equipment, and to establish a selection of levels of pe rf
are carefully graded to enable manufacturers and users to select and specify a range of
power supply devices suitable for their application.
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this International Standard. At the time of publication, the
rties
editions indicated were valid. All normative documents are subject to revision, and pa
to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated
below. Members of IEC and ISO maintain registers of currently International Standards.
IEC standard voltages
IEC 38: 1983,
IEC 68: Environmental testing
Environmental testing - Part 2: Tests - Test A: Cold
IEC 68-2-1: 1990,
IEC 68-2-2: 1974, Environmental testing - Part 2: Tests - Test B: Dry heat
IEC 68-2-3: 1985, Environmental testing - Pa rt 2: Tests - Test Ca: Damp heat, steady
state
IEC 68-2-6: 1982, Environmental testing - Pa rt 2: Tests - Test Fc and guidance: Vibration
(sinusoidal)
1204 © IEC: 1993 - 13 -
IEC 68-2-27: 1987, Environmental testing - Part 2: Tests - Test Ea and Guidance: Shock
IEC 68-2-29: 1987, Environmental testing - Part 2: Tests - Test Eb and Guidance: Bump
IEC 478: Stabilized power supplies, d.c. output
IEC 478-1: 1974, Stabilized power supplies, d.c. output - Part 1: Terms and definitions
Stabilized power supplies, d.c. output - Part 2: Rating and performance
IEC 478-2: 1986,
Stabilized power supplies, d.c. output - Part 3: Reference levels and
IEC 478-3: 1989,
measurement of conducted electromagnetic interference (EMI)
Stabilized power supplies, d.c. output - Pa rt 4: Tests other than
IEC 478-4: 1976,
radio-frequency interference
Stabilized power supplies, d.c. output - Part 5: Measurement of the
IEC 478-5: 1993,
magnetic component of the reactive near field
IEC 651: 1979, Sound level meters
IEC 664-1: 1992, Insulation co-ordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests
IEC 721: Classification of environmental conditions
IEC 721-3-1: 1987, Classification of environmental conditions - Part 3: Classification of
groups of environmental parameters and their severities. Storage
IEC 721-3-2: 1985, Classification of environmental conditions - Part 3: Classification of
rt
groups of environmental parameters and their severities. Transpo
Electromagnetic compatibility for industrial-process measurement and control
IEC 801:
equipment
IEC 801-4: 1988, Electromagnetic compatibility for industrial-process measurement and
control equipment - Part 4: Electrical fast transient/burst requirements
IEC 950: 1991, Safety of information technology equipment, including electrical business
equipment
MIL-HDBK-217E: 1974, Reliability prediction of electronic equipment
1.3 Definitions
For the purpose of this International Standard the definitions given in IEC 950 and IEC 478-1
apply, except where redefined in this standard.

1204 © IEC: 1993 - 15 -
2 Presentation of performance characteristics
The performance characteristics are detailed in 3.1 to 8.1 and are in accordance with the
performance criteria listed in table Ill of IEC 478-2.
The performance figure defines the maximum change (not typical) in the measured
quantity which may be either positive or negative unless specified otherwise. Note that this
implies that a 1 % change may mean a maximum difference of 2 % between quantities
measured on a number of units.
ormance parameters are measured at 25 °C unless otherwise stated.
The pe rf
rformance characteristics shall be as stated in table Ill of IEC 478-2.
Tests relating to pe
Where a specific instruction appears to conflict with that indicated in table I or Ill, this
standard shall take precedence.
The pe rformance characteristics presentation of table I illustrates a typical application.
The indication of the present IEC publication subclause numbering is mandatory. The
ormance figure indicates that no requirements exist. Indicating the
absence of a pe rf
performance letter coding within brackets is optional.
3 Performance
3.1 Rated outputs and total output power
ormance levels of the unit shall be stated for each parameter.
The output voltages and pe rf
For a multiple output power supply, performance levels shall be indicated for each output.
The manufacturer/(user) shall confirm/(specify) that the variations in output voltage of the
unit comply with the stated limits given in 3.2 to 3.18, as appropriate, under the least
favourable combination of source voltage, load and temperature at the stated output level
of the unit.
The manufacturer/(user) shall confirm /(specify) the minimum load value for the controlling
output in a multiple output power supply that is required to maintain any other parameter
within the specification. The nature of each output and its polarity, if fixed, shall also be
stated or specified.
If the loads are defined by the customer, then the rated value of these loads shall be used
in performance measurements. In all other cases, the output to be measured shall be at
maximum, other outputs at 50 % of their rated output load, and voltage input of the power
supply shall be at rated value.
The manufacturer/(user) shall confirm/(specify) the total output power at one of the
preferred high ambient operating temperatures of 3.2.

1204 © IEC: 1993 - 17 -
Table 1 - Performance characteristics presentation
IEC 1204
Clause/subclause
Main output: 5 V 150 A
Rated outputs
15 A
3.1 Aux. 1: 12 V
Aux. 2: 24 V 8 A
Total output power 1 000 W at 50 °C
Ambient operating temperature range Low: 0 °C (D)
3.2 High: 50 °C (D)
(70 °C with de-rating of 2,5 %/°C above
50 °C) Forced air cooled, internal fan
Ambient storage temperature range –40 °C to +85 °C (A)
3.3
Source voltage and frequency Low: 88 V to 132 V (C)
High: 176 V to 264 V (C)
3.4
Frequency range: 48 Hz to 63 Hz
Source current
True R.M.S 20 A at 88 V input; 10 A at 176 V
Peak repetitive 50 A at 88 V input; 25 A at 176 V
30 A
3.5 Peak inrush
0,65
Harmonic distortion
Power factor 0,65
0,70
Efficiency
Auxiliary output
Main output
3.6 Source regulation 0,1 % (A) 0,1 % (A)
0,2 % (A) 0,2 % (A)
3.7 Load regulation
0 to 100 % (A) 0 to 100 % (A)
Load change
3.8 Intrinsic error N/A N/A
Adjustability of voltage output
3.9 Span 80% to 120% 80% to 120%
Resolution 1 % 1 %
Periodic and random deviation
3.10 a) Source frequency 0,1 % (A) 0,1 % (A)
0,5 % (A) 0,5 % (A)
b) Switching frequency
(B)
c) Total (30 MHz) 1 % (B) 1 %
0,2 % (A) 0,2 % (A)
3.11 Cross regulation
0 to 100 % (A)
Load change 0 to 100 % (A)
...