🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN 60034-18-42:2017 – TC:2020 Edition

BS EN 60034-18-42:2017 – TC:2020 Edition

$246.62

Tracked Changes. Rotating electrical machines – Partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters – Qualification tests

Published By Publication Date Number of Pages
BSI 2020 117
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

IEC 60034-18-42:2017 defines criteria for assessing the insulation system of stator/rotor windings of single or polyphase AC machines which are subjected to repetitive impulse voltages, such as those generated by pulse width modulation (PWM) converters, and are expected to experience and withstand partial discharge activity during service. It specifies electrical qualification tests on representative specimens to verify fitness for operation with voltage-source converters. It also describes an additional classification system which defines the limits of reliable performance under converter-fed conditions.

PDF Catalog

PDF Pages PDF Title
67 National foreword
70 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
72 English
CONTENTS
75 FOREWORD
77 INTRODUCTION
78 1 Scope
2 Normative references
79 3 Terms and definitions
82 4 Machine terminal voltages arising from converter operation
Figures
Figure 1 – Voltage impulse waveshape parameters
83 Figure 2 – Waveform representing one complete cycle of the phase to phase voltage at the terminals of a machine fed from a 3-level converter
Tables
Table 1 – Examples of the values of characteristics of the terminal voltages for two converter-fed machines
84 Figure 3 – Jump voltage (Uj) at the terminals of a machine fed from a converter drive
85 5 Electrical stresses in the insulation system of machine windings
5.1 General
Figure 4 – Maximum voltage enhancement at the machine terminals at infinite impedance as a function of cable length for various impulse rise times
86 5.2 Voltages stressing the phase to phase insulation
5.3 Voltages stressing the phase to ground insulation
5.4 Voltages stressing the turn to turn insulation
5.4.1 General
5.4.2 Random-wound windings
Figure 5 – Example of a random-wound design
Figure 6 – Example of a form-wound design
87 5.4.3 Form-wound windings
6 Voltage rating for Type II insulation systems
Figure 7 – Worst case voltage stressing the turn to turn insulation in a variety of random-wound stators as a function of the rise time of the impulse
88 7 Stress factors for converter-fed Type II insulation systems
Table 2 – Influence of features of the converter drive voltage on acceleration of ageing of components of Type II insulation systems
89 8 Qualification tests
8.1 General
8.2 Qualification tests
90 9 Qualification of mainwall insulation system
9.1 General
9.2 Test methods
92 9.3 Use of 50 Hz or 60 Hz life data to predict the service life with a converter drive
93 10 Qualification of turn insulation
10.1 General
Figure 8 – Example of a life curve for a Type II mainwall insulation system
94 10.2 Test methods
95 11 Qualification of the stress control system
11.1 General
Figure 9 – Example of a life curve for turn insulation
96 11.2 Test methods
97 12 Preparation of test objects
12.1 General
12.2 Mainwall specimens
12.3 Turn to turn specimens
12.4 Stress control specimens
13 Qualification test procedures
13.1 General
13.2 Mainwall insulation
98 13.3 Turn to turn insulation
13.4 Stress control system
99 14 Qualification test pass criteria
14.1 Mainwall insulation
14.2 Turn to turn insulation
14.3 Stress control system
15 Routine test
100 16 Optional screening tests
17 Analysis, reporting and classification
101 Annex A (informative) Contributions to ageing of the mainwall insulation
A.1 Life time consumption of the mainwall insulation
A.2 Calculation of the contributions to ageing from a 3-level converter drive
Figure A.1 – Representation of the phase to ground voltage at the terminals of a machine fed from a 3-level converter
102 A.3 Calculation to derive an equivalent voltage amplitude and frequency
Table A.1 – Contribution to electrical ageing by 1 kHz impulses from a 3-level converter as a percentage of the ageing from the 50 Hz fundamental voltage (endurance coefficient of 10)
103 Figure A.2 – Ratio of the life time consumption (y-axis) of impulse voltage (Upk/pk) to fundamental voltage (U’pk/pk) expressed as a percentage for various impulse/fundamental frequency ratios (n=10)
104 Annex B (informative) Examples of circuits for impulse testing
B.1 Impulse test circuit using a semiconducting switch
B.2 Typical waveform generated from the impulse generator
Figure B.1 – Example of a simple converter voltage simulation circuit
105 B.3 Alternative impulse test circuit using a semiconducting switch
Figure B.2 – Typical waveform generated from the impulse generator
106 Figure B.3 – Example of a simple converter voltage simulation circuit
Figure B.4 – Typical waveform generated from the impulse generator
107 Annex C (informative) Derivation of the short term endurance test voltage
108 Annex D (informative) Derivation of the impulse voltage insulation class for the machine insulation
Table D.1 – Phase to ground test voltages according to IVIC for Type II insulation systems
109 Table D.2 – Impulse voltage insulation classes (IVIC)
110 Annex E (normative) Derivation of an IVIC in the absence of a manufacturer’s reference life line
E.1 Derivation of an IVIC from endurance tests
E.1.1 Mainwall insulation
Figure E.1 – Reference life line for mainwall insulation
111 E.1.2 Turn insulation
E.1.3 Stress control system
E.2 Derivation of the IVIC X on the basis of satisfactory service experience
E.3 Derivation of an IVIC S on the basis of satisfactory service experience
112 Annex F (informative) Optional screening tests
F.1 General
F.2 Short term endurance test on the mainwall insulation
F.3 Voltage withstand test
113 Bibliography

Related products

BS EN 60034-18-42:2017 - TC
$246.62