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BSI PD IEC TS 60034-34:2020 2023

BSI PD IEC TS 60034-34:2020 2023

$215.11

Rotating electrical machines – AC adjustable speed rolling mill motors

Published By Publication Date Number of Pages
BSI 2023 74
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
8 FOREWORD
10 INTRODUCTION
11 1 Scope
2 Normative references
3 Terms and definitions
3.1 Terms and definitions
15 3.2 Terms and definitions for adjustable speed control and rolling operation
16 3.3 Terms and definitions for adjustable speed drive system
17 3.4 Terms and definitions for monitoring and protection sequence
3.5 Terms and definitions for motor installation and site trial operation
18 3.6 Terms and definitions for test
19 4 Terminal voltage determination
20 Figures
Figure 1 – Example of induction motor terminal voltage versus speed
Figure 2 – Example of synchronous motor terminal voltage versus speed
21 5 Duty type and temperature class
5.1 General
5.2 Selection of rolling operation pattern
22 5.3 Evaluation of winding temperature deviation during one rolling cycle
5.4 Duty type S1 or S9 selection
Tables
Table 1 – Thermal life shortening due to the super-temperature in one rolling cycle
23 5.5 Class B rise or Class F rise selection
5.6 Overload current duration time limit based on winding temperature deviation in one rolling cycle for RMS current of 100 %
Figure 3 – Selection of motor temperature rise based on the temperaturedeviation in one rolling cycle and shock load conditions
24 6 Continuous overload capability
6.1 General
Figure 4 – Example of overload current duration time limit based on winding temperature deviation between maximum and mean,in one rolling cycle RMS current of 100 %
25 6.2 Relative thermal life index of TL value estimation by simplified method
26 6.3 Relative thermal life estimation by precise method
Figure 5 – Example of discrete constant loads with 115 % continuous overload
27 6.4 Relative thermal life index of TL value determination by precise method
7 Mechanical requirements
7.1 General
7.2 Mechanical strength for shaft and other transmission parts considering torsional vibration
7.3 Vibration transmitted through the motor base
7.4 Tangential forces applied to rotor and stator
7.5 Thrust load
7.5.1 General
7.5.2 Frequently applied thrust load
28 7.5.3 Occasionally applied maximum thrust load
7.5.4 Emergency maximum thrust load
7.6 Radial load for bearings
7.7 Overspeed
7.8 Stator coil end fixation
7.9 Stator shift construction for maintenance inspection
7.10 Mounting code application
8 Withstand voltage capability
8.1 Rotor bars or damper bars and short-circuit rings
29 8.2 General
8.3 Withstand voltage test
8.4 Withstand voltage capability
8.4.1 General
8.4.2 Ground insulation
30 Figure 6 – 2-level inverter configuration, waveform and switching surge voltage
Figure 7 – 3-level inverter configuration, waveform and switching surge voltage
31 8.4.3 Turn-to-turn insulation
9 Factory tests and recommended site operation tests
9.1 General
9.1.1 General scope for the tests
9.1.2 Requirements of the site operation test where vector control is applied
32 9.2 Factory test
9.3 Preparation before trial operation at site
9.3.1 General
33 9.3.2 Calibration of feedback signals for the converter
9.3.3 Insulation resistance tests for motor
9.3.4 Insulation resistance tests for bearings
9.3.5 Performance test for bearing lubrication oil supply unit
9.3.6 Confirmation of lubrication oil surface level for bearings
9.3.7 Performance test for cooling systems
9.3.8 Confirmation of alarm issue levels for motor protection
34 9.3.9 Synchronous motor pole position confirmation test
9.4 Site uncoupled trial operation
9.4.1 General
9.4.2 Rotational speed build-up test
9.4.3 Bearing temperature rise test
9.5 Site no-load characteristic test
9.5.1 Induction motor no-load characteristics test
35 9.5.2 Synchronous motor no-load characteristics test
9.5.3 No-load characteristics test record
9.6 Site acceleration and deceleration test
36 10 Grounding
10.1 General
10.2 Protection against bearing currents
10.3 Protective earthing (PE)
10.4 Functional earthing (FE)
37 11 Rating plate
Figure 8 – Example of protective earthing and functional earthing
38 Annex A (normative)Short-time overload capability
A.1 General
A.2 Frequently applied Art-1 short-time overload capability specification
39 Figure A.1 – Art-1 short-time overload capability of Type-A motors
40 Figure A.2 – Art-1 short-time overload capability of Type-B motors
Table A.1 – Art-1 short-time overload capability of Type-A motors
41 A.3 Frequently applied Art-2 short-time overload capability specification
Table A.2 – Art-1 short-time overload capability of Type-B motors
42 Figure A.3 – Art-2 short-time overload capability of Type-A motors
Table A.3 – Art-2 short-time overload capability of Type-A motors
43 Figure A.4 – Art-2 short-time overload capability of Type-B motors
Table A.4 – Art-2 short-time overload capability of Type-B motors
44 Annex B (normative)Rolling operation pattern designation
B.1 General
B.2 Rolling operation pattern for hot reversing rolling
45 B.3 Rolling operation pattern for hot continuous rolling of sheet strip
Figure B.1 – Typical rolling operation pattern for hot reversing rolling
46 B.4 Rolling operation pattern for continuous caster directly connected hot continuous rolling mills
Figure B.2 – Typical rolling operation for hot continuous rolling of sheet strip
47 B.5 Rolling operation pattern for hot continuous rolling for wire and rod mills
Figure B.3 – Typical rolling operation pattern for continuous casterconnected hot continuous rolling for sheet strip
48 B.6 Rolling operation pattern for cold reversing rolling mills
Figure B.4 – Typical rolling operation pattern for hot continuous rolling for wire and rod mills
49 B.7 Rolling operation pattern for cold continuous rolling
Figure B.5 – Typical rolling operation pattern for cold reversing rolling mills
50 B.8 Operation pattern for coilers and reels
Figure B.6 – Typical rolling operation pattern for cold continuous rolling
51 Figure B.7 – Typical rolling operation pattern for coilers and reels
52 Annex C (informative)Determination of winding temperature deviation in one rolling cycle
C.1 General
C.2 Simplified method for estimation of the winding temperature deviation between maximum and mean values in one rolling cycle
Figure C.1 – Winding temperature rise as a step response for the first order delay system with the winding thermal equivalent time constant of T
53 Table C.1 – Calculation example for repetitive 225 % overload current with RMS = 1,0
54 C.3 Precise method for estimation of the winding temperature deviation between maximum and mean in one rolling cycle
Figure C.2 – Numerical calculation result for the condition in Table C.1
Figure C.3 – Equivalent rectangular current waveform introduction
56 Figure C.4 – Torque, speed, and current deviation in one rollingcycle for hot strip mill finishing motor
57 Figure C.5 – An example of winding temperature deviation estimationin one rolling cycle by the precise method
58 Table C.2 – An example of winding temperature deviation estimationin one rolling cycle by the precise method
59 Annex D (informative)Evaluation of reduced insulation life
60 Figure D.1 – Example of stator coil insulation surface crackcaused by repetitive mechanical stress
61 Annex E (informative)Control system configuration for the assumed adjustablespeed rolling mill induction motors
E.1 Induction motor model and controller configuration
62 Figure E.1 – Example configuration of induction motor (IM) control system
64 E.2 Significance of acceleration and deceleration tests
65 Annex F (informative)Control system configuration for the assumed adjustablespeed rolling mill synchronous motors
F.1 Control device configuration and synchronous machine model
66 Figure F.1 – Principle of armature reaction compensation
67 Figure F.2 – Example configuration of synchronous motor (SM) control system
68 F.2 Significance of acceleration and deceleration tests
Figure F.3 – Armature current and field current waveform example for the adjustable speed rolling mill synchronous motor for reversing rotational direction mill
69 F.3 Magnetic pole position confirmation test
70 Annex G (informative)Mounting code application for the rolling mill motor special cases
G.1 General
G.2 IM code application for the twin-drive rolling mill configuration
G.2.1 General
G.2.2 IM code application for common base configuration
71 G.3 IM code application for sub-base insertion under the motor base for lifting-up motor shaft centre
Figure G.1 – IM code application for bottom forward twin driveconfiguration with common motor bases
72 G.4 Coupling supply for cylindrical shaft extension
Figure G.2 – IM code application for sub-base insertion underthe motor base for increasing motor shaft centre
73 Bibliography

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BSI PD IEC TS 60034-34:2020 2023
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