AS/NZS 3947.4.2:2000

1 - AS/NZS 3947.4.2:2000 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - CONTACTORS AND MOTOR-STARTERS-A.C. SEMICONDUCTOR MOTOR CONTROLL
4 - PREFACE
6 - CONTENTS
9 - 1 Scope and object
10 - 2 Normative references
12 - 3 Definitions
12 - 3.1 Definitions concerning a. c. semiconductor motor control devices
12 - 3.1.1 AC semiconductor motor controllers and starters
14 - 3.1.2 Hybrid motor controllers and starters
15 - 3.1.3 current-limit function
15 - 3.1.4 manoeuvre
15 - 3.1.5 controlled acceleration
15 - 3.1.6 controlled deceleration
15 - 3.1.7 controlled running
15 - 3.1.8 prospective locked rotor current
15 - 3.1.9 ON-state
15 - 3.1.10 FULL-ON (state of controllers)
15 - 3.1.11 minimum load current
16 - 3.1.12 OFF-state
16 - 3.1.13 OFF-state ;ealage cirremt
16 - 3.1.14 operation (of a controller)
16 - 3.1.15 operating cycle (of a controller)
16 - 3.1.16 operating capability
16 - 3.1.17 overload current profile
16 - 3.1.18 rating index
16 - 3.1.19 tripping operation (of a controller or starter)
16 - 3.1.20 trip-free controller or starter
16 - 3.1.21 phase loss sensitive thermal overload relay or release
16 - 3.1.22 ON-time
17 - 3.1.23 OFF-time
17 - 3.2 EMC definitions
17 - 3.2.1 electromagnetic compatibility EMC (abbreviation)
17 - 3.2.2 electromagnetic emission
17 - 3.2.3 electromagnetic disturbance
17 - 3.2.4 radio (frequency) disturbance
17 - 3.2.5 radio frequency interference, RFI (abbreviation)
17 - 3.2.6 transient (adjective and noun)
17 - 3.2.7 burst (of pulses or oscillations)
17 - 3.2.8 voltage surge
18 - 4 Classification
18 - 5 Characteristics of a. c. semiconductor motor controllers and starters
18 - 5.1 Summary of characteristics
18 - 5.2 Type of equipment
18 - 5.2.1 Form of equipment
18 - 5.2.2 Number of poles
18 - 5.2.3 Kind of current
18 - 5.2.4 Interrupting medium (air, vacuum, etc.)
18 - 5.2.5 Operating conditions of the equipment
19 - 5.3 Rated and limiting values for main circuits
19 - 5.3.1 Rated voltages
19 - 5.3. 2 Currents
21 - 5.3.3 Rated frequency
21 - 5.3.4 Rated duty
22 - 5.3.5 Normal load and overload characteristics
23 - 5.3.6 Rated conditional short-circuit current
23 - 5.4 Utilization category
23 - 5.4.1 Assignment of ratings based on the results of tests
24 - 5.5 Control circuits
25 - 5.6 Auxiliary circuits
25 - 5.7 Characteristics of relays and releases (overload relays)
25 - 5.8 Co-ordination with short-circuit protective devices (SCPD)
25 - 5.9 Switching overvoltages
25 - 6 Product information
25 - 6.1 Nature of information
26 - 6.2 Marking
27 - 6.3 Instructions for installation, operation, and maintenance
27 - 7 Normal service, mounting and transport conditions
27 - 7.1 Normal service conditions
27 - 7.1.1 Ambient air temperature
27 - 7.1.2 Altitude
27 - 7.1.3 Atmospheric conditions
27 - 7.1.4 Shock and vibrations
28 - 7.2 Conditions during transport and storage
28 - 7.3 Mounting
28 - 7.4 Electrical system disturbances and influences
28 - 8 Constructional and performance requirements
28 - 8.1 Constructional requirements
28 - 8.1.1 Materials
28 - 8.1.2 Current-carrying parts and connections
28 - 8.1.3 Clearances and creepage distances
28 - 8.1.4 Vacant
28 - 8.1.5 Vacant
28 - 8.1.6 Vacant
28 - 8.1.7 Terminals
28 - 8.1.8 Vacant
28 - 8.1.9 Provisions for earthing
28 - 8.1.10 Enclosures for equipment
28 - 8.1.11 Degrees of protection of enclosed controllers and starters
29 - 8.2 Performance requirements
29 - 8.2.1 Operating conditions
30 - 8.2.2 Temperature rise
30 - 8.2.3 Dielectric properties
31 - 8.2.4 Normal load and overload performance requirements
36 - 8.2.5 Co-ordination with short-circuit protective devices
36 - 8.2.6 Switching overvoltages
37 - 8.3 EMC requirements
37 - 8.3.1 General
37 - 8.3.2 Emission
38 - 8.3.3 Immunity
40 - 9 Tests
40 - 9.1 Kinds of tests
40 - 9.1.1 General
40 - 9.1.2 Type tests
40 - 9.1.3 Routine tests (9.3.6)
40 - 9.1.4 Sampling tests (9.3.6)
41 - 9.1.5 Special tests (9.4)
41 - 9.2 Compliance with constructional requirements
41 - 9.3 Compliance with performance requirements
41 - 9.3.1 Test sequences
42 - 9.3.2 General test conditions
42 - 9.3.3 Performance under no load, normal load, and overload conditions
49 - 9.3.4 Performance under short-circuit conditions
52 - 9.3.5 EMC tests
55 - 9.3.6 Routine and sampling tests
56 - 9.4 Special tests
56 - 9.4.1 Discrimination between overload relays and SCPDs
57 - Annex A - Marking and identification of terminals
57 - A.1 General
57 - A.2 Marking and identification of terminals of semiconductor controllers and starters
57 - A.2.1 Marking and identification of terminals of main circuits
57 - A.2.2 Marking and identification of terminals of control circuits
57 - A.2.3 Marking and identification of auxiliary circuits
59 - A.3 Marking and identification of terminals of overload relays
60 - Annex B - Overload relays or releases
60 - B.1 Characteristics of overload relays and releases
60 - B.1.1 Summary of characteristics
60 - B.1.2 Types of overload relay or release
60 - B.1.3 Characteristic values
61 - B.1.4 Designation and current settings of overload relays
61 - B.1.5 Time-current characteristics of overload relays
61 - B.1.6 Influence of ambient air temperature
62 - B.2 Performance requirements
62 - B.2.1 Limits of operation of overload relays
63 - B.3 Operating limits test conditions
65 - Annex C - Discrimination between overload protective devices and SCPDs
65 - C.1 Discrimination between protective devices and SCPDs
65 - C.1.1 General
65 - C.1. 2 Condition for the test
65 - C.1.3 Test currents and test circuits
65 - C.2 Test procedure and results to be obtained
65 - C.2.1 Test procedure
66 - C.2.2 Results to be obtained
67 - Annex D - Requirements for radiated emission testing
67 - D.1 Characteristics of controllers and starters
67 - D.2 Radiated emissions
67 - D.2.1 Main power circuits
67 - D.2.2 Control and auxiliary circuits
69 - Annex E - Method of converting CISPR 11 radiated emission limits to transmitted power equivalents
70 - Annex F - Operating capability
73 - Annex G - Examples of control circuit configurations
73 - G.1 External control device (ECD)
73 - G.1.1 Definition of an ECD
73 - G.1.2 Diagrammatic representation of an ECD
73 - G.1.3 Parameters of an ECD
73 - G.2 Control circuit configurations
73 - G.2.1 Controllers with external control supply
74 - G.2.2 Controllers with an internal control supply and control input only

Applies to controllers and starters intended to be connected to circuits, the rated voltage of which does not exceed 1000 volt a.c. and which uses power semi-conductor switching elements for simple starting and stopping, manoeuvring and controlled running of induction motors. This Standard is identical in technical content and reproduced from IEC 60947-4-2:1999.

This standard applies to controllers and starters, which may include a series mechanical switching device, intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. This standard characterizes controllers and starters for use with and without bypass switching devices. Controllers and starters dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection (see 8.2.5) should form part of the installation, but not necessarily of the controller or starter. In this context, this standard gives requirements for controllers and starters associated with separate short-circuit protective devices. This standard does not apply to: continuous operation of a.c. motors at motor speeds other than the normal speed; semiconductor equipment, including semiconductor contactors (see 2.2.13 of IEC 60947-1) controlling non-motor loads; electronic a.c. power controllers covered by IEC 60146. Contactors and control circuit devices used in controllers and starters should comply with the requirements of their relevant product standard. Where mechanical switching devices are used, they should meet the requirements of their own IEC product standard, and the additional requirements of this standard. The object of this standard is to state as follows: the characteristics of controllers and starters and associated equipment; the conditions with which controllers and starters shall comply with reference to:a) their operation and behaviour;b) their dielectric properties;c) the degrees of protection provided by their enclosures where applicable;d) their construction; the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests; the information to be given with the equipment, or in the manufacturer's literature.

First published in Australia as AS 1202.5-1985.
Revised and redesignated as AS 3947.4.2-1997.
Jointly revised and redesignated as AS/NZS 3947.4.2:2000.