AS/NZS 3947.4.1:2001

1 - AS/NZS 3947.4.1:2001 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - CONTACTORS AND MOTOR-STARTERS-ELECTROMECHANICAL CONTACTORS AND
4 - PREFACE
6 - CONTENTS
9 - 1 Scope and object
9 - 1.1 AC and d.c. contactors
10 - 1.2 AC motor-starters
10 - 1.2.1 Direct-on-line (full voltage) a.c. starters
10 - 1.2.2 Reduced voltage a.c. starters
11 - 1.2.3 Rheostatic rotor starters
11 - 1.3 Exclusions
11 - 1.4 Object
12 - 2 Normative references
14 - 3 Definitions
14 - 3.1 Definitions concerning contactors
14 - 3.1.1 contactor (mechanical)
14 - 3.1.2 electromagnetic contactor
14 - 3.1.3 pneumatic contactor
14 - 3.1.4 electro-pneumatic contactor
15 - 3.1.5 latched contactor
15 - 3.1.6 vacuum contactor (or starter)
15 - 3.1.7 position of rest (of a contactor)
15 - 3.2 Definitions concerning starters
15 - 3.2.1 starter
15 - 3.2.2 direct-on-line starter
15 - 3.2.3 reversing starter
15 - 3.2.4 two-direction starter
15 - 3.2.5 reduced voltage starter
16 - 3.2.6 rheostatic starter
16 - 3.2.7 combination starter
16 - 3.2.8 protected starter
16 - 3.2.9 manual starter
16 - 3.2.10 electromagnetic starter
17 - 3.2.11 motor-operated starter
17 - 3.2.12 pneumatic starter
17 - 3.2.13 electro-pneumatic starter
17 - 3.2.14 single-step starter
17 - 3.2.15 two-step starter
17 - 3.2.16 n-step starter
17 - 3.2.17 phase loss sensitive thermal overload relay or release
17 - 3.2.18 under-current (under-voltage) relay or release
17 - 3.2.19 starting time (of a rheostatic starter)
17 - 3.2.20 starting time (of an auto-transformer starter)
18 - 3.2.21 open transition (with an auto-transformer starter or star-delta starter)
18 - 3.2.22 closed transition (with an auto-transformer starter or star-delta starter)
18 - 3.2.23 inching (jogging)
18 - 3.2.24 plugging
18 - 3.3 Characteristic quantities
18 - 3.3.1 Transient recovery voltage (abbreviation: TRV)
18 - 4 Classification
18 - 5 Characteristics of contactors and starters
18 - 5.1 Summary of characteristics
19 - 5.2 Type of equipment
19 - 5.2.1 Kind of equipment
19 - 5.2.2 Number of poles
19 - 5.2.3 Kind of current (a.c. or d.c.)
19 - 5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.)
19 - 5.2.5 Operating conditions of the equipment
19 - 5.3 Rated and limiting values for main circuits
19 - 5.3.1 Rated voltages
21 - 5.3.2 Currents or powers
22 - 5.3.3 Rated frequency
22 - 5.3.4 Rated duties
23 - 5.3.5 Normal load and overload characteristics
26 - 5.3.6 Rated conditional short-circuit current
26 - 5.4 Utilization category
26 - 5.4.1 Assignment of utilization categories based on the results of tests
28 - 5.5 Control circuits
28 - 5.6 Auxiliary circuits
28 - 5.7 Characteristics of relays and releases (overload relays)
28 - 5.7.1 Summary of characteristics
28 - 5.7.2 Types of relay or release
28 - 5.7.3 Characteristic values
29 - 5.7.4 Designation and current settings of overload relays
29 - 5.7.5 Time-current characteristics of overload relays
30 - 5.7.6 Influence of ambient air temperature
30 - 5.8 Co-ordination with short-circuit protective devices
30 - 5.9 Switching overvoltages
30 - 5.10 Types and characteristics of automatic change-over devices and automatic acceleration control devices
30 - 5.10.1 Types
30 - 5.10.2 Characteristics
31 - 5.11 Types and characteristics of auto-transformers for two-step auto-transformer starters
31 - 5.12 Types and characteristics of starting resistors for rheostatic rotor starters
31 - 6 Product information
31 - 6.1 Nature of information
31 - 6.1.1 Identification
32 - 6.1.2 Characteristics, basic rated values and utilization
33 - 6.2 Marking
33 - 6.3 Instructions for installation, operation and maintenance
33 - 7 Normal service, mounting and transport conditions
34 - 8 Constructional and performance requirements
34 - 8.1 Constructional requirements
34 - 8.1.1 Materials
34 - 8.1.2 Current-carrying parts and their connections
34 - 8.1.3 Clearances and creepage distances
34 - 8.1.4 Actuator
34 - 8.1.5 Indication of the contact position
34 - 8.1.6 Additional safety requirements for equipment with isolating function
34 - 8.1.7 Terminals
35 - 8.1.8 Additional requirements for contactors or starters provided with a neutral pole
35 - 8.1.9 Provisions for earthing
35 - 8.1.10 Enclosures for equipment
35 - 8.1.11 Degrees of protection of enclosed contactors and starters
35 - 8.2 Performance requirements
35 - 8.2.1 Operating conditions
38 - 8.2.2 Temperature rise
40 - 8.2.3 Dielectric properties
40 - 8.2.4 Normal load and overload performance requirements
45 - 8.2.5 Co-ordination with short- circuit protective devices
46 - 8.2.6 Switching overvoltages
46 - 8.2.7 Additional requirements for combination starters and protected starters suitable for isolation
46 - 8.3 Electromagnetic compatibility (EMC)
46 - 8.3.1 General
46 - 8.3.2 Immunity
47 - 8.3.3 Emission
47 - 9 Tests
47 - 9.1 Kinds of test
47 - 9.1.1 General
47 - 9.1.2 Type tests
48 - 9.1.3 Routine tests
48 - 9.1.4 Sampling tests
48 - 9.1.5 Special tests
48 - 9.2 Compliance with constructional requirements
49 - 9.3 Compliance with performance requirements
49 - 9.3.1 Test sequences
49 - 9.3.2 General test conditions
49 - 9.3.3 Performance under no load, normal load and overload conditions
58 - 9.3.4 Performance under short-circuit conditions
62 - 9.3.5 Overload current withstand capability of contactors
63 - 9.3.6 Routine tests and sampling tests
64 - 9.4 EMC Tests
64 - 9.4.1 General
64 - 9.4.2 Immunity
65 - 9.4.3 Emission
74 - Annex A - Marking and identification of terminals of contactors and associated overload relays
74 - A.1 General
74 - A.2 Marking and identification of terminals of contactors
77 - A.3 Marking and identification of terminals of overload relays
78 - Annex B - Special tests
78 - B.1 General
78 - B.2 Mechanical durability
80 - B.3 Electrical durability
81 - B.4 Co-ordination at the crossover current between the starter and associated SCPD
86 - Annex C - Clearances and creepage distances for low-voltage contactors and starters
86 - Introduction
86 - C.1 Scope
86 - C.2 Definitions
86 - C.3 General
87 - C.4 Determination of clearances and creepage distances
87 - C.5 Minimum values of clearances and creepage distances
89 - Annex D - Items subject to agreement between manufacturer and user

Applies to a.c. and d.c. contactors and a.c. motor-starters whose main contacts are intended to be connected to circuits, the rated voltage of which does not exceed 1000 volt a.c. or 1500 volt d.c. Specifies requirements for contactors associated with overload or short-circuit protective devices, starters associated with short-circuit and integrated overload protective devices and contactors or starters combined with their own short-circuit protective devices. This Standard is identical to and reproduced from IEC 60947-4-1:2000.

This part of IEC 60947 applies to the types of equipment listed in 1.1 and 1.2 whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.Starters and/or contactors dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection (see 9.3.4) shall form part of the installation but not necessarily of the contactor or the starter.In this context, this standard gives requirements for: contactors associated with overload and/or short-circuit protective devices; starters associated with separate short-circuit protective devices and/or with separate short-circuit and integrated overload protective devices; contactors or starters combined, under specified conditions, with their own short-circuit protective devices. Such combinations, e.g. combination starters (see 3.2.7) or protected starters (see 3.2.8) are rated as units.Circuit-breakers and fuse-combination units used as short-circuit protective devices in combination starters and in protected starters shall comply with the requirements of IEC 60947-2 and IEC 60947-3, as the case may be.Equipment covered by this standard is as follows.

AS 3947.4.1 first published in part as AS C165-1961.
AS C63 first published 1965.
AS C364 first published 1967.
AS C381 first published 1967.
AS C63-1965 revised and redesignated AS 1029-1971.
AS C165-1961 revised and redesignated AS 1023.2-1972.
AS C364-1967 revised and redesignated in part as AS 1202.1-1972.
AS 1202-1972 redesignated AS 1202.1-1972.
Second edition AS 1029-1974.
AS C381-1967 revised and redesignated AS 1202.2-1976, AS 1202.3-1976 and AS 1202.4-1976.
Second edition AS 1202.1-1981.
AS 1029-1974 revised and redesignated in part as AS 1029.1-1982.
Second edition AS 1029.1-1985.
Second edition AS 1023.2-1989.
AS 1023.2-1989, AS 1029.1-1985, AS 1201.1-1981, AS 1202.2-1976, AS 1202.3-1976 and AS 1202.4-1976 revised, amalgamated and redesignated AS 3947.4.1-1995.
Second edition 2001.