AS/NZS 3947.4.3:2000

1 - AS/NZS 3947.4.3:2000 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - CONTACTORS AND MOTOR-STARTERS-A.C. SEMICONDUCTOR CONTROLLERS....
4 - PREFACE
6 - CONTENTS
8 - INTRODUCTION
9 - 1 Scope and object
10 - 2 Normative references
12 - 3 Definitions
12 - 3.1 Definitions concerning a.c. semiconductor (non-motor-load) control devices
12 - 3.1.1 AC semiconductor controllers and contactors (solid-state contactors)
14 - 3.1.2 Hybrid controllers and contactors (see figure 1)
15 - 3.1.3 current-limit function
15 - 3.1.4 load control
15 - 3.1.5 ramp-up
15 - 3.1.6 ramp-down
15 - 3.1.7 controlled operation
15 - 3.1.8 Vacant
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 leakage current (IL)
16 - 3.1.14 operation (of a controller)
17 - 3.1.15 operating cycle (of a controller)
17 - 3.1.16 operating capability
17 - 3.1.17 overload current profile
17 - 3.1.18 rating index
17 - 3.1.19 tripping operation (of a controller)
17 - 3.1.20 trip-free controller
17 - 3.1.21 overcurrent protective means OCPM
17 - 3.1.22 ON-time
18 - 3.1.23 OFF-time
18 - 3.2 EMC definitions
18 - 3.2.1 electromagnetic compatibility, EMC (abbreviation)
18 - 3.2.2 (electromagnetic) emission
18 - 3.2.3 electromagnetic disturbance
18 - 3.2.4 radio(frequency) disturbance
18 - 3.2.5 radiofrequency interference; RFI (abbreviation)
18 - 3.2.6 transient (adjective and noun)
18 - 3.2.7 burst (of pulses or oscillations)
18 - 3.2.8 voltage surge
19 - 3.2.9 immunity (to a disturbance)
19 - 4 Classification
19 - 5 Characteristics of a.c. semiconductor controllers and contactors
19 - 5.1 Summary of characteristics
19 - 5.2 Type of equipment
19 - 5.2.1 Form of equipment
19 - 5.2.2 Number of poles
19 - 5.2.3 Kind of current
19 - 5.2.4 Interrupting medium (air, vacuum, etc.)
19 - 5.2.5 Operating conditions of the equipment
22 - 5.3 Rated and limiting values for main circuits
22 - 5.3.1 Rated voltages
22 - 5.3.2 Currents
22 - 5.3.3 Rated frequency
22 - 5.3.4 Rated duty
23 - 5.3.5 Normal load and overload characteristics
24 - 5.3.6 Rated conditional short-circuit current
24 - 5.4 Utilization category
25 - 5.4.1 Assignment of ratings based on the results of tests
26 - 5.5 Control circuits
26 - 5.6 Auxiliary circuits
26 - 5.7 Vacant
26 - 5.8 Coordination with short-circuit protective devices (SCPD)
26 - 5.9 Switching overvoltages
26 - 6 Product information
26 - 6.1 Nature of information
28 - 6.2 Marking
28 - 6.3 Instructions for installation, operation and maintenance
28 - 7 Normal service, mounting and transport conditions
28 - 7.1 Normal service conditions
28 - 7.1.1 Ambient air temperature
28 - 7.1.2 Altitude
28 - 7.1.3 Atmospheric conditions
29 - 7.1.4 Shock and vibrations
29 - 7.2 Conditions during transport and storage
29 - 7.3 Mounting
29 - 7.4 Electrical system disturbances and influences
29 - 8 Constructional and performance requirements
29 - 8.1 Constructional requirements
29 - 8.1.1 Materials
29 - 8.1.2 Current-carrying parts and connections
29 - 8.1.3 Clearances and creepage distances
29 - 8.1.4 Vacant
29 - 8.1.5 Vacant
29 - 8.1.6 Vacant
29 - 8.1.7 Terminals
30 - 8.1.8 Vacant
30 - 8.1.9 Provisions for earthing
30 - 8.1.10 Enclosures for equipment
30 - 8.1.11 Degrees of protection of enclosed controllers and contactors
30 - 8.2 Performance requirements
30 - 8.2.1 Operating conditions
31 - 8.2.2 Temperature rise
31 - 8.2.3 Dielectric properties
32 - 8.2.4 Normal load and overload performance requirements
38 - 8.2.5 Coordination with short-circuit protective devices
39 - 8.2.6 Switching overvoltages
39 - 8.3 EMC requirements
39 - 8.3.1 General
39 - 8.3.2 Emission
40 - 8.3.3 Immunity
42 - 9 Tests
42 - 9.1 Kinds of tests
42 - 9.1.1 General
42 - 9.1.2 Type tests
42 - 9.1.3 Routine tests
42 - 9.1.4 Sampling tests
43 - 9.1.5 Special tests
43 - 9.2 Compliance with constructional requirements
43 - 9.3 Compliance with performance requirements
43 - 9.3.1 Test sequences
44 - 9.3.2 General test conditions
44 - 9.3.3 Performance under no load, normal load and overload conditions
50 - 9.3.4 Performance under short-circuit conditions
53 - 9.3.5 EMC tests
56 - 9.3.6 Routine and sampling tests
57 - 9.4 Special tests
57 - 9.4.1 Vacant
58 - ANNEX A - Marking and identification of terminals
58 - A.1 General
58 - A.2 Marking and identification of terminals of controller and contactors
61 - ANNEX B - Typical service conditions for controllers and contactors
61 - B.1 Control of resistive heating elements
61 - B.2 Switching of electric discharge lamp controls
61 - B.3 Switching of incandescent lamps
62 - B.4 Switching of transformers
62 - B.5 Switching of capacitor banks
63 - ANNEX C - Vacant
64 - ANNEX D - Requirements for radiated emission testing
64 - D.1 Characteristics of controllers and contactors
64 - D.2 Radiated emissions
66 - ANNEX E - Method of converting CISPR 11 radiated emission limits to transmitted power equivalents
67 - ANNEX F - Operating capability
70 - ANNEX G - Examples of control-circuit configurations
70 - G.1 External control device (ECD)
70 - G.2 Control-circuit configurations
72 - ANNEX H - Items subject to agreement between manufacturer and user

Applies to a.c. semiconductor non-motor load controllers and contactors intended for performing electrical operations by changing the state of a.c. electric circuits between the ON-state and the OFF-state. They may include a series mechanical switching device and are intended to be connected to circuits, the rated voltage of which does not exceed 1000 volt a.c. This Standard is identical with and reproduced from IEC 60947-4-3:1999.

This part of IEC 60947 applies to a.c. semiconductor non-motor load controllers and contactors intended for performing electrical operations by changing the state of a.c. electric circuits between the ON-state and the OFF-state. Typical applications are given in table 2.As controllers, they may be used to reduce the amplitude of the r.m.s. a.c. voltage on the load terminals from that of the applied voltage – either continuously or for a specified period of time. The half-wave period of the a.c. wave form remains unchanged from that of the applied voltage.They may include a series mechanical switching device and are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c.The semiconductor controllers and contactors dealt with in this standard are not normally intended 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 itself.In this context, this standard gives requirements for semiconductor controllers and contactors associated with separate short-circuit protective devices.This standard does not apply to- continuous operation of a.c. motors;- low-voltage a.c. semiconductor motor controllers and starters covered by IEC 60947-4-2; - electronic a.c. power controllers covered by IEC 60146; - all-or-nothing solid-state relays.Contactors and control-circuit devices used in semiconductor controllers and contactors 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 statea) the characteristics of semiconductor controllers and contactors and associated equipment;b) the conditions with which semiconductor controllers and contactors should comply with reference to- their operation and behaviour;- their dielectric properties;- the degrees of protection provided by their enclosures, where applicable;- their construction;c) the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests;d) the information to be given with the equipment or in the manufacturer's literature.

First published as AS C63-1965.
Revised and redesignated as AS 1029-1971.
Second edition 1974.
Revised and redesignated in part as AS 1029.2-1982.
Jointly revised and redesignated as AS/NZS 3947.4.3:2000.