AS/NZS 3947.5.1:2000

1 - AS/NZS 3947.5.1:2000 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - CONTROL CIRCUIT DEVICES AND SWITCHING ELEMENTS - ELECTROMECH...
4 - PREFACE
6 - CONTENTS
9 - 1 General
9 - 1.1 Scope and object
10 - 1.2 Normative references
11 - 2 Definitions
14 - 2.1 Basic definitions
14 - 2.1.1 control circuit device
14 - 2.1.2 control switch (for control and auxiliary circuits)
14 - 2.1.3 control switch suitable for isolation
14 - 2.1.4 control station
14 - 2.2 Control switches
14 - 2.2.1 automatic control switches
15 - 2.2.2 manually operated control switches
17 - 2.3 Parts of control switches
17 - 2.3.1 switching element
17 - 2.3.2 semiconductor element
17 - 2.3.3 contact element (of a control switch)
18 - 2.3.4 button
19 - 2.3.5 locating mechanism (of a rotary switch)
19 - 2.3.6 end stop
19 - 2.4 Operation of control switches
19 - 2.4.1 Operation of contactor relays
19 - 2.4.2 Operation of pilot switches
20 - 2.4.3 Operation of rotary switches
21 - 3 Classification
21 - 3.1 Contact elements
22 - 3.2 Control switches
22 - 3.3 Control circuit devices
22 - 3.4 Time delay switching elements
22 - 3.5 Control switch mounting
22 - 4 Characteristics
22 - 4.1 Summary of characteristics
22 - 4.1.1 Operation of a control switch
23 - 4.2 Type of control circuit device or switching element
23 - 4.2.1 Kind of control circuit device
23 - 4.2.2 Kind of switching elements
23 - 4.2.3 Number of poles
23 - 4.2.4 Kind of current
23 - 4.2.5 Interrupting medium
23 - 4.2.6 Operating conditions
24 - 4.3 Rated and limiting values for switching elements
24 - 4.3.1 Rated voltages (of a switching element)
24 - 4.3.2 Currents
24 - 4.3.3 Rated frequency
24 - 4.3.4 Vacant
24 - 4.3.5 Normal and abnormal load characteristics
25 - 4.3.6 Short- circuit characteristics
25 - 4.4 Utilization categories for switching elements
25 - 4.5 Vacant
25 - 4.6 Vacant
25 - 4.7 Vacant
25 - 4.8 Vacant
25 - 4.9 Switching overvoltages
25 - 4.10 Electrically separated contact elements
26 - 4.11 Actuating quantities for pilot switches
26 - 4.12 Pilot switches having two or more contact elements
26 - 5 Product information
26 - 5.1 Nature of information
27 - 5.2 Marking
27 - 5.2.1 General
27 - 5.2.2 Terminal identification and marking
27 - 5.2.3 Functional markings
27 - 5.2.4 Emergency stop
27 - 5.2.5 Operating diagram
27 - 5.2.6 Time delay markings
28 - 5.3 Instructions for installation, operation and maintenance
28 - 5.4 Additional information
28 - 6 Normal service, mounting and transport conditions
28 - 6.3.1 Mounting of single hole mounted devices
29 - 7 Constructional and performance requirements
29 - 7.1 Constructional requirements
29 - 7.1.1 Materials
29 - 7.1.2 Current-carrying parts and their connections
30 - 7.1.3 Clearances and creepage distances
30 - 7.1.6 Conditions for control switches suitable for isolation
30 - 7.1.7 Class II control circuit devices
30 - 7.1.8 Requirements for control devices with integrally connected cables
31 - 7.2 Performance requirements
31 - 7.2.3 Dielectric properties
31 - 7.2.4 Ability to make and break under normal and abnormal load conditions
31 - 7.2.5 Conditional short- circuit current
32 - 7.2.6 Switching overvoltage
32 - 7.2.7 Additional requirements for control switches suitable for isolation
33 - 8 Tests
33 - 8.1 Kinds of test
33 - 8.1.1 General
33 - 8.1.2 Type tests
34 - 8.1.3 Routine tests
34 - 8.1.4 Sampling tests
34 - 8.1.5 Special tests
34 - 8.2 Compliance with constructional requirements
34 - 8.2.5 Verification of actuating force (or moment)
34 - 8.2.6 Verification of limitation of rotation (of a rotary switch)
35 - 8.3 Performance
35 - 8.3.1 Test sequences
35 - 8.3.2 General test conditions
36 - 8.3.3 Performance under no- load, normal load and abnormal load conditions
39 - 8.3.4 Performance under conditional short- circuit current
48 - ANNEX A - Electrical ratings based on utilization categories (see 3.1)
50 - ANNEX B - Example of inductive test loads for d.c. contacts
50 - B. 1 General
50 - B. 2 Construction
52 - ANNEX C - Special tests – Durability tests
52 - C.1 General
53 - C.2 Mechanical durability
53 - C.3 Electrical durability
56 - ANNEX D - Clearances and creepage distances of control circuit devices
56 - D.1 Scope
56 - D.2 Definitions
56 - D.3 General
56 - D.4 Determination of clearances and creepage distances
57 - D.5 Minimum values of clearances and creepage distances
59 - ANNEX E - Items subject to agreement between manufacturer and user
60 - ANNEX F - Class II control circuit devices insulated by encapsulation - Requirements and tests
60 - F.1 General
60 - F.2 Definitions
60 - F.5 Marking
61 - F.7 Constructional and functional requirements
61 - F.8 Tests
64 - ANNEX G - Additional requirements for control circuit devices with integrally connected cables
64 - G.1 General
64 - G.2 Definitions
64 - G.7 Constructional and performance requirements
65 - G.8 Tests
66 - ANNEX H - Additional requirements for semiconductor switching elements for control circuit devices
66 - H.1 General
66 - H.2 Definitions
66 - H.3 Classification
66 - H.4 Characteristics
67 - H.5 Product information
67 - H.7 Constructional and performance requirements
70 - H.8 Tests
73 - ANNEX J - Special requirements for indicator lights
73 - J.1 General
73 - J.2 Definitions
73 - J.3 Classification
74 - J.4 Characteristics
74 - J.5 Product information
74 - J.6 Normal service, mounting and transport conditions
74 - J.7 Constructional and performance requirements
75 - J.8 Tests
78 - ANNEX K - Special requirements for control switches with direct opening action
78 - K.1 General
78 - K.2 Definitions
78 - K.3 Classification
79 - K.4 Characteristics
79 - K.5 Product information
80 - K.6 Normal service, mounting and transport conditions
80 - K.7 Constructional and performance requirements
81 - K.8 Tests
84 - ANNEX L - Special requirements for mechanically linked contact elements
84 - L.1 General
84 - L.2 Definition
84 - L.3 Classification
84 - L.4 Characteristics
85 - L.5 Product information
85 - L.6 Normal service, mounting and transport conditions
85 - L.7 Constructional and performance requirements
86 - L.8 Tests

Applies to control circuit devices and switching elements intended for controlling, signalling and interlocking of switchgear and controlgear having a rated voltage not exceeding 1000 volt a.c. (at a frequency not exceeding 1000 Hz) or 600 V d.c. Provides special requirements for indicator lights and control switches with positive opening operation. This Standard is identical with and reproduced from IEC 60947-5-1:1997 including the Amendment 1:1999 and Amendment 2:1999.

This part of IEC 60947 applies to control circuit devices and switching elements intended forcontrolling, signalling, interlocking, etc., of switchgear and controlgear.It applies to control circuit devices having a rated voltage not exceeding 1 000 V a.c. (at afrequency not exceeding 1 000 Hz) or 600 V d.c.However, for operational voltages below 100 V a.c. or d.c., see note 2 of 4.3.1.1.This standard applies to specific types of control circuit devices such as: manual control switches, for example pushbuttons, rotary switches, foot switches, etc.; electromagnetically operated control switches, either time-delayed or instantaneous, forexample contactor relays; pilot switches, for example pressure switches, temperature sensitive switches (thermostats),programmers, etc.; position switches, for example control switches operated by part of a machine ormechanism; associated control circuit equipment, for example indicator lights, etc.NOTE 1 A control circuit device includes (a) control switch(es) and associated devices such as (an) indicatorlight(s).NOTE 2 A control switch includes (a) switching element(s) and an actuating system.NOTE 3 A switching element may be a contact element or a semiconductor element.It also applies to specific types of switching elements associated with other devices (whosemain circuits are covered by other standards) such as: auxiliary contacts of a switching device (e.g. contactor, circuit breaker. etc.) which are notdedicated exclusively for use with the coil of that device; interlocking contacts of enclosure doors; control circuit contacts of rotary switches; control circuit contacts of overload relays.Contactor relays shall also meet the requirements and tests of IEC 60947-4-1 except for theutilization category which shall comply with this standard.This standard does not include the relays covered in IEC 60255 or automatic electrical controldevices for household and similar purposes.The colour requirements of indicator lights, pushbuttons, etc., are found in IEC 60073 and alsoin publication 2 of the International Commission of Illumination (CIE).The object of this standard is to state:a) The characteristics of control circuit devices.b) The electrical and mechanical requirements with respect to:1) The various duties to be performed.2) The significance of the rated characteristics and of the markings.3) The tests to verify the rated characteristics.c) The functional requirements to be satisfied by the control circuit devices with respect to:1) Environmental conditions, including those of enclosed equipment.2) Dielectric properties.3) Terminals.

First published as part of AS 1431.1-1974, AS 1431.2-1977 and AS 1431.7-1989.
Second edition AS 1431.1-1983.
Third edition 1989.
Second edition AS 1431.2-1989.
AS 1431.1-1989, AS 1431.2-1989 and AS 1431.7-1989 revised and redesignated as AS 3947.5.1-1995.
Jointly revised and designated as AS/NZS 3947.5.1:2000.