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BS EN 60947-5-1:2017

BS EN 60947-5-1:2017

$215.11

Low-voltage switchgear and controlgear – Control circuit devices and switching elements. Electromechanical control circuit devices

Published By Publication Date Number of Pages
BSI 2017 116
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This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, 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 a frequency not exceeding 1 000 Hz) or 600 V d.c.

However, for operational voltages below 100 V a.c. or d.c., see 4.3.2.2.

This standard applies to specific types of control circuit devices such as:

  • manual control switches, for example push-buttons, rotary switches, foot switches, etc.;

  • electromagnetically operated control switches, either time-delayed or instantaneous, for example 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 or mechanism;

  • 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) indicator light(s).

NOTE 2 A control switch includes (a) switching element(s) and an actuating system.

NOTE 3 A switching element can be a contact element or a semiconductor element.

It also applies to specific types of switching elements associated with other devices (whose main circuits are covered by other standards) such as:

  • auxiliary contacts of a switching device (e.g. contactor, circuit breaker. etc.) which are not dedicated 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 also comply with the requirements and tests of IEC 60947-4-1 except for the utilization category which comply with this standard.

This standard does not include the relays covered in IEC 60255 or in the IEC 61810 series, nor automatic electrical control devices for household and similar purposes.

The colour requirements of indicator lights, push-buttons, etc., are found in IEC 60073 and also in CIE S 0004/E-2001 from the Commission of Illumination (CIE)

The object of this standard is to state:

  1. the characteristics of control circuit devices;

  2. 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;

  3. 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.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 English
CONTENTS
18 FOREWORD
20 1 General
1.1 Scope and object
21 1.2 Normative references
23 2 Terms and definitions
25 2.1 Basic terms and definitions
26 2.2 Control switches
29 2.3 Parts of control switches
31 2.4 Operation of control switches
2.4.1 Operation of contactor relays
2.4.2 Operation of pilot switches
32 2.4.3 Operation of rotary switches
33 2.4.4 Operation of mechanically operated control switches
34 3 Classification
3.1 Contact elements
3.2 Control switches
3.3 Control circuit devices
3.4 Time delay switching elements
3.5 Control switch mounting
4 Characteristics
4.1 Summary of characteristics
4.1.1 General
35 4.1.2 Operation of a control switch
4.2 Type of control circuit device or switching element
4.2.1 Kind of control circuit device
4.2.2 Kind of switching elements
4.2.3 Number of poles
4.2.4 Kind of current
36 4.2.5 Interrupting medium
4.2.6 Operating conditions
4.3 Rated and limiting values for switching elements
4.3.1 General
4.3.2 Rated voltages (of a switching element)
37 4.3.3 Currents
4.3.4 Rated frequency
4.3.5 Vacant
4.3.6 Normal and abnormal load characteristics
4.3.7 Shortcircuit characteristics
4.4 Utilization categories for switching elements
38 4.5 Vacant
4.6 Vacant
4.7 Vacant
4.8 Vacant
4.9 Vacant
4.10 Electrically separated contact elements
4.11 Actuating quantities for pilot switches
4.12 Pilot switches having two or more contact elements
5 Product information
5.1 Nature of information
Tables
Table 1 – Utilization categories for switching elements
39 5.2 Marking
5.2.1 General
5.2.2 Terminal identification and marking
40 5.2.3 Functional markings
5.2.4 Emergency stop
5.2.5 Operating diagram
5.2.6 Time delay markings
5.3 Instructions for installation, operation and maintenance
41 5.4 Additional information
6 Normal service, mounting and transport conditions
6.3.1 Mounting of single hole mounted devices
Table 2 – Mounting hole diameter and dimensions of the key recess (if any)
42 7 Constructional and performance requirements
7.1 Constructional requirements
7.1.1 General
7.1.2 Materials
Table 3 – Preferred minimum distances between centres of mounting holes
43 7.1.3 Current-carrying parts and their connections
7.1.4 Clearances and creepage distances
44 7.1.7 Conditions for control switches suitable for isolation
7.1.8 Terminals
7.1.14 Class II control circuit devices
7.1.15 Requirements for control devices with integrally connected cables
7.2 Performance requirements
7.2.3 Dielectric properties
7.2.4 Ability to make and break under normal and abnormal load conditions
45 7.2.5 Conditional short-circuit current
7.2.6 Vacant
7.2.7 Additional requirements for control switches suitable for isolation
7.2.8 Maximum recovery time
7.3 Electromagnetic compatibility (EMC)
7.3.1 General
46 7.3.2 Immunity
47 7.3.3 Emission
48 Table 4 – Verification of making and breaking capacities of switching elements under normal conditions corresponding to the utilization categories
49 Table 5 – Verification of making and breaking capacities of switching elements under abnormal conditions corresponding to the utilization categories
Table 6 – Test conditions for glow-wire test
50 Table 7 – Acceptance criteria
51 Table 8 – Immunity tests
52 8 Tests
8.1 Kinds of test
8.1.1 General
8.1.2 Type tests
8.1.3 Routine tests
53 8.1.4 Sampling tests
8.1.5 Special tests
8.2 Compliance with constructional requirements
8.2.1 Materials
8.2.2 Equipment
54 8.2.3 Enclosures for equipment
8.2.4 Mechanical and electrical properties of terminals
55 8.2.5 Verification of actuating force (or moment)
8.2.6 Verification of limitation of rotation (of a rotary switch)
8.2.7 Conduit pull-out test, torque test and bending test with metallic conduits
8.3 Performance
8.3.1 Test sequences
56 8.3.2 General test conditions
57 8.3.3 Performance under no-load, normal load and abnormal load conditions
60 8.3.4 Performance under conditional short-circuit current
61 8.4 Tests for EMC
8.4.1 General
8.4.2 Immunity
62 8.4.3 Emission
8.4.4 Test results and test report
63 Table 9 – Test values for electrical performance and ageing test of screwless-type clamping units
64 Figures
Figure 1 – Examples of the recommended method for drawing an operating diagram of a rotary switch
65 Figure 2 – Operation of push-buttons
Figure 3 – Difference e between the over-travel of the actuator and that of the contact element
66 Figure 4 – Examples of contact elements (schematic sketches)
67 Figure 5 – Test circuits for multi-pole control switches – Contacts of same polarity, not electrically separated
Figure 6 – Test circuits for multi-pole control switches – Contacts of opposite polarity, and electrically separated
68 Figure 7 – Load Ld details for test conditions requiring different values of make and break current and/or power factor (time constant)
Figure 8 – Test circuit, conditional short-circuit current (see 8.3.4.2)
69 Figure 9 – Current/time limits for d.c. test loads (see 8.3.3.5.4)
Figure 10 – Voltage drop measurement at contactpoint of the clamping unit or terminal
70 Annexes
Annex A (normative) Electrical ratings based on utilization categories (see 3.1)
Table A.1 – Examples of contact rating designation based on utilization categories
71 Table A.2 – Examples of semiconductors switching element ratingsfor 50 Hz and/or 60 Hz 1)
Table A.3 – Examples of semiconductors switching element ratings for d.c. 1)
72 Annex B (normative) Example of inductive test loads for d.c. contacts
B.1 General
B.2 Construction
73 Figure B.1 – Construction of load for d.c. contacts
Table B.1 – DC loads
74 Annex C (normative) Special tests – Durability tests
C.1 General
C.1.1 Durability declaration
C.1.2 Test procedures
75 C.1.3 Failure criteria
C.2 Mechanical durability
C.2.1 General
C.2.2 Test procedures
C.3 Electrical durability
C.3.1 General
C.3.2 Test procedures
76 Table C.1 – Making and breaking conditions for electrical durability
77 Figure C.1 – Normal circuit (see C.3.2.2)
Figure C.2 – Simplified circuit (see C.3.2.2)
78 Annex D Vacant
79 Annex E (normative) Items subject to agreement between manufacturer and user
80 Annex F (normative) Class II control circuit devices insulated by encapsulation Requirements and tests
F.1 General
F.2 Terms and definitions
F.5 Marking
81 F.7 Instructional and functional requirements
F.7.1 Choice of compound
F.7.2 Adhesion of the compound
F.7.3 Dielectric properties
F.8 Tests
F.8.1 Kind of tests
Figure F.1 – Insulation by encapsulation
82 Figure F.2 – Test apparatus
84 Annex G (normative) Additional requirements for control circuit devices with integrally connected cables
G.1 General
G.2 Terms and definitions
G.7 Constructional and performance requirements
G.7.1 Constructional requirements
85 G.7.2 Performance requirements
G.8 Tests
G.8.1 General
G.8.2 Type tests
86 G.8.3 Results to be obtained
87 Annex H (normative) Additional requirements for semiconductor switching elements for control circuit devices
H.1 General
H.2 Terms and definitions
H.3 Classification
H.3.1 Semiconductor switching elements
H.4 Characteristics
H.4.1 Rated voltage
88 H.4.2 Utilization categories
H.5 Product information
H.7 Constructional and performance requirements
H.7.1 Performance requirements
Figure H.1 – Relationship between Ue and UB
89 H.7.2 Ability to make under abnormal and normal conditions
H.7.3 Conditional short-circuit current
H.7.4 Electromagnetic compatibility (EMC)
H.8 Tests
H.8.1 Type tests
H.8.2 Voltage drop (Ud)
90 H.8.3 Minimum operational current (Im)
H.8.4 OFF-state current (Ir)
H.8.5 Making and breaking capacities
H.8.6 Performance under short-circuit current conditions
Figure H.2 – Example of test circuit for the verification of voltage drop, minimum operational current and OFF-state current (see H.8.2, H.8.3 and H.8.4)
91 H.8.7 Verification of electromagnetic compatibility
Figure H.3 – Short-circuit testing (see H.8.6.1)
93 Annex J (normative) Special requirements for indicator lights and indicating towers
J.1 General
J.2 Terms and definitions
J.3 Classification
94 J.4 Characteristics
J.4.1 Rated operational voltage of an indicator light
J.4.2 Rated thermal power of an indicator light
J.4.3 Rated values of the lamp
J.5 Product information
J.6 Normal service, mounting and transport conditions
95 J.7 Constructional and performance requirements
J.8 Tests
J.8.3 Tests for indicator lights and indicating towers
Figure J.1 – Mounting dimensions for indicating tower socket
96 Figure J.2 – Mounting dimensions for temperature rise tests
97 J.8.4 Shock and vibration
98 J.8.5 Degree of protection for indicating towers
99 Annex K (normative) Special requirements for control switches with direct opening action
K.1 General
K.2 Terms and definitions
K.3 Classification
100 K.4 Characteristics
K.4.4 Utilization categories for switching elements
K.5 Product information
K.5.2 Marking
K.5.4 Additional information
101 K.6 Normal service, mounting and transport conditions
K.7 Constructional and performance requirements
102 K.8 Tests
104 Figure K.1 – Verification of robustness of the actuating system
105 Annex L (normative) Special requirements for mechanically linked contact elements
L.1 General
L.2 Terms and definitions
L.3 Classification
L.4 Characteristics
L.5 Product information
106 L.6 Normal service, mounting and transport conditions
L.7 Constructional and performance requirements
L.8 Tests
Figure L.1 – Example of representation of NO and NC contacts which are mechanically linked and NC non-linked contact
Figure L.2 – Symbol for device containing mechanically linked contacts
107 L.8.4 Special test for mechanically linked contact elements
108 Annex M (normative) Terminal marking, distinctive number and distinctive letter for control circuit devices
M.1 Scope
M.2 Terminal marking rule
M.2.1 General
M.2.2 Function digit
M.2.3 Sequence digit
109 M.2.4 Numbering method
M.3 Distinctive number and distinctive letter
M.3.1 General
M.3.2 Distinctive number
M.3.3 Distinctive letter
M.4 Terminal numbering sequence
110 M.5 Contactor relays designated by the distinctive letter E
Table M.1 – Diagrams of control switches
111 Table M.2 – Diagrams of contactor relays designated by the distinctive letter E
112 M.6 Contactor relays designated by distinctive letters X, Y or Z
M.6.1 Contactor relays designated by the distinctive letter Z
M.6.2 Contactor relays designated by the distinctive letter X
M.6.3 Contactor relays designated by the distinctive letter Y
Table M.3 – Diagrams of contactor relays designated by the distinctive letter Y
113 Annex N (normative) Procedure to determine reliability data for electromechanical devices in control circuits used in functional safety applications
N.1 General
N.1.1 Overview
N.1.2 Scope and object
N.1.3 General requirements
N.2 Terms, definitions and symbols
N.3 Method based on durability test results
N.3.1 General method
N.3.2 Test requirements
114 N.3.3 Number of samples
N.3.4 Characterization of a failure mode
N.3.5 Weibull modelling
N.3.6 Useful life and upper limit of failure rate
N.3.7 Reliability data
N.4 Data information
N.5 Example
115 Bibliography

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BS EN 60947-5-1:2017
$215.11