AS/NZS 3947.7.1:2001

1 - AS/NZS 3947.7.1:2001 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - ANCILLARY EQUIPMENT-TERMINAL BLOCKS FOR COPPER CONDUCTORS
4 - PREFACE
6 - CONTENTS
7 - 1 General
7 - 1.1 Scope
7 - 1.2 Normative references
8 - 2 Definitions
8 - 2.1 terminal block
8 - 2.2 terminal assembly
8 - 3 Classification
8 - 4 Characteristics
8 - 4.1 Summary of characteristics
9 - 4.2 Type of terminal block
9 - 4.3 Rated and limiting values
9 - 4.3.1 Rated voltages
9 - 4.3.2 Short-time withstand current (of a terminal block)
9 - 4.3.3 Standard cross-sections
10 - 4.3.4 Rated cross-section
10 - 4.3.5 Rated connecting capacity (of a terminal block)
10 - 5 Product information
10 - 5.1 Markings
11 - 5.2 Additional information
11 - 6 Normal service, mounting and transport conditions
11 - 7 Constructional and performance requirements
11 - 7.1 Constructional requirements
11 - 7.1.1 Terminals
11 - 7.1.2 Mounting
11 - 7.1.3 Clearances and creepage distances
11 - 7.1.4 Terminal identification and marking
12 - 7.1.5 Resistance of parts in insulating material to abnormal heat, fire and tracking
12 - 7.1.6 Connecting capacity
12 - 7.2 Performance requirements
12 - 7.2.1 Temperature-rise
12 - 7.2.2 Dielectric properties
12 - 7.2.3 Rated short-time withstand current
12 - 7.2.4 Voltage drop
12 - 7.2.5 Electrical performance after ageing (for screwless type terminal blocks only)
12 - 7.3 Electromagnetic compatibility (EMC)
12 - 8 Tests
12 - 8.1 General
13 - 8.2 Verification of mechanical characteristics
13 - 8.2.1 Attachment of the terminal block on its support
14 - 8.2.2 Mechanical properties of terminals of a terminal block
15 - 8.3 Verification of electrical characteristics
15 - 8.3.1 Dielectric test
16 - 8.3.2 Verification of the voltage drop
18 - 8.3.3 Temperature-rise test
18 - 8.3.4 Short-time withstand current test
19 - 8.3.5 Ageing test for screwless type terminal blocks
19 - 8.4 EMC tests
20 - Annex A - Clearances and creepage distances
20 - A.1 General
20 - A.2 Determination of clearances and creepage distances
21 - Annex B - Items subject to agreement between manufacturer and user

Specifies terminal blocks with screw-type or screwless type terminals primarily intended for industrial or similar use, and to be fixed to a support to provide electrical and mechanical connection between copper conductors intended to be used in circuits rated up to 1000 volt a.c. up to 1000 Hz and up to 1500 volt d.c. This Standard is identical to and has been reproduced from IEC 60947-7-1:1989 and Amendment 1:1999.

This standard specifies requirements for terminal blocks with screw-type or screwless type terminals primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,2 mm2 and 300 mm2 (AWG 24/600 MCM), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c.It does not apply to terminal blocks or connecting devices forming an integral part of equipment which are dealt with in the relevant product standards.This standard does not apply to: connecting devices requiring the fixing of special devices to the conductors before clamping them into the terminal, for example flat push-on connectors; connecting devices requiring twisting of the conductors, for example those with twisted joints; connecting devices providing direct contact to the conductors by means of edges or points penetrating the insulation, which are dealt with in other product standards.NOTE This standard may be used as a guide for special types of terminal blocks (e.g. disconnecting terminal blocks) when appropriate specifications are not available.

First published as AS 3947.7.1-1996.
Jointly revised and designated AS/NZS 3947.7.1:2001.