IEC 60947-1 is the standard which lays the rules applicable to low voltage switchgear and controlgear.
The purpose of this standard is to coordinate the rules and regulations in order to obtain uniformity of
requirements and tests. The product standard forming the series of IEC standard covering low voltage
switchgear and control gear are:
Sl.No
1
Standrad
IEC 60947-1
IEC 60947-2
2
IEC 60947-3
3
4
6
8
IEC 60947-4
IEC 60947-5
IEC 60947-6
IEC 60947-7
9
IEC 60947-8
title
Low voltage switchgear and control gear
Circuit Breaker
Switches, disconnectors, switch-disconnectors and fuse-combination
units
Contactors and motor starter
Control circuit devices and switching elements
Multiple function equipment
Ancillary equipment
Control units for build in thermal protection (PTC) for rotating electric
machine.
this standard concerns, when required by the relevant product standard, to switchgear and controlgear
herein after referred to as “equipment” and intended to be connected to circuits, the rated voltage of
which does not exceed 1000 V a.c. or 1500 V d.c.
It does not relate to low-voltage switchgear and controlgear assemblies which are dealt with in IEC
60439.
List of test performed for this standard are:
Type tests :
1. Constructional
Requirements
2. Temperature rise test
3. Dielectric properties
4. Making and breaking
capacities
5. Short circuit making and
breaking capacities
6. Operating limits
7. Operating performance
8. Degree of protection of
enclosed equipment
9. Test for EMC
Routine Tests
Sampling tests
1. Functional tests
1. Functional tests
2. Dielectric tests
2. Dielectric tests