AS 61869.1:2021 pdf Instrument transformers
1 Scope
This International Standard is applicable to newly manufactured instrument transformers with analogue or digital output for use with electrical measuring instruments or electrical protective devices having rated frequencies from 1 5 Hz to 1 00 Hz. This standard is a product family standard and covers general requirements only. For each kind of instrument transformer the product standard is composed by this standard and the relevant specific standard.
2 Normative references
The following referenced documents are essential for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60060-1 : High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60068-2-1 1 : Basic environmental testing procedures – Part 2: Tests – Test Ka: Salt mist
IEC 60068-2-1 7: Basic environmental testing procedures – Part 2: Tests – Test Q: Sealing
IEC 60068-2-75: Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests.
IEC 60071 -1 : Insulation co-ordination – Part 1: Definitions, principles and rules
IEC 60085: Electrical insulation – Thermal classification
IEC 60270: High-voltage test techniques – Partial discharge measurements
IEC 60296: Fluids for electrotechnical applications – Unused mineral insulating oils for
transformers and switchgear
IEC 60376: Specification of technical grade sulfur hexafluoride (SF 6 ) for use in electrical
equipment
IEC 6041 7: Graphical symbols for use on equipment
IEC 60455 (all parts): Resin based reactive compounds used for electrical insulation
IEC 60480: Guidelines for the checking and treatment of sulphur hexafluoride (SF 6 ) taken
from electrical equipment and specification for its re-use
IEC 60529: Degrees of protection provided by enclosures (IP code)
IEC 60567: Oil-filled electrical equipment – Sampling of gases and of oil for analysis of free
and dissolved gases – Guidance
IEC 60694: Common specifications for high-voltage switchgear and controlgear standards
IEC 60695-1 -1 : Fire hazard testing – Part 1-1: Guidance for assessing the fire hazard of
electrotechnical products – General guidelines
IEC 60695-1 -30: Fire hazard testing – Part 1-30: Guidance for assessing the fire hazard of
electrotechnical products – Use of preselection testing procedures
IEC 60695-7-1 : Fire hazard testing – Part 7-1: Toxicity of fire effluent – General guidance
IEC 60721 -3-3: Classification of environmental conditions – Part 3-3: Classification of groups
of environmental parameters and their severities – Stationary use of weatherprotected
locations
IEC 60721 -3-4: Classification of environmental conditions – Part 3: Classification of groups of
environmental parameters and their severities – Section 4: Stationary use at non-
weatherprotected locations
IEC 6081 5, Guide for the selection of insulators in respect of polluted conditions
IEC 60867: Insulating liquids – Specifications for unused liquids based on synthetic aromatic
hydrocarbons
IEC 61 462: Composite hollow insulators – Pressurized and unpressurized insulators for use in
electrical equipment with rated voltage greater that 1 000 V – Definitions, test methods and
acceptance criteria and design recommendations
IEC 61 634: High-voltage switchgear and controlgear – Use and handling of sulphur
hexafluoride (SF 6 ) in high-voltage switchgear and controlgear
IEC 621 55: Hollow pressurized and unpressurized ceramic and glass insulators for use in
electrical equipment with rated voltages greater than 1 000 V
IEC 62262: Degree of protection IK code
IEC 62271 -2: High-voltage switchgear and controlgear – Part 2: Seismic qualification for rated
voltages of 72,5 kV and above.
IEC 62271 -203: High-voltage switchgear and controlgear – Part 203: Gas-insulated metal-
enclosed switchgear for rated voltages above 52 kV
CISPR 1 8-2: Radio interference characteristics of overhead power lines and high-voltage
equipment – Part 2: Methods of measurement and procedure for determining limits
IEC Guide 1 09: Environmental aspects – Inclusion in electrotechnical product standards
ISO 3231 : Paints and varnishes – Determination of resistance to humid atmospheres
containing sulphur dioxide
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General definitions
3.1.1 instrument transformer
transformer intended to transmit an information signal to measuring instruments, meters and
protective or control devices or similar apparatus
[IEV 321 -01 -01 , modified]
3.1.2 enclosure
housing affording the type and degree of protection suitable for the intended application
[IEV 826-1 2-20]
3.1.3 primary terminals
terminals to which the voltage or current to be transformed is applied
3.1.4 secondary terminals
terminals which transmit an information signal to measuring instruments, meters and
protective or control devices or similar apparatus
3.1.5 secondary circuit
the external circuit receiving the information signals supplied by the secondary terminals of an
instrument transformer
[IEV 321 -01 -08, modified]
AS 61869.1:2021 pdf Instrument transformers
