AS/NZS 60255.1:2025
Measuring relays and protection equipment – Part 1: Common requirements
The objective of this document is to specify common rules and requirements applicable to measuring relays and protection equipment, including any combination of equipment to form a distributed protection scheme for power system protection such as control, monitoring and process interface equipment, to obtain uniformity of requirements and tests. This document covers the main technologies in use today. Other emerging technologies present specific EMC and safety issues but the philosophy in this document will be applied.
This document is an adoption with national modifications, and has been reproduced from, IEC 60255‑1:2022 Measuring relays and protection equipment – Part 1: Common requirements.
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AS/NZS 60255.1:2025 Measuring relays and protection equipment Common requirements (IEC 60255-1:2022 (ED. 2.0) MOD)
Preface
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Environmental conditions
4.1 General
4.2 Normal environmental conditions
4.3 Special environmental conditions
4.4 Environmental storage conditions
4.5 Transport conditions
5 Ratings
5.1 General
5.2 Rated voltage
5.2.1 Input energizing voltage
5.2.2 Auxiliary power supply port energizing voltage
5.2.3 Rated insulation voltage
5.3 Rated current – Input energizing current
5.3.1 Primary relay
5.3.2 Secondary relay
5.4 Binary input and output port
5.4.1 Binary input port
5.4.2 Binary output port
5.5 Transducer analogue input and output port
5.5.1 Transducer analogue input port
5.5.2 Transducer analogue output port
5.6 Frequency
5.6.1 Rated frequency
5.6.2 Frequency operating range
5.7 Rated burden
5.8 Rated ambient temperature range
6 Design and construction
6.1 Marking
6.2 Dimensions
6.3 Enclosure protection
6.4 Product safety requirements
6.5 Functional performance requirements
6.5.1 General
6.5.2 Intrinsic accuracy
6.5.3 Operating accuracy
6.5.4 Performance under system conditions
6.5.5 Performance of multifunctional protection equipment
6.5.6 Internal user programmable logic
6.6 Communication protocols
6.7 Cybersecurity
6.8 Binary input and output port
6.8.1 Binary input port
6.8.2 Binary output port
6.9 Transducer analogue input and output port
6.9.1 Transducer analogue input port
6.9.2 Transducer analogue output port
6.10 Input circuit for measurement quantities
6.10.1 Analogue voltage port
6.10.2 Analogue current port
6.10.3 Communication port
6.11 Binary output performance (mechanical and static)
6.12 Climatic performance
6.12.1 General
6.12.2 Verification procedure
6.12.3 Climatic environmental tests
6.13 Mechanical requirements
6.13.1 Vibration response and endurance (sinusoidal)
6.13.2 Shock response, shock withstand and bump
6.13.3 Seismic risk
6.14 Pollution
6.15 Electromagnetic compatibility (EMC)
7 Tests
7.1 Test reference conditions
7.2 Test overview
7.3 Burden measurements
7.3.1 Burden for analogue voltage inputs
7.3.2 Burden for analogue current inputs
7.3.3 Burden for AC power supply
7.3.4 Burden for DC power supply
7.3.5 Burden for binary input
7.4 Type test report content
8 Marking, labelling and packaging
9 Product documentation and technical data
Annex A (normative) Type testing guidelines
Annex B (informative) Environmental operating locations
Bibliography
Figure 1 — Ports for measuring relays and protection equipment
Figure 2 — Binary output parameters
Figure A.1 — Settings selection criteria
Table 1 — Normal environmental conditions
Table 2 — Contact performance requirements
Table 3 — Hot and cold temperatures
Table 4 — Dry heat test – Operational
Table 5 — Cold test – Operational
Table 6 — Dry heat test, storage temperature
Table 7 — Cold test, storage temperature
Table 8 — Change of temperature test
Table 9 — Damp heat steady state test
Table 10 — Cyclic temperature with humidity test
Table 11 — Test reference conditions
Table 12 — Test overview
Table B.1 — Operating locations
Table B.2 — Climatic conditions
Table B.3 — Mechanical conditions
Table B.4 — EMC conditions
Table B.5 — Chemically active substance conditions
Table B.6 — Mechanically active substance conditions
Table B.7 — Biological conditions
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References
Measuring relays and protection equipment – Part 26: Electromagnetic compatibility requirements
Measuring relays and protection equipment – Part 27: Product safety requirements
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AS/NZS 60255.1:2025 Measuring relays and protection equipment Common requirements (IEC 60255-1:2022 (ED. 2.0) MOD)
Preface
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Environmental conditions
4.1 General
4.2 Normal environmental conditions
4.3 Special environmental conditions
4.4 Environmental storage conditions
4.5 Transport conditions
5 Ratings
5.1 General
5.2 Rated voltage
5.2.1 Input energizing voltage
5.2.2 Auxiliary power supply port energizing voltage
5.2.3 Rated insulation voltage
5.3 Rated current – Input energizing current
5.3.1 Primary relay
5.3.2 Secondary relay
5.4 Binary input and output port
5.4.1 Binary input port
5.4.2 Binary output port
5.5 Transducer analogue input and output port
5.5.1 Transducer analogue input port
5.5.2 Transducer analogue output port
5.6 Frequency
5.6.1 Rated frequency
5.6.2 Frequency operating range
5.7 Rated burden
5.8 Rated ambient temperature range
6 Design and construction
6.1 Marking
6.2 Dimensions
6.3 Enclosure protection
6.4 Product safety requirements
6.5 Functional performance requirements
6.5.1 General
6.5.2 Intrinsic accuracy
6.5.3 Operating accuracy
6.5.4 Performance under system conditions
6.5.5 Performance of multifunctional protection equipment
6.5.6 Internal user programmable logic
6.6 Communication protocols
6.7 Cybersecurity
6.8 Binary input and output port
6.8.1 Binary input port
6.8.2 Binary output port
6.9 Transducer analogue input and output port
6.9.1 Transducer analogue input port
6.9.2 Transducer analogue output port
6.10 Input circuit for measurement quantities
6.10.1 Analogue voltage port
6.10.2 Analogue current port
6.10.3 Communication port
6.11 Binary output performance (mechanical and static)
6.12 Climatic performance
6.12.1 General
6.12.2 Verification procedure
6.12.3 Climatic environmental tests
6.13 Mechanical requirements
6.13.1 Vibration response and endurance (sinusoidal)
6.13.2 Shock response, shock withstand and bump
6.13.3 Seismic risk
6.14 Pollution
6.15 Electromagnetic compatibility (EMC)
7 Tests
7.1 Test reference conditions
7.2 Test overview
7.3 Burden measurements
7.3.1 Burden for analogue voltage inputs
7.3.2 Burden for analogue current inputs
7.3.3 Burden for AC power supply
7.3.4 Burden for DC power supply
7.3.5 Burden for binary input
7.4 Type test report content
8 Marking, labelling and packaging
9 Product documentation and technical data
Annex A (normative) Type testing guidelines
Annex B (informative) Environmental operating locations
Bibliography
Figure 1 — Ports for measuring relays and protection equipment
Figure 2 — Binary output parameters
Figure A.1 — Settings selection criteria
Table 1 — Normal environmental conditions
Table 2 — Contact performance requirements
Table 3 — Hot and cold temperatures
Table 4 — Dry heat test – Operational
Table 5 — Cold test – Operational
Table 6 — Dry heat test, storage temperature
Table 7 — Cold test, storage temperature
Table 8 — Change of temperature test
Table 9 — Damp heat steady state test
Table 10 — Cyclic temperature with humidity test
Table 11 — Test reference conditions
Table 12 — Test overview
Table B.1 — Operating locations
Table B.2 — Climatic conditions
Table B.3 — Mechanical conditions
Table B.4 — EMC conditions
Table B.5 — Chemically active substance conditions
Table B.6 — Mechanically active substance conditions
Table B.7 — Biological conditions
AS/NZS 60255.1:2025
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.