IEC 60255-1:1967

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Environmental conditions
   4.1 General
   4.2 Normal environmental conditions
   4.3 Special environmental conditions
   4.4 Storage conditions
5 Ratings
   5.1 General
   5.2 Rated voltage
        5.2.1 Input energizing voltage
        5.2.2 Auxiliary energizing voltage
        5.2.3 Rated insulation voltage
   5.3 Rated current
        5.3.1 Input energizing current
        5.3.2 Auxiliary energizing current
   5.4 Binary input and output
        5.4.1 Binary input
        5.4.2 Binary output
   5.5 Transducer analogue input and output
        5.5.1 Transducer analogue input
        5.5.2 Transducer analogue output
   5.6 Frequency
        5.6.1 Rated frequency
        5.6.2 Frequency operating range
   5.7 Rated burden
   5.8 Rated ambient temperature
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 dynamic system conditions
        6.5.5 Performance under transient signal conditions
        6.5.6 Multifunctional protection relay
        6.5.7 Programmable logic
   6.6 Communication protocols
   6.7 Binary input and output
        6.7.1 Binary input
        6.7.2 Binary output
   6.8 Transducer analogue input and output
        6.8.1 Transducer analogue input
        6.8.2 Transducer analogue output
   6.9 Input circuit for energizing quantities
        6.9.1 Characteristic energizing quantity
        6.9.2 Auxiliary energizing quantity
   6.10 Burden tests
        6.10.1 Burden for voltage transformers
        6.10.2 Burden for current transformers
        6.10.3 Burden for AC power supply
        6.10.4 Burden for DC power supply
        6.10.5 Burden for binary input
   6.11 Contact performance
   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
   6.14 Pollution
   6.15 Electromagnetic compatibility (EMC)
7 Tests
   7.1 General
   7.2 Test reference conditions
   7.3 Test overview
   7.4 Type test report content
8 Marking, labelling and packaging
9 Rules for transport, storage, installation, operation and
   maintenance
10 Product documentation
Annex A (informative) Type testing guidelines
Annex B (informative) Intrinsic, operating and overall system
        accuracy
Annex C (informative) Guidance on dependability
Bibliography

Describes common rules and requirements applicable to measuring relays and protection equipment including any combination of devices to form schemes for power system protection such as control, monitoring and process interface equipment in order to obtain uniformity of requirements and tests.