FOREWORD
1 General
1.1 Scope
1.2 Normative references
1.3 Terms, definitions, abbreviations and symbols
1.4 Preferred values
1.4.1 Frequency of operation
1.4.2 Duty cycle
1.4.3 Open-circuit voltage across contacts
1.4.4 Current ratings
1.4.5 Load ratings
1.4.6 Number of operations
1.4.7 Climatic category
1.4.8 Preferred environmental severities
1.4.9 Rated operational voltage; U[e]
1.4.10 Rated switching current; I[e]
1.4.11 Rated insulation voltage
1.4.12 Rated impulse voltage
1.4.13 Utilization categories
1.4.14 Contact reliability
1.4.15 Limiting continuous current; I[th]
1.5 Marking
1.6 Order of precedence
1.7 Precautions regarding mercury (for mercury wetted
contact units)
2 Quality assessment procedures
2.1 General
2.2 Self-certification
2.3 Two-party certification
2.4 Third-party certification
3 Test and measurement procedures
3.1 General
3.2 Alternative procedures
3.3 Standard conditions for testing
3.4 Visual inspection and check of dimensions
3.5 Functional tests
3.6 Remanence test
3.7 Contact circuit resistance
3.8 Dielectric test
3.9 Insulation resistance
3.10 Operate, release, transfer or bridging, and bounce
times
3.11 Contact sticking
3.12 Robustness of terminals
3.13 Soldering (solderability and resistance to soldering
heat)
3.14 Climatic sequence
3.15 Damp heat, steady state
3.16 Rapid change of temperature
3.17 Salt mist
3.18 Bump
3.19 Vibration
3.20 Shock
3.21 Acceleration test - Functional test only
3.22 Sealing
3.23 Electrical endurance
3.23.1 General
3.23.2 Types of electrical endurance test
3.23.3 Standard electrical endurance test
3.23.4 Application simulation endurance test
3.23.5 Requirements
3.23.6 Information to be stated in the detail
specification
3.24 Mechanical endurance
3.25 Maximum cycling frequency
3.26 Mounting position test (for mercury wetted contact
units)
3.27 Drain time test (for mercury wetted contact units)
3.28 Voltage surge test
3.29 Rated impulse voltage
3.29.1 Procedure
3.29.2 Requirements
3.29.3 Information to be stated in the detail
specification
3.30 Rated making and breaking capacities
3.30.1 General test arrangements
3.30.2 Procedure
3.30.3 Requirements
3.30.4 Information to be stated in the detail
specification
3.31 Rated conditional short-circuit current
3.31.1 General test arrangements
3.31.2 Procedure
3.31.3 Requirements
3.31.4 Information to be stated in the detail
specification
3.32 Contact reliability test
3.32.1 General test arrangements
3.32.2 Procedure
3.32.3 Requirements
3.32.4 Information to be stated in the detail
specification
3.33 Temperature rise
3.33.1 Procedure
3.33.2 Requirements
3.33.3 Information to be stated in the detail
specification
3.34 Making current capacity test
3.34.1 General
3.34.2 Procedure
3.34.3 Requirements
3.34.4 Information to be stated in the detail
specification
3.35 Breaking current capacity test
3.35.1 General
3.35.2 Procedure
3.35.3 Requirements
3.35.4 Information to be stated in the detail
specification
Annex A (informative) - Electrical endurance test circuit
Annex B (informative) - Rated conditional short-circuit current
test circuit
Annex C (informative) - Electrical ratings based on utilization
categories
Annex D (informative) - Example of test arrangement for contact
reliability test
Annex E (informative) - Standard test coils for heavy-duty reed
switches
Annex F (informative) - Making current capacity test sequence
Annex G (informative) - Breaking current capacity test sequence
Bibliography