Technical Committee on Industrial Products
Subcommittee on C22.2 No.5
Preface
Foreword
1 Scope
2 Definitions
3 General Requirements
4 Constructing
4.1 General
4.2 Enclosures
4.3 Bases
4.4 Current-Carrying Parts
4.5 Wiring Terminals
4.6 Operating Mechanism
4.7 Trip Mechanism
4.8 Spacings
5 Marking
6 Tests
6.1 Test Schedules
6.2 Selection of Samples
6.3 Calibration
6.3.1 Conditions
6.3.2 200 Per Cent
6.3.3 135 per Cent
6.3.4 100 Per Cent
6.3.5 Instantaneous
6.4 Overload
6.4.1 Conditions
6.4.2 Test
6.5 Temperature and 100% Calibration
6.5.1 General
6.5.2 Conditions
6.5.3 Test
6.5.4 Conditions - 100% Continuous Operation
6.5.5 Test - Continuous Operation, 100% Rating
6.6 Endurance
6.6.1 Conditions
6.6.2 Test
6.7 Calibration Repeated
6.8 Rupturing Capacity
6.8.1 Conditions
6.8.2 Test
6.9 Calibration Repeated
6.10 Dielectric Strength
6.11 Switching Duty
6.12 High Interrupting Ratings
6.12.1 General
6.12.2 Calibration
6.12.3 Short-Circuit Interruption
6.12.4 Circuit Characteristics
6.12.5 Trip-Out
6.12.6 Dielectric Strength
6.13 Interrupting Ratings of Breakers in Series
6.13.1 General
6.13.2 Short-Circuit Interruption
6.13.3 Intermediate Interruption
6.14 Current-Limiting Breakers
6.14.1 General
6.14.2 Calibration
6.14.3 Short-Circuit Interruption and Let-Through
Measurement
6.14.4 Trip-Out
6.14.5 Dielectric Strength
7 Adjustable Breakers
7.1 General
7.2 Test
7.3 Current-Trip Adjustment Type and Changeable
Ampere Type Breakers with Integral (System)
Ground-Fault Protection
7.3.1 General
7.3.2 Internal Wiring
7.3.3 Supply Connections
7.3.4 Test Circuits
7.3.5 Spacings
7.3.6 Tests
8 Breaker accessories
8.1 Scope
8.2 Definitions
8.3 General requirements
8.4 Construction
8.4.1 Components
8.4.2 Installation
8.4.3 Mounting
8.4.4 Field Wiring
8.4.5 Strain Relief
8.4.6 Spacings
8.4.7 Performance
8.5 Marking
8.6 Tests
8.6.1 Performance
8.6.2 Alarm and Auxiliary Switches
8.6.3 Shunt-Trip Devices
8.6.4 Undervoltage-Trip Devices
8.6.5 Overvoltage-Trip Devices
8.6.6 Electrical Operators
9 Fused Breakers and high-Fault Protectors
9.1 Scope
9.2 Definition
9.3 Construction
9.4 Tests
10 Instantaneous-Trip Circuit Breakers
10.1 Scope
10.4 Construction
10.6 Tests
10.6.1 General
10.6.2 Calibration
10.6.3 Overload
10.6.4 Calibration Repeated
10.6.5 Temperature
10.6.6 Endurance
10.6.7 Calibration Repeated
10.6.8 Rupturing Capacity
10.6.9 Trip-Out
10.6.10 Dielectric Strength
Tables
Figures
Appendix A Circuit calibration and Instrumentation for
Testing Breakers with High Interrupting Ratings