A comprehensive guide to the standards governing circuit breaker testing, maintenance, and safety practices.
American National Standards Institute
Primary standards governing circuit breaker ratings, testing, and performance in North America.
Establishes the basis for rating high-voltage circuit breakers including voltage, current, and interrupting capacity.
Specifies preferred ratings for high-voltage circuit breakers to ensure interchangeability and standardization.
Defines test procedures for verifying the performance of high-voltage circuit breakers against their ratings.
Covers ratings, performance requirements, and testing for low-voltage power circuit breakers.
Institute of Electrical and Electronics Engineers
Comprehensive standards for circuit breaker application, testing, and maintenance practices.
Application guidelines for selecting and applying high-voltage circuit breakers in power systems.
Supplementary guide for understanding and applying ratings based on symmetrical current basis.
Requirements for the conversion and retrofit of existing switchgear with different manufacturers equipment.
Methodology for calculating arc-flash incident energy and determining PPE requirements.
InterNational Electrical Testing Association
Testing specifications that define the acceptance and maintenance testing procedures.
Specifications for testing newly installed electrical equipment before energization. Ensures equipment is properly installed and functioning.
Specifications for periodic testing of in-service electrical equipment. Defines test intervals based on equipment type and criticality.
Comprehensive specifications for commissioning new electrical installations including testing, documentation, and verification.
National Fire Protection Association
Safety standards and codes for electrical systems, maintenance, and personnel protection.
The primary code governing electrical installations in the United States. Includes requirements for circuit breaker installation and application.
Guidelines for establishing an effective electrical preventive maintenance program including circuit breaker testing intervals.
Requirements for safe work practices around electrical hazards including arc flash protection and lockout/tagout procedures.
Based on NETA MTS guidelines for typical commercial and industrial applications.
| Equipment Type | Acceptance Testing | Maintenance Interval |
|---|---|---|
| Low Voltage Power Circuit Breakers | Before energization | 1-3 years |
| Medium Voltage Circuit Breakers | Before energization | 1-3 years |
| High Voltage Circuit Breakers | Before energization | 3-5 years |
| Protective Relays | Before energization | 1-3 years |
| Switchgear Assemblies | Before energization | 3 years |
* Actual intervals should be adjusted based on operating environment, criticality, and manufacturer recommendations.
All Circuit Breaker testing and refurbishment services are performed in accordance with applicable ANSI, IEEE, and NETA standards. Our test reports include all required documentation for compliance verification.