Protective Relay Testing

Precision Protection for Your Power System

Protection relays play a critical role in modern electrical power systems. When correctly configured and maintained, they detect abnormal conditions and initiate circuit isolation to protect people, equipment, and infrastructure. Reliable relay performance is essential to maintaining system safety, uptime, and grid stability.

N.A.B. Technologies provides comprehensive protective relay testing, programming, and upgrade services to ensure your protection systems operate exactly as designed—throughout their entire lifecycle.

Why Protective Relay Testing Matters

Protective relays are the first line of defense in any electrical distribution system. Improper settings, wiring issues, or device failures can result in equipment damage, unplanned outages, or unsafe operating conditions.

Thorough testing and verification ensure:

• Correct fault detection and isolation
• Proper coordination with breakers and protection schemes
• Compliance with industry and insurance requirements
• A reliable baseline for future maintenance and diagnostics

Modern Relay Technology: Smarter Protection

Relay technology has evolved significantly in recent years. Modern microprocessor-based relays now replace entire banks of older electromechanical devices with a single intelligent unit.

These advanced relays offer:

• Enhanced fault detection and system diagnostics
• Faster response times and detailed event reporting
• Reduced panel space and simplified wiring
• Lower long-term maintenance costs

N.A.B. Technologies helps clients transition safely from legacy relay systems to modern digital protection platforms.

Protective Relay Capabilities

We test and commission all major relay manufacturers, including: ABB, SEL (Schweitzer Engineering Laboratories),GE Multilin,Siemens,Basler, and others.

Our experience spans a wide range of protection applications, including:

• Transmission and distribution protection
• Distance protection schemes
• Bus differential protection
• Transformer differential protection
• Feeder protection
• Generator protection
• Large Motor Protection
• Custom and complex control schemes

Relay Testing & Programming Services

N.A.B. Technologies provides end-to-end relay services, including:

• Relay application review and settings verification
• Functional testing of protection schemes and tripping logic
• Installation and commissioning of new relay systems
• Upgrades from electromechanical to digital relays
• Wiring modifications and verification
• As-built drawings and documentation updates
• Development of test plans and procedures
• On-site training for operations and maintenance staff

We ensure your protective relay system operates with the precision and reliability your facility depends on.

Seamless Relay System Upgrades

For clients modernizing their protection systems, we offer complete upgrade solutions, including:

• Safe removal of existing electromechanical relays
• Installation of new digital relays and control wiring
• Integration with breakers, CTs, and trip circuits
• Thorough functional testing and commissioning
• Updated drawings and complete documentation

Electrical Acceptance Testing & Commissioning (Related Services)

In addition to relay testing, N.A.B. Technologies provides electrical acceptance testing and commissioning services for new and retrofitted equipment. Acceptance testing is often required by insurance providers and is essential for verifying compliance with design, code, and performance standards.

Studies show that up to 30% of new electrical equipment may fail due to installation issues, mishandling, or contamination. Proper testing protects manufacturer warranties, establishes a baseline for future maintenance, and identifies issues before energization.

Our services include:

• Electrical acceptance testing
• Commissioning and start-up support
• High-current and diagnostic testing
• Preventative maintenance programs

We are ISN approved

We are Avetta approved

UL/CSA approved

Feel free to contact us, we are ready to help you!

Nathan Burns, President

High Quality Guarantee

We are a UL/CSA approved panel shop with 600 VAC 3-phase and 460 VAC 3-phase equipment for testing.

Qualified Team

Our team combines decades of hands-on experience in designing, supporting, and manufacturing industrial control systems. By bringing together seasoned professionals and emerging talent, N.A.B. Technologies delivers practical solutions backed by real-world expertise and modern engineering approaches.

24/7 Support

N.A.B. Technologies provides reliable 24/7 support to help keep your operations running safely and efficiently. Our team is available to respond quickly to urgent issues, minimizing downtime and ensuring continuity for critical systems.

Quality Components

From design to start-up, our electrical control systems are built to integrate seamlessly into your operations. Using high-quality components from leading electrical suppliers — including Eaton, Allen-Bradley, Siemens, GE, Benshaw, Phoenix Contact, and Rittal enclosure systems — our controls are designed and built to meet the highest industry and safety standards.