Introduction In modern electrical systems, protection relays are critical for ensuring safe and efficient operations. These devices safeguard assets and maintain power stability by swiftly detecting and isolating faults. This guide explores the different types of protection relays and their testing procedures, with a focus on tools like secondary injection test sets and three-phase relay... Learn More

Relay protection systems are essential in maintaining the safety and reliability of modern electrical grids. As technology advances and grids become smarter, the tools used to test and maintain these systems, such as the relay test set, are evolving to meet new challenges. This article explores the current trends, innovations, and market insights surrounding relay... Learn More

The world of electrical relay testing is evolving rapidly, driven by the adoption of innovative standards like IEC 61850. This international protocol is revolutionizing substation automation systems (SAS) and bringing unprecedented capabilities to secondary injection test sets, three-phase relay test sets, and single-phase relay test sets. By integrating IEC 61850-enabled devices, engineers can streamline testing... Learn More

Understanding Transformer Excitation Current in Substation Maintenance In the realm of substation maintenance, understanding the intricacies of transformer operation is crucial. One key aspect is the transformer’s excitation current. Whether dealing with circuit breaker testing, employing a primary injection test set, conducting high voltage testing, or utilizing a relay tester, knowledge of excitation current is... Learn More

4 Tests you need to know to evaluate Circuit Breaker performance Circuit breakers are one of the most intricate and essential mechanical components in the electrical power system. Their primary function is to interrupt both normal operating and short-circuit currents and manage routine adjustments in system configuration. A range of tests can be performed on... Learn More

How to Test the Electromechanical Protective Relay? Even though time flies and protection systems have been implementing more and more modern and advanced relays, many places still have operation backboned by Electromechanical ones. Design First of all, let’s clarify what is, in fact, an EMR, or the Electro-mechanical Relay? An electromechanical relay operates by utilizing... Learn More

WHAT IS SYNCHRO CHECK RELAY AND HOW TO TEST IT? Synchro check or sync check relays are used to verify that voltage, phase angle, frequency and phase rotation across two sides of a breaker are the same prior to closing the breaker. Synchrocheck relays ensures that bus and line side voltages are within programmed differentials... Learn More