Reliable protection starts with accurate relay testing. Megger’s single-phase test sets are designed to help you verify relay performance quickly, reduce faults, and optimize system reliability.
Compact, cost-effective, and easy to use, they deliver precise measurements for overcurrent, voltage, and frequency relays across a wide range of applications.
From industrial switchgear to rail power networks, our instruments simplify fault diagnosis, support routine maintenance, and ensure compliance with protection standards.
Built for both field and bench use, Megger’s single-phase solutions give you the confidence to detect issues early, minimize downtime, and keep your protection schemes operating exactly as intended.
Even though being a single-phase relay tester, the unit has same IEC 61850 capability as its multi-phase siblings. Furthermore, multiple single-phase systems can be daisy-chained to act like a multi-phase system.
Yes, injecting a continuous high current can thermally overload the relay. Most overcurrent relays should not be exposed to more than 10x their rated current for over one second.
To test high pickup values safely, Megger’s SMRT test sets include a pulse ramp feature. This function applies short current pulses that increase step by step in amplitude. It keeps the relay within its thermal limits while still allowing accurate pickup point measurement. This approach prevents damage and ensures repeatable, safe testing even at high settings.
Single-phase test sets are ideal for testing a wide range of protection relays that operate based on a single input quantity, such as:
They’re well-suited for routine checks, commissioning, and troubleshooting of relays in substations, industrial facilities, and rail power systems. For multi-element or distance relays, a three-phase set is typically required.
In some cases, yes—but with limitations. A single-phase relay test set can test certain functions of a three-phase relay, such as individual overcurrent or undervoltage elements.
However, for functions that require phase relationships, such as differential protection, synchro-check, or distance relays, a three-phase test set is required to simulate realistic power system conditions.
Single-phase sets are ideal for targeted tests and basic troubleshooting, especially in the field or when portability is important.
Not necessarily. Many of Megger’s single-phase relay testers—such as those in the SVERKER series—are fully functional as standalone units. You can perform manual testing, adjust outputs, and measure response times directly from the front panel.
However, using a computer with RTMS software adds automation, custom test plans, and report generation capabilities. So while a PC isn’t required, it can significantly enhance productivity and repeatability, especially during commissioning or large-scale testing.
Talk to our relay testing experts about your specific application. Whether you're commissioning, troubleshooting, or maintaining protection systems, we’ll help you find the right single-phase solution—fast, reliable, and ready for the field.
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