Megger SMRT33 relay test system

Description

Compact Powerhouse: The Smallest Three-Phase Relay Tester

The Megger SMRT33 relay test system stands out as the smallest and lightest high-output three-phase relay tester currently available. Designed specifically for portability without compromising capability, the SMRT33 brings unprecedented convenience to field engineers and substation technicians globally. Its compact and rugged fiberglass-reinforced plastic enclosure ensures both durability and ease of transport, whether moving between substation bays, transporting across utility yards, or checking in as airline luggage. Unlike traditional bulky models, the SMRT33, weighing just about 10.5 kg without the lid, efficiently fits into demanding on-site testing scenarios. The ergonomically designed oversized handle, rubber-cushioned for comfort, and removable protective lid underline its ergonomic, user-centric engineering. By dramatically reducing the tester’s physical footprint, the SMRT33 allows for easier onsite deployment, more flexible set-ups, and quicker relocation during multi-stage test routines.

Unrivaled Output Performance for Diverse Applications Worldwide

Despite its small form factor, the SMRT33 is a powerhouse of electrical output. Three current channels each supply continuous currents up to 32 amps at 200 VA per phase and reach an impressive 45 amps at 300 VA for short bursts, enough to handle even the most demanding electromechanical or microprocessor-based overcurrent relays. When current channels are paralleled, a staggering 135 amps at 900 VA is available, enabling effortless instantaneous overcurrent relay tests in heavy industrial and utility environments. The voltage channels produce variable outputs of up to 0-300 volts at 150 VA with a unique flat power curve from 30 to 150 volts, guaranteeing maximum output to loads across this range. With high compliance voltages and robust current outputs, the SMRT33 tests not only conventional overcurrent, differential, direction, under/over voltage relays, but also high-impedance directional ground relays common in advanced protection schemes. The wide output spectrum (DC up to 1 kHz, with transient signals up to 10 kHz) covers an exceptional breadth of relay and device testing requirements.

Intuitive Manual Operation with Smart Touch View Interface

One of the most revolutionary aspects of the Megger SMRT33 is its ability to operate independently of a PC, thanks to the Smart Touch View Interface (STVI). The STVI is a full-color, high-resolution TFT LCD touch screen that allows engineers to easily run manual, steady-state, and dynamic relay tests directly from the unit. This greatly simplifies fieldwork by eliminating the need for laptops or external controllers during routine relay diagnostics or settings validation. The interface offers quick access to manual and preset test routines for popular relay types, streamlining workflow and reducing training time for new operators. Large, intuitive menu screens and easy-to-navigate touch buttons ensure rapid selection of test functions and immediate start of test sequences. Test results can be instantly saved and exported via memory stick for documentation and further analysis—vital for both quality control and regulatory compliance.

Complete Automation: Advanced Software and IEC 61850 Support

For complex test regimens and high-volume environments, the SMRT33 can be fully controlled automatically using Megger’s Advanced Visual Test Software (AVTS), compatible with most modern Microsoft Windows platforms. AVTS manages every aspect of protection relay testing, allowing users to create and run custom scripts, perform automated testing, and even import COMTRADE files for transient fault replay scenarios. Of particular significance is the SMRT33’s integrated IEC 61850 test capability. Through dedicated Ethernet ports, users can conduct testing on digital substation networks, publish and subscribe to GOOSE messages, and validate modern communication-based protection schemes. This flexibility makes the SMRT33 indispensable for utilities upgrading to IEC 61850-based infrastructure, as well as for third-party validation and commissioning of smart grid components. Optional Bluetooth provides wireless operation, further enhancing convenience and operational safety, especially in environments where wired connections may be difficult or hazardous.

Wide Range of Dedicated Applications and Users

The versatility of the SMRT33 ensures applicability across a spectrum of scenarios:

• Power Utilities: Capable of testing all types of protective relays in transmission and distribution substations, including those with high-impedance protections and IEC 61850 testing requirements.
• Industrial Automation: Essential for factories and plants with distributed generation, motor protection, and advanced automation requiring routine relay calibration and end-to-end scheme verification.
• OEM Manufacturers: Vital in relay development, type testing, and quality assurance, offering accurate reproducible test results for electromechanical, solid-state, and digital relays.
• Renewable Energy: Useful in wind, solar, and hybrid systems for validating interface protection and anti-islanding relays.
• System Integrators and Commissioning Experts: Enables rapid scheme checks, dynamic end-to-end tests, and efficient data collection, even in geographically remote or logistically challenging environments.

By supporting manual and automated workflows, and with a software suite that can be expanded as needs grow, the SMRT33 adapts from small teams performing simple maintenance to large organizations with nuanced, high-throughput relay testing programs.

Advanced Safety, Compliance, and Durability Standards

Megger’s dedication to safety and regulatory compliance is reflected in every aspect of the SMRT33. The tester conforms to EN 61010-1 for general safety, has been drop-tested and vibration-qualified to both US military and international standards, and is encased in an IP30-rated enclosure resistant to moisture and dust. All output channels are fully isolated and thermally/protectively monitored, minimizing the likelihood of damage during extreme operation or accidental misuse. Voltage outputs are protected from both short circuit and prolonged overload, while current outputs are safeguarded against open circuit and overload events. In addition to safety, the device is certified for electromagnetic compatibility per EN 61326-2-1 and relevant FCC standards, ensuring reliable operation even in harsh electrical environments — critical for substations, switchyards, and industrial plants with significant transient noise.

Leading Global Distribution: Why tpt24 Stands Above

For professionals seeking the SMRT33, sourcing from a reputable distributor is crucial. tpt24 is renowned as the world’s premier online retailer for the Megger SMRT33 relay test system. tpt24 not only guarantees product authenticity and official manufacturing warranty, but also assures global delivery with swift, professional logistics regardless of your country. With dedicated technical support and after-sales care, tpt24 ensures customers receive comprehensive assistance before and after purchase, making it the top online destination for relay testing instruments. By choosing tpt24, engineers, utilities, and service companies worldwide access the full capabilities of the SMRT33, supported by the peace of mind that only genuine Megger equipment can provide.

The Future of Protection Relay Testing Technology

The SMRT33 is more than just a compact relay test set; it’s an investment in reliability, safety, and operational efficiency for any organization managing electrical protection systems. Its modular hardware options, expandable software, uncompromising electrical performance, and world-class build quality distinguish it in an increasingly digital and demanding landscape. Whether deployed in basic overcurrent relay adjustments, complex multi-phase simulation, or advanced IEC 61850 network validation, the SMRT33 delivers consistency, accuracy, and ease of use. As power grids evolve and expectations for uptime and safety escalate, the SMRT33 remains a future-proof partner for rigorous protection system maintenance, commissioning, and compliance.