[General Electric] GE MVAJ Trip Relay: Protection and Control Core

2026-03-06

In the protection architecture of power systems, protective relays (such as overcurrent, differential, distance protection, etc.) are precision measuring devices, and their contacts usually do not have the large capacity required to directly operate circuit breaker trip coils. Meanwhile, complex protection schemes may require the simultaneous tripping of multiple circuit breakers or the implementation of control functions such as signaling and interlocking. To address this core issue, GE Vernova has launched the MVAJ 05/10/20 series of trip and control relays. This series is based on mature rotary armature technology and aims to provide a highly reliable, flexible, and fast execution interface between protective relays and circuit breakers.

[General Electric] GE Vernova MVAW 11/13/21 type intermediate relay

2026-03-06

In the fields of power systems and industrial automation, long-distance transmission of control signals always faces many challenges. Long control cables (also known as "long lead wires") not only introduce induced AC voltage interference, but also have problems such as voltage drop and signal attenuation, which may cause control equipment to malfunction or refuse to operate. To address these challenges, GE Vernova has launched the MVAW 11, MVAW 13, and MVAW 21 series intermediate relays. This classic electromagnetic auxiliary relay, with its unique design, ensures reliable and precise remote control of switchgear and related devices even in harsh electromagnetic environments and long-distance transmission conditions.

[General Electric] GE Vernova MMLG/MMLB Test Blocks and Test Plugs

2026-03-06

In the power system, the reliable operation of protective devices (such as relays) is the cornerstone of ensuring the safety and stability of the power grid. Regular secondary injection testing is an essential maintenance step to verify the performance of these protective devices. However, traditional testing methods often require temporary disassembly of wiring, which is not only time-consuming and laborious, but also poses safety hazards such as accidental contact with live equipment and high voltage caused by open circuits in the secondary circuit of current transformers (CTs). The MMLG series test blocks and MMLB multi finger test plugs launched by GE Vernova, as important members of the Midos product family, are specialized testing accessories designed to address these pain points. They provide standardized monitoring and testing interfaces for various power system protection schemes, greatly simplifying the operation process and significantly improving the safety of the testing process.

[General Electric] GE Grid Solutions Hydran M2-X Enhanced Monitoring with Extended Sensor Life

2025-12-16

The Hydran M2-X launched by GE Grid Solutions is a new generation DGA monitoring solution that has been field validated. It is designed specifically for power and industrial transformers, and continuously monitors the gas (H ₂ and other composite gases or single H ₂) and moisture content in insulating oil through fuel cell type gas sensors and thin-film capacitive humidity sensors. It has advantages such as over 10 years of sensor life, 7 years of product warranty, miniaturization without moving parts, low maintenance, and supports seamless integration with multiple communication protocols and GE digital platforms. It can expand monitoring of top oil temperature, load current and other parameters. Combined with IEEE mathematical models and APM software analysis, it can timely warn of faults and reduce unplanned downtime risks. It is suitable for mineral oil, natural and synthetic ester insulating oil transformers