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-Currently, THT is the official distributor of GE protective relay products in Vietnam market. The electrical system in Vietnam uses a lot of GE relays provided by THT. All of them work stably and receive high performance ratings from the users.

Hotline : 0976 33 55 58

*   Transformer is applied in electrical system with the purpose of reducing power loss during long-distance transmission of electricity - from production to consumption. Understanding the importance of transformers in the system, GE relays offer great features such as:

- Diverse product segments: GE has a wide range of products suitable for many power levels of transformersMultifunctional protection relay: Integrates many protection functions from basic such as 50/51, 49, ... to advanced functions such as 87T, 87GT, ... in accordance with protection requirements of cutomer
- Advanced technology: GE's patented technology helps the transformer operate effectively, reducing operation losses as well as increasing the life of the transformer.
- Multi-relay relays: Integrating communications from the most popular to the most modern such as Modbus RTU / TCP-IP, IEC61850, ... GE relays can connect well with existing systems of factory.
- Exemplary design: With the standard 19 "Rack design, the GE relays are suitable for most existing electrical panel designs. In addition, the draw-out design series saves time. testing, installation and maintenance-upgrade time, believing that customers will be satisfied with GE's products.
- Works well with a variety of environmental conditions: With an IP54-rated body and standards for impact resistance, GE relays work well in a variety of difficult conditions smoothly. In addition, with the patented work environment monitoring system, GE relays show all necessary parameters of operating conditions and equipment conditions.

> In addition, when using GE products, customers also enjoy additional incentives:

+ Designed, tested and fully assembled at GE facilities
+ Guaranteed under GE's 10-year warranty


DEVICE NUMBER FUNCTION 51N Neutral Time Overcurrent
21P Phase Distance 51P Phase Time Overcurrent
21G Ground Distance 59N Neutral Overvoltage
24 Volts Per Hertz 59P Phase Overvoltage
25 Synchrocheck 59X Auxiliary Overvoltage
27P Phase Undervoltage 67N Neutral Directional Overcurrent
27X Auxiliary Undervoltage 67P Phase Directional Overcurrent
49 Thermal Overload 68 Power Swing Blocking
50BF Breaker Failure 78 Out-of-Step Tripping
50G Ground Instantaneous Overcurrent 81O Overfrequency
50N Neutral Instantaneous Overcurrent 81U Underfrequency
50P Phase Instantaneous Overcurrent 81R Rate of Change of Frequency (ROCOF)
50/87 Instantaneous Differential Overcurrent 87G Restricted Ground Fault
51G Ground Time Overcurrent 87T Transformer Differential



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