GFR4D10100

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GFR4D10100 is a special type of frequency relay device, designed to protect the electrical equipment from occasions when significant fault currents flow in the circuit. This type of frequency relay can be integrated into a system in which other components are working and the device will monitor the various frequency changes of the (AC) and react accordingly. The following article will focus on its specific application field and working principle.

Application Field

GFR4D10100 is most often used in medium/high voltage electricity networks where it is necessary to monitor and maintain the steady frequency and voltage stability of the power supply. The device can detect even slight variations in the current and respond appropriately to keep the parameters under control. Furthermore, it is also deployed in the power distribution systems of industrial premises occupied by large-scale machinery that requires continuous and reliable operation of its process. The frequency relay device is also used in all medium and high voltage grids of power generating plants to protect them against unexpected frequency fluctuations.

Working Principle

The mechanism used in GFR4D10100 frequency relay is the same as used in conventional over/under frequency protection. The main component of the device is a comparator circuit which is responsible for the comparison or relation between an expected nominal frequency and actual measured voltage frequency. When the comparator circuit finds a significant difference between the expected nominal and measured actual frequencies, the relay will be engaged at an adjustable frequency pick-up, and this will lead to a short-circuit between positive and negative terminals of the circuit. The device will remain in a short-circuit condition until the frequency is restored to its expected nominal value.

In addition to the high-level protection provided by GFR4D10100’s comparator circuit, the device is also equipped with an adjustable dead band time delay. This time delay mechanism provides an effective way to prevent unwanted responses caused by momentary changes in the frequency, avoiding any inadvertent tripping before verifying the state of the system.

All in all, GFR4D10100 is a reliable and cost-effective frequency relay device, suitable for use in a range of applications in medium and high voltage systems. The device is designed to accurately measure frequency changes and respond quickly and effectively to ensure a steady state of operation of electrical power networks.

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