Microprocessor-based Resonance Eliminator (with Printer) 01
Microprocessor-based Resonance Eliminator (with Printer) 02

Microprocessor-based Resonance Eliminator (with Printer)

  • In power systems, ferroresonance occurs frequently; during resonance, it generates overvoltages that pose a serious threat to system safety. Ferroresonant overvoltages can occur in any system ranging from 3 kV to 220 kV; this is particularly true in power grids rated at 35 kV and below, where almost all internal overvoltage incidents are caused by ferroresonance. The overvoltages induced by ferroresonance are long-lasting and may even persist for extended periods. During sub-harmonic resonance, the overvoltage magnitude is generally not high; however, the current flowing through the Potential Transformer (PT) is substantial, making the PT susceptible to overheating and subsequent explosion. Conversely, during fundamental-frequency and super-harmonic resonance, the current is typically low, but the resulting overvoltage is extremely high, frequently causing damage to equipment insulation and leading to severe accidents.
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Descripción

Applicable Scope: 3kV–35kV systems.
Harmonic Elimination Channels: 1 channel (2-channel versions available upon request).
Applicable Resonance Frequencies: High-frequency, low-frequency, and power-frequency resonance.
Harmonic Elimination Activation Voltage: 30V for low-frequency resonance; 120V for power-frequency and high-frequency resonance.
Voltage Measurement Accuracy: 2%.
Frequency Measurement Accuracy: ±1Hz.
Alarm Relay Contact Capacity: AC 240V/5A, DC 30V/5A.
Communication Interface: RS485 @ 9600bps.
Power Supply: AC 220V ±10%, DC 220V ±10%.
Ambient Temperature: –10°C to +50°C.
Altitude: Less than 2000 meters.
Operating Temperature: –10°C to +60°C.
Relative Humidity: 90% (at 25°C), 50% (at 40°C).
The installation site must be free from corrosive gases, vapors, and conductive dust; it must also be free from explosive gases and gases that degrade insulation properties.
The installation site must be equipped with facilities for protection against wind, rain, and dust.

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