Important Precautions and Installation Instructions for Using a Single Choke Coiler

Important Notes and Installation Instructions for Using a Single-Diode Clamping CircuitThe LXQ Single Synchronous Condenser Installation: The single synchronous condenser is installed between the neutral point of the transformer and ground, with the lower end fixed to ground and the upper end connected to the neutral point. If installed within the transformer cabinet, the distance between the single synchronous condenser and the surrounding grounding bodies should be ≥2cm. The upper end of the synchronous condenser is connected to the transformer neutral point using insulated wire. The wire should have adequate mechanical strength, with a recommended cross-sectional area of not less than 10 square. The single synchronous condenser does not have positive or negative polarity and is generally vertically installed, but can also be horizontally installed.

Important Precautions and Installation Instructions for Using a Single Damping Resonator

1) If the voltage at the ends of the open delta transformer is less than 0.3V, please check if the ends of the open delta are short-circuited. This type of short-circuit fault does not manifest during normal grid operation but can destroy the three-phase transformer when the single-phase grounding duration is prolonged. This fault is not resonance, and the LXQ harmonic suppressor cannot prevent it. As this fault does not show up during normal operation, it is often overlooked, leading to occasional occurrences in recent years.

2) If the voltage at both ends of the transformer's delta winding is between 0.3-3V, it's possible that the detuning resistor connected to the primary winding has been short-circuited. Please check the wiring of the primary winding. This situation occurs frequently: after the detuning resistor is connected, the grounding wire between the neutral point of the transformer's primary winding and ground has not been disconnected.

3) If the voltage at both ends of the open delta transformer is much higher than 3V, please use the frequency measurement range of a multimeter to measure the voltage at both ends of the open delta. If the voltage frequency is 50HZ, it is caused by the significant difference in the voltage-ampere characteristics of the three-phase transformer. The solution is to select a set of transformers with voltage-ampere characteristics that are basically consistent for use. More often, the voltage frequency is 150HZ, which is due to an excessive third harmonic current in the excitation current of the transformer. When the harmonic current is too high, it can also cause unbalanced three-phase voltage and an increase in system harmonic content. The solution is to install a microcomputer harmonic elimination device.