Microcomputer Harmonic Suppression Device

This product is suitable for low-current power supply systems with voltage levels of 380V, 3kV, 6kV, 10kV, 35kV, and 66kV, where the neutral point is ungrounded or grounded via an arc suppression coil. When a ferroresonant, grounding, or overvoltage fault occurs in the system, it eliminates and records the ferroresonant fault and monitors and records single-phase grounding and overvoltage faults. Note: This device can only eliminate non-permanent ferroresonant faults induced by external factors; it cannot eliminate other PT overvoltages caused by persistent external factors.

The SMR-WXA series microprocessor-based resonance elimination device is a new type of intelligent resonance elimination device developed and manufactured based on extensive user feedback, addressing the serious accidents of voltage transformer (PT) burnout or even explosion that frequently occur in power systems due to ferroresonant resonance. It uses a high-performance ARM chip as its core, outputs a high-power, contactless resonance elimination element, and features a human-machine interface with an LCD display, signal indicator lights, and touch buttons, coupled with intelligent software, forming a technologically advanced and user-friendly intelligent resonance diagnosis, elimination, and recording device. Compared with similar devices, this device features high integration, strong anti-interference capability, small size, light weight, and rapid operation.

The device displays the system clock in real time and, through button operation, can display the total voltage and main oscillation frequency of the PT open delta of sections 1-4 of the busbar in real time. It can distinguish between overvoltage and resonance. Field operation in large enterprises in power, metallurgy, coal, petroleum, and chemical industries has proven the device's superior performance and safe and reliable operation.

* Wide-temperature LCD screen with human-machine interface for easy operation.

* High-quality digital-to-analog converter with good temperature resistance, fast conversion speed, and high measurement accuracy.

* Highly reliable thyristor harmonic elimination circuit for rapid and reliable harmonic elimination.

* Eliminates ferroresonant resonances at frequency division, power frequency, and harmonic harmonics.

* Distinguishes between ferroresonant resonance and overvoltage.

* Provides passive alarm nodes.

* Relevant information is uploaded to the backend via a communication interface.

* Fault record information can be displayed on the LCD screen to recall grounding faults; information is not lost after power failure.

Baoding Simaier Electric Co., Ltd. was established on July 1, 2009 and is located in the National High-tech Industrial Development Zone of Baoding City, Hebei Province. It is a high-tech enterprise focusing on the research and development of power system automation, relay protection and instrumentation.