In today's rapidly evolving technological landscape, Nanjing Oulu Electric Co., Ltd. has been forging ahead in the industry for 18 years, leveraging its high-tech expertise in independent R&D and manufacturing of inverters. As a national high-tech enterprise and a specialized "Little Giant" firm dedicated to innovation and excellence, we remain committed to pioneering cutting-edge solutions and pursuing unparalleled quality.

The company's independently developed EV200-EA series high-performance vector inverter is meticulously engineered for oilfield applications, reflecting Oulu Electric's innovative spirit in specialized fields. A standout feature of this inverter is its ability to seamlessly switch between synchronous and asynchronous motor applications through parameter adjustments—achieving perfect dual functionality without the need to replace the inverter motherboard. This significantly enhances user convenience and operational flexibility.

In terms of functionality, the EV200-EA series frequency converters not only incorporate the basic features of standard inverters but also offer a range of exclusive characteristics tailored specifically for oilfield applications:

• 1. Dedicated 485 Address for Oilfield Use: Enables efficient communication with Nanda Aoto RTUs, ensuring accurate and stable data transmission.

• 2. Automatic Voltage Regulation (AVR) Function: This standout feature maintains a constant output voltage automatically during grid fluctuations, providing reliable support for the stable operation of oilfield equipment.

• 3. Overvoltage/Overcurrent Stall Prevention: The frequency converter automatically limits current and voltage during operation, effectively preventing frequent trips caused by overcurrent or overvoltage and significantly reducing the likelihood of failures.

• 4. Fast Current Limiting Function: Greatly reduces overcurrent faults, strongly protecting the frequency converter's normal operation and extending equipment service life.

• 5. Speed Tracking Restart Function: Allows smooth and shock-free starting of rotating motors, reducing wear and energy loss during motor startup.

When it comes to overload capacity, the EV200-EA series frequency converters deliver equally impressive performance. The G-type models support 150% rated current for 60 seconds and 180% rated current for 3 seconds, while the P-type models offer 120% rated current for 60 seconds and 150% rated current for 3 seconds. This robust overload capability enables them to handle a wide range of demanding operating conditions.

Nanjing Oulu Electric Co., Ltd. has never ceased its pursuit of quality. Our frequency converters hold CE certification and CQC certification, and have undergone rigorous testing and verification at a national inspection center accredited with CAL, CMA, and CNAS qualifications, resulting in authoritative test reports. Furthermore, our frequency converters products have received Grade A quality certification from platforms relevant to the oilfield industry. These accolades and certifications are a testament to the exceptional quality of Oulu Electric products.

For 18 years, Nanjing Oulu Electric has forged ahead as a trusted partner in the oilfield industry, consistently driving innovation and delivering reliable solutions backed by professional expertise and superior products. Moving forward, we will continue to harness the spirit of innovation to advance the industry and contribute to the development of a greener and more efficient oilfield sector.