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Project Case | Saudi Arabia: 60 Hz / 13.8 kV + diesel generator; all eight high-voltage soft starters started successfully on the first attempt.

05-13

The Saudi project faces a triple challenge: extreme high temperatures and sandstorms, a 60-Hz grid, and the weak grid conditions typical of diesel generator sets. Otto soft starters, leveraging thyristor phase‑shift control and an adaptive current‑ramp algorithm, precisely limit inrush current, prevent voltage dips, and safeguard the generator set. All equipment achieved successful full‑load startup on the first attempt, with zero failures and zero rework, demonstrating key advantages such as wide‑band frequency and voltage tolerance, robust starting under weak‑grid conditions, and exceptional durability in harsh environments.

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Project Case | Changsha ATA High-Voltage Soft Starter Retrofit Helps Revitalize the Energy Transmission System

02-28

In the field of energy transmission, the reliability and operational efficiency of systems directly impact overall operational safety and economic benefits. Recently, our company successfully completed a high-voltage soft-start system upgrade project for a key oil pumping station belonging to a large crude oil storage and transportation company. Driven by innovative technology, we helped the client achieve comprehensive upgrades to their equipment and optimize their operational modes.

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The Changsha ATA 28,000 kW high-voltage solid-state soft starter has been successfully put into operation, achieving a high-end domestic substitution.

12-11

Recently, a 28,000-kW high-voltage solid-state soft starter—entirely independently developed by Changsha Otto Automation Technology Co., Ltd.—has been successfully put into operation at a major petrochemical base in China, further strengthening our country's technological prowess and market competitiveness in the field of solid-state soft starting technology for high-power motors.

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Project Case | Solving the Challenge of High-Power Motor Startup! Changsha ATA’s “Energy-Saving Soft Starter Device” Powers Steel Enterprises’ Air Separation Systems for Efficient and Stable Operation

09-19

In high-energy-consuming industries such as steel, petrochemicals, and mining, the startup of high-power motors has always been a critical challenge—characterized by significant inrush currents, severe voltage drops in the power grid, and a high risk of mechanical damage. These issues not only affect production efficiency but also pose serious threats to equipment safety. Recently, Changsha ATA's independently developed ATAF-H10/18000 medium- and high-voltage soft-starter device for energy-saving applications was successfully deployed in a large-scale air separation and gas supply project at a major steel enterprise. With its outstanding performance, the device achieved three major breakthroughs: "smooth startup, stable grid operation, and robust mechanical protection," setting a new industry benchmark.

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Project Case Study | Application of Changsha ATA Mining General-Purpose High-Voltage Soft Starter Cabinet at a Certain Copper Mine

08-07

In the extreme environment of deep-well mines, the stable operation of the drainage system is crucial. A large copper mine successfully applied six Changsha ATA GKGR-300/06(K) general-purpose high-voltage soft-start control cabinets to the main drainage system of its -660m section. This effectively overcame challenges such as extreme depth, high humidity, strong corrosion, high dust levels, and severe power grid fluctuations, ensuring the reliable operation of the drainage system.

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ChangSha ATA Technology safeguards African copper smelting giant: High-pressure soft start contributes to project's successful commissioning

07-23

Deep in the heart of the African continent, the Kamoa copper smelting project, a mega-project with an annual output of 500,000 tons of cathode copper, is operating with tremendous power. The stable operation of its core power system comes from high-voltage solid-state soft-start technology made in China. The 22 sets of high-voltage solid-state soft-start devices, as the core power guarantee for the project, have demonstrated their excellence, writing a new chapter for Auto soft-start devices' overseas expansion.

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