What industries and equipment are step-up transformers commonly used in?

1. Power Transmission and Distribution & Substations
Used to upgrade low-voltage distribution networks to high-voltage transmission levels, ensuring voltage stability and power density during long-distance power transmission.
Dedicated step-up transformers are often used at grid connection points in large-scale energy storage projects, wind farms, and photovoltaic power plants to achieve high-voltage grid connection.
2. Industrial Production & Mining Equipment
Suitable for boosting the voltage required by heavy machinery (such as crushers, ball mills, and conveyor belts) in mines, tunnels, and mineral processing plants, solving the voltage drop problem caused by long-distance power supply.
In high-load environments such as factory workshops and underground mines, step-up transformers provide reliable power isolation and voltage boosting, improving equipment startup success rates.
3. Renewable Energy Systems
In distributed photovoltaic, centralized power collection, and wind power projects, step-up transformers are responsible for upgrading low-voltage DC/AC power to the 10kV~110kV level required by the grid, achieving efficient grid connection.
High-voltage power transmission scenarios such as offshore wind power and offshore photovoltaic power also rely heavily on efficient step-up transformer equipment. Ningbo Chuangbiao's EI-type core design is specifically developed to meet these needs.
4. Special Scenarios and Electric Vehicle Charging Stations
In applications requiring the upgrading of mains power to higher voltages, such as electric vehicle fast charging stations, aviation ground power supplies, and ship power systems, step-up transformers provide safe and stable voltage conversion.

How to determine if a step-up transformer is faulty or damaged?

1. On-site visual and auditory inspection
Observe the core and windings for abnormal vibrations, looseness, or a burning smell; abnormal noise is often a precursor to a loose core or internal discharge.
Check the oil tank or casing for leaks, abnormal oil levels, or abnormally high oil temperatures. Excessively high oil temperatures usually indicate poor heat dissipation or internal faults.
2. Electrical parameter measurement
Use a multimeter or dedicated instrument to measure the input/output voltage. If the output voltage is lower than the rated value and the ratio to the input voltage does not match the design (abnormal step-up ratio), it can be determined as an abnormal step-up/step-down voltage.
Insulation Resistance, Leakage Current, No-Load Current, and Short-Circuit Impedance are compared with the manufacturer's rated values. Abnormal increases or deviations indicate insulation aging or winding short circuits.
3. Load and Switching Tests
Under safe conditions, rated load operation is performed, monitoring temperature, power, and current waveforms. Rapid temperature rise or distorted current waveforms suggest internal short circuits or localized overheating.
Comparative tests are conducted by switching between different power supplies or loads. If the fault only occurs under specific operating conditions, the fault location can be further pinpointed.
4. Oil Sample Gas Analysis and Gas Ratio Method
Dissolved gas analysis is performed on transformer oil samples, detecting the concentrations and ratios of key gases such as hydrogen, methane, ethylene, and acetylene. The fault types corresponding to abnormal gas ratios are clearly defined in IEC/GB standards.
Based on gas ratios such as R₁, R₂, and R₅, the type of fault is determined, providing a basis for preventative maintenance.