The electrical safety distance for transformers refers to the minimum distance that must be maintained between electrical equipment and personnel or objects to ensure safety and avoid electrical accidents during operation and maintenance. The specific safety distance depends on the transformer's rated voltage, operating environment, and relevant national or regional electrical safety standards. Common electrical safety distance reference standards are as follows:
Low Voltage Transformers (typically up to 1000V):
For low-voltage equipment, the electrical safety distance is generally required to be between 1 meter and 1.5 meters. Specific requirements may vary depending on the on-site working environment and safety regulations.
Medium Voltage Transformers (typically 1kV to 35kV):
For medium-voltage equipment, the electrical safety distance is usually required to be between 1.5 meters and 3 meters. This distance may be adjusted according to the transformer's rated voltage and specific on-site operational requirements.
High Voltage Transformers (typically above 35kV):
For high-voltage transformers, the safety distance is typically required to be at least 3 meters or more. The specific safety distance may vary based on the equipment's rated voltage, operating environment, and electrical protection levels.
Electrical Gaps (in power facilities):
There should be clear physical separation between the high-voltage and low-voltage sections of the transformer to prevent electrical shocks or arc transmission. These separations depend on the transformer's rated voltage and electrical equipment design standards.
Protective Measures and Signage:
In addition to maintaining physical safety distances, protective fences, warning signs, or insulation barriers should be set up to ensure that workers do not come into contact with dangerous electrical components when approaching the transformer.
These safety distances are designed to prevent electrical hazards such as equipment failure, leakage, or arcs that could result in electric shock, ensuring the safety of workers and the public. When designing and installing transformers, it is essential to comply with local electrical safety standards and regulations, such as those from the International Electrotechnical Commission (IEC), China's national standards (GB), or the U.S. National Electrical Code (NEC), to ensure all safety requirements are met.
