Independent Professional Case Analysis Report (2025 Official Electrical Accident Cases)

This report selects two typical official electrical safety accident cases newly announced in 2025, focusing on equipment insulation aging & grounding failure electric shock accidents and live circuit debugging electrical runaway accidents. The cases are highly representative of industry latent electrical hazards. Through accident restoration and root cause analysis, it verifies Qiaosen’s comprehensive electrical safety protection advantages, providing professional upgrading standards for factory electrical safety rectification.

In July 2025, a hardware processing enterprise in Dongguan had a fatal electric shock accident. The on-site investigation showed that the workshop’s old punch press had been used for more than 6 years. The long-term erosion of workshop oil pollution and dust caused serious aging and peeling of the equipment’s internal wire insulation layer. The enterprise did not conduct regular electrical safety inspection and maintenance, and the equipment grounding wire was loose and virtually connected, resulting in long-term hidden electrification of the punch press shell. When the operator cleaned the residual materials with wet hands, he touched the equipment shell and suffered an electric shock, resulting in on-site death. The accident was identified as a typical safety accident caused by inadequate inherent electrical safety of equipment and missing daily electrical maintenance.

The core causes of the accident include two major inherent defects of traditional equipment. First, the electrical configuration is simple, the wire insulation grade is low, and it cannot adapt to long-term harsh workshop environments, leading to inevitable aging and damage. Second, the grounding system is not standardized, lacking real-time monitoring of grounding resistance. Virtual grounding failure cannot be detected in time, resulting in latent electrification of the equipment. In addition, traditional equipment has no leakage self-check and alarm function, and latent electrical hazards accumulate for a long time until accidents break out.

Qiaosen completely avoids similar accidents through high-standard electrical inherent safety design. The whole machine adopts oil-proof, dust-proof and aging-resistant industrial insulated wires, which are not easy to damage in long-term workshop operation. The standard full-process equipotential grounding system ensures stable grounding resistance for a long time and avoids shell electrification caused by virtual connection. The built-in electrical fault self-diagnosis system monitors insulation and grounding status in real time. Once abnormal grounding or insulation aging is detected, the equipment will actively alarm and lock operation, fundamentally eliminating latent electric shock hazards caused by aging electrical systems.

In April 2025, a mechanical processing enterprise in Shenzhen had a stamping injury accident. The enterprise’s maintenance personnel carried out live debugging on the punch press control circuit without power-off and lockout. The aging circuit of the traditional punch press was short-circuited instantaneously, resulting in disordered program logic and sudden runaway of the punch press slide. The staff who were debugging the mold were caught in the dangerous area, resulting in serious crush injuries. The investigation confirmed that the equipment lacked electrical fault interlock protection, and the live debugging operation triggered abnormal circuit action, which was the direct cause of the accident.

Traditional ordinary punch presses have no electrical fault interlock and abnormal power-off protection logic. When facing live debugging, circuit short circuit and voltage instability, the equipment cannot automatically lock the program. Abnormal electrical signals will directly trigger mechanical action, leading to equipment runaway. At the same time, the lack of electrical operation safety interlock allows arbitrary live debugging, which greatly increases the risk of man-machine collision accidents caused by electrical abnormalities.

Qiaosen punch presses are equipped with electrical abnormality full interlock protection logic. In case of circuit short circuit, voltage instability and signal abnormality, the system will immediately cut off the power supply and lock the mechanical action to prevent equipment runaway. At the same time, the equipment has a mandatory power-off self-locking function in the maintenance state, which prohibits any live debugging operation from the program level. It completely avoids equipment disorder and mechanical injury accidents caused by electrical abnormalities and non-standard electrical maintenance.

Through the analysis of the latest electrical safety cases, it is verified that latent electrical hazards are the key safety blind spots in the stamping industry. Traditional punch presses focus only on mechanical protection and lack systematic electrical safety design, resulting in frequent electric shock and electrical runaway accidents. Qiaosen punch presses take the lead in realizing the deep integration of mechanical safety and electrical safety, covering all risk points such as insulation aging, grounding failure, leakage abnormality and circuit disorder. It builds a comprehensive three-dimensional safety barrier for stamping production, helping manufacturing enterprises eliminate latent electrical safety hazards and achieve safer and more compliant high-quality production.