Class IV supply, also known as a Class 4 power supply, is a type of power supply that provides electrical power to devices or equipment that require a higher level of protection against electric shock and fire hazards. This type of power supply is commonly used in medical equipment, industrial machinery, and other applications where safety is of utmost importance. Class IV supplies are designed to provide a high level of isolation between the input and output circuits to prevent electric shock and ensure the safety of operators and users. They also offer protection against short circuits, overloads, and other electrical faults that could potentially damage the equipment or cause harm to individuals.

One of the key features of a Class IV power supply is its ability to provide galvanic isolation between the input and output circuits. This isolation helps to prevent electric shock by breaking the electrical connection between the two circuits, reducing the risk of current flowing through the user or operator in the event of a fault. Galvanic isolation is achieved through the use of transformers or optocouplers, which provide a barrier to prevent the transfer of electrical energy between the input and output circuits. This feature is essential for ensuring the safety of equipment operators and users, particularly in high-risk environments where the risk of electric shock is elevated.

In addition to galvanic isolation, Class IV power supplies also provide protection against short circuits, overloads, and other electrical faults that could potentially damage the equipment or pose a safety hazard. These power supplies are designed to detect and respond to abnormal operating conditions quickly, shutting off the power supply to prevent damage to the equipment or injury to individuals. Overcurrent protection, overvoltage protection, and other safety features are typically included in Class IV power supplies to ensure reliable and safe operation in a variety of applications.

Overall, Class IV power supplies are essential components for ensuring the safety and reliability of electrical equipment in a wide range of applications, from medical devices to industrial machinery. With their high level of protection against electric shock and fire hazards, these power supplies play a critical role in preventing accidents and ensuring the safe operation of equipment in demanding environments. By providing galvanic isolation, protection against electrical faults, and other safety features, Class IV power supplies help to mitigate risks and protect both equipment and individuals from harm.