What critical information must be clearly displayed on a protection device?

The critical information that must be clearly displayed on a protection device includes the voltage rating, current rating, and tripping characteristics. This information is essential for ensuring that the device operates within its designed limits and effectively protects the electrical system it is safeguarding.

The voltage rating indicates the maximum voltage the device can handle, preventing over-voltage scenarios that could cause failures or hazards. The current rating specifies the maximum current that the device can safely carry before it must trip to avoid damage or fire hazards. Tripping characteristics provide information on how quickly and under what conditions the device will interrupt the flow of electricity in the event of a fault. This ensures prompt protection against overloads and short circuits, making it critical for the safe operation of electrical installations.

Thus, having this information clearly displayed allows for proper selection and installation of the protection device, ensures compliance with safety standards, and helps in the effective maintenance of electrical systems.