When discharging an HV power supply after disabling AC input, what method is suggested?

Discharging a high-voltage (HV) power supply is a critical safety procedure, and using a large value resistor to safely drain the charge to chassis ground is the recommended method. This approach allows for the controlled discharge of the stored energy in the capacitors of the power supply, providing a safe path for the current to flow.

The use of a large value resistor is essential because it limits the current flow during the discharge process, reducing the risk of sparks or electrical hazards that could occur with higher currents. Additionally, this method allows for a gradual discharge, which ensures that the voltage declines at a safe rate, giving the technician time to monitor the process and verify that the power supply has been adequately discharged.

This careful approach is particularly important in high-voltage applications, where the stored energy can be quite significant and potentially dangerous. By ensuring that the charge is drained safely and effectively, technicians can prepare equipment for maintenance or servicing without the risk of electric shock.

While other methods like short-circuiting the output or using a capacitor may seem intuitive, they can lead to hazardous situations. Short-circuiting can result in high current flows that may damage the power supply or cause sparks, and employing a multimeter only measures the current state without actually discharging