Definition - What does Clamping Voltage mean?
Clamping voltage refers to the maximum amount of voltage that can pass a surge protector or electrical breaker before it restricts further voltage from passing to a device or computer. It is a process through which a device or equipment is protected from electrical surges.
Techopedia explains Clamping Voltage
Clamping voltage techniques are implemented in most modern electrical and computing devices that rely on a constant electrical current to operate. Clamping voltage primarily enables a computer or any electronic device to receive voltage that is not higher than its baseline. The maximum voltage distributed to homes and offices ranges from 120 volts to 240 volts.
Any device that is capable of receiving a maximum of 120 volts can crash or malfunction if it is supplied with higher voltage. Clamping voltage ensures that the computer's or device's input voltage supply remains within the baseline. Any electrical surge that is greater than the baseline is earthed by the surge protector, while normal voltage is continuously supplied to the device.