Progressive type SPD comes with the 5 successive LED lights that indicates the healthiness of the SPD so that any damage will not occur to the system in case of failure of Surge protector.
Fault detection about the surge protection device(SPD) might be immeasurable sometimes, to get the precise result for the same SPD with progressive indication is manufactured by JMV. In this device, there is red light indication that provide the replacement of the same is needed and green light informs about the proper functioning of device is in accurate state. As we know that the surge protection device eliminates the risk of surge thus to protect the device the installation of the SPD with progressive indication is must. It is a manageable device that has assured continuous protection.