Lift safety system and method for testing functionality thereof

An elevator braking system, comprising:

• a first holding brake and a second holding brake;
• a first contact connected between the first holding brake and a drive power supply, and a second contact connected between the second holding brake and the drive power supply;
• and
• a first connector controllably connected in parallel to both ends of the first contact, and a second connector controllably connected in parallel to both ends of the second contact,
• wherein the elevator braking system comprises a first test mode and a second test mode;
• in the first mode, the first connector is connected in parallel to both ends of the first contact, and the second contact is transitioned from a closed state to a disconnected state to determine whether the functionality of the second holding brake is operating normally based on a motion state of a car after the second contact is transitioned from a closed state to a disconnected state;
• in the second test mode, the second connector is connected in parallel to both ends of the second contact, and the first contact is transitioned from a closed state to a disconnected state to determine whether the functionality of the first holding brake is operating normally based on the motion state of the car after the first contact is transitioned from a closed state to a disconnected state.