Relay, circuit system and electric device

The utility model provides a relay, a circuit system and a power utilization device, the relay comprises a first contact, a second contact, a driving mechanism and a detection element, the second contact is arranged opposite to the second contact along a first direction, and the driving mechanism is connected to the second contact. The driving mechanism is used for driving the second contact to move in the first direction so that the second contact can make contact with or be separated from the first contact, and the detection element is used for detecting the distance between the second contact and the first contact in the first direction. In the structure, the second contact moves along the first direction to realize contact or separation with the first contact, and the detection element can detect the distance between the second contact and the first contact in the first direction, so that the detection element can detect whether the second contact is in contact with the first contact; a user can conveniently and timely master the on-off state of the relay.