Patent ID: 11923672
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A protection system, comprising:
a first positive terminal;
a second positive terminal;
a first negative terminal;
a second negative terminal;
a first relay including a first contact portion and a second contact portion and configured to be opened and closed by contact and separation of the first contact portion and the second contact portion; and
a fuse including a first electrode and a second electrode, wherein
the first relay is connected between the first positive terminal and the second positive terminal,
the fuse is connected between the first negative terminal and the second negative terminal,
when an electric current exceeding a threshold current flows to the first relay, the first contact portion and the second contact portion are separated in the first relay at a first time at which the electric current flowing to the first relay exceeds the threshold current,
when the first contact portion and the second contact portion are separated, an arc discharge occurs between the first contact portion and the second contact portion,
an arc discharge occurs between the first electrode and the second electrode of the fuse at a second time later than the first time,
the arc discharge occurs at both of the first relay and the fuse and a difference in potential between the first electrode of the fuse and the second electrode of the fuse increases during a period between the second time and a third time later than the second time, and
the first positive terminal and the second positive terminal are disconnected at a fourth time later than the third time.