US 2025/0046547 A1 · SWITCHING DEVICE

Abstract

A switching device includes: a first contact; a second contact; and a fault detection circuit. The second contact includes a fixed contactor and a movable contactor. When the second contact is energized due to an operation of opening the first contact, the movable contact is separated from the fixed contact by an electromagnetic force generated by a flow of currents in opposite directions through the pair of current-carrying electrodes, and a discharge switch is formed between the movable contact and the fixed contact that are separated. The switching device further includes: a first arc runner electrically connected to the fixed contactor for driving, by an electromagnetic force, arc discharge that occurs when the second contact is opened; and a second arc runner electrically connected to the movable contactor.

Claims12

Dependent claims

A switching device comprising:

a first contact;
a second contact provided in parallel with the first contact;
a discharge switch provided in parallel with the second contact and energized only when discharge occurs;
and
a fault detection circuit to perform an operation of opening the first contact when a fault is detected, wherein
the discharge switch has a function of increasing resistance, and
the second contact is opened when energized, and discharge that occurs when the second contact is opened is driven to the discharge switch, whereby a current-carrying path is switched from the second contact to a circuit having the discharge switch, further comprising:
a current-limiting resistor provided in parallel with the first contact and the second contact;
and
an opening operation circuit connected in series with the current-limiting resistor for maintaining opening of the second contact while the second contact is energized after being opened.

7 more elements

Dependencies are inferred from the claim text.

Switching device

Life of this patent

Switching device

Life of this patent

Abstract

Claims12