US 2019/0097409 A1 · CIRCUIT INTERRUPTER WITH GROUND FAULT CURRENT TRANSFORMER

Abstract

A circuit interrupter including a first set of separable contacts, a second set of separable contacts, a first operating mechanism structured to open the first set of separable contacts, a second operating mechanism structured to open and close the second set of separable contacts, and an electronic trip unit including a routine structured to detect a fault condition and a type of the fault condition, to control the second operating mechanism to open the second set of separable contacts in response to detecting a first type of fault condition, and to control the second operating mechanism to close the second set of separable contacts a predetermined amount of time after controlling the second operating mechanism to open the second set of separable contacts.

Claims20

Dependent claims

A circuit interrupter comprising:

a first line conductor;
a second line conductor;
separable contacts;
an operating mechanism structured to trip open the separable contacts;
a trip circuit structured to cause the operating mechanism to trip open the separable contacts;
a ground fault current transformer having an oblong shape and being disposed around the first and second line conductors, wherein the ground fault current transformer is structured to sense a ground fault current from current flowing through the first and second line conductors;
and
a processor structured to detect a ground fault based on the ground fault current sensed by the ground fault current transformer and to output a signal to cause the trip circuit to cause the operating mechanism to trip open the separable contacts in response to detecting the ground fault.

5 more elements

A circuit interrupter comprising:

a first line conductor;
a second line conductor;
separable contacts;
an operating mechanism structured to trip open the separable contacts;
a trip circuit structured to cause the operating mechanism to trip open the separable contacts;
a ground fault current transformer having a first winding and a second winding and being disposed around the first and second line conductors, wherein the ground fault current transformer is structured to sense a ground fault current from current flowing through the first and second line conductors using the first winding;
and
a processor structured to detect a ground fault based on an output of the first winding and to output a signal to cause the trip circuit to cause the operating mechanism to trip open the separable contacts in response to detecting the ground fault, and wherein the processor is structured to, and wherein the processor is structured to use the second winding to perform a ground fault test.

5 more elements

Dependencies are inferred from the claim text.

Circuit interrupter with ground fault current transformer

Life of this patent

Circuit interrupter with ground fault current transformer

Life of this patent

Abstract

Claims20