# US 2014/0151340 A1 · Arc Chute Arrangement for Arc Quenching in Electrical Switching Device

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- Number: US 2014/0151340 A1
- Document ID: US20140151340A1
- Status: Published application
- Kind: A1
- Application number: 13/693,167
- Filed: 2012-12-04
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Larsen & Toubro Limited
- Inventors: Deepak Nahata; Jibanesh Roy; Deepak M. Ochani
- Web page: https://patentgrep.com/patent/US20140151340A1

## CPC

- H01H 9/302: {wherein arc-extinguishing gas is evolved from stationary parts}
- H01H 9/345: {Mounting of arc chutes}
- H01H 9/362: {Mounting of plates in arc chamber}
- H01H 9/341: {Barrier plates carrying electrodes}
- H01H 2009/365: {using U-shaped plates}
- H01H 2009/367: {defining a recurrent path, e.g. the subdivided arc is moved in a closed path between each pair of splitter plates}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

An arc chute arrangement for arc quenching in electrical switching device, said arrangement comprising a plurality of deion plates, each said deion plates further comprising a pair of plates having an ablative material sandwiched therebetween; a lining means for holding said deion plates; wherein said deion plates having a chamfered profile at one corner to generate high magnetic field that drive the arc inside arc chute and said chamfered profile arranged alternatively thereby substantially lengthening the arc.

## Claims

### Claim 1

An arc chute arrangement for arc quenching in electrical switching device, said arrangement comprising:
a plurality of deion plates, each said deion plates further comprising at least a pair of plates joined through a resistive element and having an ablative material sandwiched therebetween;
a lining for holding said deion plates;
wherein said deion plates are made of same ferromagnetic material or optionally made of different magnetic materials whereby said materials are selected so as to provide substantially high arc running capacity and
wherein said deion plates comprising chamfered profile at its one corner to generate high magnetic field that drive the arc inside arc chute and said chamfered profile of two consecutive deion plates being arranged in an alternative relationship so that the arc forms a zig zag path resulting in substantially lengthening of the arc.

### Claim 2 (depends on 1)

Arrangement as claimed in claim 1 wherein said lining is made of substantially electrically insulating material.

### Claim 3 (depends on 1)

Arrangement as claimed in claim 1 wherein said resistive element being adapted to establish electrical connection between a pair of plates.

### Claim 4 (depends on 1)

Arrangement as claimed in claim 1 wherein said ablative material is configured to release electronegative gases during short circuit whereby said electronegative gases absorb charged particles from the arc.

### Claim 5 (depends on 1)

Arrangement as claimed in claim 1 wherein said deion plates are placed in substantial parallel configuration to generate magnetic blast effect during current flow.

### Claim 6 (depends on 1)

Arrangement as claimed in claim 1 wherein said deion plates configured to generate current loop thereby exerting force on the arc.

### Claim 7 (depends on 1)

Arrangement as claimed in claim 1 wherein said deion plates along with ablative material arranged together forming a stack assembly.