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Molded-case circuit breaker for DC

  • US 10,483,065 B2
  • Filed: 12/28/2017
  • Issued: 11/19/2019
  • Est. Priority Date: 12/30/2016
  • Status: Active Grant
First Claim
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1. A molded-case circuit breaker for DC that contains a plurality of interruption units within an outer casing, the DC circuit breaker comprising a two-unit connecting heater that connects fixed contacts of adjacent interruption units, the two-unit connecting heater being placed within the outer casing,wherein the adjacent interruption units are connected to each other as a series circuit,wherein the two-unit connecting heater is formed in a U-shape, and comprises:

  • a pair of head portions respectively connected to the fixed contacts of the adjacent interruption units;

    a pair of body portions extending downward from the head portions; and

    a leg portion connecting the pair of body portions, andwherein one of the pair of body portions has a tripping mechanism that detects an over-current in a circuit and interrupts the circuit,wherein a trip portion case for receiving the two-unit connecting heater and the tripping mechanism is placed within the outer casing, andwherein the trip portion case has a partition for insulation between the interruption units, and a cut groove is formed on a part of the partition to insert the leg portion.

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