Revolving double breakpoints structure of low-voltage circuit breaker contact
A low-voltage circuit breaker and double-breakpoint technology, which is applied in the field of rotating double-breakpoint mechanism, can solve the problems of circuit breaker arc restrike and achieve the effect of suppressing arc restrike
Active Publication Date: 2012-05-02
EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD
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Problems solved by technology
[0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a low-voltage circuit breaker contact rotation double breakpoint structure, which reliably prevents the falling of the moving contact after being repelled by the electric repulsion, and solves the problem of breaking the circuit breaker. The problem of arc restrike during the process
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[0013] Such as Figure 1-3 As shown, the rotor 1 is a symmetrical structure up and down. In the axial middle part of the rotor 1, the contact 2 runs through the radial direction of the rotor 1 symmetrically. The rotor 1 and the contact 2 have the same central rotation axis 6. The rotor 1 and the contact 2 A waist-shaped hole is provided at the center, and the central rotating shaft 6 passes through the waist-shaped hole, so that the self-adjustment of the contact 2 in the waist-shaped hole can be ensured. The contact 2 rotates in the hollow slot of the rotor 1 with the central rotating shaft 6 as the axis, and the contact 2 can rotate freely between the closed position and the open position.
[0014] On the rotor 1 located on both sides of the contact 2, a pair of fixed rods 5 are arranged symmetrically with the central rotating shaft 6 as the axis. The fixed rods 5 are stationary relative to the rotor 1. The rod 4, the movable rod 4 can rotate relative to the contact 1. Two...
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The invention discloses a revolving double breakpoints structure of a low-voltage circuit breaker contact, wherein a pair of fixed rods is arranged on a rotor and axially symmetrical to the central rotation axis, a pair of movable rods is arranged beside the fixed rods and axially symmetrical to the central rotation axis; two pressure plates are on the two side faces of the contact in a contact manner and axially symmetrical to the central rotation axis, one end of each pressure plate is sleeved on the central rotation axis, the other end is fixed on one of the movable rods, the pressure plate is provided with a curve matched with the fixed rods; two springs are separately arranged on the upper end face and lower end face of the rotor, wherein one end of one spring is fixed on one fixed rod, the other end is fixed on one movable rod on the opposite side, one end of the other spring is fixed on the other movable rod and the other end of the other spring is fixed on the other fixed rod on the opposite side. The revolving double breakpoints structure of the invention adopts the limit function of the pressure plate to ensure the other end of the pressure plate to compress the contact and prevent the contact to revolve to the on-position so as to reach the aim of locking the contact and effectively restrain the phenomenon of arc reignition when the circuit breaker is broken.
Description
technical field [0001] The invention relates to a contact part of a low-voltage circuit breaker, in particular to a rotating double breakpoint mechanism of a moving contact part of a circuit breaker operating mechanism, which is driven to rotate by the operating mechanism of the circuit breaker. Background technique [0002] At present, the moving contact part of the molded case low-voltage circuit breaker is composed of a rotor, a contact, etc. The rod on the operating mechanism drives the rotor to rotate, and the rotation of the rotor realizes the opening and closing of the moving contact. When a short-circuit current occurs in the circuit breaker, the contacts will be repelled by the electrodynamic repulsion generated by the short-circuit current, generating an arc. The contact of the traditional low-voltage circuit breaker will fall back due to the pressure of the contact spring and the gravity of the contact itself after being repelled by the electric repulsion force, r...
Claims
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IPC IPC(8): H01H73/04
Inventor 朱未东江长生张海燕杨建国
Owner EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD