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Breaking device for instantaneous overload

A technology for circuit breakers and circuit breakers to trip, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., and can solve the problem that the system cannot provide delay time.

Inactive Publication Date: 2004-09-08
CIRCUIT BREAKER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system does not provide sufficient delay time before the second fuse blows in a relatively long overload condition
Furthermore, in the event of an overload, this system requires at least one fuse to be replaced

Method used

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  • Breaking device for instantaneous overload
  • Breaking device for instantaneous overload
  • Breaking device for instantaneous overload

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] see figure 1 , the first circuit breaker 10 is located between the load and the power source. The circuit breaker has a set of primary contacts 12 and a second set of changeover contacts 14 . When the primary contact 12 is closed, the circuit breaker supplies power to the load in a conventional manner. In this state, the changeover contact 14 is open.

[0019] If an overload condition occurs, the first circuit breaker 10 will trip, opening contacts 12 and closing changeover contacts 14 at the same time. This diverts current from the source to supply the load through the second circuit breaker 16 . The second circuit breaker 16 will also trip if the overload condition persists for a predetermined period of time. The time delay in tripping the second circuit breaker, combined with the time delay in switching current from the first circuit breaker 10 to the second circuit breaker 16, allows sufficient time for the transient overload condition to stabilize in most cases...

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PUM

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Abstract

A breaking device for instantaneous overload, includrd a first circuit breaker, located between the load and the power supply. The circuit breaker has a group of basic contacts and a second group of switch contacts. When the basic contacts are closed, the switch contacts are disconnected. If th overload occurs, the first circuit breaker trips, disconnecting the basic contacts and closing the switch contacts at the same time. The curent come from the power supply is switched to pass through the second circuit breaker to supply to the load. If the overload condition persists, achieving a preset time, the second circuit breaker will trip too.

Description

technical field [0001] The invention relates to a circuit breaker arrangement using at least two circuit breakers arranged to ensure continuity of power supply even after one circuit breaker has tripped. Background technique [0002] In some specific applications, it is hoped that the continuous power supply to the load can be guaranteed even under the condition of instantaneous overload. In prior art systems, two fuses are used with a simple circuit that switches to supplying power through the second fuse if the first fuse blows in an overload condition. This second fuse will also blow if the overload condition persists. However, this system does not provide sufficient delay time before the second fuse blows in a relatively long overload situation. Furthermore, this system requires at least one fuse to be replaced in the event of an overload. Contents of the invention [0003] It is an object of the present invention to provide an alternative system to ensure continuou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/093
Inventor M·F·V·里贝罗C·A·弗雷拉J·保罗
Owner CIRCUIT BREAKER IND