Circuit breaker having seperate restrained and unrestrained zone selective interlock setting capability

一种断路器、无限制的技术，应用在区域选择性互锁的系统领域，能够解决断开等问题

Inactive Publication Date: 2009-10-21
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since both the ACB and the MCCB react to a fault condition, it may be the case that an electrical fault causes both the ACB and the MCCB to open their respective contact assemblies

Method used

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  • Circuit breaker having seperate restrained and unrestrained zone selective interlock setting capability
  • Circuit breaker having seperate restrained and unrestrained zone selective interlock setting capability
  • Circuit breaker having seperate restrained and unrestrained zone selective interlock setting capability

Examples

Experimental program
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Embodiment Construction

[0023] figure 1 System 20 is shown connected to a circuit breaker within device 28 serving a protected circuit of load 22 . A power source 24 , such as a utility grid, is connected to a circuit breaker 26 , for example. Circuit breaker 26 is typically located at the service entrance of equipment 28 . In larger installations, such as in this exemplary embodiment, circuit breaker 26 is an air circuit breaker ("ACB") with different branches connected from power source 24 to the three electrical phases and distributing power to the installation. functions and load capacity. Electrical load 22 may be any type of load including, but not limited to, lighting systems, process motors, data centers, heating and ventilation systems, and the like.

[0024] Downstream of the ACB 26 , the protected circuit splits into a plurality of branches 30 , 32 , 34 . These branches may include additional power distribution and control equipment such as transformers 36, 38 to adapt the electrical c...

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PUM

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Abstract

The present invention relates to a circuit breaker having separate restrained and unrestrained zone selective interlock setting capability. A circuit breaker system and method having zone selective interlock features with separate restrained and unrestrained setting capability is provided. The system and method include the transmission of a selective interlock signal from a downstream circuit breaker to an upstream circuit breaker in the event of a fault condition. The upstream circuit breaker upon receipt of this signal changes the tripping response of the second circuit breaker to a restrained mode. The circuit breakers include features enabling the user to modify and adjust both the restrained and unrestrained trip curves associated with both the restrained and unrestrained modes of operation.

Description

technical field [0001] The subject matter disclosed herein relates to methods for providing zone-selective interlocks between circuit breakers in an electrical distribution system. In particular, the subject matter disclosed herein relates to a system for zone selective interlock between a downstream circuit breaker and an upstream circuit breaker during a momentary trip condition. Background technique [0002] Air circuit breakers are commonly used in power distribution systems. A typical air circuit breaker ("ACB") includes an assembly of components used to connect a power source to an electrical energy consumer called a load. The circuit to which the circuit breaker is connected is referred to herein as a protected circuit. These parts are called main contact assemblies. In this assembly, the main contacts are typically either open, interrupting the path of electrical energy transfer from the source to the load, or closed, providing a path for electrical energy transfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08
CPCH02H7/262H02H7/30
Inventor N·B·维森特M·F·库勒B·P·小伦哈特M·E·瓦尔德斯
Owner ABB (SCHWEIZ) AG
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