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公开(公告)号:US4998067A
公开(公告)日:1991-03-05
申请号:US418572
申请日:1989-10-10
申请人: James D. Puckett , Edward Weiss
发明人: James D. Puckett , Edward Weiss
IPC分类号: G01R31/327
CPC分类号: G01R31/3277 , G01R1/04
摘要: Portable testing apparatus for low current circuit breakers which enables short circuit and constant current tests to be conducted at the breaker panel. A first container includes a parallel array of resistive loads each under control of a corresponding relay. Low voltage control circuitry is provided in a second container and permits variation of the load appearing in series with the circuit breaker under test. The short circuit test can be performed at the first container which operates at the line voltage.
摘要翻译: 用于低电流断路器的便携式测试装置,可在断路器面板上进行短路和恒流测试。 第一容器包括各自在相应的继电器的控制下的并联的电阻性负载阵列。 低压控制电路设置在第二容器中,并允许与被测断路器串联出现的负载变化。 短路测试可以在以线路电压工作的第一个容器上进行。
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2.
公开(公告)号:US5535087A
公开(公告)日:1996-07-09
申请号:US181854
申请日:1994-01-14
摘要: A circuit for reducing the effects of unpredictable changes in power supply and variations in loading on sensitive equipment, e.g. CT scanning system, to reduce inaccurate readings and protect equipment. The circuit utilizes a network of variable reactances controlled either by manual switches or by a microprocessor receiving inputs from a plurality of monitoring locations within the network.
摘要翻译: 用于减少电源不可预测的变化和敏感设备上的负载变化的影响的电路,例如, CT扫描系统,减少不准确的读数并保护设备。 该电路利用由手动开关或微处理器接收来自网络内的多个监测位置的输入控制的可变电抗网络。
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