公开(公告)号：US09366698B2

公开(公告)日：2016-06-14

申请号：US14157655

申请日：2014-01-17

申请人： CHAUVIN ARNOUX

发明人： Philippe Legros ,  Thierry Rouillard

IPC分类号： G01R1/22 ,  G01R33/00 ,  G01R15/18 ,  G01R1/20 ,  G01R31/02

CPC分类号： G01R1/20 ,  G01R1/22 ,  G01R15/186 ,  G01R31/024

摘要： A clamp for measuring a ground loop current includes a first jaw secured to a fixed support and a second jaw pivotally mounted on the fixed support, and pivotable between a position closing the clamp and an open position, and an elastic element for returning the movable jaw to the closed position. The clamp includes a device scaling down the force required for opening the clamp, by application of the force to a trigger. The device is mounted between the elastic return element and the trigger, upon opening the clamp.

摘要翻译： 用于测量接地回路电流的夹具包括固定到固定支撑件的第一钳口和枢转地安装在固定支撑件上的第二钳口，并且可在关闭夹具和打开位置的位置之间枢转，以及用于使可动钳口返回的弹性元件 到关闭位置。 夹具包括通过将力施加到扳机来缩小打开夹具所需的力的装置。 打开夹具后，该装置安装在弹性返回元件和触发器之间。

公开(公告)号：US09417268B2

公开(公告)日：2016-08-16

申请号：US13724081

申请日：2012-12-21

申请人： CHAUVIN ARNOUX

发明人： Philippe Legros

IPC分类号： G01R19/00 ,  G01R25/00 ,  G01R27/00 ,  G01R27/20 ,  G06F17/12

CPC分类号： G01R19/0007 ,  G01R27/20 ,  G06F17/12

摘要： An earth clamp for testing contact voltage, comprising a measuring circuit formed of a voltage inducing transformer and a current measuring transformer, adapted to be mutually coupled by an earth conductor whose earth impedance is to be measured, a microcontroller to deliver an alternating voltage to the voltage inducing transformer and, in response, to receive a reference voltage generated in the earth conductor and an earth current iB+iF induced in the current measuring transformer, the microcontroller being configured to extract an amplitude E of the reference voltage, an amplitude IB and an amplitude IF of the earth current and a phase shift φ between the reference voltage and the loop current iB and to calculate the earth impedance Zb at a determined frequency, the microcontroller also computing the contact voltage Uc at said determined frequency by the product of the earth impedance times the amplitude IF.

摘要翻译： 用于测试接触电压的接地夹具，包括由电压感应变压器和电流测量变压器形成的测量电路，适于通过要测量接地阻抗的接地导体相互耦合，微控制器将交流电压传递到 并且作为响应，接收在接地导体中产生的参考电压和在电流测量变压器中感应的接地电流iB + iF，微控制器被配置为提取参考电压的振幅E，幅度IB和 接地电流的幅度IF和参考电压和回路电流iB之间的相移φ，并且以确定的频率计算接地阻抗Zb，微控制器还通过乘法器的乘积计算所述确定的频率处的接触电压Uc 接地阻抗乘以幅度IF。

公开(公告)号：US20140203799A1

公开(公告)日：2014-07-24

申请号：US14157655

申请日：2014-01-17

申请人： CHAUVIN ARNOUX

发明人： Philippe Legros ,  Thierry Rouillard

IPC分类号： G01R1/20 ,  G01R31/02

CPC分类号： G01R1/20 ,  G01R1/22 ,  G01R15/186 ,  G01R31/024

摘要： A clamp for measuring a ground loop current includes a first jaw secured to a fixed support and a second jaw pivotally mounted on the fixed support, and pivotable between a position closing the clamp and an open position, and an elastic element for returning the movable jaw to the closed position. The clamp includes a device scaling down the force required for opening the clamp, by application of the force to a trigger. The device is mounted between the elastic return element and the trigger, upon opening the clamp.

摘要翻译： 用于测量接地回路电流的夹具包括固定到固定支撑件的第一钳口和枢转地安装在固定支撑件上的第二钳口，并且可在关闭夹具和打开位置的位置之间枢转，以及用于使可动钳口返回的弹性元件 到关闭位置。 夹具包括通过将力施加到扳机来缩小打开夹具所需的力的装置。 打开夹具后，该装置安装在弹性返回元件和触发器之间。