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1. 发明公开

EP0185887A2 A method and device for locating a ground fault on a coil-shaped electrical conductor 失效
标题翻译：方法和电路，用于确定在线圈状导体的决定。
公开(公告)号：EP0185887A2
公开(公告)日：1986-07-02
申请号：EP85113589.7
申请日：1983-08-05
申请人： Smalley, Daniel Scott
发明人： Smalley, Daniel Scott
IPC分类号： G01R31/08 , H05B6/28
CPC分类号： G01R31/025 , G01R31/08 , H05B6/28
摘要： A method and device for locating a ground fault in a conductor of non-linear impedance is provided. This may be used with an indication furnace, in which the location of a ground fault on the coil (14) is determined by measuring an electrical characteristic at a first position, with respect to ground, measuring the characteristic between the first position and a second position, and computing the ratio. The ratio is corrected by means of a look-up table to compensate for the variations in impedance along the coils length. A graphic representation of the furnace and the location of the fault is also provided.
摘要翻译：提供了一种用于在非线性阻抗的导体定位的接地故障的方法和装置。这可以用指示炉的故障，其中的接地对线圈（14）的位置是确定的由在第一位置处电特性的测量，相对于地，测量所述第一位置和第二之间的特性开采中使用位置，并且计算所述比率。比是由查找表来校正，以补偿沿着长度线圈阻抗的变化。因此炉中，并将故障的位置的图形表示被提供。

2. 发明公开

EP0185887A3 A method and device for locating a ground fault on a coil-shaped electrical conductor 失效
标题翻译：一种用于定位线圈形导体的接地故障的方法和装置
公开(公告)号：EP0185887A3
公开(公告)日：1988-02-03
申请号：EP85113589
申请日：1983-08-05
申请人： Smalley, Daniel Scott
发明人： Smalley, Daniel Scott
IPC分类号： G01R31/08 , H05B06/28
CPC分类号： G01R31/025 , G01R31/08 , H05B6/28
摘要： A method and device for locating a ground fault in a conductor of non-linear impedance is provided. This may be used with an indication furnace, in which the location of a ground fault on the coil (14) is determined by measuring an electrical characteristic at a first position, with respect to ground, measuring the characteristic between the first position and a second position, and computing the ratio. The ratio is corrected by means of a look-up table to compensate for the variations in impedance along the coils length. A graphic representation of the furnace and the location of the fault is also provided.
摘要翻译：使用包括连接在线圈两端连接的第一电位变压器和连接在线圈的一端与电接地之间的第二电位变压器的计算机监视器来研究接地故障的方法，特别是无铁心感应炉的方法。沿着线圈长度的接地故障的相对位置是通过计算变压器输出的比例来确定的。监视器还包括线圈电源线中的第一电流互感器和具有熔池接地的第二电流互感器。通过计算线圈和接地电流之间的相位差来检测内部接地故障。还产生炉的图示，以说明接地故障相对于线圈的匝和轭的位置。显示器还通过确定熔体体积来计算衬套磨损，这与熔体浴电阻成反比，而熔池的电阻又与线圈电阻成正比。如果被监测的炉子设有多个线圈，则在与故障线圈相关联的变压器呈现基本上非零的输出时，差分电流互感器连接在每个线圈两端以检测故障接地线圈。

3. 发明授权

EP0103394B1 Methods of investigating ground faults particularly on induction furnaces 失效
标题翻译：调查地面特别是感应炉故障的方法
公开(公告)号：EP0103394B1
公开(公告)日：1986-10-08
申请号：EP83304560.2
申请日：1983-08-05
申请人： Smalley, Daniel Scott
发明人： Smalley, Daniel Scott
IPC分类号： G01R31/08 , H05B6/28
CPC分类号： G01R31/025 , G01R31/08 , H05B6/28

4. 发明公开

EP0103394A1 Methods of investigating ground faults particularly on induction furnaces 失效
标题翻译：特别是在感应炉上研究接地故障的方法
公开(公告)号：EP0103394A1
公开(公告)日：1984-03-21
申请号：EP83304560.2
申请日：1983-08-05
申请人： Smalley, Daniel Scott
发明人： Smalley, Daniel Scott
IPC分类号： G01R31/08 , H05B6/28
CPC分类号： G01R31/025 , G01R31/08 , H05B6/28
摘要： @ Methods of investigation ground faults, particularly on coreless induction furnaces, using a computerised monitor which includes a first potential transformer connected across the coil and second potential transformer connected between one end of the coil and an electric ground. The relative location of a ground fault along the length of the coil is determined by computing the ratio of the transformer outputs. The monitor further includes a first current transformer in the coil power line and a second current transformer with melt bath ground. Internal ground faults are detected by computing the phase difference between the coil and ground currents. A graphic representation of the furnace is also generated to illustrate the location of the ground fault with respect to turns and yokes of the coil. The monitor also calculates liner wear by determining melt bath volume, which is inversely proportional to melt bath resistance, which in turn is proportional to coil resistance. If the furnace being monitored is provided with more than one coil, a differential current transformer is connected across each coil to detect the fault grounded coil when the transformer associated with the faulted coil exhibits a substantially non-zero output.
摘要翻译： @调查接地故障的方法，特别是在无芯感应炉上，使用计算机监视器，包括连接在线圈两端的第一个电压互感器和连接在线圈一端和电气地之间的第二个电压互感器。通过计算变压器输出的比率来确定接地故障沿线圈长度的相对位置。监视器还包括线圈电力线中的第一电流互感器和熔池浴接地的第二电流互感器。通过计算线圈和接地电流之间的相位差来检测内部接地故障。还会生成熔炉的图形表示，以说明接地故障相对于线圈的线圈和磁轭的位置。监测器还通过确定熔体浴体积来计算衬管磨损，该熔体体积与熔体浴电阻成反比，其又与线圈电阻成正比。如果被监测的炉子设有多于一个线圈，则当与故障线圈相关联的变压器呈现基本上非零输出时，在每个线圈上连接差动电流互感器以检测故障接地线圈。

5. 发明公开

EP0185886A2 A method and device for detecting an internal ground fault on the coil of an induction furnace 失效
标题翻译： Verfahren und Schaltung zur Feststellung vonErdschlüssenin der Spule eines Induktionsofens。
公开(公告)号：EP0185886A2
公开(公告)日：1986-07-02
申请号：EP85113588.9
申请日：1983-08-05
申请人： Smalley, Daniel Scott
发明人： Smalley, Daniel Scott
IPC分类号： G01R31/08 , H05B6/28
CPC分类号： G01R31/025 , G01R31/08 , H05B6/28
摘要： A method and device for detecting an internal ground fault in the coil of an induction furnace is described. The voltage or current across the coil is monitored and this is compared with the current passing through the melt bath. The companion between these preferably by determining the phase difference, indicates whether a ground fault exists. A graphic representation of the furnace is also generated to illustrate the location of the ground fault with respect to the turns and yokes of the coil.
摘要翻译：描述了用于检测感应炉的线圈中的内部接地故障的方法和装置。监测线圈两端的电压或电流，并将其与通过熔池的电流进行比较。这些优选地通过确定相位差之间的伴随来表示是否存在接地故障。还产生炉的图示，以说明接地故障相对于线圈的匝和轭的位置。

6. 发明专利

DE3366747D1 METHODS OF INVESTIGATING GROUND FAULTS PARTICULARLY ON INDUCTION FURNACES 未知
公开(公告)号：DE3366747D1
公开(公告)日：1986-11-13
申请号：DE3366747
申请日：1983-08-05
申请人： SMALLEY DANIEL SCOTT
发明人： SMALLEY DANIEL SCOTT
IPC分类号： F27B14/06 , F27D21/00 , G01R31/02 , G01R31/08 , H05B6/28
摘要： Methods of investigation ground faults, particularly on coreless induction furnaces, using a computerised monitor which includes a first potential transformer connected across the coil and second potential transformer connected between one end of the coil and an electric ground. The relative location of a ground fault along the length of the coil is determined by computing the ratio of the transformer outputs. The monitor further includes a first current transformer in the coil power line and a second current transformer with melt bath ground. Internal ground faults are detected by computing the phase difference between the coil and ground currents. A graphic representation of the furnace is also generated to illustrate the location of the ground fault with respect to turns and yokes of the coil. The monitor also calculates liner wear by determining melt bath volume, which is inversely proportional to melt bath resistance, which in turn is proportional to coil resistance. If the furnace being monitored is provided with more than one coil, a differential current transformer is connected across each coil to detect the fault grounded coil when the transformer associated with the faulted coil exhibits a substantially non-zero output.

7. 发明专利

AT22733T 未知
公开(公告)号：AT22733T
公开(公告)日：1986-10-15
申请号：AT83304560
申请日：1983-08-05
申请人： SMALLEY DANIEL SCOTT
发明人： SMALLEY DANIEL SCOTT
IPC分类号： F27B14/06 , F27D21/00 , G01R31/02 , G01R31/08 , H05B6/28
摘要： Methods of investigation ground faults, particularly on coreless induction furnaces, using a computerised monitor which includes a first potential transformer connected across the coil and second potential transformer connected between one end of the coil and an electric ground. The relative location of a ground fault along the length of the coil is determined by computing the ratio of the transformer outputs. The monitor further includes a first current transformer in the coil power line and a second current transformer with melt bath ground. Internal ground faults are detected by computing the phase difference between the coil and ground currents. A graphic representation of the furnace is also generated to illustrate the location of the ground fault with respect to turns and yokes of the coil. The monitor also calculates liner wear by determining melt bath volume, which is inversely proportional to melt bath resistance, which in turn is proportional to coil resistance. If the furnace being monitored is provided with more than one coil, a differential current transformer is connected across each coil to detect the fault grounded coil when the transformer associated with the faulted coil exhibits a substantially non-zero output.

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