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    • 3. 发明授权
    • Means for limiting the dynamic overreach in, for example, an impedance relay
    • 用于限制例如阻抗继电器中的动态超越的手段
    • US3890544A
    • 1975-06-17
    • US46098874
    • 1974-04-15
    • ASEA AB
    • CHAMIA MICHEL
    • H02H3/38H02H3/26
    • H02H3/382
    • For limiting the dynamic overreach in impedance relays, there is provided a first comparator for comparing the condition of two periodic alternating quantities which delivers a signal of a definite appearance when a primary condition is fulfilled, and a second comparator which delivers a signal when a secondary condition is fulfilled. The second condition is a limitation of the primary condition. The two comparators are connected to each other to transmit a tripping signal when the primary condition is fulfilled at two consecutive measuring opportunities and when the secondary condition is fulfilled at any measuring opportunity. The primary condition is theta 1
    • 为了限制阻抗继电器中的动态超越,提供了一种第一比较器,用于比较当满足主要条件时传递明确外观的信号的两个周期性交变量的条件;以及第二比较器,当次级 条件得到满足。 第二个条件是主要条件的限制。 当在两个连续的测量机会满足主要条件并且在任何测量机会满足次要条件时,两个比较器彼此连接以发送跳闸信号。 主要条件是θ1
    • 5. 发明授权
    • Arrangement for detecting the direction of a fault from a measuring point
    • 用于从测量点检测故障方向的布置
    • US3878460A
    • 1975-04-15
    • US41180673
    • 1973-11-01
    • ASEA AB
    • NIMMERSJO GUNNAR
    • H02H7/26G01R31/08H02H3/22H02H3/38
    • H02H7/265
    • In order to determine the direction of a fault in a power network from the measuring point, each phase of the line is provided with a detector part with a band exclusion filter for removing the part of a signal which has the operating frequency of the network, which signal is proportional to the current at the measuring point, and another band exclusion filter for removing the part of another signal which has the operating frequency of the network, which is proportional to the voltage at the measuring point. A directional detector is fed with the two filtered signals which contain substantially only transients. The output of the directional detector is connected to a tripping relay and a blocking relay.
    • 为了从测量点确定电力网络中的故障的方向,线路的每个相位都设置有具有带除滤波器的检测器部分,用于去除具有网络的工作频率的信号的一部分, 哪个信号与测量点处的电流成正比,另一个带除滤波器用于去除与测量点的电压成比例的具有网络工作频率的另一个信号的一部分。
    • 6. 发明授权
    • Method of punching sheet segments having substantially annular sector shape
    • 具有重大环形横截面形状的片段切割方法
    • US3854355A
    • 1974-12-17
    • US40372173
    • 1973-10-04
    • ASEA AB
    • ANEFALL G
    • B26F1/00B21D28/02B21D28/06B23D36/00H02K15/02B26F1/40
    • H02K15/024B21D28/06Y10T83/05Y10T83/051Y10T83/0577Y10T83/6582Y10T83/8742Y10T83/896
    • For punching sheet segments having substantially annular sector shape, with two radially directed sides, a sheet metal strip of constant width is fed through a punching device which punches out the segments of the desired shape one by one. The sheet metal strip has a width which is more than the air gap radius but less than twice the maximum outer radius of the core. The punching tool is punched in such a way that the cutting edge which forms one of the radially directed sides is parallel to and close to one longitudinal edge of the strip. The unpunched portion of the strip is coiled on a winder-recoiler. After the strip has been fed through in one direction, the position of the strip with respect to the punch (or vice versa) is reversed, and the strip is fed in the other direction through the punch, which punches out similar shaped pieces from the remaining portion of the strip.
    • 对于具有基本上环形扇形的冲压片段,具有两个径向指向的侧边,通过冲压装置进给具有恒定宽度的金属板条,该穿孔装置逐一冲出所需形状的段。 金属板条的宽度大于气隙半径但小于芯的最大外半径的两倍。 冲压工具被冲压成使得形成径向指向侧边之一的切削刃平行于并且靠近带的一个纵向边缘。 带材的未打碎部分卷绕在卷绕机上。 在条带沿一个方向进给之后,条带相对于冲头(或反之亦然)的位置被反转,并且条带沿另一个方向通过冲头进给,该冲头从相同的冲头上冲出相似的成形件 条的剩余部分。
    • 7. 发明授权
    • Mechanical brake for tap changers
    • 机械制动器
    • US3833096A
    • 1974-09-03
    • US38956473
    • 1973-08-20
    • ASEA AB
    • NORMAN S
    • F16D59/02F16D63/00F16D65/14H01H3/26H01H9/00
    • F16D65/18F16D59/02F16D63/00F16D2121/14F16D2125/64F16D2125/66F16D2125/70H01H3/26H01H9/0027
    • A mechanical brake for the driving device of a tap changer includes a brake disc and cooperating brake shoes. A control disc driven simultaneously with the brake disc has two parts of different radius, the higher parts of which can engage against a roller journalled on a lever which is pivoted on the shaft which controls the contact device supplying current to the driving motor. The roller carrying lever also has pivoted to it a link connected to a control rod which passes between the brake shoes and has thinner and thicker parts. Rollers journalled on the brake shoes engage this rod, so that when it is moved in either direction from a median position by the rocking of the lever it pushes the brake shoes apart and releases the braking action.
    • 用于分接开关的驱动装置的机械制动器包括制动盘和配合的制动蹄。 与制动盘同时驱动的控制盘具有不同半径的两个部分,其较高部分可以抵靠在轴上枢轴转动的转轴上的辊,该转轴控制向驱动电机提供电流的接触装置。 滚轮承载杆还具有连接到控制杆的连杆,该控制杆在制动蹄之间通过并且具有更薄和更厚的部件。 在制动蹄上安装的滚子接合该杆,使得当其通过杠杆的摇动从中间位置沿任一方向移动时,推动制动蹄分开并释放制动动作。