摘要:
A control apparatus for controlling electrical switchgear, the control apparatus being designed such that it is capable of performing the following in succession: during an opening stage for opening the moving contact, causing the connection end for connection to the moving contact and provided on an output member to go from the point P1 to the point P2, under the effect of an opening mechanical spring moving a moving abutment element that drives the output member by abutment; during a re-cocking stage for re-cocking the spring, moving the moving abutment element under the effect of switching on a motor, while keeping the connection end at the point P2; and during a closure stage for closing the moving contact, causing the connection end to go from the point P2 to the point P1, also under the effect of switching on the motor.
摘要:
A control apparatus for controlling electrical switchgear, the control apparatus being designed such that it is capable of performing the following in succession: during an opening stage for opening the moving contact, causing the connection end for connection to the moving contact and provided on an output member to go from the point P1 to the point P2, under the effect of an opening mechanical spring moving a moving abutment element that drives the output member by abutment; during a re-cocking stage for re-cocking the spring, moving the moving abutment element under the effect of switching on a motor, while keeping the connection end at the point P2; and during a closure stage for closing the moving contact, causing the connection end to go from the point P2 to the point P1, also under the effect of switching on the motor.
摘要:
The invention relates to a control device for controlling electrical switchgear, the control device including an actuating arm (8) having a connection point (8b) suitable for being moved along a closed line (L) including points P1, P2, and P3: during an opening stage for opening the moving contact, under the effect of a mechanical spring (12), from point P1 to point P2; during a re-cocking stage for re-cocking the mechanical spring (12), under the effect of a motor (10) being switched on, and while keeping the moving contact in the open position, from point P2 to point P3; and during a closure stage for closing the moving contact, also under the effect of the motor being switched on, from point P3 to P1.
摘要:
A control device for controlling electrical switchgear such as a circuit breaker or the like includes an actuating arm having a connection point suitable for being moved along a closed line including points P1, P2 and P3. The connection point thus moves during an opening stage for opening the moving contact, under the effect of a mechanical spring from point P1 to point P2. It also moves during a re-cocking stage for re-cocking the mechanical spring under the effect of a motor being switched on, and while keeping the moving contact in the open position, from point P2 to point P3. It also moves during a closure stage for closing the moving contact, also under the effect of the motor being switched on, from point P3 to P1. In this manner it is possible to successively perform three distinct stages of putting the actuating arm in motion, between the instant at which the moving contact leaves its closed position and the instant at which it returns thereto after having occupied its open position. A re-cocking stage for re-cocking the mechanical spring that is distinct from the closing stage and from the opening stage for closing and opening the moving contact, is performed, with the opening stage to be performed merely by releasing the energy that has been previously accumulated by the spring.
摘要:
A hybrid current limiter comprising a first winding of non-superconducting conductive material having a large number of turns and electrically connected in series with a superconductoring coil of low self-inductance and placed in a cryostat, and a second winding of non-superconducting conductive material having a small number of turns, said second winding being closely coupled with said first winding in such a manner as to obtain low overall inductance, the second winding being connected in parallel with the series circuit constituted by the first winding and the superconducting coil.
摘要:
A device for controlling a circuit-breaker intended for opening and closing this electric power cut-off device comprising a mobile contact, this control device comprising a motor with a rotary output shaft and being connected to power supply means and actuating means transforming the output displacement of the motor into a displacement of the contact, this device also comprising a mechanical spring arrangement involved in opening and closing the contact. The actuation means include a set of jointed elements providing the connection of the rotary shaft and of the ring, and, in the closed position of the contact, the set of jointed elements is near a dead centre position, a so-called open dead centre, the opening spring being only able to drive it towards the open position upon moving past this dead centre during opening.
摘要:
The invention concerns a method for determining the reclose time of a circuit breaker on a three-phase high-voltage electric network after separation of contacts 7A, 8A, 7B, 8B, 7C, 8C in the presence of a fault on one of the three phases A, B or C, the determination of the reclose time comprising the following steps: measuring the voltages ULA0, ULBO and ULCO, measuring voltage USAO, determining the voltage USA0, USB0, and USCO, calculating the differences ULAB, ULAC and ULBC, calculating the differences USAB, USAC, and USBC, determining the reclose time on the basis of the voltage differences.
摘要翻译:本发明涉及一种用于在存在接触件7A,8A,7B,8B,7C,8C的情况下,在三相高压电网上确定断路器的重合闸时间的方法 在三相A,B或C之一中的故障,重新闭合时间的确定包括以下步骤:测量电压UL A0,UL&lt; BO&lt;&gt;和UL&lt; SUB > CO SUB>,测量电压US SUB>,确定电压US A0,US B0,和US < ,计算差异UL,AB,UL,AC和UL BC,计算出差异US AB,US 根据电压差确定重合时间。
摘要:
The current transformer comprises at least two partial circuits (CBn) each comprising a Rogowski type winding (Cn), each of said the partial circuits being made in the form of an angular portion of a complete circuit (CB) which surrounds at least one primary conductor (10, 10A, 10B, 10C) of the transformer over 360°. The winding (Cn) of each partial circuit (CBn) is constituted by a go winding (Cn0) and by a return winding (Cn1) which extend over the angular extent (θn) of the partial circuit (CBn). For each partial circuit (CBn), the go and return windings are electrically connected in series, both having turns wound in the same direction so as to form a single winding (Cn) which presents a pair of adjacent electrical terminations (T1n, T2n) connected to an acquisition system (7, 7′).
摘要翻译:电流互感器包括每个包括罗戈夫斯基型绕组(C SUB)的至少两个部分电路(CB SUB),每个所述部分电路以 完整电路(CB)的角部分,其围绕360°的变压器的至少一个主导体(10,10A,10B,10C)。 每个部分电路(CB n N)的绕组(C> N)由绕组(C> 0 0 is is is is is is is winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding winding (C n N n N),其在部分电路(CB)的角度范围内延伸。 对于每个部分电路(CB n N),绕组和返回绕组串联电连接,两个绕组绕相同方向缠绕,以便形成单个绕组(C> n) SUB>),其呈现连接到采集系统(7,7')的一对相邻的电气终端(T 1 N 2,T 2n 2 N)。
摘要:
The method is intended for use in a step-down high tension current measuring apparatus using the Faraday effect and including a Sagnac interferometer having an optical loop constituted by a fiber (47) surrounding the high tension conductor (11) conveying the alternating current to be measured and terminating at an integrated optical circuit (43) which delivers an output light beam to an electronic circuit with the optical power of the light beam having a component in its spectrum at a frequency which is a sinusoidal function of the phase difference generated by the Faraday effect, with the coefficient of proportionality being referred to as a scale factor. The method consists in periodically updating the scale factor used for interpreting measurements on the basis of D.C. components in the output signal from the interferometer which appear in response to two successive disturbances which modify the Faraday effect and which are caused by means of a test direct current taking two different successive values and applied to auxiliary coils (44, 45).
摘要:
The current transformer comprises at least two partial circuits (CBn) each comprising a Rogowski type winding (Cn), each of said the partial circuits being made in the form of an angular portion of a complete circuit (CB) which surrounds at least one primary conductor (10, 10A, 10B, 10C) of the transformer over 360°. The winding (Cn) of each partial circuit (CBn) is constituted by a go winding (Cn0) and by a return winding (Cn1) which extend over the angular extent (θn) of the partial circuit (CBn). For each partial circuit (CBn), the go and return windings are electrically connected in series, both having turns wound in the same direction so as to form a single winding (Cn) which presents a pair of adjacent electrical terminations (T1n, T2n) connected to an acquisition system (7, 7′).