PHASE LOSS DETECTION CIRCUIT INCLUDING TRANSIENT PROTECTION
    31.
    发明公开
    PHASE LOSS DETECTION CIRCUIT INCLUDING TRANSIENT PROTECTION 失效
    相位损失检测电路,包括瞬态保护

    公开(公告)号:EP0336943A4

    公开(公告)日:1991-07-17

    申请号:EP88908844

    申请日:1988-09-16

    申请人: SQUARE D COMPANY

    CPC分类号: H02H3/253 H02H1/04

    摘要: In phase loss detection circuits a false indication can occur doing the starting, stopping and severe load transitions of a three-phase motor. The present phase loss detection circuit solves this problem by using a circuit (33) to detect the lost of a phase, a comparator (25), a changing capacitor (C5), a peak detection (21) and an overload voltage integrator (38), all of which provide a positive indication of either a phase loss or overload condition. The present phase loss circuit including transient protection which may be used with three-phase motors in a three-phase electrical system.

    DETECTION DE PERTE DE NEUTRE OU DE PHASE
    32.
    发明公开

    公开(公告)号:EP4300113A1

    公开(公告)日:2024-01-03

    申请号:EP23182068.9

    申请日:2023-06-28

    IPC分类号: G01R31/54 H02H3/253

    摘要: Procédé de surveillance d'un réseau polyphasé (6), comprenant les étapes, répétées régulièrement, de :
    - acquérir des mesures de tensions réalisées par des capteurs de tension d'un équipement électrique, et produire des valeurs courantes de paramètres électriques ;
    - accéder à une table de référence (20) comprenant une liste de configurations de connexion associées chacune à une combinaison distincte de valeurs de référence desdits paramètres électriques, la liste de configurations de connexion comprenant des configurations correspondant chacune à une combinaison d'états de connexion pour chaque phase (P1, P2, P3) et pour le neutre (N) ;
    - mettre en œuvre un algorithme exploratoire, destiné à explorer la table de référence (20) pour identifier la configuration de connexion en cours.

    POWER SUPPLY CIRCUIT, CONTROL METHOD, AND PROGRAM

    公开(公告)号:EP3499697A1

    公开(公告)日:2019-06-19

    申请号:EP18210123.8

    申请日:2018-12-04

    摘要: A power supply circuit (1) including:
    a three-phase AC power supply (10) that includes a first terminal, a second terminal and a third terminal corresponding to three phases;
    a rectifier circuit (20) configured to rectify power of the three-phase AC power supply;
    a capacitor (C1) configured to smooth an output voltage of the rectifier circuit;
    a first switch (SW2) configured to switch connection and disconnection of the rectifier circuit and the first terminal;
    a second switch (SW3) configured to switch connection and disconnection of the rectifier circuit and the second terminal;
    a third switch (SW4) configured to switch connection and disconnection of the rectifier circuit and the third terminal;
    a fourth switch (SW1) and an inrush current suppression circuit (Rl) which are connected together in series and are provided in parallel with the first switch;
    a control unit (40) which is configured to cause the capacitor to be fully charged by performing control of what to bring the fourth switch and one of the second switch and the third switch into a closed state, and to bring the first switch and the other one of the second switch and the third switch into an open state; and
    a determination unit configured to determine an open-phase in the three-phase AC power supply on the basis of an output voltage of the rectifier circuit in each state of the first switch, the second switch, the third switch, and the fourth switch controlled by the control unit.

    CIRCUIT BREAKER
    38.
    发明授权
    CIRCUIT BREAKER 有权
    电路断路器

    公开(公告)号:EP1155487B1

    公开(公告)日:2008-08-27

    申请号:EP00902533.9

    申请日:2000-01-24

    申请人: Lam, Sheirchun

    发明人: Lam, Sheirchun

    CPC分类号: H02H3/334 H02H3/253

    摘要: A circuit breaker (10) for use in a power/load circuit formed by a three-phase AC power supply (11) and a load (12) connected to the power supply (11) by means of three live power lines (R-R', S-S' & T-T'). The circuit breaker (10) comprises a tripping circuit (60) including switches (SW1) connected in series with the respective power lines facing the power supply (11), a transformer (T1) having at least three balanced primary windings (P1 to P3) connected subsequently in series along the respective power lines and a secondary winding (S1), and a voltage comparator (50) connected to the secondary winding (S1) for comparing a voltage induced in the transformer (T1) with a reference voltage and then in the event of a leakage fault providing a tripping signal for the tripping circuit (60) to open the switches (SW1). A circuit path (X) is provided, which has a combined voltage sensor/comparator (30) and extends across opposite sides and externally of the transformer (T1) for sensing and comparing two phase-to-phase voltages with each other and then in the event of a voltage imbalance fault simulating a leakage fault condition for the transformer (T1) to detect and the voltage comparator (50) to provide a tripping signal.

    摘要翻译: 一种用于由三相交流电源(11)和负载(12)构成的电源/负载电路中的断路器(10),负载(12)通过三条有功电源线(R- R',SS'和T-T')。 断路器(10)包括具有与面对电源(11)的各个电力线串联连接的开关(SW1)的跳闸电路(60),具有至少三个平衡初级绕组(P1至P3)的变压器 ),其沿着各自的电力线和次级绕组(S1)串联连接;以及电压比较器(50),连接到次级绕组(S1),用于将变压器(T1)中感应的电压与参考电压进行比较,然后 在泄漏故障的情况下为脱扣电路(60)提供脱扣信号以断开开关(SW1)。 提供电路路径(X),其具有组合的电压传感器/比较器(30)并且跨过变压器(T1)的相对侧和外部延伸,用于感测并相互比较两个相间电压,然后进入 模拟变压器(T1)检测泄漏故障状态的电压不平衡故障以及电压比较器(50)提供跳闸信号的事件。

    PHASE FAILURE DETECTOR AND A DEVICE COMPRISING THE SAME
    39.
    发明授权
    PHASE FAILURE DETECTOR AND A DEVICE COMPRISING THE SAME 有权
    相故障检测器和包括其的装置

    公开(公告)号:EP1616379B1

    公开(公告)日:2006-08-02

    申请号:EP04732631.9

    申请日:2004-05-13

    申请人: ABB Oy

    发明人: MIETTINEN, Erkki

    IPC分类号: H02H3/253

    CPC分类号: H02H3/253

    摘要: Tässä julkaisussa on kuvattu vaihevahti (1) monivaiheista sähkönsyöttöverkkoa varten. Vaihevahti (1) käsittää kutakin vaihetta (2) varten ilmaisupiirin (3), jolla on ensimmäinen kytkentäpiste (4) valvottavaan vaiheeseen (2) kytkemistä varten sekä toinen kytkentäpiste (5), joka on yhdistetty ilmaisupiirien yhteiseen kytkentäpisteeseen (9). Ilmaisupiirit (3) puolestaan käsittävät kapasitiiviset jännitteenjakoelimet, jotka on sijoitettu ensimmäisen (4) ja toisen (5) kytkentäpisteen väliin ja joiden avulla jännite jaetaan ja syötetään alennettuna liipaisu- ja ilmaisupiirille, joka on sovitettu tuottamaan ilmaisupulssi alennetun jännitteen saavuttaessa liipaisutason.

    摘要翻译: 本出版物描述了多级供电网络的相位监视器(1)。 步骤防护件(1)包括,对于每个相(2),检测电路(3),其具有的第一连接点(4)到(2),用于连接和第二连接点(5),其连接到检​​测电路的公共连接点被监视阶段(9)。 反过来检测电路(3)包括被设置在所述第一(4)和第二(5)的连接点之间,并通过该电压被分压并馈电容性分压器的装置,由所述触发和检测器电路,其适于以产生降低的电压的检测脉冲达到触发电平降低。

    Leiterunterbrechungs-Schutzschaltung
    40.
    发明公开
    Leiterunterbrechungs-Schutzschaltung 审中-公开
    头断保护电路

    公开(公告)号:EP1353428A3

    公开(公告)日:2006-02-15

    申请号:EP03002626.4

    申请日:2003-02-10

    申请人: Heinrich Kopp AG

    IPC分类号: H02H5/10 H02H3/253

    CPC分类号: H02H5/105 H02H3/253

    摘要: Leiterunterbrechungs- Schutzschaltung mit: einer Auslösespule (9) zum Auslösen eines elektrischen Kontaktes, in Abhängigkeit eines durch die Auslösespule (9) hindurchfließenden Halte-Spulenstromes (I H ); und einer Überspannungsschutzeinrichtung (14, 33) zum Schützen der dazu parallelliegenden Auslösespule (9) vor Überspannungen und / oder Überströmen; wobei der bei einer Unterbrechung eines Leiters (4, 6) abfallende Halte-Spulenstrom (I H ) über die Auslösespule (9) einen Schutzschalter (7) auslöst.