摘要:
Die Erfindung betrifft einen Sicherheitsschalter (1) zum Überwachen eines aus einem ortsfesten und einem bewegbaren Teil (Z1, Z2) bestehenden Zugangs (Z) eines Automatisierungssystems (R), wobei der Sicherheitsschalter (1) ein erstes Gehäuseteil (2) mit einer länglichen, vorzugsweise quaderförmigen, Form und ein zweites Gehäuseteil (3) mit einer zu dem ersten Gehäuseteil (2) formschlüssigen Form aufweist, das erste Gehäuseteil (2) ein erstes Magnetelement (2a) und das zweite Gehäuseteil (3) ein zweites Magnetelement (3a) aufweisen, das erste Gehäuseteil (2) ortsfest in dem ortsfesten Teil (Z1) des Zugangs (Z) angeordnet ist und das zweite Gehäuseteil (3) in dem bewegbaren Teil (Z2) des Zugangs (Z) angeordnet ist, so dass in einem geschlossenen Zustand des Zugangs (Z) sich die Magnetelemente (2a, 3a) gegenüberliegend befinden, die Magnetelemente (2a, 3a) miteinander magnetisch wirksam sind, und eine magnetische Zuhaltekraft messbar ist, wobei das erste Gehäuseteil (2) einen Signalempfänger (4) und eine Auswerteeinheit (6) und das zweite Gehäuseteil (3) einen Signalgeber (5) aufweisen oder vice versa, und an einem ersten Ende (E1) der länglichen Form des ersten bzw. des zweiten Gehäuseteils (2, 3) das erste bzw. das zweite Magnetelement (2a, 3a) vorgesehen ist und an einem zweiten Ende (E2) der länglichen Form des ersten bzw. des zweiten Gehäuseteils (2, 3) der Signalempfänger (4) bzw. der Signalgeber (5) vorgesehen ist und wobei das erste und zweite Gehäuseteil (2, 3) derart in den ortsfesten und bewegbaren Teilen (Z1, Z2) des Zugangs (Z) angeordnet sind, dass sich eine Längsachse (LA) des ersten und zweiten Gehäuseteils (2, 3) in einer horizontalen Lage befindet.
摘要:
An electrical switching apparatus (2;50;90;100) includes a ferromagnetic frame (8) having first (110) and opposite second (112) portions, a ferromagnetic core (33) disposed therebetween, a permanent magnet (12) disposed on the first portion, a first tapered portion (113) on the opposite second portion; a coil (4) disposed about the core; and a ferromagnetic or magnetic armature (10) including a first portion (114), an opposite second portion (116) and a pivot portion (118) pivotally disposed on the core between the portions of the armature. The armature opposite second portion has a complementary second tapered portion (38) therein. In a first armature position, the armature first portion is magnetically attracted by the permanent magnet and the first and second tapered portions are moved apart with the coil de-energized. In a second armature position, the armature opposite second portion is magnetically attracted by the opposite second portion of the frame and the first tapered portion is moved into the second tapered portion with the coil energized.
摘要:
A safety switch for a safety circuit, the safety switch comprising a moveable magnet moveably located between a fixed contact and a fixed magnet, a movable contact being fixed to the moveable magnet, wherein the safety switch further comprises coils located adjacent to the moveable magnet, the coils being arranged such that when they are energised they push the moveable magnet towards the fixed contact such that the movable contact presses against the fixed contact, and the fixed magnet being arranged such that when the coils are not energised the moveable magnet and the moveable contact are pulled away from the fixed contact.
摘要:
The invention concerns an electrical switching device comprising at least one first part (30) including at least one first magnetizable element (31) and one first contact zone (32) associated with said first magnetizable element, and at least one mobile second part (33) including at least one second magnetic element (34) and one second contact zone (35) associated with said second magnetic element. The first or the second magnetic element comprises at least one part with permanent magnetization to maintain the first electrical contact (36) closed and exert a contact pressure between the first and second zones (32, 35) when the mobile part is in a first stable position. The electromagnetic relay and/or electrical apparatus comprise electric contact inputs (62A) and control inputs (62B) connected to a switching device including electromagnetic operating coils (52, 53).
摘要:
The invention relates to a load-disconnecting switch with a permanent magnet holding circuit. When excited, a coil (5) generates a magnetic flux that is opposite to the flux of the permanent magnet (9). The armature (6) is pre-stressed in an opened position by an armature spring (10) so that the armature spring (10) detaches the armature (6) from the core (7) of the magnet system, opening said armature, when a defined excitation is exceeded, and thereby disconnecting a switch contact (15) from a stationary contact (16). The load-disconnecting switch can be switched on again by means of a spring clip (12) that acts on the armature (6).
摘要:
A relay circuit includes a power supply to apply an AC input line voltage to the relay circuit, a relay coil and at least one pair of contacts actuated by the relay coil. A zero cross detection circuit and a control logic circuit for the relay circuit are also disclosed. The control logic circuit determines a zero crossover point in response to an output signal from the zero crossover detection circuit, and controls a relay coil to actuate the relay contacts to switch a load at the zero crossover point of a load current when the load is connected to the at least one pair of relay contacts, such that the voltage and current across the relay contacts is zero.