A modular contactor. The modular contactor includes a driving module (1), an intermediate connection module (2), a breaking module (3), an upper application interface module (4), and a lower application interface module (5); the driving module (1) is detachably connected to a first side of the intermediate connection module (2); the breaking module (3) is detachably connected to a second side of the intermediate connection module (2) ; the upper application interface module (4) is detachably connected to the top of the breaking module (3) so as to be electrically connected to upper static contacts of the multiple breaking units; the lower application interface module (5) is detachably connected to the bottom of the breaking module (3) so as to be electrically connected to lower static contacts of the multiple breaking units.

The present disclosure provides a pluggable connecting device for a contactor and a contactor, the contactor including a housing, a coil framework located inside the housing, the coil framework provided with a first and a second connecting sheet, and an electromagnetic coil wound on the coil framework, two ends of the electromagnetic coil electrically connected to the first and second connecting sheets. The pluggable connecting device includes an insulated connecting member, and a first and second conductive elements which are fixedly connected with the insulated connecting member. The first conductive element is provided with an insertion end and a wiring end which are arranged oppositely, the second conductive element is provided with an insertion end and a wiring end which are arranged oppositely, and the insertion ends of the first and second conductive elements are configured for connection with the first and second connecting sheets respectively in a pluggable manner.

The present disclosure provides a pluggable connecting device for a contactor and a contactor, the contactor including a housing, a coil framework located inside the housing, the coil framework provided with a first and a second connecting sheet, and an electromagnetic coil wound on the coil framework, two ends of the electromagnetic coil electrically connected to the first and second connecting sheets. The pluggable connecting device includes an insulated connecting member, and a first and second conductive elements which are fixedly connected with the insulated connecting member. The first conductive element is provided with an insertion end and a wiring end which are arranged oppositely, the second conductive element is provided with an insertion end and a wiring end which are arranged oppositely, and the insertion ends of the first and second conductive elements are configured for connection with the first and second connecting sheets respectively in a pluggable manner.

A tester for a relay comprises an enclosure, a testing circuit that includes a controller, electronic switch components, a power source, indicator LEDs, a test start switch, a relay selector switch, and five electric leads each connected with one terminal of the relay. With the relay selector switch toggled to indicate the type of relay being tested, with power supplied to each lead, and with the test start switch actuated, the controller sets each lead to ground, in turn, and then count the number of other leads that are grounded as a result. The controller then illuminates the at least one indicator to indicate either the passing relay test or the failed relay test based on the counts measured. Once the leads connected to the relay coil are identified, cyclic testing of the relay can be performed.

A tester for a relay comprises an enclosure, a testing circuit that includes a controller, electronic switch components, a power source, indicator LEDs, a test start switch, a relay selector switch, and five electric leads each connected with one terminal of the relay. With the relay selector switch toggled to indicate the type of relay being tested, with power supplied to each lead, and with the test start switch actuated, the controller sets each lead to ground, in turn, and then count the number of other leads that are grounded as a result. The controller then illuminates the at least one indicator to indicate either the passing relay test or the failed relay test based on the counts measured. Once the leads connected to the relay coil are identified, cyclic testing of the relay can be performed.

A method of controlling an electromagnetic relay includes supplying a first voltage to an exciting coil to bring a movable terminal into contact with a fixing terminal; causing a coupling state determination unit to determine that a coupling failure is detected in a case where the movable terminal is not brought into contact with the fixing terminal and the electromagnetic relay is not turned on despite the supplying the first voltage to the exciting coil; and supplying a second voltage higher than the first voltage from a booster circuit to the exciting coil in a case where the coupling state determination unit determines that the coupling failure is detected. The second voltage is generated by boosting the first voltage by the booster circuit.

A method of controlling an electromagnetic relay includes supplying a first voltage to an exciting coil to bring a movable terminal into contact with a fixing terminal; causing a coupling state determination unit to determine that a coupling failure is detected in a case where the movable terminal is not brought into contact with the fixing terminal and the electromagnetic relay is not turned on despite the supplying the first voltage to the exciting coil; and supplying a second voltage higher than the first voltage from a booster circuit to the exciting coil in a case where the coupling state determination unit determines that the coupling failure is detected. The second voltage is generated by boosting the first voltage by the booster circuit.

Testable sealed and/or self-diagnosing electromagnetic or solid-state relays simplify troubleshooting of electrical circuits. The testable relay comprises a relay housing with terminals adapted to connect to a circuit and an opposing top wall with testable terminals formed as projections being flush with or extending from the top wall and being exposed for testing the relay by applying a multimeter device. A self-diagnosing relay comprises a relay housing with terminals adapted to connect to a circuit, and at least two light-emitting diodes (LEDs). One of the LED indicates the relay is energized, and another LED light is a diagnostic LED and indicates if the relay is damaged.

Disclosed is a magnetic latching relay capable of accurately positioning a magnetic circuit, comprising a magnetic circuit portion and a base, the magnetic circuit portion comprising a yoke, an iron core, an armature, and a bobbin, the iron core is inserted into a through-hole of the bobbin, and the yoke comprises two yokes, and one side of each of the two yokes is connected to the iron core respectively at the both ends of the through-hole of the bobbin, and the armature is fitted between the other side of each of the two yokes, the magnetic circuit portion is mounted on the base, with the axis of the through-hole of the bobbin in a horizontal manner; in at least one of the two yokes, a positioning convex portion is further provided on the outward face of the side of the yoke, positioning grooves are formed in at least one side wall to be engaged with the positioning convex portion of the yoke, to realize the positioning of the magnetic circuit portions on the base in the horizontal direction perpendicular to the axis of the bobbin through hole.

An electromagnetic relay includes a fixed terminal, a movable contact piece, a housing, and a heat dissipation structure. The fixed terminal includes a first surface, a second surface opposite the first surface, and a fixed contact disposed on the first surface. The movable contact piece includes a movable contact that is configured to contact the fixed contact. The housing includes an accommodation space accommodating a portion of the fixed terminal, the fixed contact, and the movable contact piece. The heat dissipation structure includes a heat dissipation space that is provided on the second surface of the fixed terminal for dissipating the heat of the fixed terminal to an outside of the accommodation space.