CN2605701Y

CN2605701Y - Alternating-current star-delta time-delay conversion contactor

Info

Publication number: CN2605701Y
Application number: CN 03202576
Authority: CN
Inventors: 陈兆力
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-25
Filing date: 2003-01-25
Publication date: 2004-03-03
Anticipated expiration: 2013-01-25

Abstract

The utility model relates to an electromotor star and triangular starting conversion device, in particular to an AC star and triangular delay conversion contactor. The main technique is characterized in that two AC contactors are provided, one a star connection and the other a triangular connection; a delay relay is arranged in the middle of the two AC contactors to form integration. The top part of the AC contactor of the triangular connection is mounted with a bridge wiring board (25) with three parallel contacts (12) disposed thereon that are connected with a conducting wire (13) in parallel; the parallel contacts (12) are provided with springs (6); a movable iron core (21) is provided with a seven-shaped wiring board (7) which is provided with an upper and a lower contacts; the seven-shaped wiring board (7) is electrically connected with a back wiring board (27) by a conducting wire (19); a mandril (11) on the delay relay is matched actively with a mecarta pressure tap (20); the contact in the middle of a microswitch (3) is corresponding to the mandril (11); the mecarta pressure tap (20) is connected with main iron cores (1) on the AC contactors; three spring seats (26) are embedded and fixed tightly in the three connection slots on the AC contactors; springs (6) are arranged in the seats; wiring boards are positioned on the springs (6); lower contacts (4) are arranged on the wiring boards and the upper ends of the spring seats (26) recess to the inner to clamp the wiring boards. The arrangement of delay adjusting screw (4) is changed to be upright. Compared with the original one, the utility model cuts down an AC contactor to form an integral one, the utility model can reduce the size and costs and is easy to use.

Description

Exchange star, triangle time-delay conversion contactor

Technical field

The utility model relates to motor star, triangle start conversion equipment, particularly exchanges star, triangle time-delay conversion contactor.

Background technology

Motor star in the past, the triangle start device adopts discrete installation, be formed by connecting with three A.C. contactors and a time relay installation, it installs wiring is that one group of three fixed contact on the 1st A.C. contactor are connected in series with one group of three fixed contact on lead and the 2nd A.C. contactor, and three fixed contacts of another group are connected in series with one group of three fixed contact on lead and the 3rd A.C. contactor on second A.C. contactor, and three fixed contacts of another group lead parallel connection on the 3rd A.C. contactor, exist and take the place, circuit is various, trouble is installed, defectives such as cost height.

The utility model content

The purpose of this utility model is at above-mentioned defective, and a kind of integrally-built interchange star, triangle time-delay conversion contactor are provided.

The technical solution of the utility model is said A.C. contactor, a star-star connection, a delta connection; In the middle of two A.C. contactors time-delay relay is installed and becomes as a whole, Gratz connection plate (25) is equipped with at the A.C. contactor top of delta connection, three contacts in parallel (12) are housed on it, and there is lead (13) to be connected in parallel, on the contact in parallel (12) spring (6) is housed, on the moving iron core (21) 7 font terminal blocks (7) are housed, contact up and down is housed on it, terminal block (27) has lead (19) to be electrically connected behind 7 font terminal blocks (7) and the A.C. contactor; Time-delay relay upper ejector pin (11) cooperates with bakelite pressure mouth (20) is movable, and contact was corresponding with push rod (11) in the middle of sensitive switch (3) was gone up, and bakelite pressure mouth (20) is connected with main iron core (1) on the A.C. contactor.Embed and fastening three spring bases (26) that are equipped with in three connecting grooves on the A.C. contactor of delta connection, in the seat spring (6) is arranged, spring is a terminal block on (6), and contact (14) is housed down on the terminal block, and spring base (26) upper end is the recessed terminal block that blocks inwardly.

The adjustment screw of delaying time on the said time-delay relay (4) is made for vertical type, and sensitive switch (3) is arranged on its bottom, the fixed contact (23) in the switch (3) with about main and sub-coil (9) (10) on 2 A.C. contactors be electrically connected.

The utility model has the advantages that and reduce by an A.C. contactor, be mounted to integral type, reduce taking the place, easy to use, reduce cost.

Description of drawings

Further describe embodiment below in conjunction with accompanying drawing.

Fig. 1 is the whole front view of the utility model.

Fig. 2 is a vertical view of the present utility model.

Fig. 3 is the utility model side schematic view.

Fig. 4 is a time-delay relay mechanical part structural representation.

Embodiment

With reference to Fig. 1,1---main iron core, 2---coil connectors, 3---the bridge-type sensitive switch, 4---the time-delay adjustment screw, 5---the contact cross-arm, 6---spring, 7---7 font terminal blocks, 8---main traverse line, 9---main coil, 10---secondary coil, 11---push rod, 12---contact in parallel, 13---parallel conducting wire, 14---following contact, 15---screw, 16---the rubber air chamber, 17---winding wire, 18---following contact, 20---the bakelite pressure mouth, 21---moving iron core, 22---arc-extinguish chamber, 23---the sensitive switch fixed contact, 24---pressing plate, 25---the Gratz connection plate, 26---spring base.As shown, exchanging star, triangle time-delay transducer, is that three-way motor star connection starts, and is converted to the utensil of delta connection during normal operation.The right side is the A.C. contactor of star connection among the figure, and the left side is the A.C. contactor of delta connection.In the middle of both is that air chamber formula time-delay relay becomes as a whole.Gratz connection plate (25) is equipped with at the A.C. contactor top, and three contacts in parallel (12) are housed on it, and has lead (13) to be connected in parallel.On the contact in parallel (12) spring (6) is housed, on the moving iron core (21) 7 font terminal blocks (7) is housed, contact up and down is housed on it, 7 font terminal blocks (7) have lead (19) to be electrically connected with back terminal block (27).Time-delay relay upper ejector pin (11) cooperates with bakelite pressure mouth (20) is movable, and contact is corresponding with push rod (11) in the middle of the sensitive switch (3), and bakelite pressure mouth (20) is connected with main iron core (1) on the A.C. contactor.Embed and fastening three spring bases (26) that are equipped with in three connecting grooves on the A.C. contactor of delta connection, in the seat spring (6) is arranged, spring is a terminal block on (6), and contact (14) is housed down on the terminal block, and spring base (26) upper end is the recessed terminal block that blocks inwardly.Bridge-type sensitive switch (3) is equipped with in this relay bottom, and it is electrically connected with the coil (9) (10) of left and right sides A.C. contactor; The adjustment screw at relay top (4) is horizontal installation in the past, is improved to vertical type and installs, and handled easily, the installation site is more reasonable; Middle moving contact on the bridge-type sensitive switch (3) is corresponding with push rod (11) position, push rod (11) cooperates with bakelite pressure mouth (20) is movable again, there are plate washer and bakelite pressure mouth (20) inconsistent on the push rod (11), push rod between baffle plate and the air chamber is with spring on (11), bakelite pressure mouth (20) is connected with main iron core (1) on the A.C. contactor, and general the employing is fastenedly connected.Air chamber is generally the rubber air chamber.

After right side A.C. contactor starts, main iron core (1) is inhaled down, and the bakelite pressure mouth (20) on it also moves down, thereby push rod (11) is also moved down, rubber air chamber (16) enters air, move gradually, push rod (11) is contacted with sensitive switch (3) press down, thereby make its moving contact and fixed contact (23) closure, secondary coil (10) conduction, the A.C. contactor on the left side starts, and makes motor insert delta connection, thereby makes motor enter the normal operation stage.

With reference to Fig. 2, be vertical view of the present utility model.5---contact cross-arm, 8---main traverse line, 12---contact in parallel, 13---parallel conducting wire, 15---screw, 19---subpolygons.The wiring situation of major-minor lead (8) (9) as seen from the figure.Star, triangle wiring are so now: star-star connection A.C. contactor upper static contact is connected in series with the fixed contact on lead and the delta connection A.C. contactor.There is Gratz connection plate (25) that three of upper static contacts are housed on the delta connection A.C. contactor, with lead (13) parallel connection.And contact up and down is housed on the 7 font terminal blocks (7), and 7 font terminal blocks (7) are contained on the iron core (21), and have lead (19) to be connected with back terminal block (27), and back terminal block (27) is gone up and is connected with motor lead.

With reference to Fig. 3, be the utility model side schematic view.Among the figure, 2-coil connectors, 7---7 font terminal blocks, 8---main traverse line, 12---contact in parallel, 15---screw, 19---subpolygon, 27---back terminal block.

With reference to Fig. 4, be time-delay relay mechanical part structure situation, 4---adjustment screw, 6---spring, 11---push rod, 15---screw, 16---rubber air chambers.

The A.C. contactor of delta connection, its coil (10) energising start inhales down iron core (21), connects the triangularity connection, and motor is normally moved.And the action of star-star connection A.C. contactor, the delta connection A.C. contactor is failure to actuate, and promptly is star connection.Star---during delta connection, motor must have 6 lead-out wires, is divided on each three binding post on two A.C. contactors.

Claims

1, exchange star, triangle time-delay conversion contactor, be electrically connected with the time relay by A.C. contactor and form, it is characterized in that:

2 of a, said A.C. contactors, a star-star connection, another delta connection;

In the middle of b, two A.C. contactors time-delay relay is installed and becomes as a whole, Gratz connection plate (25) is equipped with at the A.C. contactor top of delta connection, three contacts in parallel (12) are housed on it, and be connected in parallel at lead (13), on the contact in parallel (12) spring (6) is housed, on the moving iron core (21) 7 font terminal blocks (7) are housed, contact up and down is housed on it, terminal block (27) has lead (19) to be electrically connected behind 7 font terminal blocks (7) and the A.C. contactor; Time-delay relay upper ejector pin (11) cooperates with bakelite pressure mouth (20) is movable, and contact was corresponding with push rod (11) in the middle of sensitive switch (3) was gone up, and bakelite pressure mouth (20) is connected with main iron core (1) on the A.C. contactor,

Embed and fastening three spring bases (26) that are equipped with in three connecting grooves on the A.C. contactor of C, delta connection, in the seat spring (6) is arranged, spring is a terminal block on (6), and contact (14) is housed down on the terminal block, and spring base (26) upper end is the recessed terminal block that blocks inwardly.

2, according to the said interchange star of claim 1, triangle time-delay conversion contactor, the adjustment screw (4) that it is characterized in that delaying time on the time-delay relay is made vertical type, sensitive switch (3) arranges in its bottom, the fixed contact (23) in the switch (3) with about main and sub-coil (9) (10) on 2 A.C. contactors be electrically connected.