CN212849862U

CN212849862U - Marine phase sequence unscrambler

Info

Publication number: CN212849862U
Application number: CN202020820255.3U
Authority: CN
Inventors: 吉苏朋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-03-30
Anticipated expiration: 2030-05-15

Abstract

The utility model provides a marine phase sequence unscrambler, including ac contactor KM1 main contact and ac contactor KM2 main contact, phase sequence relay, ac contactor KM1 main contact and ac contactor KM2 main contact are used for connecting marine load and three-phase electricity, and wherein ac contactor KM1 main contact and ac contactor KM2 main contact are reverse parallel arrangement; three main joints of the phase sequence relay are respectively connected with three-phase power U1, V1 and W1, one end of a normally open contact of the phase sequence relay is connected with U1, and the other end of the normally open contact of the phase sequence relay is connected with V1 through an alternating current contactor KM1 coil; one end of a normally closed contact of the phase sequence relay is connected with W1, and the other end of the normally closed contact is connected with V1 through an alternating current contactor KM2 coil. Whether the phase sequence is correct is judged through the phase sequence relay, and the on-off of an alternating current contactor coil is fed back, so that the phase sequence is always correct by controlling the switching of a main contact of the alternating current contactor, and when the phase is disconnected, the main contact of the alternating current contactor is not switched on, the circuit does not work, and the risk of damage to a marine electric appliance is avoided.

Description

Marine phase sequence unscrambler

Technical Field

The utility model relates to a three-phase electricity field, in particular to marine phase sequence unscrambler.

Background

The current ship needs to be parked at a wharf and the like for supplying in the sailing process, the commercial power needs to be connected in the supplying process, the current commercial power is three-phase power, the basic wiring sequence is U1, V1 and W1, if the connection is wrong, the equipment is damaged, property loss is caused, and therefore the situation that how to ensure that the connection is not reversed and the judgment can be quickly carried out is very necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned problem, provide a marine phase sequence unscrambler.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a marine phase sequence corrector comprises an alternating current contactor KM1 main contact, an alternating current contactor KM2 main contact and a phase sequence relay, wherein the alternating current contactor KM1 main contact and the alternating current contactor KM2 main contact are used for connecting marine loads and three-phase power, and the alternating current contactor KM1 main contact and the alternating current contactor KM2 main contact are arranged in a reverse parallel mode; three main joints of the phase sequence relay are respectively connected with three-phase power U1, V1 and W1, one end of a normally open contact of the phase sequence relay is connected with U1, and the other end of the normally open contact of the phase sequence relay is connected with V1 through an alternating current contactor KM1 coil; one end of a normally closed contact of the phase sequence relay is connected with W1, and the other end of the normally closed contact is connected with V1 through an alternating current contactor KM2 coil.

As an improvement of the utility model, the main contact wiring phase sequence of the alternating current contactor KM1 is U1, V1 and W1; the main contact wiring phase sequence of the alternating current contactor KM2 is U1, W1 and V1.

As an improvement of the utility model, the coil KM1 of the AC contactor is connected in series with an AC contactor KM2 normally closed switch; the coil KM2 of the AC contactor is connected with a normally closed switch KM1 in series for interlocking.

As an improvement of the utility model, marine phase sequence unscrambler still wrap positive sequence pilot lamp HL1, AC contactor's KM1 coil and AC contactor KM2 normally closed switch establish ties the back and connect in parallel the setting with positive sequence pilot lamp HL 1.

As an improvement of the utility model, marine phase sequence unscrambler still include contrary preface HL2, wherein AC contactor's KM2 coil and AC contactor KM1 normally closed switch establish ties after with the parallelly connected setting of contrary preface pilot lamp HL 2.

Has the advantages that:

the utility model provides a pair of marine phase sequence unscrambler judges through the phase sequence relay whether correct of phase sequence to through the break-make that feeds back to the ac contactor coil, thereby the switching of control ac contactor main contact guarantees that the phase sequence is correct all the time, and when the open-phase, and the ac contactor main contact is not expert at, and the circuit is out of work, has avoided the risk that marine electrical apparatus damaged.

Drawings

Fig. 1 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

The present invention will be further clarified by the following embodiments with reference to the attached drawings, which are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention.

Example 1:

as shown in fig. 1, the circuit connection diagram of the present invention, referring to fig. 1, the marine phase sequence corrector disclosed in this embodiment includes a main contact of an ac contactor KM1, a main contact of an ac contactor KM2, and a phase sequence relay, where the main contact of the ac contactor KM1 and the main contact of the ac contactor KM2 are used for connecting a marine load and three-phase power, and the main contact of the ac contactor KM1 and the main contact of the ac contactor KM2 are arranged in reverse parallel; three main joints of the phase sequence relay are respectively connected with three-phase power U1, V1 and W1, one end of a normally open contact of the phase sequence relay is connected with U1, and the other end of the normally open contact of the phase sequence relay is connected with V1 through an alternating current contactor KM1 coil; one end of a normally closed contact of the phase sequence relay is connected with W1, and the other end of the normally closed contact is connected with V1 through an alternating current contactor KM2 coil.

The main contact wiring phase sequence of the alternating current contactor KM1 is U1, V1 and W1; the main contact wiring phase sequence of the alternating current contactor KM2 is U1, W1 and V1.

A KM1 coil of the alternating current contactor is connected with an alternating current contactor KM2 normally closed switch in series; the coil KM2 of the AC contactor is connected with a normally closed switch KM1 in series for interlocking.

The marine phase sequence corrector also comprises a positive sequence indicator lamp HL1, and a KM1 coil of an alternating current contactor is connected with a KM2 normally-closed switch in series and then is connected with the positive sequence indicator lamp HL1 in parallel.

The marine phase sequence corrector also comprises a reverse sequence HL2, wherein a KM2 coil of an alternating current contactor is connected with a KM1 normally-closed switch in series and then is connected with a reverse sequence indicator lamp HL2 in parallel.

The working principle is as follows:

when the wiring sequence is U1, V1 and W1, the three-phase sequence obtained by the phase sequence relay DXJ is also U1, V1 and W1, at the moment, the two normal heads of the phase sequence relay DXJ work 5, 6 are closed, the coil of the alternating current contactor KM1 is electrified, the positive sequence indicator lamp HL1 is lightened, the main contact of the alternating current contactor KM1 is closed, and the sequence of the power supply of QF1 is U1, V1 and W1, which is the positive sequence.

When the wiring sequence is other sequences, the sequence is different from the sequence on the coil of the phase sequence relay DXJ, the relay is electrified but does not work, the two long closed

ends

7 and 8 are continuously closed, the coil of the alternating current contactor KM2 is electrified, the reverse sequence indicator lamp HL2 is lightened, the main contact of the alternating current contactor KM2 is attracted, the sequence of the obtained electricity of the QF1 is different from the original wiring sequence, and the sequence is still U1, V1 and M1, which is the reverse sequence.

If the three-phase power is cut off from one phase, the positive sequence indicator lamp HL1 and the negative sequence indicator lamp HL2 are not lighted if only two phases exist, and the phase failure is represented.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme formed by the arbitrary combination of the technical characteristics. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. A marine phase sequence unscrambler, characterized in that: the device comprises an alternating current contactor KM1 main contact, an alternating current contactor KM2 main contact and a phase sequence relay, wherein the alternating current contactor KM1 main contact and the alternating current contactor KM2 main contact are used for connecting a marine load and three-phase power, and the alternating current contactor KM1 main contact and the alternating current contactor KM2 main contact are arranged in a reverse parallel mode; three main joints of the phase sequence relay are respectively connected with three-phase power U1, V1 and W1, one end of a normally open contact of the phase sequence relay is connected with U1, and the other end of the normally open contact of the phase sequence relay is connected with V1 through an alternating current contactor KM1 coil; one end of a normally closed contact of the phase sequence relay is connected with W1, and the other end of the normally closed contact is connected with V1 through an alternating current contactor KM2 coil; a KM1 coil of the alternating current contactor is connected with an alternating current contactor KM2 normally closed switch in series; a KM2 coil of the AC contactor is connected with a KM1 normally closed switch in series for interlocking; the marine phase sequence corrector also comprises a positive sequence indicator lamp HL1, wherein a KM1 coil of an alternating current contactor is connected with a KM2 normally-closed switch in series and then is connected with the positive sequence indicator lamp HL1 in parallel; the marine phase sequence corrector also comprises a reverse sequence indicator lamp HL2, wherein a KM2 coil of an alternating current contactor and a KM1 normally-closed switch of the alternating current contactor are connected in series and then are connected in parallel with the reverse sequence indicator lamp HL 2.

2. The marine phase sequence straightener of claim 1, wherein: the main contact wiring phase sequence of the alternating current contactor KM1 is U1, V1 and W1; the main contact wiring phase sequence of the alternating current contactor KM2 is U1, W1 and V1.