JPH1014184A - Packaged motor starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packaged motor starter capable of simplifying inside-a- panel wiring work and fitting work by combining at least a circuit-breaker, an electromagnetic contactor, an overcurrent relay, and an instrument current transformer by a unit component type individually. SOLUTION: A packaged motor starter is a starter by a low-voltage induction motor, and a circuit-breaker 4, an electromagnetic contactor 5, an overcurrent relay 7, and instrument current transformers 9 are fitted by a connector system into a unit as a combined component. Besides, each of these four kinds of components has replaceable structure, and one unit is provided with four functions. And, since it is possible to put together in an iron box, a plurality of packaged motor starters with built-in circuit-breakers 4, electromagnetic contactors 5, overcurrent relays 7, instrument current transformers 9, etc., it becomes unnecessary to do inside-a-panel wiring work and inside-a-panel fitting work for all components. As the result, it becomes possible to obtain a packaged motor starter capable of simplifying the inside-a-panel wiring work and the fitting work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter / stop device for a low-voltage induction motor in electric equipment, that is, a package motor starter used for a control device for an induction motor.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing the structure of a conventional motor starter of this type. In FIG. 3, a circuit breaker (MCC
B) 31 is an electromagnetic contactor (MgSW) by a cable 32
It is connected to an overcurrent relay 34 via 33. The overcurrent relay 34 is connected to a terminal block 35.
As described above, in the conventional motor starter, parts are divided according to each function, and each part is incorporated in the iron box of the panel, and wiring and mounting work are required for all parts.

That is, a circuit breaker, an electromagnetic contactor, an overcurrent relay, and a current transformer for an instrument (not shown) are independent components, and they are appropriately combined and wired, and a control panel (iron box) is used as a starting device. To be completed.

[0004]

Since the conventional motor starter has the above-described configuration, the number of steps for assembling and wiring is increased, and the required space is increased. In addition, of the board manufacturing costs, the mounting of parts and wiring work in the board account for a large amount of cost. An object of the present invention is to provide a package motor starter that can simplify wiring work and mounting work in a panel.

[0005]

Means for Solving the Problems To solve the above problems and achieve the object, a package motor starter of the present invention is configured as follows. The package motor starter of the present invention is a starter of a low-voltage induction motor, and at least a circuit breaker, an electromagnetic contactor, an overcurrent relay, and a current transformer for an instrument are combined in a unit part form.

[0006] As a result of taking the above measures, the following effects occur. Since the package motor starter of the present invention combines at least a circuit breaker, an electromagnetic contactor, an overcurrent relay, and a current transformer for an instrument in the form of a unit component, the circuit breaker, the electromagnetic contactor, the overcurrent relay, and the instrument The current transformer is housed in one unit box, and can function as a control device for the induction motor, so that the motor starter can be compactly handled. In addition, all the components of the induction motor control device are housed in a non-combustible box and unitized, so that it can be assembled in a connector type, so that the installation space for the motor starter can be reduced and wiring work inside the panel and wiring work can be greatly reduced. It can be simplified and simplified, and the cost for these works can be reduced.

[0007]

FIG. 1 is a perspective view showing a configuration of a package motor starter according to an embodiment of the present invention. The package motor starter shown in FIG. 1 is a starter for a low-voltage induction motor.
Is a pressure reflector, 4 is a circuit breaker, 5 is an electromagnetic contactor, 6 is a noncombustible material case (ebonite), 7 is an overcurrent relay, 8 is an electromagnetic coil, 9 is a current transformer for an instrument, and 10 is an instrument. Current transformer terminals (for measuring operation circuit signals and current), 11 is an output terminal, and 12 is a main breaker.

The circuit breaker 4, the electromagnetic contactor 5, the overcurrent relay 7, and the current transformer 9 shown in FIG. 1 are mounted in a single unit in a connector type as combined components. Each of these four parts has a replaceable structure, and four functions are provided in one unit.

FIG. 2 is a diagram showing a configuration in which a number of the package motor starters are incorporated in an iron box of a control panel. As described above, the package motor starter includes a breaker section 4, an electromagnetic contactor section 5, an overcurrent relay 7, and a current transformer 9 for an instrument.
And so on. A plurality of package motor starters 15 are incorporated in the iron box 17. These package motor starters 15 are sequentially connected by the in-panel crossover wiring 14, and one package motor starter 1
5, a main breaker 22 is connected. The main cable 13 is connected to the main breaker 22, and the external cable 16 is connected to each package motor starter 15.

As described above, according to the present embodiment, a plurality of package motor starters incorporating the circuit breaker unit 4, the electromagnetic contactor unit 5, the overcurrent relay 7, the current transformer 9 for the instrument, and the like are mounted on the iron box 17. Can be incorporated. That is, unlike the conventional packaged motor starter, the parts are not divided for each function, and the parts are not individually installed in the iron box of the control panel. You don't have to.

The present invention is not limited to the above-described embodiment, and can be modified as needed without departing from the scope of the invention. (Summary of Embodiment) The configuration, operation and effect shown in the embodiment are summarized as follows.

A package motor starter 15 shown in the embodiment is a starter of a low-voltage induction motor, and at least a circuit breaker 4, an electromagnetic contactor 5, an overcurrent relay 7, and a current transformer 9 for a unit are each formed as a unit component. Are combined.

As described above, in the packaged motor starter, at least the circuit breaker 4, the electromagnetic contactor 5, the overcurrent relay 7, and the current transformer 9 for the instrument are combined in the form of a unit component. The electromagnetic contactor 5, the overcurrent relay 7, and the current transformer 9 for the instrument are housed in one unit box, and can have the function of the control device of the induction motor, so that the motor starter can be compactly handled. In addition, all the components of the induction motor control device are housed in a non-combustible box and unitized, so that it can be assembled in a connector type, so that the installation space for the motor starter can be reduced and wiring work inside the panel and wiring work can be greatly reduced. It can be simplified and simplified, and the cost for these works can be reduced.

[0014]

According to the present invention, it is possible to provide a package motor starter which can simplify wiring work and mounting work in a panel. In other words, assembling the unit at a factory or the like can greatly omit wiring work and mounting work in the panel, which can greatly contribute to a reduction in the price of the control panel. In addition, the size of the control panel can be drastically reduced, so that the cost can be reduced, and the replacement of each part is facilitated, which can contribute to the reduction of maintenance costs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a package motor starter according to an embodiment of the present invention.

FIG. 2 is a diagram related to the embodiment of the present invention, showing a configuration in which a number of package motor starters are incorporated in an iron box of a control panel.

FIG. 3 is a diagram showing a configuration of a motor starter according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power supply side terminal 2 ... Contact point 3 ... Pressure reflector 4 ... Circuit breaker part 5 ... Electromagnetic contactor part 6 ... Non-combustible material case (ebonite) 7 ... Overcurrent relay 8 ... Electromagnetic coil 9 ... Meter current transformer 10 ... Current transformer terminal for instrument (for operation circuit signal and current measurement) 11 Output terminal 12 Main breaker 13 Main cable 14 Crossover wiring in board 15 Package motor starter 16 External cable 17 Iron box 22 Master Breaker 31 ... Circuit breaker (MCCB) 32 ... Cable 33 ... Electromagnetic contactor (MgSW) 34 ... Overcurrent relay 35 ... Terminal block

Claims (1)

[Claims] 1. A package motor starter for a low-voltage induction motor, wherein at least a circuit breaker, an electromagnetic contactor, an overcurrent relay, and a current transformer for an instrument are combined in a unit part form.