KR20020008649A - The manufacturing technology for single unit amparemeter - Google Patents

Abstract

PURPOSE: A technique for fabricating switch-integrated ammeter is provided to reduce a fabrication costs of a device and to increase a competitive power through qualitative improvement of a completed product. CONSTITUTION: An indication portion(1) indicates load current of a selected phase. Since a secondary current is five amperes, a value obtained by multiplying a ratio of a primary current to a secondary current. R-phase, S-phase and T-phase current display lamps(2, 3, 4) display the selected phase. If a switch(5) is pushed, the R-phase current display lamp is turned on, and a current value of the R-phase is displayed on the indication portion(1). If an S-phase current select switch(6) is pushed, the lamp(2) is turned off and a current value of an S-phase is outputted through the indication portion(1). If a T-phase current select switch is pushed, the lamp(3) is turned off and a measurement value of the indication portion(1) becomes a T-phase current.

Description

Switch-integrated ammeter manufacturing technology {THE MANUFACTURING TECHNOLOGY FOR SINGLE UNIT AMPAREMETER}

The present invention relates to a switch-integrated ammeter for checking the load current of any machine or device and the equal distribution of the load current. Conventionally, after selecting the mounting position of the ammeter and the switch on the steel control panel, the marking is performed after the punching process. After fixing it and wiring it according to the wiring diagram, there was a huge waste of time and physical design.

The present invention is to solve the above problems by the selection switch function at the lower end of the ammeter is turned on the lamp of the corresponding phase on the front left side of the indicator to indicate that the current is instructed to reduce the manufacturing cost of the device significantly through the quality improvement of the finished product The purpose of the invention is to increase the competitiveness.

In order to achieve the above object, the present invention multiplies the secondary current (typically 5 amps) of the current flowing through the current transformer by the primary: secondary current ratio of the current transformer and appears on the display, and the soft switch selects each phase. In accordance with the instruction of the control panel consisting of the trademark lamp on the upper left of the indicator is turned on to measure the current of the phase.

The electromagnetic board thus constructed can be mounted in a dedicated case to block noise, and the wiring can be attached to a control panel required by processing terminal blocks or connectors.

Fig. 1 shows the external shape of an ammeter and a current switching switch for operating an industrial room or a building in a machine room, or for controlling a test apparatus, and Fig. 2 is a connection diagram required at that time.

Figure 3 is a structural diagram of a switch-integrated ammeter used in the present invention and Figure 4 is a connection diagram applied when using the product of the present invention.

(Description of the main parts of the drawing)

1) Indicator 2) R phase current indicator 3) S phase current indicator 4) T phase current indicator

5) R phase current selection switch 6) S phase current selection switch 7) T phase current selection

8) Alternating action setting switch

Hereinafter, described in detail by the accompanying drawings as follows.

As shown in the detailed diagram of FIG. 3, (1) indicates the load current of the selected phase. In general, the current transformer secondary current is 5 amps, so when a current of 0-5 amps is introduced, the primary current between the inflow current and the current transformer is secondary. The product of the ratio multiplied appears in the indicator.

(2) (3) (4) indicates the selected phase, (5) (6) (7) is the phase selection switch, and (8) is the cyclic measurement function setting switch. When R is turned on, the current value of the R phase is displayed on the indicator (1). When the switch (6) is pressed, the lamp 2 is turned off, the lamp is switched to the lamp 3, and the current value of the S phase is output to the indicator (1). In addition, when the switch 7 is pressed, the lamp 3 is switched off and switched to the lamp 4, and at the same time, the measured value of the indicator 1 becomes a T phase current.

If the switch 8 is pressed once, the current is instructed while alternately circulating each phase by a predetermined time within 10 seconds, so that the current of each phase can be conveniently measured. In addition, the dip switch 9 can be used to set the measurement ratio, and when necessary, a conversion function can be added to extract analog or communication thrust and transmit the data to an upper or lower device.

As described above, the present invention can be conveniently and simply measured alone when measuring the current in the operation of an industrial machine or an experimental device. Also, since the selective operation switch and the current indicating unit are integrated, a wide space can be used. Completed in one step, it can contribute significantly to cost reduction.

Claims (5)

Integration technology of ammeter and current changeover switch A technology for automatically transferring to the most recently selected phase according to claim 1 The technique of claim 2 and 2, which imparts a circulation measurement function to each phase. The technique of claim 1, wherein the magnification can be adjusted. The technique of claim 1 and 2, wherein the transmission output function is provided.