JP2011112637A - Receptacle voltage measuring device with bipolar grounding electrode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein since many digital devices such as computers are used and a receptacle with a bipolar grounding electrode (an ordinary receptacle having holes increased more by one due to a use for an earth) is frequently used, such a receptacle is essential in a hospital using precision mechanical equipments to prevent unnecessary electromagnetic noise, further, "Extension Provision Order" is revised so that its installation is required in washing places such as a kitchen, a lavatory and a toilet, and when the receptacle with the bipolar grounding electrode is measured, an ordinary bipolar receptacle may be measured at one time, however, the receptacle with the bipolar grounding electrode has triple poles so that there are three combinations and a measurement needs to be recorded without an error, and in an installed position where a measurement is difficult, a contact of a measuring terminal is not stabilized so that it takes much time. <P>SOLUTION: A rotary switch is used to convert the three combinations of the triple poles to three combinations of two poles, and an insert plug with a bipolar grounding electrode is used as a measuring terminal to solve the unstable contact of the measuring terminal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a measuring instrument for reliably and quickly measuring a voltage of a socket with a two-pole grounding pole at the time of electrical installation work and maintenance inspection.

At present, voltage measuring instruments are only used with two measuring terminals, and each terminal is brought into contact with the measuring part at the time of measurement. In addition, there is an inspection instrument using an LED to confirm that the connection is correctly performed.

  There is a voltage changeover switch (VS) that switches and measures the line voltage of each circuit of the three-phase three-wire type and single-phase three-wire type, but the circuit is different and the purpose of use is also different.

  The number of terminals to be measured has increased to three poles, so there are three combinations of measurement voltages, which remain confused during field work, and the measurement terminals of voltage measuring instruments are not accurate due to unstable contact with the measuring unit. It takes time for the measurement, and it may take time and effort to stabilize the contact of the outlet installed in a place where the measurement cannot be easily performed.

Means to solve the problem

  When there are three terminals for the measurement target, use a rotary switch to convert the three-pole / three combinations into two-pole / three combinations by twisting the knob and send it to the existing voltage measuring instrument. . Also, connect the rotary switch from the plug with a two-pole grounding electrode and insert the plug with a two-pole grounding electrode into the outlet with the two-pole grounding electrode to ensure that the voltage measuring instrument and the measuring part are in contact. And

The invention's effect

  As described above, since the measurement terminal is a plug with a two-pole grounding electrode, contact with the measurement site is ensured, and what needs to be contacted three times for each combination is sufficient. Therefore, it is possible to easily measure what is installed at a site where measurement is difficult. Confusion of measurement combinations is also measured by rotating the knob in a certain direction, so that confusion can be prevented.

  Circuit diagram of the present invention

In the figure, (A) represents a plug with a two-pole grounding electrode.
(B) represents a three-circuit, three-contact rotary switch.
(C) represents a voltage measuring device.

  The operation of the above configuration will be described below. Insert the plug with the two-pole grounding electrode into the outlet with the two-pole grounding electrode, and read the value displayed on the voltage meter. Next, twist the rotary switch and read the voltage measurement value again. Turn the rotary switch knob to read the value of the measuring instrument. This completes the measurement of the three combinations. By using a plug with a two-pole grounding electrode as the measurement terminal, the contact between the terminals can be stabilized, and the measurement terminal can be brought into contact with the measurement unit in combination with a rotary switch. It becomes easy. In addition, when changing the combination, turning the rotary switch knob in a certain direction helps prevent incorrect order combinations.

(B) Plug with double pole grounding electrode (b) 3-circuit 3-contact rotary switch (c) Voltmeter

Claims (1)

  A voltage measuring instrument that uses a rotary switch to convert a three-pole / three-pole combination into a two-pole / three-piece combination when measuring the voltage of a socket with a two-pole grounding pole and uses a plug with a two-pole grounding pole at the measurement terminal. .

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