JPH0221570U - - Google Patents
Info
- Publication number
- JPH0221570U JPH0221570U JP10044988U JP10044988U JPH0221570U JP H0221570 U JPH0221570 U JP H0221570U JP 10044988 U JP10044988 U JP 10044988U JP 10044988 U JP10044988 U JP 10044988U JP H0221570 U JPH0221570 U JP H0221570U
- Authority
- JP
- Japan
- Prior art keywords
- output
- operational amplifier
- switch
- low voltage
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案に係る絶縁抵抗計の一実施例の
接続図、第２図は従来の絶縁抵抗計の一例の接続
図である。
１……直流低電圧源、２……高電圧発生回路、
３……測定用スイツチ、５……対数変換回路、６
……演算増幅器、７……指示計、８……トランジ
スタ回路、９１，９２……トランジスタ回路。
FIG. 1 is a connection diagram of an embodiment of an insulation resistance meter according to the present invention, and FIG. 2 is a connection diagram of an example of a conventional insulation resistance meter. 1...DC low voltage source, 2...High voltage generation circuit,
3... Measurement switch, 5... Logarithmic conversion circuit, 6
...Operation amplifier, 7...Indicator, 8...Transistor circuit, 91, 92...Transistor circuit.
Claims (1)
チを介して与えられると直流の高電圧を発生する
直流高電圧発生回路、この直流高電圧発生回路の
出力を取出すアース端子とライン端子、このライ
ン端子に第１のダイオードを介して接続された対
数変換回路、この対数変換回路の出力を演算増幅
器を介して指示する指示計、前記スイツチの出力
側と演算増幅器の電源端の間に接続され絶縁抵抗
の測定時において前記スイツチを介して前記直流
低電圧源の出力を電源として前記演算増幅器に与
える第２のダイオード、及び前記スイツチの入力
側と前記演算増幅器の電源端の間に接続され測定
対象の交流電圧の測定時において前記対数変換回
路に生じる電圧によつてオンになり前記直流の低
電圧源の出力を電源として前記演算増幅器に与え
るトランジスタ回路よりなる絶縁抵抗計。 A DC low voltage source, a DC high voltage generation circuit that generates a DC high voltage when the output of this low voltage source is applied via a switch, a ground terminal and a line terminal to take out the output of this DC high voltage generation circuit, and this A logarithmic conversion circuit connected to the line terminal via a first diode, an indicator for indicating the output of the logarithmic conversion circuit via an operational amplifier, and an indicator connected between the output side of the switch and the power supply terminal of the operational amplifier. A second diode that supplies the output of the DC low voltage source to the operational amplifier as a power source through the switch when measuring insulation resistance, and a second diode that is connected between the input side of the switch and the power supply terminal of the operational amplifier for measurement. An insulation resistance meter comprising a transistor circuit that is turned on by a voltage generated in the logarithmic conversion circuit when measuring an AC voltage of interest and supplies the output of the DC low voltage source to the operational amplifier as a power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10044988U JPH0221570U (en) | 1988-07-28 | 1988-07-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10044988U JPH0221570U (en) | 1988-07-28 | 1988-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221570U true JPH0221570U (en) | 1990-02-13 |
Family
ID=31328530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10044988U Pending JPH0221570U (en) | 1988-07-28 | 1988-07-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221570U (en) |
-
1988
- 1988-07-28 JP JP10044988U patent/JPH0221570U/ja active Pending