JPH041506Y2 - - Google Patents
Info
- Publication number
- JPH041506Y2 JPH041506Y2 JP15518486U JP15518486U JPH041506Y2 JP H041506 Y2 JPH041506 Y2 JP H041506Y2 JP 15518486 U JP15518486 U JP 15518486U JP 15518486 U JP15518486 U JP 15518486U JP H041506 Y2 JPH041506 Y2 JP H041506Y2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- capacitor
- voltage dividing
- commercial frequency
- voltage
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 37
- 239000013307 optical fiber Substances 0.000 claims description 7
- 230000000670 limiting effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は商用周波電圧およびこれに重畳された
サージ電圧測定用の電圧変成器に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a voltage transformer for measuring commercial frequency voltage and surge voltage superimposed thereon.
この種の測定器のうち現在一般に使用されるも
のとして、商用周波電圧については各種の計器用
電圧変成器があり、またサージ電圧測定用として
は、コンデンサ分圧器＋発光ダイオード＋光フア
イバ＋光電圧変換器よりなるものがある。
Among these types of measuring instruments, currently commonly used are various instrument voltage transformers for commercial frequency voltage, and capacitor voltage divider + light emitting diode + optical fiber + optical voltage for measuring surge voltage. Some consist of converters.
しかし、これらの装置は商用周波電圧またはサ
ージ電圧のどちらか一方のみの測定を行なうもの
であり、商用周波電圧およびこれに重畳されたサ
ージ電圧の双方を一度に測定することは不可能で
あつた。
However, these devices only measure either the commercial frequency voltage or the surge voltage, and it is impossible to measure both the commercial frequency voltage and the surge voltage superimposed on it at the same time. .
本考案は上記双方の電圧の同時測定を可能とす
ることを目的とし、上述したコンデンサ分圧器、
発光ダイオード、光フアイバおよび光電圧変換器
よりなる、それぞれ商用周波電圧用およびサージ
電圧用とした２組の装置を構成し、これを組合わ
せることにより、上記目的を達成するものであ
る。
The purpose of the present invention is to enable simultaneous measurement of both voltages, using the capacitor voltage divider described above,
The above object is achieved by configuring two sets of devices, one for commercial frequency voltage and one for surge voltage, each consisting of a light emitting diode, an optical fiber, and a photovoltaic converter, and combining them.
第１図は本考案の実施例を示す回路図であり、
入力端子１とアースとの間にコンデンサ分圧器と
して、容量C1なる主コンデンサ２、容量C2なる
サージ電圧分圧用コンデンサ（以下サージ分圧コ
ンデンサと略記する）３および容量C3なる商用
周波電圧分圧用コンデンサ（以下商用周波分圧コ
ンデンサと略記する）４が直列接続されている。
FIG. 1 is a circuit diagram showing an embodiment of the present invention,
As a capacitor voltage divider between input terminal 1 and ground, there are a main capacitor 2 with a capacity of C 1 , a surge voltage dividing capacitor (hereinafter abbreviated as surge voltage dividing capacitor) 3 with a capacity of C 2 , and a commercial frequency voltage with a capacity of C 3 . Voltage dividing capacitors (hereinafter abbreviated as commercial frequency voltage dividing capacitors) 4 are connected in series.
サージ分圧コンデンサ３にはコンデンサ５ａと
リアクトル５ｂとの直列共振回路６が並列接続さ
れ、さらに抵抗７を経て、２個の発光ダイオード
８ａ，８ｂを逆極性に並列接続してなる発光回路
９が並列接続されている。 A series resonant circuit 6 consisting of a capacitor 5a and a reactor 5b is connected in parallel to the surge voltage dividing capacitor 3, and through a resistor 7, a light emitting circuit 9 is formed by connecting two light emitting diodes 8a and 8b in parallel with opposite polarities. connected in parallel.
なお、上記抵抗７は発光ダイオード８ａ，８ｂ
の限流用のものである。また上記発光回路９に
は、直列接続された直流電源と抵抗の２組を互い
に逆極性に並列接続してなるしきい値補正回路１
０を並列接続し、各発光ダイオード８ａ，８ｂに
例えば5mA程度の直流電流すなわちバイアス電
流を流して発光に至るしきい値を補正し、各発光
ダイオードが予め発光直前の状態になるようにし
ている。 Note that the resistor 7 is connected to light emitting diodes 8a and 8b.
It is for current limiting use. Further, the light emitting circuit 9 includes a threshold value correction circuit 1 formed by connecting two sets of a DC power supply and a resistor connected in series in parallel with each other with opposite polarities.
0 are connected in parallel, and a DC current of, for example, about 5 mA, ie, a bias current, is applied to each light emitting diode 8a, 8b to correct the threshold value for emitting light, so that each light emitting diode is in a state immediately before emitting light. .
次に、商用周波分圧コンデンサ４はリアクトル
１１ならびに上記抵抗７と同様に発光ダイオード
の限流用抵抗１２を経て、上記発光回路９および
しきい値補正回路１０と同様の構成になる発光回
路１３およびしきい値補正回路１４を並列接続さ
れている。 Next, the commercial frequency voltage dividing capacitor 4 passes through a reactor 11 and a current limiting resistor 12 of the light emitting diode, similar to the resistor 7, and then a light emitting circuit 13 and a light emitting circuit 13 having the same configuration as the light emitting circuit 9 and the threshold correction circuit 10, Threshold correction circuits 14 are connected in parallel.
この場合、上記リアクトル１１はインダクタン
ス値Ｌを、商用周波に対して容量C〓（ただし、C〓
＝C1＋C3）と共振するように、すなわち
Ｌ＝１／C〓（2πf）2
となるように定める。 In this case, the reactor 11 changes the inductance value L to the commercial frequency by the capacitance C〓 (however, C〓
= C1 + C3 ), that is, L=1/C〓(2πf) 2 .
これらの発光回路９，１３の発光は、それぞれ
光信号として光フアイバ１５，１６を介し光電圧
変換器１７，１８に加わり、電気信号に変換され
加算増幅器１９に加わる。 The light emitted from these light emitting circuits 9 and 13 is applied as optical signals to photovoltage converters 17 and 18 via optical fibers 15 and 16, respectively, where it is converted into an electrical signal and applied to a summing amplifier 19.
ここでサージ電圧成分について説明すると、サ
ージ分圧コンデンサ３には上述したように共振周
波数が商用周波数に等しい直列共振回路６が並列
接続されているため、入力端子１より加えられた
入力電圧のうち、商用周波成分の電圧に対しては
該分圧コンデンサ３は短絡状態となる。 To explain the surge voltage component here, as mentioned above, the series resonant circuit 6 whose resonant frequency is equal to the commercial frequency is connected in parallel to the surge voltage dividing capacitor 3. , the voltage dividing capacitor 3 is short-circuited for the voltage of the commercial frequency component.
また商用周波分圧コンデンサ４に対してサージ
周波成分はリアクトル１１により阻止されるた
め、入力電圧のうちでサージ電圧成分については
商用周波分圧コンデンサ４は主コンデンサ２と直
列接続されたことにる。 Also, since the surge frequency component is blocked by the reactor 11 against the commercial frequency voltage dividing capacitor 4, the commercial frequency voltage dividing capacitor 4 is connected in series with the main capacitor 2 for the surge voltage component of the input voltage. .
よつて第１図の回路は、
C1′＝C1・C3／C1＋C3
なる容量値のコンデンサ２′を主コンデンサとす
る第２図の回路で近似される。Therefore, the circuit of FIG. 1 can be approximated by the circuit of FIG. 2 in which the main capacitor is capacitor 2' having a capacitance of C 1 '=C 1 ·C 3 /C 1 +C 3 .
従つて、入力端子１より加わつた入力電圧のう
ち、サージ電圧成分esは主コンデンサ２′とサー
ジ分圧コンデンサ３により分圧され、
es×C1′／（C1′＋C2）
となる。 Therefore, out of the input voltage applied from the input terminal 1, the surge voltage component e s is divided by the main capacitor 2' and the surge voltage dividing capacitor 3, and becomes e s ×C 1 '/(C 1 '+C 2 ). Become.
この分圧されたサージ周波成分は端子Ａ，
A′より限流抵抗７を経て発光回路９に加わり、
発光ダイオード８ａ，８ｂは上記電圧に比例した
強度で発光する。 This voltage-divided surge frequency component is transmitted to terminal A,
From A', it is connected to the light emitting circuit 9 via the current limiting resistor 7,
The light emitting diodes 8a and 8b emit light with an intensity proportional to the voltage.
一方、商用周波成分については、上述したよう
にサージ分圧コンデンサ３は商用周波成分に対し
て短絡状態となるため、第１図の回路は等価的に
第３図のようになる。 On the other hand, regarding the commercial frequency component, the surge voltage dividing capacitor 3 is short-circuited with respect to the commercial frequency component as described above, so that the circuit of FIG. 1 equivalently becomes as shown in FIG. 3.
この場合、リアクトル１１は上述したように、
商用周波数で主コンデンサ２と商用周波分圧コン
デンサ４との静電容量の和と共振するようにイン
ダクタンスを定めてあるため、入力電圧のうち、
商用周波成分ｅのサージ、商用周波の各分圧コン
デンサ２，４による分圧電圧はリアクトル１１に
妨げられることなく端子Ｂ，B′より抵抗１２を
経て発光回路１３に加わり、発光ダイオード２０
ａおよび２０ｂは、ほぼ上記分圧電圧に比例した
強度で発光する。 In this case, the reactor 11 is as described above.
Since the inductance is set so that it resonates with the sum of the capacitances of the main capacitor 2 and the commercial frequency voltage dividing capacitor 4 at the commercial frequency, of the input voltage,
The surge of the commercial frequency component e and the voltage divided by the voltage dividing capacitors 2 and 4 of the commercial frequency are not hindered by the reactor 11 and are applied to the light emitting circuit 13 from the terminals B and B' via the resistor 12, and the light emitting diode 20
a and 20b emit light with an intensity approximately proportional to the above-mentioned divided voltage.
このようにして各取出されたサージ周波成分お
よび商用周波成分の各光信号は光フアイバ１５，
１６を通じて伝送され、光電圧変換器１７，１８
において光電変換され、加算増幅器１９で加算、
増幅され、出力端子２１より各電圧値が得られる
と共に、さらにオシログラフ等を用いて原波形を
再現することができる。 The optical signals of the surge frequency component and the commercial frequency component extracted in this way are transmitted to the optical fiber 15,
16 and optical voltage converters 17, 18
photoelectrically converted and added in a summing amplifier 19,
The signal is amplified and each voltage value is obtained from the output terminal 21, and the original waveform can be further reproduced using an oscilloscope or the like.
かくして商用周波電圧および重畳したサージ電
圧、さらにその波形を同時に測定、観察すること
が可能となり、かつ各発光回路９，１３と光電圧
変換器１７，１８との間は光フアイバ１５，１６
によつて伝送することにより外部からのノイズの
侵入を防止し、正確なサージ波形を得ることがで
きる。 In this way, it is possible to simultaneously measure and observe the commercial frequency voltage, the superimposed surge voltage, and their waveforms, and optical fibers 15, 16 are connected between each light emitting circuit 9, 13 and the photovoltage converter 17, 18.
By transmitting the waveform through the , it is possible to prevent the intrusion of noise from the outside and obtain an accurate surge waveform.
以上説明したように本考案によるときは、外部
からのノイズ侵入のおそれはなく、商用周波電圧
および重畳されたサージ周波電圧ならびに各波形
を同時に測定、観察することができる。
As explained above, according to the present invention, there is no fear of noise intrusion from the outside, and the commercial frequency voltage, the superimposed surge frequency voltage, and each waveform can be measured and observed simultaneously.
第１図は本考案の実施例を示す回路図、第２図
は上記回路のサージ周波成分に対する等価回路
図、第３図は同じく商用周波成分に対する等価回
路図である。
１……入力端子、２……主コンデンサ、３……
サージ分圧コンデンサ、４……商用周波分圧コン
デンサ、５ａ……コンデンサ、５ｂ，１１……リ
アクトル、６……直列共振回路、７，１２……抵
抗、８ａ，８ｂ，２０ａ，２０ｂ……発光ダイオ
ード、９……発光回路、１３……発光回路、１５
……光フアイバ、１７，１８……光電圧変換器、
１９……加算増幅器。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is an equivalent circuit diagram for the surge frequency component of the above circuit, and FIG. 3 is an equivalent circuit diagram for the commercial frequency component. 1...Input terminal, 2...Main capacitor, 3...
Surge voltage dividing capacitor, 4...Commercial frequency voltage dividing capacitor, 5a...Capacitor, 5b, 11...Reactor, 6...Series resonance circuit, 7, 12...Resistor, 8a, 8b, 20a, 20b...Light emission Diode, 9... Light emitting circuit, 13... Light emitting circuit, 15
...Optical fiber, 17,18...Photovoltage converter,
19...Summing amplifier.
Claims (1)
ンデンサとサージ電圧分圧用コンデンサおよび商
用周波電圧分圧用コンデンサと、上記サージ電圧
分圧用コンデンサに並列接続され互いに直列接続
されたコンデンサと第１のリアクトルよりなり商
用周波数に等しい共振周波数を有する回路と、上
記サージ電圧分圧用コンデンサに第１の抵抗を介
して並列接続され互いに逆極性に並列接続された
２個の発光ダイオードを備えた第１の発光回路
と、上記商用電圧分圧用コンデンサに第２のリア
クトルおよび第２の抵抗を介して並列接続され互
いに逆極性に接続された２個の発光ダイオードを
備えた第２の発光回路と、上記第１および第２の
発光回路よりそれぞれ光フアイバを介して接続さ
れた第１および第２の光電圧変換器と、上記第１
および第２の光電圧変換器より入力を加えられる
加算増幅器とを具備し、上記第１および第２の抵
抗は上記第１および第２の発光回路の発光素子の
限流作用を行ない、上記第２のリアクトルは上記
主コンデンサと商用周波電圧分圧用コンデンサの
各静電容量の和との共振周波数が商用周波数に等
しいインダクタンスを有することを特徴とする電
圧変成器。 A main capacitor, a surge voltage dividing capacitor, and a commercial frequency voltage dividing capacitor connected in series between the input terminal and the ground, and a capacitor and a first reactor connected in parallel to the surge voltage dividing capacitor and connected in series with each other. a circuit having a resonant frequency equal to the commercial frequency, and two light emitting diodes connected in parallel to the surge voltage dividing capacitor via a first resistor and having opposite polarities to each other. a second light emitting circuit comprising two light emitting diodes connected in parallel to the commercial voltage dividing capacitor via a second reactor and a second resistor and having opposite polarities to each other; and a first and second photovoltage converter each connected to a second light emitting circuit via an optical fiber;
and a summing amplifier to which an input is applied from a second photovoltage converter, the first and second resistors perform a current limiting action on the light emitting elements of the first and second light emitting circuits, and A voltage transformer characterized in that the reactor of No. 2 has an inductance such that the resonant frequency of the sum of capacitances of the main capacitor and the commercial frequency voltage dividing capacitor is equal to the commercial frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15518486U JPH041506Y2 (en) | 1986-10-09 | 1986-10-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15518486U JPH041506Y2 (en) | 1986-10-09 | 1986-10-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6360968U JPS6360968U (en) | 1988-04-22 |
| JPH041506Y2 true JPH041506Y2 (en) | 1992-01-20 |
Family
ID=31075662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15518486U Expired JPH041506Y2 (en) | 1986-10-09 | 1986-10-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH041506Y2 (en) |
-
1986
- 1986-10-09 JP JP15518486U patent/JPH041506Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360968U (en) | 1988-04-22 |
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