JPH0216657B2 - - Google Patents
Info
- Publication number
- JPH0216657B2 JPH0216657B2 JP56208584A JP20858481A JPH0216657B2 JP H0216657 B2 JPH0216657 B2 JP H0216657B2 JP 56208584 A JP56208584 A JP 56208584A JP 20858481 A JP20858481 A JP 20858481A JP H0216657 B2 JPH0216657 B2 JP H0216657B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistance element
- electrical equipment
- dependent resistance
- power supply
- 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 - Lifetime
Links
- 230000001419 dependent effect Effects 0.000 claims description 13
- 229910052754 neon Inorganic materials 0.000 claims description 5
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
本発明はテレビジヨン受像機等の電気機器の交
流電源ラインに入つて来るサージ電圧から電気機
器を保護する装置に関するものであり、電気機器
の負荷で発生する不要輻射が、保護用の電圧依存
性抵抗素子を介して商用電源ラインに流れ出るの
を防止しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for protecting electrical equipment such as a television receiver from surge voltages entering the AC power line of the electrical equipment, and the present invention relates to a device for protecting electrical equipment such as a television receiver from surge voltages entering the AC power line of the equipment. This is intended to prevent the voltage from flowing into the commercial power supply line via a protective voltage-dependent resistance element.
第１図は従来例における電気機器の保護装置を
示すものであり、商用交流電源ラインに接続され
る有極性プラグ１の一端子はヒユーズ３を介して
ラインフイルタ５に接続されている。上記プラグ
１の接地側端子２もラインフイルタ５に接続され
ている。このラインフイルタ５は整流回路６を介
してテレビジヨン受像機回路等の負荷に接続され
ている。そして、ヒユーズ３とラインフイルタ５
との接続点とアース間に電圧依存性抵抗素子４が
接続されている。この電圧依存性抵抗素子４の電
圧−電流特性は第３図に示すように電圧が規定値
（図では250ボルト）以上の電圧が加わるとインピ
ーダンスが小さくなるものである。したがつて商
用電源ラインに乗つて来るサージ電圧を吸収し、
電気機器を保護するものである。一方、ラインフ
イルタ５は整流回路６や、負荷７で発生する有毒
な不要輻射が商用電源ラインに流れ出ないように
阻止するためのものである。ところが、電圧依存
性抵抗素子４は導通していない時、すなわち250
ボルト以下では電極間に数1000PFの静電容量を
持つており、負荷７のアース回路より電圧依存抵
抗素子４を通して商用電源ラインに不要輻射がも
れ出てしまう欠点がある。 FIG. 1 shows a conventional protection device for electrical equipment, in which one terminal of a polarized plug 1 connected to a commercial AC power line is connected to a line filter 5 via a fuse 3. The ground terminal 2 of the plug 1 is also connected to the line filter 5. This line filter 5 is connected via a rectifier circuit 6 to a load such as a television receiver circuit. And fuse 3 and line filter 5
A voltage dependent resistance element 4 is connected between the connection point and ground. As shown in FIG. 3, the voltage-current characteristic of this voltage-dependent resistance element 4 is such that the impedance decreases when a voltage equal to or higher than a specified value (250 volts in the figure) is applied. Therefore, it absorbs the surge voltage that comes on the commercial power line,
It protects electrical equipment. On the other hand, the line filter 5 is used to prevent toxic unnecessary radiation generated by the rectifier circuit 6 and the load 7 from flowing into the commercial power supply line. However, when the voltage dependent resistance element 4 is not conducting, that is, 250
At voltages below volts, the capacitance between the electrodes is several thousand PF, and there is a drawback that unnecessary radiation leaks from the ground circuit of the load 7 through the voltage-dependent resistance element 4 to the commercial power line.
本発明は上記欠点を除去しようとするものであ
り、以下本発明の一実施例について図面を参照し
て説明する。第２図は本発明の一実施例である
が、第１図と同一物は同一番号を付して説明を省
略する。この回路の特徴は電圧依存性抵抗素子４
と直列にネオンランプ８を接続したことにある。 The present invention aims to eliminate the above-mentioned drawbacks, and one embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows one embodiment of the present invention, and the same parts as those in FIG. 1 are given the same numbers and their explanation will be omitted. The feature of this circuit is that the voltage dependent resistance element 4
This is because a neon lamp 8 is connected in series with .
ネオンランプ８の放電開始電圧は電圧依存抵抗
素子４に閾値よりも低い電圧値とする。ネオンラ
ンプ８の電極間容量は数PF程度しかないので、
電圧依存抵抗素子４と直列に接続することによ
り、合成静電容量は数PF以下になる。したがつ
て負荷７で発生した不要輻射が商用電源ラインへ
出てゆくことはなくなるものである。 The discharge starting voltage of the neon lamp 8 is set to a voltage value lower than the threshold value of the voltage dependent resistance element 4. Since the interelectrode capacitance of neon lamp 8 is only about a few PF,
By connecting it in series with the voltage-dependent resistance element 4, the combined capacitance becomes several PF or less. Therefore, unnecessary radiation generated in the load 7 is prevented from going out to the commercial power supply line.
以上のように本発明によればサージ保護用の電
圧依存抵抗素子と直列にネオンランプを接続する
ことにより負荷で発生する不要輻射がアース側か
ら電圧依存性抵抗素子を通つて商用電源ラインに
出るのを防止することができるものである。 As described above, according to the present invention, by connecting a neon lamp in series with a voltage-dependent resistive element for surge protection, unnecessary radiation generated in the load exits the commercial power line from the ground side through the voltage-dependent resistive element. It is possible to prevent this.
第１図は従来例における電気機器の保護装置の
回路図、第２図は本発明の一実施例における電気
機器の保護装置の回路図、第３図は電圧依存抵抗
素子の特性図である。
１……プラグ、４……電圧依存抵抗素子、５…
…ラインフイルタ、６……整流回路、７……負
荷。
FIG. 1 is a circuit diagram of a conventional electrical equipment protection device, FIG. 2 is a circuit diagram of an electrical equipment protection device according to an embodiment of the present invention, and FIG. 3 is a characteristic diagram of a voltage dependent resistance element. 1...Plug, 4...Voltage dependent resistance element, 5...
...Line filter, 6... Rectifier circuit, 7... Load.
Claims (1)
間にラインフイルタを挿入し、上記交流電源入力
端子と上記電源回路に接続される負荷のアース回
路との間に電圧依存抵抗素子と不要輻射阻止用の
ネオンランプとの直列回路を接続した電気機器の
保護装置。1. A line filter is inserted between the AC power input terminal of the electrical equipment and the power supply circuit, and a voltage-dependent resistance element and unnecessary radiation prevention are installed between the AC power input terminal and the earth circuit of the load connected to the power supply circuit. A protection device for electrical equipment connected in series with a neon lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20858481A JPS58108925A (en) | 1981-12-22 | 1981-12-22 | Device for protecting electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20858481A JPS58108925A (en) | 1981-12-22 | 1981-12-22 | Device for protecting electric equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58108925A JPS58108925A (en) | 1983-06-29 |
| JPH0216657B2 true JPH0216657B2 (en) | 1990-04-17 |
Family
ID=16558600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20858481A Granted JPS58108925A (en) | 1981-12-22 | 1981-12-22 | Device for protecting electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58108925A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122852A (en) * | 1976-04-08 | 1977-10-15 | Matsushita Electric Works Ltd | Surge absorption circuit in electic machine |
| JPS5532656B2 (en) * | 1977-12-23 | 1980-08-26 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532656U (en) * | 1978-08-24 | 1980-03-03 |
-
1981
- 1981-12-22 JP JP20858481A patent/JPS58108925A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122852A (en) * | 1976-04-08 | 1977-10-15 | Matsushita Electric Works Ltd | Surge absorption circuit in electic machine |
| JPS5532656B2 (en) * | 1977-12-23 | 1980-08-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58108925A (en) | 1983-06-29 |
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