JPS58108925A - Device for protecting electric equipment - Google Patents
Device for protecting electric equipmentInfo
- Publication number
- JPS58108925A JPS58108925A JP20858481A JP20858481A JPS58108925A JP S58108925 A JPS58108925 A JP S58108925A JP 20858481 A JP20858481 A JP 20858481A JP 20858481 A JP20858481 A JP 20858481A JP S58108925 A JPS58108925 A JP S58108925A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistance element
- electrical equipment
- dependent resistance
- electric equipment
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はテレビジョン受像機等の電気機器の交流電源ラ
インに入っ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シ、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. The purpose is to prevent this from flowing into the commercial power supply line through the 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を介してラインフィルタ６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
ィルタ６に接続されている。このラインフィルタ６は整
流回路６を介してテレビジョ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とラインフィルタ６
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２６０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。したがって商用電源ラインに乗って来るサ
ージ電圧を吸収し、電気機器を保護するものである。一
方、ラインフィルタ６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の静電容量を持っており、
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 6 via a fuse 3. The ground terminal 2 of the plug 1 is also connected to the line filter 6. This line filter 6 is connected to a load such as a television receiver circuit via a rectifier circuit 6. And fuse 3 and line filter 6
A voltage dependent resistance element 4 is connected between the connection point and ground. As shown in FIG. 3, the voltage-current characteristic of the voltage-dependent resistance element 4 is such that the impedance decreases when a voltage higher than a specified value (260 volts in the figure) is applied. Therefore, it protects electrical equipment by absorbing surge voltage that comes on the commercial power line. On the other hand, the line filter 6 is used to prevent toxic unnecessary radiation generated by the rectifier circuit 6 and the load 7 from flowing into the commercial power line. However, when the voltage-dependent resistance element 4 is not conducting, that is, below 250 volts, it has a capacitance of several thousand PF between the electrodes.
There is a drawback that unnecessary radiation leaks from the ground circuit of the load 7 to the commercial power line through the voltage dependent resistance element 4.
本発明は上記欠点を除去しようとするものであリ、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 in FIG. 1 are given the same numbers and their explanation will be omitted. The feature of this circuit is that a neon lamp 8 is connected in series with the voltage dependent resistance element 4.
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シ。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 the neon lamp 8 is only about a few PF, it is recommended to connect it in series with the voltage dependent resistance element 4.
合成静電容量は数ＰＦ以下になる。したがって負荷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 combined capacitance will be several PF or less. Therefore, unnecessary radiation generated in the load 7 is prevented from going out to the commercial power 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
を通っ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 from the ground side through the voltage-dependent resistive element to the commercial power line. 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、６・・・・・・ラインフィルタ、６・・・・・・整
流回路、７・・・・・・負荷。Figure 1 is a circuit diagram of a conventional protection device for electrical equipment.
FIG. 2 is a circuit diagram of a protection device for electrical equipment 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, 6... Line filter, 6... Rectifier circuit, 7... Load.
Claims (1)
フィルタを挿入し、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との一間に電圧依存抵抗素
子と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。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 a neon lamp are connected between the AC power input terminal and the ground of the load connected to the power supply circuit. Protective device for electrical equipment connected in series circuits.
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 true JPS58108925A (en) | 1983-06-29 |
| JPH0216657B2 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 |
| JPS5532656U (en) * | 1978-08-24 | 1980-03-03 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2757750C3 (en) * | 1977-12-23 | 1982-04-01 | Bfg Glassgroup, Paris | Heat-reflecting disk with TiO ↓ 2 ↓ layer in rutile modification and process for its production |
-
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 |
| JPS5532656U (en) * | 1978-08-24 | 1980-03-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0216657B2 (en) | 1990-04-17 |
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