JPH0257231U - - Google Patents
Info
- Publication number
- JPH0257231U JPH0257231U JP13426688U JP13426688U JPH0257231U JP H0257231 U JPH0257231 U JP H0257231U JP 13426688 U JP13426688 U JP 13426688U JP 13426688 U JP13426688 U JP 13426688U JP H0257231 U JPH0257231 U JP H0257231U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- protection element
- gas alarm
- surge protection
- control unit
- 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
- 238000010586 diagram Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
Description
第１図はこの考案の第一実施例による電気的構
成を示すブロツク図、第２図は同第二実施例によ
る電気的構成を示すブロツク図、第３図はこの考
案が適用されるガス検針システムに耐雷アダプタ
ーを付加した場合におけるシステムの構成を示す
ブロツク図、第４図は耐雷アダプターの電気的構
成を示す回路図である。
２０……通信回線、２１……商用電源、５０…
…ガス警報器、５２……コントロールユニツト、
５６……ガス警報回路部、６２……ガスセキユリ
テイシステム回路部、６４……アレスタ（防護素
子）、６６……ヒユーズ（防護素子）、６８……
バリスタ（防護素子）。
Figure 1 is a block diagram showing the electrical configuration according to the first embodiment of this invention, Figure 2 is a block diagram showing the electrical configuration according to the second embodiment of the invention, and Figure 3 is a gas meter detector to which this invention is applied. A block diagram showing the configuration of the system when a lightning protection adapter is added to the system, and FIG. 4 is a circuit diagram showing the electrical configuration of the lightning protection adapter. 20...Communication line, 21...Commercial power supply, 50...
...Gas alarm, 52...Control unit,
56...Gas alarm circuit section, 62...Gas security system circuit section, 64...Arrester (protective element), 66...Fuse (protective element), 68...
Varistor (protective element).
Claims (1)
に接続されるコントロールユニツトとを備えた検
針システムにおいて、前記ガス警報器の商用電源
との接続端にサージ防護素子を設け、該サージ防
護素子の接地端を前記コントロールユニツト内に
設けたサージ防護素子の接地端に接続し、電源ま
たは通信回線上に侵入した外来サージを、それぞ
れに設けられた回路部の前段において接地側にバ
イパスさせるようにしたことを特徴とする検針シ
ステム用ガス警報器。 In a meter reading system equipped with a gas alarm connected to a commercial power supply and a control unit connected to a communication line, a surge protection element is provided at the connection end of the gas alarm to the commercial power supply, and the surge protection element is The grounding end is connected to the grounding end of a surge protection element provided in the control unit, so that external surges that enter the power supply or communication line are bypassed to the grounding side at the front stage of the circuit section provided in each. A gas alarm for a meter reading system characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13426688U JPH0257231U (en) | 1988-10-14 | 1988-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13426688U JPH0257231U (en) | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0257231U true JPH0257231U (en) | 1990-04-25 |
Family
ID=31392869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13426688U Pending JPH0257231U (en) | 1988-10-14 | 1988-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257231U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57193934A (en) * | 1981-05-25 | 1982-11-29 | Nippon Telegraph & Telephone | Lightning surge protecting circuit |
| JPS61220096A (en) * | 1985-03-26 | 1986-09-30 | 三菱電機株式会社 | Emergency alarm |
-
1988
- 1988-10-14 JP JP13426688U patent/JPH0257231U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57193934A (en) * | 1981-05-25 | 1982-11-29 | Nippon Telegraph & Telephone | Lightning surge protecting circuit |
| JPS61220096A (en) * | 1985-03-26 | 1986-09-30 | 三菱電機株式会社 | Emergency alarm |
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