JPS6355382A - Device for processing operation in parallel of pumps - Google Patents
Device for processing operation in parallel of pumpsInfo
- Publication number
- JPS6355382A JPS6355382A JP20064386A JP20064386A JPS6355382A JP S6355382 A JPS6355382 A JP S6355382A JP 20064386 A JP20064386 A JP 20064386A JP 20064386 A JP20064386 A JP 20064386A JP S6355382 A JPS6355382 A JP S6355382A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- relay
- timer
- pumps
- abnormality
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 230000005856 abnormality Effects 0.000 claims abstract description 38
- 230000002159 abnormal effect Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 36
- 230000007257 malfunction Effects 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000005284 excitation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 101100025412 Arabidopsis thaliana XI-A gene Proteins 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は排水設備に設けたポンプの並列運転処理装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a parallel operation treatment device for pumps installed in drainage equipment.
［背景技術］
通常ビル等め排水設備は一つの水槽に２台のポンチを設
置し、自動交１ｉ運転するのが一般的である。これは平
誉時は２台のポンプを交互に３！！松し、一方の□ポン
プが故障したときには残された１台の□ポンプの運転を
ｍ続させながらその間に故障を修理するというもので、
システムの信頼性を確保するものである。[Background Art] Normally, in drainage equipment for buildings, etc., two punches are installed in one water tank, and the two punches are operated automatically. This is 3 times when the two pumps are alternately used! ! If one of the □ pumps breaks down, the remaining □ pump will continue to operate while the failure is repaired.
This ensures the reliability of the system.
ところ°で最゛近の傾向として、軽負荷時は従来通り、
１台のポンチで対応し、大雨による排水タンクへの接水
流入量が増加の場合はｆｆｌ負荷として２台のポンプを
並列運転させる要望が多くなった。However, the latest trend is that under light loads, as before,
There has been an increasing demand for one pump to handle this problem, and to operate two pumps in parallel as an ffl load when the amount of water flowing into the drainage tank increases due to heavy rain.
第４図は従来のポンプ運転処理Ｈｅの概略もが成図を示
しており、この装置では排水タンク１に４本の液位検出
電極を設けて、下端が最下位の検出′ｌｉｉ極を共通電
極ＥＬとし、下端が最上位の検出電極を異常液位検出電
極Ｅ０とし、その間を制御電極Ｅ、、Ｅ２とするもので
、これらの電極Ｅ０〜Ｅ。Fig. 4 shows a schematic diagram of the conventional pump operation processing He. In this device, four liquid level detection electrodes are provided in the drain tank 1, and the detection 'lii electrode whose lower end is the lowest one is commonly used. The electrode EL is the uppermost detection electrode at the lower end, and the abnormal liquid level detection electrode E0 is the abnormal liquid level detection electrode E0.The electrodes E0 to E2 are the control electrodes E, E2.
はフロートレス制御向路２に接続され、電極間の抵抗変
化により液位が検出されるようになっている。is connected to the floatless control path 2, and the liquid level is detected by the resistance change between the electrodes.
この７０−トレス制御ｌｌＩ装置２は液位が制御電極Ｅ
２以下であればポンプ停止制御を行い、液位が制御電極
Ｅ、に至ると電源端Ｃと出力端Ａとの間を接続してポン
プの制御信号を出力ｌＩＡより自動駆動リレー装Ｗ１３
へ制御電極Ｅ、より低く液位が低下するまで出力し、更
に液位異常検出電極Ｅ０に至ると異常報知回路用の異常
検出信号を出力端Ｂより発生させるようになっている。In this 70-trace control II device 2, the liquid level is set at the control electrode E.
If the liquid level is less than 2, the pump is stopped, and when the liquid level reaches the control electrode E, the power supply terminal C and the output terminal A are connected and the pump control signal is output from the automatic drive relay device W13.
The control electrode E outputs an output until the liquid level drops lower, and when the liquid level reaches the abnormality detection electrode E0, an abnormality detection signal for the abnormality notification circuit is generated from the output terminal B.
つまり、自動交互リレー装置３は上記出力ｊｌＡより、
切換スイッチＳＷ、と、交互運転選択切換スイッチＳＷ
２とを介して制御信号が電源ｊｌａ％及び制御入力端す
に入力すると、電源ｙＩＩａと接地端Ｃとの間に接続し
である内蔵リレーが制御信号により励磁されて動′作し
、そのリレー接点がａＲ１子またはｂ端子に切替わり、
リレー接点を通して出力ｊｉｉｄ又はｅに制御入力端す
に入力した制御信号を出力する。In other words, the automatic alternating relay device 3 receives the output jlA from the above output jlA.
Changeover switch SW, and alternate operation selection changeover switch SW
When a control signal is input to the power supply jla% and the control input terminal via The contact switches to aR1 or b terminal,
The control signal input to the control input terminal is outputted to the output jiid or e through the relay contact.
これら出力端ｄ、ｅは夫々ポンプ運転月の電磁接触器の
励磁コイル５ｍ、５ｂにサーマルリレーの接点６ ｊｌ
ｔ ６ ｂを通じて接地されており、制御信号がを励磁
し、電磁接触器を動作させ、その電磁接触器の接点を通
じてポンプに駆動電源を接続するのである。These output terminals d and e are the excitation coils 5m and 5b of the electromagnetic contactor during pump operation, respectively, and the contacts 6jl of the thermal relay.
It is grounded through t 6 b, and a control signal excites it, operates the magnetic contactor, and connects the driving power source to the pump through the contact of the magnetic contactor.
そして自動交互リレー装ｒａ３は制御入力端すに制御信
号が入力する毎に内蔵リレーのリレー接点をａｌ子とｂ
端子との間で交互に切換え、運転するポンプを交互に切
り換えるようになっている。しかしながらこの従来例で
は異常検出電極Ｅ、に液位が至ると、７０−トレス制御
装ｆｉ２が出力端Ｂより異常検出信号を出力し、異常表
示ランプＬ１とブザーＢｚを駆動するだけで、２台のポ
ンプを並列運転することはなかった。The automatic alternating relay system RA3 connects the relay contacts of the built-in relay to AL and B every time a control signal is input to the control input terminal.
The terminals are switched alternately, and the pump to be operated is alternately switched. However, in this conventional example, when the liquid level reaches the abnormality detection electrode E, the 70-Trace control device fi2 outputs an abnormality detection signal from the output terminal B, and simply drives the abnormality display lamp L1 and the buzzer Bz. pumps were never operated in parallel.
従ってこの従来例では異常増水時に多量の水を排水出来
ず、排水タンク１より水がはふれ出るという恐れがあっ
た。尚図中ランプＬ ２ａ＋ Ｌ ２ｂは夫々運転表示
ランプであり、対応する電磁接触器の常開接点ｒａ＋、
ｒｂｌがオンすると通電されるようになっている。ラン
プＬ ３ａｔ Ｌ ｓｂは運転停止表示ランプであり、
対応する電磁接触器の常閉接点ｒａ２゜ｒｂ、がオンす
ると通電されるようになっている。Therefore, in this conventional example, a large amount of water cannot be drained when the water rises abnormally, and there is a fear that water may overflow from the drain tank 1. In addition, the lamps L 2a + L 2b in the figure are operation indicator lamps, respectively, and the normally open contacts ra +,
When rbl is turned on, it is energized. Lamp L3at Lsb is an operation stop indicator lamp,
When the normally closed contact ra2°rb of the corresponding electromagnetic contactor is turned on, electricity is applied.
更にランプＬ４ａ、Ｌ４ｂは夫々の電磁接触器の励磁コ
イル５ｇ、５ｂに直列に挿入されたサーマルリレーがポ
ンプの異常時にながれろ過大電流により接点Ｇ ａ、
６ ｂを常開側に切換えたときに通電される異常表示ラ
ンプである。Furthermore, the lamps L4a and L4b are connected to contacts G a by a large current flowing through the thermal relays inserted in series with the excitation coils 5g and 5b of the respective electromagnetic contactors when the pump is abnormal.
This is an abnormality indicator lamp that is energized when 6b is switched to the normally open side.
又スイッチＳＷコはブザーＢｚの鳴動停止スイッチであ
る。Further, the switch SW is a switch for stopping the sound of the buzzer Bz.
ところで上述の問題点に鑑みて為されたのが第５図の装
置である。この装置では７０−トレス制御装置２の出力
端ＢにリレーＸ１を接吟するとともに自動交互リレーＷ
ｃ置３の電源端ａと接地端Ｃとの間にリレーＸ１を接続
し、リレーＸ１のリレー接点Ｘｌ＆とリレー接点ｘ２ａ
との直列回路を出力端ｄ、ｅ間に接続したもので、通常
時には制御信号によりリレーＸｌを駆動してリレー接点
ｘ＋ｂを通じて制御信号を自動交互リレー装置３に入力
させて第４図回路と同様な自動交互運転を行い、異常増
水時にはフロートレス装置２の出力端Ｂからの異常検出
信号によりリレーＸ２を動作させてそのリレー接点Ｘ２
ｂ″Ｃ自己保持を図り、リレー接点ｘ２ａとリレーＸＩ
のリレー接点ｘｌａとの直列回路で電磁接触器の励磁コ
イル５ ａｔ Ｓ ｂのいずれにも制御信号を与えポン
プの並列運転を行えるようになっている。By the way, the device shown in FIG. 5 was developed in view of the above-mentioned problems. In this device, a relay X1 is connected to the output terminal B of the 70-trace control device 2, and an automatic alternating relay W
Connect relay X1 between power terminal a and ground terminal C of position 3, and connect relay contact Xl& of relay X1 and relay contact x2a.
A series circuit is connected between output terminals d and e. Normally, the control signal drives relay Xl, and the control signal is input to automatic alternating relay device 3 through relay contacts x+b, similar to the circuit in Figure 4. When the water rises abnormally, the relay X2 is activated by the abnormality detection signal from the output terminal B of the floatless device 2, and the relay contact X2 is activated.
b''C For self-holding, relay contact x2a and relay XI
A control signal is given to both of the excitation coils 5 at S b of the electromagnetic contactor in a series circuit with the relay contact xla, so that the pumps can be operated in parallel.
しかしながらこの装置では並列運転の開始と同時にブザ
ーＢｚの鳴動が行なわれ、異常報知が行なわれてし鷹う
という問題がある。そこで警報用の液位を第６図に示す
ように検出する電極Ｅ４を設けて、並列運転を行っても
電極Ｅ、に液位が上昇した場合にフロートレス制御装ｒ
！ｔ２がこれを検知して出力ｊｌＢ、Ｄより信号を出す
装置も提案されているが、しかしながらこの装置の場合
液位検出のセンサが大形化する上にコストが高くなり、
更にセンサからの配線及びタンクでの電極の設定工数が
多くなるという問題がある。However, with this device, there is a problem in that the buzzer Bz sounds at the same time as the start of the parallel operation, and an abnormality notification is issued. Therefore, an electrode E4 is provided to detect the alarm liquid level as shown in Fig. 6, and even if the parallel operation is performed, if the liquid level rises to the electrode E, the floatless control device r
! A device has also been proposed in which t2 detects this and outputs a signal from outputs jlB and D, but in this device, the sensor for detecting the liquid level is large and the cost is high.
Furthermore, there is a problem in that the number of man-hours required for wiring from the sensor and setting electrodes in the tank increases.
尚端子Ｅは接地端子である。Note that terminal E is a ground terminal.
〔発明の目的］
本発明は上述の問題点に鑑みて為されたものでその目的
とするところは、電極数を増加させることなく、重負荷
時にはポンプの自動並列運転を可能とし、且つ並列運転
でも重負荷が解決しない時に初めて異常報知を行うポン
プの並列運転処理装置を提供するにある。[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and its purpose is to enable automatic parallel operation of pumps during heavy loads without increasing the number of electrodes, and to enable automatic parallel operation of pumps without increasing the number of electrodes. However, it is an object of the present invention to provide a parallel operation processing device for pumps that notifies an abnormality only when a heavy load is not resolved.
［発明の開示］
本発明は制御電極間の液位で制御出力を発生し異常液位
に対応して設けた異常液位検出７ｆ１極が液位な検出す
ると異常検出信号を出力する液位検出手段と、液位検出
手段の制御信号で少なくとも２台のポンプを交互に駆動
するとともに異常検出信号で少な（とも２台のポンプを
同時に運転させる交互運転手段と、液位検出手段の異常
検出信号の出力に応動し、タイムアツプ前に異常検出信
号の出力が停止すればリセットされるタイマと、該タイ
マのタイムアツプ時に報知を行う報知手段とを備えたこ
とを特徴とする。[Disclosure of the Invention] The present invention provides a liquid level detection device that generates a control output depending on the liquid level between control electrodes, and outputs an abnormality detection signal when an abnormal liquid level detection 7f1 pole provided in response to an abnormal liquid level detects a liquid level. means for driving at least two pumps alternately using a control signal from the liquid level detecting means, and an abnormality detection signal for the liquid level detecting means for driving at least two pumps at the same time using an abnormality detection signal; The present invention is characterized in that it includes a timer that is reset when the output of the abnormality detection signal stops before time-up in response to the output of the timer, and a notification means that provides notification when the timer times up.
以下実施例により本発明の詳細な説明する。The present invention will be explained in detail below with reference to Examples.
又Ｉ九１
本実施例は第５図従来装置を基本として、第１図に示す
ようにタイマＴ及びリレーＸ、を設けたもので、タイマ
Ｔ及びリレーＸ、を並列に接続し、この並列回路をタイ
マＴのタイマ接点ｔを介して異常表示ランプし、に並列
接続し、更にリレーＸ３のリレー接点Ｘ、をリレー接点
ｘ２ｂに並列に接続してある。Furthermore, this embodiment is based on the conventional device shown in Fig. 5, and is provided with a timer T and a relay X as shown in Fig. 1. The circuit is connected in parallel to an abnormality indicating lamp through timer contact t of timer T, and relay contact X of relay X3 is connected in parallel to relay contact x2b.
しかして制御電極Ｅ２の停止ラインと制御電極Ｅ１の運
転ラインとの間で液位が第２図（ａ）に示すようにある
と液位が制御電極Ｅ、に至ると７０−トレス！Ｉｉ？ｆ
ｆ１２の出力ｒａＡからは第２図（ｂ）に示すように制
御信号を一定時間発生させる。この発生により自動交互
リレー装ｆｉ！３により第２図（ｅ）（ｆ）に示すよう
に２台のポンプの内の一台が運転され、この運転が交互
になされる。If the liquid level is as shown in FIG. 2(a) between the stop line of control electrode E2 and the operating line of control electrode E1, then when the liquid level reaches control electrode E, 70-Tres! Ii? f
From the output raA of f12, a control signal is generated for a certain period of time as shown in FIG. 2(b). Due to this occurrence, the automatic alternate relay system fi! 3, one of the two pumps is operated as shown in FIGS. 2(e) and 2(f), and this operation is performed alternately.
そして液位が制御電極Ｅ２を越えると、制御信号が制御
電極Ｅ２以下になって一定時間経過するまで制御信号を
フロートレス装ｒ！ｉ２は発生させる。When the liquid level exceeds the control electrode E2, the control signal is transmitted to the floatless device until the control signal becomes lower than the control electrode E2 and a certain period of time elapses. i2 is generated.
ここで第２図（ｆ）のように自動交互リレー装置３によ
り第２のポンプが駆動されるが、液位が異常液位検出電
極Ｅ０に至り、第２図（ｂ）に示すように７０−トレス
制御装置３の出力端Ｂより異常検出信号が発生すると、
リレーＸ、及びタイマＴが動作し、リレーＸ、はリレー
接、αＸ、をオンする。Here, as shown in FIG. 2(f), the second pump is driven by the automatic alternate relay device 3, but the liquid level reaches the abnormal liquid level detection electrode E0, and as shown in FIG. - When an abnormality detection signal is generated from the output terminal B of the trace control device 3,
Relay X and timer T operate, and relay X turns on relay contact αX.
このオンによりリレーＸ２が制御信号により動作し、リ
レー接点ｘ２ｂをオンして自己保持し、同時にリレー接
点ｘ２ａをオンし、このリレー接点Ｘｌ’ａとリレーＸ
１のリレー接点ｘｌａとを通じて第１のポンプに対応す
る電磁接触器の励磁コイル５ａにも制御信号が印加され
て第１のポンプも運転される。As a result of this turning on, relay
A control signal is also applied to the excitation coil 5a of the electromagnetic contactor corresponding to the first pump through the first relay contact xla, and the first pump is also operated.
つまり２台のポンプが並列運転されることになる。In other words, two pumps are operated in parallel.
一方タイマＴは動作を＄２図（ｄ）に示すように開始す
るが、このタイムアツプするまではタイマ接点ｔをオフ
状態とするため異常表示ランプＬ１及びブザーＢｚには
第２図（ｇ）に示すよ４に通電されずＷｔｌ報知は為さ
れない。On the other hand, the timer T starts its operation as shown in Figure 2 (d), but until the timer elapses, the timer contact t is kept off, so the abnormality indicator lamp L1 and buzzer Bz are turned on as shown in Figure 2 (g). As shown, power is not supplied to 4, and no Wtl notification is made.
並列運転により液位が制御電極Ｅ１より低くなると、７
０−トレス制御装置２の出力端Ｂよりの異常検出信号が
発生しなくなるので、タイマＴはリセットされ、又リレ
ーＸ、は復帰する。When the liquid level becomes lower than the control electrode E1 due to parallel operation, 7
Since the abnormality detection signal from the output terminal B of the 0-trace control device 2 is no longer generated, the timer T is reset and the relay X is reset.
従って制御信号の発生が無くなると、２台のポンプの運
転が停止し、再び制御信号が発生すると、第１のポンプ
が運転され、以後交互運転が為される。Therefore, when the control signal is no longer generated, the operation of the two pumps is stopped, and when the control signal is generated again, the first pump is operated, and thereafter, alternate operation is performed.
ところで並列運依が行なわれても液位が異常検出電極Ｅ
０より低（ならず、７０−トレス制御装ｆｉ２からの第
２図（ｅ）に示すように異常検出信号がタイマＴの限時
時間以上継続すると、タイマＴのタイマ接点ｔがタイム
アツプ時にオンして異常表示ランプＬ１及びブザーＢｚ
に通電し、第２図（ｇ）に示すように警報報知が為され
る。By the way, even if the parallel operation is carried out, the liquid level will not reach the abnormality detection electrode E.
If the abnormality detection signal from the 70-trace control device fi2 continues for longer than the time limit of the timer T, the timer contact t of the timer T turns on at the time of time-up. Abnormality indicator lamp L1 and buzzer Bz
is energized, and an alarm is issued as shown in FIG. 2(g).
このように本実施例では並列運転が一定時間以上継続し
ても液位が異常液位以下とならない場合に初めて警報が
発せられるものであるから、本当の異字が分かるのであ
る。In this way, in this embodiment, an alarm is issued only when the liquid level does not fall below the abnormal liquid level even if the parallel operation continues for a certain period of time, so that the actual abnormality can be detected.
笈１乱り
本実施例は第３図に示すように７０−トレス制御装置２
に異常液位検出時の異常検出信号を発生する端子が出力
ｉＢ以外の出力ｉＤにも発生させることができるものを
用いた場合で、この場合出力ｉＤ側にタイマＴと、異常
表示ランプＬ１及びブザーＢｚの回路を接続し、リレー
Ｘ２を出力ｉＢに接続しである。このリレーＸ２は出力
ｇ＠Ｂからの異常検出信号により動作して、出力端Ａよ
り出力する制御信号をリレー接点ｘ２ｂを介して励磁コ
イルに通電させ自己保持を行うもので、実施例１におけ
るリレーＸ、を無くした点に特徴がある。In this embodiment, as shown in FIG.
In this case, a terminal that generates an abnormality detection signal when detecting an abnormal liquid level is used that can also generate an abnormality detection signal at output iD other than output iB. In this case, a timer T, an abnormality display lamp L1 and Connect the buzzer Bz circuit and connect the relay X2 to the output iB. This relay X2 is operated by the abnormality detection signal from the output g@B, and performs self-holding by energizing the excitation coil with the control signal output from the output terminal A via the relay contact x2b. It is distinctive in that it eliminates the X.
［５ｉ！明の効果］
本発明は制御電極間の液位で制御出力を発生し異常液位
に対応して設けた異常液位検出電極が液位を検出すると
異常検出信号を出力する液位検出手段と、液位検出手段
の制御信号で少なくとも２台のポンプを交互に駆動する
とともに異常検出信号で少なくとも２台のポンプを同時
に運転させる交互運転手段と、液位検出手段の異常検出
信号の出力に応動し、タイムアツプ前に異常検出信号の
出力が停止すればリセットされるタイマと、該タイマの
タイムアツプ時に報知を行う報知手段とを備えであるの
で、並列運転が為されてもただちに警報が発せられるこ
とが無く、本当の異常が発生したとき時のみ警報が発せ
られるので、Ｉｒ！埋がやり易くなるという効果を奏す
る。[5i! Bright Effect] The present invention includes a liquid level detection means that generates a control output depending on the liquid level between the control electrodes, and outputs an abnormality detection signal when an abnormal liquid level detection electrode provided in response to an abnormal liquid level detects the liquid level. , an alternating operation means for driving at least two pumps alternately in response to a control signal from the liquid level detection means and simultaneously operating at least two pumps in response to an abnormality detection signal; However, since it is equipped with a timer that is reset if the output of the abnormality detection signal stops before the time-up and a notification means that notifies when the timer times up, an alarm can be issued immediately even if parallel operation is performed. Since there is no warning and an alarm is issued only when a real abnormality occurs, This has the effect of making burial easier.
第１図は本発明の実施例１の回路図、第２図は同上の説
明用のタイムチャート、Ｐｔ５３図は本発明の実施例２
の回路図、第４図乃至第６図の従来例の回路図である。
Ｅ、・・・異常液位検出電極、Ｅ １９Ｅ２・・・制御
電極、２・・・フロートレス制御装置、３・・・自動交
互リレー装置、Ｌ、・・・異常表示ランプ、Ｂｚ・・・
ブザー、Ｔ・・・タイマである。Fig. 1 is a circuit diagram of Embodiment 1 of the present invention, Fig. 2 is a time chart for explaining the same as above, and Pt53 is a circuit diagram of Embodiment 2 of the present invention.
FIG. 6 is a circuit diagram of the conventional example shown in FIGS. 4 to 6. E,... Abnormal liquid level detection electrode, E 19E2... Control electrode, 2... Floatless control device, 3... Automatic alternating relay device, L,... Abnormality display lamp, Bz...
Buzzer, T...timer.
Claims (1)
対応して設けた異常液位検出電極が液位を検出すると異
常検出信号を出力する液位検出手段と、液位検出手段の
制御信号で少なくとも２台のポンプを交互に駆動すると
ともに異常検出信号で少なくとも２台のポンプを同時に
運転させる交互運転手段と、液位検出手段の異常検出信
号の出力に応動し、タイムアップ前に異常検出信号の出
力が停止すればリセットされるタイマと、該タイマのタ
イムアップ時に報知を行う報知手段とを備えたことを特
徴とするポンプの並列運転処理装置。(1) Liquid level detection means that generates a control output depending on the liquid level between the control electrodes and outputs an abnormality detection signal when an abnormal liquid level detection electrode provided in response to an abnormal liquid level detects the liquid level; Alternating operation means for driving at least two pumps alternately using a control signal of the means and simultaneously operating at least two pumps using an abnormality detection signal; 1. A parallel operation processing device for pumps, comprising: a timer that is reset if the output of an abnormality detection signal has previously stopped; and a notification means that provides notification when the timer times out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20064386A JPS6355382A (en) | 1986-08-26 | 1986-08-26 | Device for processing operation in parallel of pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20064386A JPS6355382A (en) | 1986-08-26 | 1986-08-26 | Device for processing operation in parallel of pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6355382A true JPS6355382A (en) | 1988-03-09 |
Family
ID=16427803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20064386A Pending JPS6355382A (en) | 1986-08-26 | 1986-08-26 | Device for processing operation in parallel of pumps |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6355382A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200448958Y1 (en) | 2008-09-26 | 2010-06-09 | 한국전력공사 | Drainage device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6019790B2 (en) * | 1977-11-18 | 1985-05-17 | 株式会社日立製作所 | Photocurable adhesive composition and method for bonding adherends using it |
-
1986
- 1986-08-26 JP JP20064386A patent/JPS6355382A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6019790B2 (en) * | 1977-11-18 | 1985-05-17 | 株式会社日立製作所 | Photocurable adhesive composition and method for bonding adherends using it |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200448958Y1 (en) | 2008-09-26 | 2010-06-09 | 한국전력공사 | Drainage device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2039713A1 (en) | Processor controlled circuit breaker trip system having reliable status display | |
| US4705456A (en) | Control panel structure for a liquid pumping station | |
| US2709250A (en) | Alarm and annunciator system | |
| JPS6355382A (en) | Device for processing operation in parallel of pumps | |
| JP3578754B2 (en) | Water supply equipment and its operation control device | |
| JPH1082820A (en) | Monitoring device for coil disconnection of wire in circuit breaker | |
| US3384886A (en) | Alarm for emergency lighting system | |
| JP2002359055A (en) | Heater and driving circuit abnormality detecting method | |
| US3246310A (en) | Control and annunciator system | |
| JPS6116734Y2 (en) | ||
| JPH09133567A (en) | Multi-select water level detector | |
| JPS6330239Y2 (en) | ||
| KR100267673B1 (en) | Apparatus for operating electromagnetic retader when the air pressure is lower than default value | |
| JPS58219612A (en) | Confirming device of operation for control equipment | |
| JPH04114735U (en) | Protector operation detector | |
| JP2667459B2 (en) | Pump control device | |
| JP2000284804A (en) | Electric appliance of bathroom arranging type | |
| SU716055A1 (en) | Device for automatic control of smoke exhaust system | |
| JPS59229626A (en) | Floatless liquid level relay | |
| KR890003534B1 (en) | Motor controller | |
| SU1076998A2 (en) | Device for checking serviceability of discrete-type automatic equipment | |
| JPS61286901A (en) | Protecting device for electrical equipment | |
| JPS5815439A (en) | Incoincidence detector | |
| JPH0130844Y2 (en) | ||
| JPS5942706Y2 (en) | Circuit element failure detection device |