Irrigation place of work with a submersible pump and when the distance is stolen . This example describes the agricultural submersible pumps, anti-theft alarm, can be stolen in the submersible pump water pump motor circuit failure occurs an alarm signal to alert the user timely manner. Circuit works The agricultural submersible pumps, anti-theft alarm circuit from the relay K, diode VDl, VD2, power transformer T and the bells HA composition , as shown in Figure 4-95 . Knife switch connected to Q, does not start in the submersible pump , the power transformer T power work, and the induced secondary winding current by AC contactor KM ordinary knife contacts, start button, contact S2 of the regular Republican River stator motor M Winding loop formation , then pull power relay K , K of the normally closed contact is open, cut off the alarm bells KM HA coil and the power circuit . When the submersible pump stolen or otherwise disconnected , the relay K cut off the power supply circuit , the normally closed contact connected , HA alarm sound . Submersible pump when starting work , press the start button S2, S2 of the normally open contact connected Ikuha contact is open, cut off the power supply circuit K , K power release , KM power pull , KM 's always open Contact KMl, KM2 are connected , electric submersible pumpsM motive power of work , KM self-locking ; KM of the normally closed contact KM3, KM4 were disconnected , and disconnect the T of the first and second loop . When you press the stop button when Sl , KM power release , the normally open contact KMl, KM2 disconnect , submersible pump motor M to stop working ; while the normally closed contact KM KM3, KM4 reset connected to burglar alarm circuit into People alert. Components Selection VDl and VD2 -type silicon rectifier diodes used lN5402 or 2CP35B ordinary diode -type plot . HA used for the 380V voltage alarm bells . K -type selection gate JQX-4 24V DC relays . KM use CDCl0 type 380V AC contactor . T use 3-5W, the second voltage 25-30V power supply transformer (380V/25-30V). S1 selection being broken button ; S2 selected portfolio type ( moving together , moving down each group of contact ) button . Fuse FUl, knife switch Q and the thermal relay KR M rated power should be selected ; FU2 use 2A fuse .