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What is the circuit for float switch connection to a single phase motor?
Wiki User
∙ 8y ago
float switches are not rated for motor currents, therefore you would need a motor starter/contactor to handle to motor current and the float switch would be wired into the coil circuit, i.e., control voltage source.. I'm guessing 120VAC wired through the float switch to the contactor coil and the other side of the coil wired through the overload contacts to neutral (white wire).
Wiki User
∙ 8y ago
Wiki User
∙ 9y agoAnswer for Canada, USA and countries running a 60 Hz supply service.
All pump motors need control to start and stop the pump. Whether it is done from a pressure switch or a float system it doesn't matter they both should control the motor's contactor and not the pump directly. Most small relays do not have the amp capacity in their contacts to handle inductive loads. Using a motor contactor also has the benefit to protect the motor with overload protection. Using the overload contacts in series with the control device allows the pump to go off line should an overload occur.
Take a wire from one of the line terminals L1 to one side of the contactor coil. Take another wire from the second line terminal L2 and put it to one side of a N.C. contact on the overload block. From the other side of the N.C. contact on the O/L block take a wire to the N.C. terminal on the float switch. From the other side of the N.C. contact on the float switch terminal connect the wire to the other side of the coil. This configuration will be using the same coil voltage on the contactor as that of the supply voltage.
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself, on electrical circuits, equipment or appliances always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Wiki User
∙ 8y agoTake a wire from one of the line terminals L1 to one side of the contactor coil. Take another wire from the second line terminal L2 and put it to one side of a N.C. contact on the overload block. From the other side of the N.C. contact on the O/L block take a wire to the N.O. terminal on the float switch. From the other side of the N.O. contact on the float switch terminal connect the wire to the other side of the coil. This configuration will be using the same coil voltage on the contactor as that of the supply voltage. When the liquid level rises the N.O. contact on the float switch will close and draw the contactor in. When the contactor closes the motor will start.
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What is the difference between level switch and float valve?
The operation is similar but what they control are two very different things. A level switch, just like the word switch implies, either completes or breaks an electrical circuit when a certain condition is reached. This is similar to the mercury switch in most thermostats. When the ambient temperature reaches a certain point, the bimetal spring of the switch tilts one way and the mercury contained inside the glass tube moves toward one end or the other completing the appropriate electrical circuit to trigger the HVAC system to activate. When another point is reached, the mercury switch tips the other way and breaks the connection because the mercury is not at the opposite end of that tube.As for a float valve, it functions similarly but rather than making or breaking an electrical connection, it turns on or shuts off a valve that controls the flow of some substance. An example of this is the float valve that controls the filling of the water tank on the back of a toilet. When you hit the switch to flush the toilet, the flapper valve opens and stays open due to the pressure to keep it aloft by the water rushing by it to go out the hole that it usually seals. Once the water has decreased to a certain level at which there is not enough water to keep the flap up, it flops down and seals the breach. At this point, the float inside the tank is at its lowest point, so the water inlet from your plumbing is allowing the water to flow at its maximum rate. As the water level in the take rises, the float also rises which slowly closes the valve until such time the float is at its maximum level and completely shuts off the flow of water.I hope this helps. If you have any other questions, feel free to drop me a line.
How does a submersible pump work in a water well?
A submersible pump is normally fitted with a float switch. As the water rises, the float switch turns the pump on. When the pump empties the water from the level and the level falls again, the float switch turns the pump off again.
How does a submersible water pump work in a well?
A submersible pump is normally fitted with a float switch. As the water rises, the float switch turns the pump on. When the pump empties the water from the level and the level falls again, the float switch turns the pump off again.
How do you repair a sewage ejector float?
Normally you just replace it as it is not cost effective to replace the switch or float assembly
What is a float switch?
A float switch is a common device that is used as an indicator in pumps or other devices that operates with the use of water. This device detects the current level of water and sends an alarm or acts as a switch for other devices to function.
What are java kaywords?
if ,while,do , int ,float, for,switch,else,
Why is mercury used in float switches?
Because a float switch is used to switch on or on an electrical current. The electricity needs to flow through good conductors like metals, and these metal parts are able to float in the mercury.
How do you connect float switches for a single phase motor through contactor and Over Load Relay?
you would wire a float switch into the control circuit i.e, the contactor coil (which is relatively low current but rated at least for the control voltage,, in most cases 120VAC). also in the same circuit would be the overload contacts. if the overload trips and/or the float switch opens then voltage is removed from the contactor coil
What is the primary use of a float switch?
The primary use of a float switch is used in sump pumps for sewage. They help prevent water damage by measuring how full a sump pump is and when it needs to start pumping.
What is code P0463 on a dodge diesel mean?
Fuel level sensor circuit high. You have an open circuit in the fuel float or in the wiring to the tank.
What is a good sentence uning the word float?
Our class created a float for the homecoming parade.He watched a single feather float through the air.The beach ball will float if you throw it into the pool.Did you order a hot fudge sundae or a root beer float?
What is a buchholz relay?
A Buchholz relay is used to monitor large transformers for oil loss or insulation breakdown, and is located in an inclined pipe between the transformer itself and its oil conservation tank (located above the transformer).It consists of a normally oil-filled chamber containing two floats: an upper float and a lower float. Each float is fitted with a mercury switch, and the lower float is fitted with a deflection baffle.If the oil level should drop, as a result of a leak in the transformer tank, the oil level in the relay will fall, and the upper float will deflect downwards, closing its mercury switch and triggering an alarm in the substation. Should the oil level continue to fall, the lower float will deflect downwards, closing its mercury switch and trigger the transformer's protection circuit -disconnecting the transformer.Minor arcing due to a breakdown in winding insulation will generate gas; this will accumulate in the Buchholz relay, causing the oil level to fall, causing the upper float to deflect and trigger an alarm. A major breakdown in winding insulation will create a pressure wave which will travel through the Buchholz relay, causing the lower float's deflection baffle to deflect that float, activating the protection circuit and disconnect the transformer.A test valve at the top of the Buchholz relay will allow any gas collected within the relay to be tested. The nature of the gas will indicate whether it is due to a breakdown of the oil, or of winding insulation.
