How to connect an electric water tank float

 How to connect an electric water tank float

How to connect an electric water tank float. In this article, we will learn how to connect an electric water tank float, which allows the tank to be filled automatically by operating the water pump. The aim of this topic is to explain how to connect an electric water tank float and understand how each element used in the connection works. .

Electric float switch

Tools used in delivery

• Contactor: Selected with an amperage capacity higher than the pump current.
• Electrical circuit breaker2Pole.
• water pump.
• Watertank.
• Electric float switch.

Tools used in delivery

How to connect an electric water tank float

The function of each element in the circuit

• Electric float switch: Also called an electric float switch, it is a switch that floats on the surface of the water so that it rises or falls vertically with the rise or fall of the water level.

The electric float switch is used to detect the status of the water level inside the tank and accordingly its contact points are changed due to turning on or off the pump. It can also be used as an indicator or warning when the water level rises above a certain limit.

• Contactor: (in English: contactor) Also called an electromagnetic switch, the contactor is used in this circuit to control the connection and disconnection of the electricity source from the water pump according to the position of the electric float switch connected in series with the contactor coil.

• Electrical breaker: It was placed in the circuit with the aim of protecting against any malfunction that may occur in the circuit in terms of short circuit or high pump current.

You can see the article Contac torand the article The working principle of the electric circuit breaker

Electrical float switch terminals

The switch contains three colored terminals (red / blue / black) and each terminal has a name as follows:

• Red or brown tip: It is called the “normally open” point and is symbolized by the symbol (NO) and is not connected in the normal state.
• The blue end: It is called the “normally closed” point and is symbolized by the symbol (NC) and is connected in the normal state.
• The black end: It is called the “Common” and is symbolized by the symbol (C), which is the common point between the open point (NO) and the closed point (NC).

Important Notes:

• The colors of the tips may vary from one year to another, so you should look at the chart provided by the manufacturer to know the names of the tips and distinguish between them.
• You can distinguish between the terminals by using the connection feature on the multimeter device to determine which terminals are connected together when the float is placed down and which terminals are connected when the float is placed up. The one that remains connected in both cases is the joint.

Explanation of the operation of the electric water tank float

• When the amount of water in the tank is consumed, the electric float moves downward, causing a change in its contact points, which leads to giving a command to connect the contactor points to operate the pump.
• When the tank is filled with water, the electric float moves upward due to the rise in the water level inside the tank, causing a change in its contact points, and thus the current is disconnected from the contactor coil, causing the current source to be disconnected from the water pump.

The idea of ​​​​the electric float

 The idea of ​​​​the electric float

The idea of ​​​​the electric float. It is always preferable, before dealing with any electrical control tool, such as the electric float switch, for example, to familiarize yourself with its components and the idea of ​​its work.

We have brought to you useful and practical information that may benefit everyone when purchasing an electric float.

What is an electric floater?

It is an electrical control element built with a specific mechanism to control the connection and disconnection of current from the contactor coil or relay with the aim of turning on and stopping the water pump.

The electric float is considered a dry element, as it does not contain an internal coil or electronic circuit other than a ball that moves according to its position, and with it the points of contact change.

It can be said that it works as a connecting and disconnecting switch, as it contains a common point, an open point, and a closed point.

Electric floater

Electrical float tips

The electric float contains only three terminals, each terminal has a specific color, and the colors may differ from one brand to another, so you should always use a multimeter At the conduction inspection site (buzzer) to distinguish between the three terminals of the float.

In general, there are three parties:

• The first end: It is called the “Normally Open” point, and is symbolized by the letters NO.
• The second party: It is called the “Normally Closed” point, and is symbolized by the letters NC.
• The third party: It is called the common point, and the electrical current is connected to it.

How to connect an electric water tank float

The idea of ​​​​the electric float

When placing floaters inside a water tank, two situations may occur:

• Upright-down position when the tank is empty.
• Horizontal-up position when the tank is full.

When the water inside the tank decreases, it continues to decrease according to the water level to a certain point at which a change occurs in its contact points, such that the open point becomes closed, and the closed point becomes open.

The position of the electric float when the water tank is insufficient

When the tank is filled with water, it floats upward, causing its contact points to return to their normal position.

The position of the electric float when filling the water tank

In reality, the electrical factors are not connected directly to the pump, but rather to an intermediary element that works to connect and disconnect the current from the pump. This intermediary is called a contactor or relay, as it receives connection and disconnection orders from it.

How to connectElectric water tank float

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