Connect timer and Contactor:
This diagram shows how to make how to connect the timer and contactor. In this circuit, we use a TP MCB ( Tripple Pole Minature Circuit Breaker ), a timer, an SPRT Switch, a magnetic contactor, and an overload. First, we need to connect the TP MCB ( Tripple Pole Miniature Circuit Breaker ), then connect the timer with MCB, then connect the SPRT Switch then connect the contactor, and overload with the timer.
Diagram of Timer wiring:
Components Need for this Project:
You can get the components from any of the sites below:
- TP MCB [See Buy Click Amazon]
- Timer [See Buy Click Amazon]
- SPST Switch [See Buy Click Amazon]
- Contactor [See Buy Click Amazon]
- Overload [See Buy Click Amazon]
Read Also:
Components used to make the Single phase timer wiring:
01. TP MCB
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| Fig 2: TP MCB |
Three wires can be controlled by a triple pole MCB. Triple pole MCB circuit breakers are generally used in three-phase lines. A triple-pole MCB circuit breaker has three wires at its input and three wires at its output. But one can use this circuit breaker in a single-phase line. TP MCB widely used in industries. The reason is that it has three poles. And this TP circuit breaker is used to provide three-phase and three-phase connections. A neutral is not normally used in three-phase lines. But a 4-pole MCB circuit breaker is used if needed.
02. Timer
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| Fig 3: Timer |
Timer is a specialized type of clock used for measuring specific time intervals.An electromechanical cam timer uses a small synchronous AC motor turning a cam against a comb of switch contacts. This type of timer often has a friction clutch between the gear train and the cam, the cam can be turned to reset the time.A simple example of the first type is an hourglass. Working method timers have two main groups: hardware and software timers.Most timers give an indication that the time interval that had been set has expired.
03. SPST SwitchÂ
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| Fig 4: SPST Switch |
A Single-Pole, Single-Throw (SPST) Switch. It's Got one Output and One Input. The Switch will Either be Closed or Completely Disconnected. SPSTs are Perfect for on-off Switching. They're also a Very Common Form of Momentary Switches. SPST Switches are Commonly Used in a Variety of Electrical Circuits and Applications, Such as Turning on And off Lights, Fans, and Other Appliances. They can Also be Used to Control the Flow of Electricity to Different Parts of a Circuit or to Switch Between Different Circuits Altogether.
04. Contactor
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| Fig 5: Contactor |
A magnetic contactor is an electrical device used for load control, automation, and protection. It is much like a magnetic reel. However, relays are generally used for low power and voltage, on the other hand, when we think of high power, these heavy-duty contractors only come to mind. It basically works by switching the load on and off. It has 3 terminals whose inputs are denoted as L1, L2, L3, and outputs as T1, T2, and T3. The circuit of the load is made in automation mode or protection using auxiliary contacts. It has two types of terminals. 1) Normally Open (NO). 2) Normally Closed (NC)
05. Overload
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| Fig 6: Overload |
Overload relays are often used to protect the motor from excessive current flow. Overload relays are used to protect the motor from overheating. Besides some specific faults such as phase to phase, phase to ground, etc. overload relay provides protection to the motor. A thermal overload relay works on the principle of sbimetallic trip electro-thermal characteristics. When the bimetallic heats up, the trip function in the overload relay turns on and disconnects the power supply to the contactor coil, thus tripping the overload relay and breaking the motor current and saving the motor.
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