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A contactor is an electrically controlled switch (relay) used for switching a power circuit. an electro pneumatic contactor is similar to the above except it uses a pneumatic signal to initiate the switching of the electric power circuit. an electro magnetic contactor is a contactor driven by an electric control signal. It us usually just called a contactor.
Wiki User
∙ 16y ago
Wiki User
∙ 6y agoAn electrical contactor works like a remote switch, usually to switch higher voltage/current circuits. A contactor has a set of normally open and/or normally closed contacts. When you energize the coil(s) within the contactor (with a control voltage/signal) the contacts are pulled in magnetically and either complete or open the circuit they are switching. Ex: You would probably need several circuits to cover all the lighting needed in a large parking lot. You could use a lighting contactor with several sets of normally open contacts, (1) for each circuit. Then you could use a pushbutton to supply a control voltage to the contactor. When you push the button the coil(s) are energized, the contacts are pulled in and all the lighting circuits will turn on at the same time; instead of using many switches.
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What is the Difference between auxiliary contactor and power contactors?
Power contactors are used primarily for more sophisticated equipment that need several different points of contact. Auxiliary contactors are primarily for single connections.
How do you change star to delta?
In motor starters, this is usually done using contactors. Explanation of this can easily be done using a circuit diagram. There are three contactors, the main, star and delta contactors-all these contactors can be the same type. There are many ways of wiring a star delta but here I will only give a generalized answer. First, the main contactor and star contactors are energised thus the motor runs in star. After about 5 seconds, the timer which gets energized at the same time as the main and star contactors, switches its CONTACTS i.e the normally open closes and the normally close opens. This dienergize the star contactor and energized the delta contactor. Thus, the motor now runs in delta.
How many contactors are used in a star-delta starter?
3 contactors are used: one for the main incoming service lines, one to make the star connection and one for the delta connection. Auxiliary to the contactors, a delay timer, adjustable from 500-1000 seconds, is used to shift from star to delta configuration.
What is the advantage of a sequencer over a contactor?
Using contactors (or relays) to control electric heat means that all of the heat will be started at one time unless separate time delay relays are used. Contactors are magnetic and make noise. They snap in and may hum. Contactors are normally used on commercial systems where they may not be directly attached to the ductwork. This prevents the noise from traveling through the system - Sequencer are cheaper and quiet compared to contactors.
Can alternating current be switched using normally open switch relays?
Yes. In fact, induction motor 'starters' work using normally-open relays, controlled by low-current control circuits -although we call these heavy-duty relays 'contactors'.
What is electro-pneumatic control?
The pneumatic system controlled by electronic systems.
What are the different types of electro pneumatics valve?
Electro pneumatic valves are mechanical valves but operated through pneumatic using suitable solenoid coils.
Are radio waves electromagnet or pneumatic?
They are electromagnetic.
Sources of transient?
Welding Machines, Electro-Magnetic Contactors, Capacitors for Power Factor Improvements or Corrections
How many types of positioners are there?
1.Pneumatic positioners 2.Electro-pneumatic positioners 3.digital positioners
Explain using bullet points and an explanation the procedures used when faultfinding in electro-pneumatic and electro hydraulic systems?
explain the procedures used in task3 when fault finding in electro-pneumatic and electo-hidraulic system
What is the important electro pneumatic for industry?
Quickly. Power. Remote control.
What are the electro pneumatics component?
Some actuator or devices are operated by compressed air. These devices are known as pneumatic components
How pneumatic lift work?
how penumatic lift work
Is there any difference between the switching action of relays and contactors?
No, there is not any difference between the switching action of a relay and a contactor. Both of these devices are operated by an electro magnetic coil.
What is in a pneumatic system?
Electro. Compressor. Air hoses. Cylinder and piston. Wind engines. Spray oil. Types of control valves.
Is 180 psi a good psi for paintball guns?
It depends what marker you have. A low pressure electro-pneumatic gun (electrics like the Ion) may work on that level, but Mechanical blow-backs might not (like Tippmanns)
