Shading pole. It helps to stop the relay from chattering.
no volt coils are used to de-energise a contactor should a situation arise in which voltage is zero
You will need an interpose relay. This relay will have a 24 volt coil. The circuit power for the relay will come from a 120VAC to 24VAC volt transformer. The 24 VAC circuit will have the thermostat in series with the coil of the relay. Thermostat calls for heat, the coil energizes and the relay's contacts close. Your circulator pump is controlled by the relay. On selecting the relay make sure that the contact ratings can handle the full load amps of the circulator. A contact rating of 120 volts at 15 amps will do very nicely.
a laminated core and a shading coil
If what you term as a "magnetic switch" is an electrical contactor, then the answer is yes.A couple things to keep in mind. I presume the 125 volts mentioned is the coil voltage of the contactor.The switched voltages and amperage or horsepower allowed by the contactor is on the contactor's nameplate. This is the maximum voltage that can be applied to the contactor which includes 12 volts.The amperage of the 12 volt device is not mentioned and this should not exceed the maximum allowed current of the lowest voltage rating of the contactor. This is especially true if the 12 volts is Direct Current. An example of this could be a starter on a car. When the starter starts to crank it could be in the neighbourhood of 300 amps DC. As you can see this would fry the contacts of a normal AC rated contactor.
Yes, as long as the amperage rating is sufficient. Just don`t wire the second pole until the first pole contacts are spent. Then move the wires over and you effectively get twice the life out of it.
If you want to control induction motor using a control relay give neutral directly to the one point of coil of relay & one point of coil of contactor then give control supply through push button to second point of coil of relay. use one NO point of relay and give supply to coil of contactor. and also use one NO of contactor for holding the contactor & take OFF (NC) in the starting to stop motor after complition of work. It is jut like an Direct On-line starter.
I think that would have to be some relay or contactor coil for a fan, compressor or relay contacts.
That is a linear motor.
The coil in a "Contactor" is essentially an electromagnetic coil that provides the driving force to close the contacts in a Contactor. When the "Coil" is energized by a lower control voltage usually from some type of controller such as a PLC, the Normally-Open contactor will close or in the oposite case, the Normally-Closed contactor will open.
A blowout coil connected in series with contactor's auxiliary contacts that shunt around the main contactor contacts. The coil is out of the circuit when the main contactor contacts are closed and in the circuit when the main contactor contacts are open.
If you are questioning about different relay (contactor) constructions, the terms moving coil and moving iron designate what part of the relay moves and carries the conductor that makes or breaks a circuit.
a contactor is generally looks like a small box connected to an electric circuit. it is what controls electricity flow to a motor. in the middle is normally a way to push in the contactor to manually check to see if either the motor works or if you have electricity.
A contactor, as far as being used to start a motor or the like, is in essence, a relay. A coil is energized and the normally open contacts from the contactor close (normally 3 contacts for an AC motor) and the motor starts. Do I understand your question? Or are you trying to decifer the difference between the coil of a relay and the contacts of a relay?
A contactor is tested by using a device called a Multimeter. By setting the multimeter to ohms and rx1 you can clip both prongs to the coil. If the multinmeter moves the contactor is good. If it doesnt move its bad.
Nine tenths of the voltage would appear across the 200-ohm coil.
A phase sensing relay monitors all three incoming phase legs at once. With the relay the operator has the ability to set the trip points in a percentage of incoming line voltage. If the voltage in any of the monitored legs falls below the operators set point the relay will trip and take the monitored device off line. If it is a motor being protected, the auxiliary contacts on the phase sensing relay will change state and its N.C. contact will open. The motor's contactor coil is in series with this auxiliary contact so with the stoppage of current flow to the magnetic contactor's holding coil, the contactor opens cutting off the supply to the motor.
no