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Nikhil N
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I have seen some relays mentioned as 110V AC/ 24V DC relay. Is this means, can I use both 24DC and 110V AC to the coil of relay?
Rive said:To switch off DC voltage is the most stressing. I think that 110V AC/ 24V DC will be about this, but without further input I cannot be sure.
Rive said:Could you please give us a link for one such relay?
I have to make chattering relay with above spec. I was using the below circuit for relay chattering. Now with the above relay if I connect 110V AC instead of 12V DC, it will work as same right?Rive said:That's not for a single relay, but for a family. Within the family the contact rating is '10 Amps contact rating at 24V DC or 230V AC', and the coil ratings are 'from 6volts to 110V DC and upto 230V AC with phenolic cover'.
This family consists of 10-20 different relays with various coil ratings, contact arrangement and chasing options.
Ps.: and yes, on the contacts for 10A these relays will bear 24V DC or 230V AC. The limit for DC is far lower than for AC.
Not likely. If that relay coil works at 12V then 110V AC will most likely break/burn it within seconds.Nikhil N said:I have to make chattering relay with above spec. I was using the below circuit for relay chattering. Now with the above relay if I connect 110V AC instead of 12V DC, it will work as same right?
Let me take the first relay spec, they have given the relay work either in 24V DC or 240V AC, so in the above circuit, if I am connecting 240V AC with the first relay, the chattering circuit should work right?Rive said:Not likely. If that relay coil works at 12V then 110V AC will most likely break/burn it within seconds.
The contacts might survive, if that's any help
Just see this product info. It has mentioed the coil DC volage range and AC voltage ranges. For this relay, will it work in both AC and DC volages?Rive said:In a relay you have the coil and you have the contacts. These are different things.
For that relay the rating for the coil is 12V (or something in this caliber, since it works at this voltage).
For the contacts, the rating is 24V DC//240V AC (for 10A at most).
Don't mix the different ratings. If you try to apply 240V AC for the coil, then it'll be far out of it's rating.
Rive said:Regarding the coil, the AC and DC requirements are usually the same. So a relay designed for 24V AC should be OK for 24V DC.
Apply 24 volts DC to a 24 volt AC relay coil and you'll probably let the smoke out of it in just minutes.For the AC type, there is an inrush current during the operation time (for the separated condition of the armature, the impedance is low and a current greater than rated current flows; for the adhered condition of the armature, the impedance is high and the rated value of current flows), and because of this, for the case of several relays being used in parallel connection, it is necessary to give consideration to power consumption.
I have this relay with me. My doubt is whether can I use AC across coil and make a chattering circuit>?jim hardy said:Not so at all.
A DC relay coil has enough resistance to limit the current through it to whatever the designer wanted it to be.
An AC relay coil has far less resistance, instead depends on its inductive reactance to limit coil current.
When first energized it draws several times its rated current and does so until the armature plunger moves into position reducing the air gap which raises inductance, pushing coil current back down to design value. Inrush might be 10X steady state current.
AC relays also have ,magnetic shading on the pole to prevent buzzing when closed , DC poles don't need it because there are no zero crossings.
Panasonic says about relay coils:
https://www3.panasonic.biz/ac/ae/control/relay/cautions_use/
Apply 24 volts DC to a 24 volt AC relay coil and you'll probably let the smoke out of it in just minutes.
Here's a snip from the datasheet of that relay
http://oenindia.com/uploads/products/58_20160601032651.pdf
View attachment 114939
Nikhil N said:My doubt is whether can I use AC across coil and make a chattering circuit>?
Yep. It seems I messed up that part.jim hardy said:Not so at all. .
I won't try it above 24V AC without measuring the actual current through the coil.Nikhil N said:I have this relay with me. My doubt is whether can I use AC across coil and make a chattering circuit>?
Nikhil N said:I have this relay with me. My doubt is whether can I use AC across coil and make a chattering circuit>?
Nikhil N said:By this specification what it means? I have a Eagleman relay, their website showing these details only.
Rive said:That product info sheet is also about a whole family.
The 24V AC version will ~ work as the 12V DC version, but for this family this kind of operation is out of spec. I do not recommend it. Buy the right tool for the job.
"110V AC / 24 DC relay" refers to the electrical voltage and type of current that the relay is designed to work with. The relay is able to switch between 110 volts of alternating current (AC) and 24 volts of direct current (DC) depending on the input signal.
A relay is an electronic switch that is used to control the flow of electricity through a circuit. It works by using an electromagnet to open and close a switch, allowing the current to flow or be interrupted based on the input signal.
The relay is designed to work with both alternating current (AC) and direct current (DC) depending on the needs of the circuit it is being used in. This allows for greater flexibility and compatibility with various electrical systems.
A relay is used to control the flow of electricity in a circuit by acting as a switch. It is often used to isolate and protect sensitive components from high voltage or to control the operation of larger electrical systems.
It is important to check the specifications and compatibility of the relay with the specific circuit you are using it in. While the relay is designed to work with both AC and DC voltage, it may not be suitable for all circuits or applications.