AC relays - Electronic Circuits Projects Diagrams Free

Ravi · 20th November 2003, 02:20 AM

Friends

I have a AC relay (OMRON Model MK3P-I).This is a tripple pole-tripple throw. Contacts are rated at 10Amps.I'm not very familier with AC relays & its operation. I have no problem of identifying the pin connections but have few quetions.

1. When conected to a AC line won't the relay goes no/off,on/off due to the positive and negative half cycles of the AC. Do I have to connect a diode in series with the coil, to cut one half of the AC cycle.

2. What is the normal pull in voltage of a AC relay.

3. Can this be directly connected to a normal AC power line or do I have to drop the voltage.(Coil is rated @ 240VAC)

4. Can anybody suggest a link or site to get more info. on OMRON relays

Have a nice Day :!:

crust · 20th November 2003, 02:32 AM

Quote:

Originally Posted by Ravi

4. Can anybody suggest a link or site to get more info. on OMRON relays

www.omron.com

direct link to the product

Product Link

nettron1000 · 21st November 2003, 01:49 AM

1. No. The relay will work fine with AC. The alternating direction of current flowing in the relay coil doesnt matter, the coil is attracting (magnetically) a piece of steel.

2 Theres no normal pull-in voltage for an AC relay, it depends on the voltage rating of the particular relay you have.

3. If your relay COIL is rated for 230 volts AC, this is the voltage required by this particular relay to operate. Do not confuse this with the CONTACT voltage and current rating of the relay which is a different matter entirely.

Ravi · 21st November 2003, 02:08 AM

Many thanks for your valued information friends.

k7elp60 · 21st November 2003, 02:25 PM

If one is to physically inspect an AC relay, they will see a what looks like a
copper ring on the top of the core. This ring is called a shader ring. What it does is essentially holds a portion of the magnetism in the core as the AC voltage decreases to 0 volts. On 60 Hz this is 120 times a second.

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20th November 2003, 02:20 AM	(permalink)
Ravi	AC relays Friends I have a AC relay (OMRON Model MK3P-I).This is a tripple pole-tripple throw. Contacts are rated at 10Amps.I'm not very familier with AC relays & its operation. I have no problem of identifying the pin connections but have few quetions. 1. When conected to a AC line won't the relay goes no/off,on/off due to the positive and negative half cycles of the AC. Do I have to connect a diode in series with the coil, to cut one half of the AC cycle. 2. What is the normal pull in voltage of a AC relay. 3. Can this be directly connected to a normal AC power line or do I have to drop the voltage.(Coil is rated @ 240VAC) 4. Can anybody suggest a link or site to get more info. on OMRON relays Have a nice Day :!: __________________ \"Waste your money and you\'re only out of money,but waste your time and you\'re lost part of your life\"

21st November 2003, 01:49 AM	(permalink)
nettron1000	1. No. The relay will work fine with AC. The alternating direction of current flowing in the relay coil doesnt matter, the coil is attracting (magnetically) a piece of steel. 2 Theres no normal pull-in voltage for an AC relay, it depends on the voltage rating of the particular relay you have. 3. If your relay COIL is rated for 230 volts AC, this is the voltage required by this particular relay to operate. Do not confuse this with the CONTACT voltage and current rating of the relay which is a different matter entirely. __________________ Two roads diverged into a woods...i took the one less travelled by. R. Frost.

21st November 2003, 02:08 AM	(permalink)
Ravi	Many thanks for your valued information friends. __________________ \"Waste your money and you\'re only out of money,but waste your time and you\'re lost part of your life\"

21st November 2003, 02:25 PM	(permalink)
k7elp60	ac relays If one is to physically inspect an AC relay, they will see a what looks like a copper ring on the top of the core. This ring is called a shader ring. What it does is essentially holds a portion of the magnetism in the core as the AC voltage decreases to 0 volts. On 60 Hz this is 120 times a second. __________________ The great thing about electronics is unlimited ways to do the job. The only limit is one\'s imagination. I generally think my way is best. Show me a different way. I have an open mind.