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In what position are the contacts in when the relay is not operating?
Wiki User
∙ 14y ago
The contacts could be in a normally open or they could be in a normally closed position depending on the type of relay it is. Most relays have their contacts in a C form configuration. This means that there is a common terminal to which the hot wire is connected and two sets of contacts one above and one below the common movable contact. In the de-energized state, between the common movable contact and the contact above will be in a N.C. (normally closed) position. This leaves the contact below and the common movable contact in a N.O. (normally open) position. The contact status is held in this position by a small spring. When the relay coil is energized, the state of these contacts reverse. The relay coils magnetism pulls on the coil armature, to which the common contact is attached, and over comes the pressure of the spring tension. The N.C contact becomes N.O and the N.O. contact becomes N.C. When reading an electrical schematic all relays contacts are drawn in the de-energized position.
Wiki User
∙ 14y ago
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What happens when a relay is operated beyond its rated voltage or current?
Generally speaking, a relay is an electrically operated switch. As such, there are two sets of ratings associated with a relay. The operating voltage will be specified, and the ratings of the contacts are also set down. As regards exceeding the operating voltage, this will cause excessive current to flow in the relay when it is energized. If the voltage is not significantly higher than the rating, and if the relay is not operated often or for long, it will function normally, but probably with a shorter life. At some point, excessive operating voltage will cause the coil in the relay to fail. Operating a relay to energize an electrical circuit with a higher voltage or current than the relay is designed for will shorten the life of the contacts in the relay. Higher voltage and current will quickly burn the contacts and destroy them. This is particularly true if that voltage or current is significantly higher than the ratings set by those who designed and constructed the relay. Things might work for a short time, but not for long.
What is interposing relay?
It is a relay that has two states. in one state a set of contacts will make or break. In the other state the other set of contacts will make or break. One coil operating two sets of common, normally open, normally closed. each set of contacts will change states when the coil is momentarily energized.
What is an explanation of relay 913157 function?
The fuel pump relay, is controlled by the EEC module, which provides power to fuel pump under various operating conditions. When ignition is in "OFF" position, EEC power and fuel pump relay contacts are open. After engine starts, power to fuel pump is supplied through fuel pump relay. EEC module senses engine speed and shuts off fuel pump relay when engine stops.
How does an electric relay work?
Relay contactsThe contacts could be in a normally open or they could be in a normally closed position depending on the type of relay it is. Most relays have their contacts in a C form configuration. This means that there is a common terminal to which the hot wire is connected and two sets of contacts one above and one below the common movable contact. In the de-energized state, between the common movable contact and the contact above will be in a N.C. (normally closed) position. This leaves the contact below and the common movable contact in a N.O. (normally open) position. The contact status is held in this position by a small spring. When the relay coil is energized, the state of these contacts reverse. The relay coils magnetism pulls on the coil armature, to which the common contact is attached, and over comes the pressure of the spring tension. The N.C contact becomes N.O and the N.O. contact becomes N.C. When reading an electrical schematic all relays contacts are drawn in the de-energized position.
How does a normally closed contact work?
De-energize it and note the position of the contacts.
What is the typical rating of a hot wire relay contacts?
The typical rating of a hot wire relay contacts is 35 amp
What is the current rating for a 48 VDC contact relay?
The current ratings of the contacts of a relay are written on the side of the protective envelope that covers the contacts.
What is Safety relay?
Relays with Forcibly Guided Contacts Relays with Forcibly Guided Contacts
Can you directly connect 12 V DC 10 A relay to 230 V AC Supply main line?
Yes you can .connect the 230 volt capacitor series with the relay coil.AnswerIf you are referring to the operating coil, then the answer is of course not, as you will be subjecting the coil to nearly 20 times its rated voltage! If you are referring to the contacts, then you need to check the nameplate data for the relay to find out what voltage the contacts are designed to operate at.
What is the set of contacts actuated by magnetic coil?
Relay
1997 Olsmobile Eighty Eight it will not start I can straight wire the pump and it will start with the key and run all day do you have any suggestuins about what it could be I have checked contacts an?
"fuel pump relay contacts dirty or relay bad" I have checked contacts and I have changed the relay....Do you know of anything else?
If when a relay is energized you measure 0.05 VAC across a set of normally open contacts the?
If, when a relay is energized, you measure 0.05 VAC across a set of normally open contacts, the
