Auto Relays
Auto off relay control higher voltages or currents by using lower voltages or currents. When a certain voltage or current is applied to both ends of the electromagnetic relay coil, the magnetic flux generated by the coil passes through the magnetic circuit composed of the iron core, the yoke, the armature and the working air gap of the magnetic circuit. Under the action of the magnetic field, the armature is attracted to the pole face of the iron core. Therefore, the normally closed contact of the contact is pushed to be disconnected, and the normally open contact is closed. When the voltage or current at both ends of the coil is less than a certain value, and the mechanical reaction force is greater than the electromagnetic attraction force, the armature will return to the initial state, the normally open contact is disconnected and normally closed contact is on.
Key Features of Auto Relays
With charatstic of high switching load power, high shock and vibration resistance.
Power 12V.
Power consumption 1.6～2W.
Ambient temperature -40℃～125℃.
How To Test Auto Relays?
(1) A simple method for judging the working performance of the auto relays.
Turn on the ignition auto relay switch, and then use your ear or stethoscope to listen to the sound of the control relay, or feel the vibration of the relay with your hand. If there is vibration, then the auto relays is working well, the electrical appliance does not work due to other reasons. Otherwise, the relay is not working properly.
You can also unplug the auto recloser relayfor testing, for example, if the air conditioner compressor does not work, you can start the engine, turn on the blower switch and the air conditioner switch. Then unplug the connector of the air conditioner compressor relay to judge. If the sound of the relay action can be heard, the engine speed drops significantly when the relay is unplugged, and the engine speed rises when the auto relays is inserted, it means that the air conditioner compressor relay and its control circuit are normal.
(2) Common failures of relays.
Common failure phenomena of relays include coil burnout, inter-turn short circuit or insulation aging, contact ablation, thermal decay, and inability to adjust the initial operating current.
①The relay coil is burnt out. In order to prevent this from happening, if the temperature may exceed 80°C during repair, maintenance and electric welding, the temperature-sensitive relays and electronic control units should be removed.
② Contact ablation. For example, vehicle with 491Q-ME engine, the relay of the air conditioner condenser fan is just below the glass cleaning spray pipe. If the spray pipe is broken, the cleaning fluid will leak to the relay, making the relay normally open contact is corroded and cannot be disconnected, which will lead to the failure of the air conditioner condenser fan to keep running. Therefore, water should be strictly prevented from entering the relay.
(3) Try to reduce the contact resistance of the relay contact.
The contact resistance existing between the contacts of the automotive relay is mainly composed of shrinkage resistance and surface film resistance. The contact resistance of the contact is related to the contact form, material properties and surface processing of the contact. It can be seen that to reduce the contact resistance of the relay contacts, under the condition of a certain contact pressure, it can be started by improving the contact state and improving the contact material.
(4) Poor grounding of the ECU may affect the normal operation of the relay.
Now the price of auto spares saleis reasonable, if you have needs, please contact us.
Send product request
Other supplier products
 |
Car Air Filter | The car air filter commonly used in passenger fuel vehicle engines mainly have paper air filter and polyurethane air filter. Paper air filters are... |
 |
Windshield Wiper Blades | Because of legal requirements, almost everywhere cars must be equipped with windshield wiper cutters. The windshield wiper cutter also has the char... |
 |
Auto Car Thermal Expansion Valves | The auto ac expansion valve of the automotive air conditioner is installed at the entrance of the evaporator, and has two main functions. Throttle... |
 |
Ignition Coils | Introduction of car ignition coil Winding and potting are the key processes in the production of ignition coils. MAPMS has multiple automatic wi... |
 |
Neutral Safety Switches | The neutral safety switch relay is one of the vehicle safety switches to prevent accidents, which plays a role in safety protection. When the vehic... |
Same products
 |
Diesel Fuel Injector Nozzle G4S090 | Seller: Pioneer Diesel Parts | Pioneer Diesel Parts Whats/App: +86 152 6025 8100 Web: pioneerdieselparts.com The Fuel Injecto... |
 |
High Performance Diesel Fuel Perkins Injector 2645A749 Injector 320-0690 for Caterpillar C6.6 Engine | Seller: DIP (DIESEL INJECTION PARTS) PLANTS | |
 |
High Performance Diesel Fuel Perkins Injector 2645A746 Injector 320-0677 for Caterpillar C6.6 Engine | Seller: DIP (DIESEL INJECTION PARTS) PLANTS | |
 |
Hot Selling 7W7026 Diesel Fuel Injector 7W-7026 Pencil Nozzle For Caterpillar 3406 Engine | Seller: DIP (DIESEL INJECTION PARTS) PLANTS | Hot Selling 7W7031 Diesel Fuel Injector 7W-7031 Pencil Nozzle For Caterpillar 3406 Engine Whatsa... |
 |
Hot Selling 7W7031 Diesel Fuel Injector 7W-7031 Pencil Nozzle For Caterpillar 3406 Engine | Seller: DIP (DIESEL INJECTION PARTS) PLANTS | Hot Selling 7W7031 Diesel Fuel Injector 7W-7031 Pencil Nozzle For Caterpillar 3406 Engine Whatsa... |
