Electromagnetic relay is driving the switch to power small. On radio techniques to switch current loop. On the basis rele kunstruksi in working out can contact directly and indirectly.
Image 1,126 direct and indirect Rele
Direct relay (Figure 1.126a), when the current is supplied to the coil, then on the inside of the coil will terbangkit magnetic field. Contact is coated with an iron will attract each other, resulting in a relationship. Rele indirectly (Figure 1.126b), when the current is supplied to the coil, the armature will be attracted core coil. Armature will move the contact, can connect or disconnect.
Contact type
All electromagnetic relays can be built up so that contacts can be shut down when the coil is energized, which is commonly referred to as normally open (no). Can also when the coil is energized Contact will be open or normally closed (nc). And has a contact that opens and closes when the coil is energized (Figure 1127).
Image 1127 Contact Type
Specifications Contact: switching voltage is the voltage at the contact before the contact is closed and after the open. Contact is a current flow is allowed past the contact when the contact is closed.
- Ferromagnetic material, He is the type of metal that is very easily made into objects of magnets and magnet very easily influenced. Materials of this type, such as iron, steel, and nickel.
- The magnetic material, He is the kind of metal that can not be made into magnetic objects but can still be influenced by magnets. Materials of this type such as platinum and manganese
- Magnetic Materials him, He is the kind of metal that can not be made magnet and also can not be affected by the magnet. Materials of this type such as silicon, copper, zinc, gold