Product Name: Demonstration Electromagnetic Relay
Size: 155*105*75mm/6.1*4.13*2.95 in
Weight: 200g
Material: plastic base + solenoid coil + iron core armature
Purpose: To understand and study the basic structure and working principle of electromagnetic relays in middle school physics teaching.
Instructions
1. Equipped with 9V DC power supply, and can also be equipped with other controlled instruments (such as indicator lights, demonstration motors, etc.) for demonstration.
2. Close K4, control the current through the electromagnet M to generate magnetism, draw the armature P down, make the controlled circuit contact K3 contact, the normally open circuit is connected, disconnect K4, the current disappears, the electromagnet M loses its magnetism, and the spring B pulls up the armature P, the normally open circuit is disconnected, K2 contacts, and the normally closed circuit is connected.
3. Turn the spring screw on the iron to make the spring expand and contract, so that the normally open and closed contacts are in good contact.