1333 The purpose of a relay is to switch a large main current, using a small control current.
A small switch can handle the control current without burning out. The relay contacts
switch the current to the load and are large enough to handle this.
Om
OFF
20M
22
2M
30
A standard relay has four electrical terminals.
These are: (1) main current input, (2) main current output, (3) control current input,
and (4) control current output.
- 200K
87
20K
For example, relays can be used to switch current to the starter solenoid, horn, and
headlamps.
200
1)
16.COM
VΩ
Measure the control current. This is the current that flows through the coil.
mA