Indicator light refers to a light device installed on electrical or mechanical equipment to indicate the operating state or fault state, usually using different colors of light to indicate different states. For example, a green indicator indicates that the device is running properly, a red indicator indicates that the device is faulty or stopped working, and a yellow indicator indicates that the device is in operation or standby state. Indicators provide tips and guidance for users to operate and maintain the device.
The use of incandescent lamp as the light source indicator is composed of lamp holder, lamp bulb, lamp shade and connecting wire, etc., and the use of light-emitting diode as the indicator light, generally installed in the high and low voltage distribution device screen, panel, table, cabinet panel, some low-voltage electrical equipment, instruments on the disk or other more eye-catching position. The indicator light reflecting the working state of the equipment, usually with a red light indicating that it is in the shutdown state, the green light indicating that it is in the normal working state, the milky white light indicating that it is in the trial state, the indicator light reflecting the position state of the equipment, usually with a light indicating that the equipment is charged, the light off indicating that the equipment is out of power, the indicator light reflecting the working state of the circuit, usually the red light indicates that there is no power, the green light indicates that there is power, and the indicator light indicating that there is power. In order to avoid misjudgment, the integrity of the bulb or LED should be checked regularly or regularly during operation.
Operating voltage
The rated operating voltage of the indicator is 220,110,48,36,24,12,6,3 V, etc. Limited by the size of the control circuit through the current, but also in order to extend the service life of the bulb, it is often taken to add a current limiting resistor in front of the bulb or use two bulbs in series to reduce the working voltage.
