Crouzet 84872120 HUL Voltage Monitoring Relay

LED - Light Emitting Diode - a small light source

DC - Direct Current

AC - Alternating Current

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Voltage - A measurement of volts.

Memory - A way to describe the way in which the brain can remember things.

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