Boxes of TDGC2 variacs also called
Model checked*: TDGC2-1KVA – so each box contains a 1KVA unit. The 2KVA box isn’t checked, so those aren’t in this stack TDGC2 is the standard model code for a single-phase, dial-type variac. The dial on top lets you adjust the output voltage manually
They take your mains input voltage, say 220V/230V in Nigeria, and let you dial the output anywhere from 0V up to about 250V. They’re used when you need to control voltage precisely for testing, lab work, or sensitive equipment.
Common uses:
1. *Testing electronics*: Slowly power up devices to check for faults without blowing them.
Motor speed control For small AC motors that don’t have built-in speed control Lighting/dimmer control For stage lighting,