Low-voltage switchgear is often found on the secondary (low-voltage) side of a power distribution transformer. This transformer and switchgear combination is known as a substation. Typical ANSI/NEMA (American National Standards Institute, National Electrical. LV switchgear, or Low Voltage Switchgear, refers to electrical equipment designed to control, protect, and isolate electrical circuits operating at low voltages — generally defined as ≤1000V AC or ≤1500V DC. LV panels are always connected at the power distribution transformer's secondary (low voltage). Power Distribution Equipment is a term generally used to describe any apparatus used for the generation, transmission, distribution, or control of electrical energy.