Low Voltage Potential Transformers

A potential transformer (PT), also called a voltage transformer (VT), steps down high voltage to a safe, measurable level (typically 120V) for metering, protection relays, and control equipment. PTs provide electrical isolation between the high-voltage circuit and the measuring instruments.

ANSI Group 1 PTs have lower burden capacity and are typically used for revenue metering where high accuracy at light loads is critical. Group 2 PTs can handle higher burdens and are used for relaying, indication, and general metering. Our models are rated to ANSI C57.13 standards.

The primary voltage should match your system voltage. Common ratios include 120:120V, 240:120V, 480:120V, and 600:120V. The secondary is typically 120V to match standard metering and relay equipment. Contact us for non-standard ratios.

Yes. Our potential transformers are UL Listed and meet ANSI C57.13 standards. They feature thermoplastic cases with resin encapsulation for reliability and are manufactured in our ISO 9001:2015 certified facility in Bartlett, Illinois.