Simpson Electric Current Switches

Overview

The SIMPSON ELECTRIC 01299 is a donut-style current transformer designed for panel meter applications in AC electrical systems. It accepts a 200 amp AC input and steps the signal down to a 5 amp AC output, with a 2 VA burden rating. The operating frequency range spans 50 to 400 Hz, making it suitable for standard power and variable-frequency environments. Connections are made via screw terminals. This transformer is installed by licensed electricians and electrical technicians who need accurate current sensing for ammeter instrumentation without breaking the primary conductor. This current transformer is intended for use with AC ammeters in panel meter installations. The donut configuration allows the primary conductor to pass through the center window without any direct electrical connection to the transformer body, simplifying installation in existing panels and switchgear. It is applicable in residential, commercial, and light industrial settings where current monitoring at 200 amps is required across a wide frequency range. Key Features 200 amp AC input with 5 amp AC output for standard ammeter compatibility 2 VA burden rating supports typical panel meter loads Wide frequency range of 50 to 400 Hz suits both utility and variable-frequency applications Donut-style form factor allows primary conductor pass-through without direct termination Screw terminal output for secure, tool-based wiring connections Compatibility Designed for use with AC ammeters as a panel meter…