Leviton Telcom CTC30-57B Split Core Current Transformer

Product Description

The LEVITON TELCOM CTC30-57B is a split core current transformer rated at a 3000:0.1A turns ratio, designed for non-invasive current measurement in electrical monitoring applications. Split core transformers allow installation around an existing conductor without disconnecting the circuit, making them a practical choice for energy monitoring, power metering, and building automation systems. Licensed electricians and energy management technicians install this type of device when retrofitting current sensing into live panels or distribution systems. The 3000:0.1A ratio steps down high primary current to a low-level secondary output suitable for meters, data loggers, and control equipment.

The CTC30-57B is suited for commercial and industrial electrical installations where current monitoring is required on existing conductors. Typical applications include energy sub-metering panels, power quality analyzers, building management systems, and demand monitoring setups. The split core design eliminates the need to break the primary conductor, reducing installation time and minimizing service disruption in active electrical systems.

Key Features

• 3000:0.1A ratio provides a low-level secondary output compatible with standard metering and monitoring equipment
• Split core construction allows clamp-around installation on live conductors without circuit interruption
• Sold individually as a single unit per package
• Suitable for retrofit energy monitoring and sub-metering applications

Compatibility

Designed as an OEM-style replacement and retrofit current transformer for commercial and industrial energy metering, power monitoring, and building automation systems requiring a 3000:0.1A split core sensing device.

Installation Notes

Installation should be performed by a licensed electrician following applicable NEC requirements and local electrical codes. Before installing or repositioning the transformer, de-energize the circuit when possible, or follow arc flash and PPE protocols appropriate for live-panel work. Ensure the split core halves are fully closed and latched around the conductor to maintain accurate measurement and safe operation. Do not exceed the rated primary current of the transformer.