Open box Current transformer Shelly 120A, compatible with Shelly PRO 3EM

What does "open box" mean?

Open-box products are returned products with opened or damaged packaging, but fully checked from a technical point of view and completely functional. They come with the same warranty as new products.

The 120A current transformer for the Shelly Pro 3EM is an essential accessory for monitoring energy consumption on high-current circuits, such as the main supply to the home, an industrial three-phase circuit or the power supply of a heat pump. The clamp is fitted on the phase conductor, without having to interrupt the circuit, and converts the actual current into a proportional signal that the Shelly Pro 3EM measures accurately.

As a split-core transformer, installation is quick: the clamp opens, is positioned around the conductor and closes again, with no special tools and without removing the cable from the circuit. The 60 cm cable allows convenient connection to the Shelly Pro 3EM even when the electrical panel is crowded.

This type of clamp is recommended for installations with high-power loads, where measurement accuracy is critical for correct billing, energy monitoring or detecting abnormal consumption.

Practical use cases

• Mounted on the phase conductor of the main supply and connected to the Shelly Pro 3EM, it allows real-time tracking of the total consumption of the home.
• On the supply circuit of a heat pump or another high-power load, it provides separate consumption data for that circuit via the Shelly Pro 3EM.
• In an industrial three-phase circuit, the split-core clamp is fitted on the conductor without interrupting the circuit and without removing the cable from the installation.
• The data measured by Shelly Pro 3EM through this clamp help detect abnormal consumption by equipment.

Technical specifications

A precision accessory for accurate energy measurement on high-load circuits, indispensable for Shelly Pro 3EM installations in homes and commercial spaces.