Which Shelly device does this transformer work with?

It is a measuring accessory for the Shelly EM Gen3 energy meter; the connector on the 60 cm lead plugs straight into the EM Gen3 input. It does not work on its own.

What conductor thickness fits in the clamp?

The ferrite core's inner window is 7 mm and the maximum accepted conductor size is 4 mm. Check your cable thickness before ordering.

Does this transformer have Wi-Fi or Bluetooth?

No. The transformer is only a passive current sensor; all connectivity is provided by the Shelly EM Gen3 host device it connects to.

How many transformers do I need for a three-phase installation?

One per phase, so three transformers for three phases. For a single-phase line, one transformer on the live conductor is enough.

Can I mount the transformer outdoors?

No. The protection rating is IP20, so installation is strictly indoors inside a protected electrical panel. Connection must be done by a licensed electrician.

What is the product's accuracy and warranty?

The measurement accuracy is 1%, with a 20 Ω burden resistance and 3000 VAC dielectric strength. CasaSmart provides a 24-month warranty for this accessory in Moldova.

Shelly 80A Current Transformer for EM Gen3

Name: Shelly 80A Current Transformer with Connector for EM Gen3
Brand: Shelly
SKU: SHELLY-CT-80A

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What it is, who it's for, what it does

About this product

The Shelly 80A Current Transformer is a measuring accessory that clamps around a phase conductor and passes the current reading to the Shelly EM Gen3 energy meter. It does not work on its own: it is one component of a consumption-monitoring system and requires the Shelly EM Gen3 host device.<br><br>The ferrite core has a 7 mm inner window and accepts a conductor up to 4 mm, with a measurement accuracy of 1%. The clamp ships with a 60 cm lead fitted with a dedicated connector that plugs straight into the EM Gen3 inputs without screw terminals.<br><br>With a 20 Ω burden resistance, 3000 VAC dielectric strength and IP20 protection for indoor mounting, the transformer is meant for in-panel installation by a licensed electrician. For a single phase, use one transformer on the live conductor.

Delivery
Free from 1500 MDL
Returns
30 days to return
Warranty
24 months

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Where it works

Use cases

A Chisinau apartment owner wants to see the real monthly usage and clamps the 80A CT on the phase in the panel, connected to the EM Gen3.

Measuring the whole-home consumption on the phase conductor of the main feed.

In a house with a heat pump, the electrician fits the transformer on the dedicated circuit to isolate that equipment's consumption.

Tracking a large load such as a heat pump or water heater separately.

A small shop in Balti monitors its energy use to optimise costs, using the EM Gen3 with the 80A clamp.

Metering a shop or office on a moderate-cross-section circuit.

For the installer

Technical specifications

full spec · wiring · datasheet

Power

Rated current: 80 A
Measurement accuracy: 1 %
Burden resistance: 20 Ω
Dielectric strength: 3000 VAC, 1mA, 60s

Physical

Core type: Ferrite
Inner window diameter: 7 mm
Maximum conductor size: 4 mm
Cable length: 60 cm

Connectivity

Connector: Dedicated connector for Shelly EM Gen3
Compatible host: Shelly EM Gen3

Environment

Protection rating: IP20
Placement: Indoor

Other

Country of origin: Bulgaria

Full device datasheet

Support

Frequently asked questions

Which Shelly device does this transformer work with?
It is a measuring accessory for the Shelly EM Gen3 energy meter; the connector on the 60 cm lead plugs straight into the EM Gen3 input. It does not work on its own.
What conductor thickness fits in the clamp?
The ferrite core's inner window is 7 mm and the maximum accepted conductor size is 4 mm. Check your cable thickness before ordering.
Does this transformer have Wi-Fi or Bluetooth?
No. The transformer is only a passive current sensor; all connectivity is provided by the Shelly EM Gen3 host device it connects to.
How many transformers do I need for a three-phase installation?
One per phase, so three transformers for three phases. For a single-phase line, one transformer on the live conductor is enough.
Can I mount the transformer outdoors?
No. The protection rating is IP20, so installation is strictly indoors inside a protected electrical panel. Connection must be done by a licensed electrician.
What is the product's accuracy and warranty?
The measurement accuracy is 1%, with a 20 Ω burden resistance and 3000 VAC dielectric strength. CasaSmart provides a 24-month warranty for this accessory in Moldova.

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Questions about this product?

A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.

+373 60 944 922

Updated: 18 June 2026· reviewed by CasaSmart Expert Team