EMU-CT50

What type of component is this?

This is a split-type current transformer/current sensor used for measuring AC current in energy monitoring systems. The EMU-CT50 is designed to clamp around a primary conductor so the connected measuring unit can read current without the main conductor being routed directly through the measuring module.

What is the rated current?

The rated primary current is 50 A AC. The rated secondary output is 16.66 mA, making it suitable for compatible Mitsubishi energy measuring equipment designed for EMU-series current sensors.

What is the benefit of the split-core design?

The split-core construction allows the sensor to be opened and fitted around an existing conductor, which can simplify installation in control panels and energy metering applications where rewiring the primary cable would be impractical.

Which systems can this current sensor be used with?

It is intended for use with compatible Mitsubishi energy measuring modules and energy measuring units, including selected MELSEC-Q, MELSEC iQ-R and EcoMonitor configurations that accept EMU-series split-type current sensors.

What frequency range does it measure?

The current sensor is specified for 45 to 65 Hz operation, covering standard 50 Hz and 60 Hz industrial power systems.

What voltage rating applies to the measuring circuit?

The sensor is specified with a maximum voltage of 266 V to ground and 460 V line voltage, subject to the rating and configuration of the connected measuring unit.

How accurate is the current measurement?

The sensor has a ratio error of ±1% across 5% to 100% of its rated current, with the stated conditions for the connected burden. Overall measurement accuracy also depends on the paired energy measuring unit and installation conditions.

What are the approximate physical dimensions?

The unit measures approximately 39.6 mm wide, 55.2 mm high and 31.5 mm deep, with a weight of around 0.1 kg.

How should the sensor be orientated during installation?

The sensor has polarity/direction markings. The K or LINE side should face the power source side, while the L or LOAD side should face the load side. Correct orientation is important for accurate energy measurement, especially where consumption and regeneration are being monitored.

What operating environment is suitable?

It is intended for installation inside a control panel, with an operating temperature range of -5°C to +55°C and humidity from 5% to 95% RH with no condensation. It should be kept away from excessive vibration, corrosive gas, dust, water droplets and strong electromagnetic noise.

What conductor sizes can typically pass through it?

As a guide, the EMU-CT50 can be used with IV wire up to 60 mm² or CV wire up to 38 mm². Actual fit should be checked against the finished outer diameter and bend condition of the cable.

Which compliance marks are associated with this sensor?

The part is listed as CE compliant, UL/cUL compliant and RoHS compliant in the available product data. It is also marked for WEEE B2B handling in relevant markets.