Ring Type Current Transformer 50mm ID – 300/5A, 400/5A | MCE CP74/50

The MCE CP74/50 is a ring type (window) current transformer with a 50mm inner diameter and a 5A secondary output. It steps a measured load current down to 5A for ammeters, kWh meters and monitoring equipment, and suits electricians, panel builders and maintenance teams. It is available in 300/5A and 400/5A ratios.

• Application: Current measurement for ammeters, energy meters and monitoring instruments
• Inner diameter: 50mm window for the primary conductor
• Ratios: 300/5A and 400/5A, 5A secondary
• Accuracy: Class 1.0, 5VA burden

Key Features

• Ring type design: the primary cable or busbar passes through the centre window
• 50mm window suits larger cables and small busbars
• Class 1.0 accuracy for general metering
• 5A secondary suits standard panel ammeters and meters

Typical Applications

• CT-operated ammeters on main distribution boards
• Energy metering on larger feeders
• Load monitoring on motor and plant circuits
• Switchboard and panel building

Technical Specifications

What’s Included

• 1 x MCE CP74/50 ring type current transformer (selected ratio)

Please note: Installation fittings, electrical protection, cables, brackets, meters or accessories are not included unless specifically listed above.

Installation & Compatibility Notes

• Select the ratio based on the maximum load current of the circuit.
• Confirm the primary cable or busbar fits through the 50mm window before ordering.
• Do not leave the secondary open-circuit while the primary is energised.
• Check that the connected meter is rated for a 5A CT secondary and that the burden suits the CT.
• Installation should be carried out by a suitably qualified person.

Warranty & Support

This product is supplied with the applicable manufacturer or supplier warranty, subject to correct installation, correct application, and warranty terms. Zisabo supplies quality plumbing, pump, filtration and electrical products with practical support to help customers choose the correct item for their application.

Need help choosing? If you are unsure whether this product is suitable, contact Zisabo with your cable or busbar size, load current and the meter you intend to connect, and we will assist where possible.