The Circutor SEC72 400/5 A (code M102YJ) is an exchangeable dial scale for use with the EC72 series moving iron ammeter. It is designed to display primary current up to 400 A when paired with a 400/5 A current transformer, and fits the 72 x 72 mm panel format of the EC72 instrument. The slim scale plate measures 60 x 60 x 1 mm and weighs just 4 g.

Technical specifications:

• Model: SEC72 400/5 A
• Circutor code: M102YJ
• EAN: 8433059002848
• Measurement range: 400/5 A
• Full scale: 400/5 A
• Compatible device: EC72 moving iron ammeter
• Panel format (modules): 72 x 72 mm
• Scale plate dimensions: 60 x 60 x 1 mm
• Weight: 0.004 kg

Features and benefits:

• Exchangeable design allows the scale to be swapped on an EC72 ammeter without replacing the entire instrument, reducing replacement cost and downtime.
• 400/5 A ratio matches standard current transformers used in low-voltage distribution and switchgear panels, enabling direct primary-current readout.
• Compact 60 x 60 x 1 mm plate fits the 72 x 72 mm EC72 panel cutout without modification.
• Very low weight of 4 g means no additional loading on the ammeter movement during installation.
• Part of the broad SEC72 scale range, from 5/5 A up to 5000/5 A, so the same EC72 instrument can be reconfigured for different CT ratios as installation requirements change.

Applications:

• Replacing a worn or damaged dial scale on an existing EC72 moving iron ammeter in a panel board.
• Reconfiguring an EC72 ammeter for a different CT ratio when electrical distribution circuits are modified.
• New installations requiring a 72 x 72 mm panel ammeter calibrated for a 400/5 A current transformer.
• Switchgear, motor control centres, and industrial distribution boards where primary current up to 400 A must be monitored locally.

Also known as: Circutor SEC72 400/5 A, SEC72 400/5A M102YJ, EC72 replacement ammeter scale, moving iron ammeter dial plate, Circutor M102YJ scale.