The Circutor EC72 …/5A (code M10220) is a panel-mount moving iron ammeter designed to measure alternating current via a 5 A secondary current transformer. It occupies a 72 72 mm panel cutout and presents readings across a 90 arc scale at class 1.5 accuracy, giving operators a fast, clear visual indication of current level without requiring a separate auxiliary power supply.

Technical specifications:

• Model: EC72 …/5A
• Circutor code: M10220
• EAN: 8433059000622
• Type: Moving iron ammeter
• Measurement input: …/5 A (5 A secondary current transformer)
• Scale arc: 90, P2
• Accuracy class: 1.5% FE
• Panel cutout: 72 72 mm
• Overall dimensions (W H D): 72 72 49.2 mm
• Fastening: Panel mount
• Weight: 0.111 kg
• Front protection: IP 52
• Terminal protection: IP 00
• Power consumption: 0.3 – 1.5 VA
• Frequency range: 20 – 100 Hz
• Allowable overload: 1.2 In continuous; 5 In for 30 s; 10 In for 5 s; 40 In for 1 s
• Insulation voltage: 2 kV (50 Hz, less than 1 min)
• Operating temperature: +10 to +30 C
• Storage temperature: -25 to +40 C
• Standards: BS 89, UNE-EN 60051, IEC 144, DIN 43780, IEC 51, UNE 21318
• Certification: CE

Features and benefits:

• No auxiliary power supply required – the meter is powered directly from the measurement circuit, reducing wiring complexity in panel installations.
• True RMS measurement across a 20 – 100 Hz frequency range delivers accurate current indication regardless of waveform shape.
• Exchangeable scales are compatible with EC48, EC72, EC96, EM 45, EC 72 FA, and EC 96 FA series instruments, making it straightforward to change measurement ranges without replacing the entire meter.
• High overload resilience – the instrument tolerates 40 times nominal current for 1 second and 1.2 times nominal current on a continuous basis, protecting against transient fault events.
• IP 52 front panel rating provides protection against dust and light water drip in typical panel-mount environments.

Applications:

• Monitoring AC load current through 5 A secondary current transformers in LV distribution boards and switchgear cubicles.
• Visual current supervision in industrial motor control centres and machine control panels.
• Current indication in building electrical installations, power distribution systems, and sub-metering panels.
• Retrofit or measurement-range-change projects where the exchangeable scale system avoids the cost of full meter replacement.

Also known as: Circutor EC72 …/5A, EC72 …/5A M10220, moving iron panel ammeter 72×72, CT-operated ammeter M10220, Circutor M10220 ammeter.