The Circutor EC72 F III+N 300V (code M10726) is a panel-mounted AC voltmeter with a built-in phase selector switch, designed for voltage measurement in three-phase 4-wire systems. It covers a measurement range of 300 V with Class 1.5 accuracy and mounts in a standard 72 72 mm panel cutout.

Technical specifications:

• Model: EC72 F III+N 300V
• Circutor code: M10726
• EAN: 8433059005221
• System: Three-phase 4-wire
• Measurement range: 300 V
• Accuracy: Class 1.5 (1.5% FE)
• Scale: 90, P1
• Panel format: 72 72 mm
• Overall dimensions: 72 72 49.2 mm
• Weight: 0.18 kg
• Front protection: IP 52
• Terminal protection: IP 00
• Working temperature: +10 to +30 C
• Storage temperature: -25 to +40 C
• Measurement circuit consumption: 1 to 4 VA
• Operating frequency range: 20 to 100 Hz
• Maximum continuous voltage: 1.5 Vn (2 Vn for 5 s)
• Insulation voltage: 2 kV at 50 Hz for 1 min
• Standards: BS 89, UNE-EN 60051, IEC 144, DIN 43780, IEC 51, UNE 21318
• Certification: CE

Features and benefits:

• Phase selector switch lets each phase-to-neutral voltage be read individually from a single instrument, covering all three phases of a 4-wire supply without additional meters.
• IP 52-rated front face provides dust and splash resistance for typical industrial panel and switchboard environments.
• Class 1.5 accuracy conforms to BS 89, IEC 51, UNE-EN 60051, and DIN 43780, giving traceable voltage indication for panel installations.
• Compact 72 72 mm footprint fits standard panel cutouts widely used in industrial control cabinets and distribution boards.
• Operating frequency range of 20 to 100 Hz accommodates AC supplies beyond the standard 50 Hz grid frequency.

Applications:

• Industrial switchboards and distribution panels monitoring three-phase 4-wire supply networks.
• Motor control centers requiring per-phase voltage indication via a selector switch.
• Building and facility management panels with three-phase 4-wire electrical installations.
• Control cabinets where a single compact meter must display multiple phase voltages.

Also known as: Circutor EC72 F III+N 300V, EC72 F III+N 300V M10726, Circutor M10726, three-phase panel voltmeter, AC voltmeter with phase selector.