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MPI-502F  Multifunction Electrical Installation Meter
About the MPI-502F

The Sonel MPI-502F is a compact yet powerful multifunction meter for electrical installation measurements. Designed with portability and ergonomics in mind, this small device packs impressive capabilities and intuitive operation, making it suitable for both beginner and professional users.

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Its design caters to specialists in the installation and electrical industries, allowing for precise testing of short-circuit loops, RCDs, and protective conductor resistance. The meter’s combination of precision, ease of use, and durability makes it a versatile tool for everyday electrical safety inspections.

Applications:

  • Household and industrial electrical system safety inspections

  • Fast fault loop impedance testing, including in RCD-protected circuits

  • Automated RCD testing with auto mode

  • Socket testing using WS adapter (230 V)

Specifications:

fault loop impedance

  • ZL-PE, ZL-N, ZL-L: 0.13 Ω…1999 Ω (IEC 61557)

  • ZL-PE in RCD mode: 0.5 Ω…1999 Ω (IEC 61557)

  • Resolution: from 0.01 Ω

  • Accuracy: ±(5% m.v. + 3 digits) / RCD mode ±(6% m.v. + 5 digits)

rcd tripping time (tA)

  • General/short-delay RCD: 0…300 ms

  • Selective RCD: 0…500 ms

  • Resolution: 1 ms

  • Accuracy: ±(2% m.v. + 2 digits)

rcd tripping current (IA)

  • AC type: 3.0 mA…500 mA

  • A type (DC bias): 3.5 mA…420 mA

  • Resolution: from 0.1 mA

  • Accuracy: ±5% / ±10% IΔn

resistance of protective conductors and bondings

  • With ±200 mA current: 0.12 Ω…400 Ω (IEC 61557-4)

  • Low current: 0.0 Ω…1999 Ω

  • Resolution: from 0.01 Ω / 0.1 Ω

  • Accuracy: ±(2% m.v. + 3 digits)

Key Features:

  • Measurement of short circuit loop parameters

  • Measurement of loop impedance in networks (220/380 V, 230/400 V, 240/415 V; 45–65 Hz; 180–460 V operating range)

  • Displays resistance (R) and reactance (X) of short circuit loops

  • Low-current loop impedance testing (15 mA) without tripping RCDs

  • High test current capability: 7.6 A (230 V), 13.3 A (400 V)

  • RCD testing for AC and A types

  • Supports prompt, short-delay, and selective RCDs (10, 15, 30, 100, 300, 500 mA)

  • Measures tripping time (tA) and trip current (IA) for 0.5, 1, 2, and 5 × IΔn

  • RE and UB measurements without RCD tripping

  • Extended AUTO RCD test function, including ZL-PE measurement

  • Single tripping measurement of IA and tA

  • Protective conductor continuity testing (±200 mA, EN 61557-4 compliant)

  • Autocalibration for any test leads

  • Audible signal for low-current resistance measurement

  • PE connection verification via contact electrode

  • Voltage measurement (0–500 V) and frequency detection

  • Stores up to 990 results

  • Bluetooth wireless data transfer

  • Backlit keypad and display

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