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MI 3252 MicroOhm 100A EN

MI 3252 MicroOhm 100A EN

Product catalog summary

Application: The document outlines the use of the MI 3252 MicroOhm 100A for measuring resistance in high, middle, and low voltage circuit breakers, disconnecting switches, high current bus bar joints, cable splices, and welding joints.

Standards: The device complies with several standards including IEC 62271-100, IEC 62271-1, ANSI C37.09, ASTM B 539, and Spain's El Real Decreto 223/2008 for functionality, IEC 61326-1 for electromagnetic compatibility, and EN 61010-1 for safety.

Device Overview: The MI 3252 MicroOhm 100A is a portable low resistance ohmmeter designed for measuring low contact resistances using test currents from 100 mA to 100 A. It features a wide measuring range from 10 µΩ to 20 Ω with high accuracy and resolution.

Key Features: The device is safe with a protection level of CAT IV, 50 V, and can automatically detect continuity in the current circuit. It offers single and continuous measuring modes, is portable with a rugged design, and has a high protection degree of IP 64. It allows for custom limits for PASS/FAIL evaluations, is battery-powered, and can store up to 1000 test results which can be downloaded via RS232 or USB.

Technical Specifications: The device measures resistance with a resolution down to 1 nΩ and accuracy of ±0.25% of reading. It supports various current ranges and has a power supply of 230/115 VAC and a battery of 12 VDC/12 Ah. The device is equipped with a 320 x 240 LCD display and has dimensions of 410 x 175 x 370 mm, weighing 11.8 kg.

Typical Applications: The MI 3252 is used to identify issues related to high contact resistance in circuit breakers, bus bars, weld joints, and ground bonds, which can lead to apparatus failure and damage to nearby components.

Ordering Information: The standard set includes the MI 3252 MicroOhm 100A, various test leads, probes, cables, a bag for accessories, PC software, an instruction manual, and a calibration certificate. Optional accessories are also available.

Examples: Example applications include testing the contact resistance of high voltage circuit breakers with a minimum of 50 A test current as per IEC62271-100, and testing bus bar contact resistance using higher currents for more reliable results.

Catalog excerpts

MI 3252 MicroOhm 100A is a portable low resistance ohmmeter used to measure low contact resistances of breakers and switches, busbars using test current from 100 mA to 100 A. MEASURING FUNCTIONS: • Resistance measurement: wide measuring range (10 µΩ ... 20 Ω) with high accuracy 0.25 % of reading and resolution down to 1 nΩ, adjustable test current (100 mA ... 100 A); • Voltage drop measurement; • Bar graph: on screen resistance bar graph. KEY FEATURES: • Safe: sustain external voltages in case of wrong connection, protection level (CAT IV, 50 V); automatically detects continuity in current circuit. • Single and continuous measuring mode. • Portable: rugged carrying case with a handle and lightweight design enable easy moving the instrument between sites. • High protection degree: IP 64. • Custom limits: the limits can be set for PASS or FAIL evaluation of test result. • Battery powered: the instrument enables measurements with 100 A for up to 10 minutes when powered from internal battery only. • Memory: built-in memory enables storage of up to 1000 test results. • Downloadable: downloads test results via RS232 or USB cable directly to the PC with the help of the software. Accurate low resistances measurement APPLICATION: Measurement of the resistance of: • High, middle and low voltage circuit breakers • High, middle and low voltage disconnecting switches • High current bus bar joints • Cable splices • Welding joints STANDARDS: Functionality: IEC 62271-100; IEC 62271-1; ANSI C37.09; ASTM B 539; Spain: El Real Decreto 223/2008 Electromagnetic compatibility: IEC

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Ordering information: Technical Specification Voltage range • MI 3252 MicroOhm 100A • Current test lead with crocodile clip, 5 m, 25 mm2, 2 pcs • Potential test lead, 5 m, 2 pcs (red, black) • Test probe, 2 pcs (red, black) Power supply Overvoltage category • Instruction manual • Crocodile clip, 2 pcs (red, black) • Mains cable • Calibration certificate Typical applications MI 3252 MicroOhm 100A can help you to find issues typically related with high contact resistance in circuit breakers, bus bars, weld joints, ground bonds. Those issues can lead to apparatus failure and damage of nearby components....

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