System for measuring the contact resistance between terminals and electrical cables

System for measuring the contact resistance between terminals and electrical cables

The system for measuri ng the contact resistance between terminals and electrical cables (Cable Wire Terminal Connector Contact Resistance Meter), TermResMeter, is designed for automatic and semi-automatic measurements of contact resistance between different sized and shaped terminals and single core, multi core, tape, bar or any other type of electrical cables. This system enables contact resistance measurements in any point of contact.

The system for fixing and connecting the terminal-cable ensemble is flexible and customizable, which allows the usage of the same equipment for different types and sizes of terminals and various types and sections of electrical cables, with known lengths.

The system provides additional information regarding the contact resistance between terminals and cables, including the change in value over time with regards to the temperature variation, due to its feature for direct measurement of cable temperature. In addition, the system enables generation and printing of test reports and building experimental database.

TermResMeter allows both manual and PC-based semi-automatic operation using the specialized software application LowResConTest. To ensure all the features, the system is composed of:

1. Current source – model Keithley 6220 / 6221, for test currents of maximum 100mA or AMETEK/Sorensen, for test currents larger than 100mA, up to 3000A.
2. Nanovoltmeter – model Keithley 2182A, for measuring voltage drop across the measuring points – channel 1, and for measuring temperature of cables under test – channel 2.
3. System for fixing and connecting the terminal-cable ensemble – model OFRIM Engineering, LowResConBench, customizable according to the shape and size of the terminals and cables.

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