Loop Impedance Testers

With a test current of up to 1 kA, the NIM1000 impedance meter measures the network impedance of the phase and neutral conductors to the 10th harmonic.

This impedance meter triggers load-sensitive and neutral faults, detects weak contacts, and exposes hidden flaws. Depending on the earthing/grounding conditions of the tested grid, a multi-phase measurement calculates the impedance of the neutral conductor to detect defects that can cause severe safety issues.

The NIM1000 is a versatile device: it measures the current capacity under real-life conditions, determines the voltage dip resulting from a given load, and performs tests on cables, power supply lines, and busbars. Those tests help determine the correct dimensioning of installations, ensure a consistently good power quality, and prevent downtimes. The collected data provides a comprehensive and reliable evaluation of the power grid in terms of current load capacity and voltage fluctuations under load.

With its simple operation, handy size, and bright colour display, NIM1000 is a user-friendly tester, developed specifically for the needs of low voltage utilities and their testing technicians who work in today’s demanding and competitive market conditions.

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Introducing a new loop tester for CAT IV applications, the LT300 offers high current loop testing over a wide range of frequencies and supply voltages with simple, fast, two-wire operation.

Supply frequency is indicated upon connection to the supply. This will automatically set to the measured supply frequency either 16 Hz, 50/60 Hz or 400 Hz. Testing will commence automatically.

Three models are available:

• LT300-EN-00 - with red/green leads
• LT300-EN-BS - with BS1363 mains plug lead
• LT300-EN-FS - with fused red/green leads

The high current loop test provides fast accurate and stable results with a resolution to 0.01 Ω on the 20 Ω range.

All models have a large clear display that aids visibility in poor conditions and are housed in a rubber armoured case with a built-in cover to protect the display when not in use. The IP54 weatherproof rating provides excellent protection in adverse conditions. The instruments are supplied with either a two wire (red/green) lead set, or a mains plug test lead for access to wall sockets, a Certificate of Test, and a hard carry case.

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