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NIM 1000 data sheet - .PDF file.

By using a user-selectable test current from 80A up to 1kA, the Megger NIM 1000 network impedance meter allows users to make accurate loop impedance and fault current measurements on live circuits close to the source of supply, even in large electrical installations such as those found in major hospitals and on big industrial sites.

Depending on the earthing configuration of the network, the instrument also uses multiphase measurements to calculate the impedance of the neutral conductor, enabling it to reveal defects that could have major safety implications.

In addition, the NIM 1000 has a current ramp feature that can be used to trigger load-sensitive and neutral faults, thereby exposing weak points in the supply network. It can also analyse the complex impedance of the network up to the 10th harmonic to determine how it will perform with electronics loads, such as variable-speed drives, which generate high levels of harmonic currents.

It measures the complex loop impedance of the live supply network under real-world conditions, down to 1mΩ resolution. It can resolve absolute loop impedances or break the measurement into the real and imaginary components — for example resistive and reactive.

The NIM1000 network impedance meter is equally suitable for single- and three-phase applications. It can be used to make single measurements, multiple measurements with averaging or automatic long-term measurements.

Click on the link above to download the data sheet.

Key features and benefits

  • The NIM 1000 meter allows users to make accurate loop impedance and fault current measurements on live circuits, close to the source of supply.
  • It uses multiphase measurements to calculate the impedance of the neutral conductor, enabling it to reveal defects that could have major safety implications.
  • Its current ramp feature can be used to trigger load-sensitive and neutral faults, thereby exposing weak points in the supply network. 
  • The device can analyse the complex impedance of the network up to the 10th harmonic to determine how it will perform with electronics loads.
  • It can resolve absolute loop impedances or break the measurement into the real and imaginary components.
  • The meter is suitable for single- and three-phase applications.
  • Users can define their own test sequences, based either on a preset time frame or on a specific number of tests.
  • The NIM 1000 is built into a rugged enclosure with a hinged protective lid and is supplied complete with four Kelvin clamps and 3m test leads.
  • It features a large colour display screen that presents results both graphically and numerically and it has a large internal memory that can store a minimum of 1,000 test records.
  • Stored records can either be recalled to the display or transferred to a PC for further analysis using a standard USB memory stick.

Megger

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

Megger offers equipment for testing breakers, protection relays and CTs, as well as transformers, earthing systems and standby batteries to the electrical generation, transmission and distribution industries. In the LV sector Megger is the market leader for the testing of building wiring to the 17th Edition of the Wiring Regulations and portable appliances.

They have recently acquired a range of water leak detectors

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