Megger NIM1000-Impedance Meter

The Megger NIM1000 Impedance Meter is an essential tool for testing and analyzing low voltage networks, designed to meet the rigorous standards of DIN EN 61557-3 and VDE 0413-3. This advanced device offers a high test current capability of up to 1000 A, making it adept at performing thorough and reliable impedance measurements on phase and neutral conductors up to the 10th harmonic.

The NIM1000 excels in detecting various faults within electrical grids, including load-sensitive and neutral faults. Its capability to measure grid impedance across multiple phases, and to automatically switch between test points, allows for comprehensive coverage and detailed analysis of the network’s performance under different conditions. This feature is particularly valuable for identifying weak points and potential hazards that could lead to serious safety issues.

Engineered for precision, the Megger NIM1000 provides highly accurate readings and displays all measured parameters on a clear, bright color display, enhancing the usability and readability of the data. It supports multi-phase measurements, which are crucial for assessing the overall health and functionality of the electrical grid. By calculating the impedance of the neutral conductor, the NIM1000 can expose defects that may not be visible through other means, thus preventing downtime and ensuring operational safety.

Furthermore, the NIM1000 is designed to trigger and identify faults that are sensitive to load changes, a critical feature for maintaining stable and reliable power delivery. It can also evaluate the current capacity of the network under actual load conditions, determine voltage dips caused by specific loads, and conduct effective tests on cables, power supply lines, and busbars. These capabilities make it an indispensable tool for ensuring optimal dimensioning of electrical installations and maintaining high power quality.

The tester’s simple operation and portable design make it an ideal choice for utility testing technicians who require a reliable and efficient tool in competitive market conditions. The NIM1000 not only enhances the productivity of testing operations but also contributes significantly to the preventative maintenance strategies of low voltage utilities, aiming to minimize operational risks and improve service reliability.

Megger NIM1000-Impedance Meter specifications:

• Test Current Range:80 to 1000A (adjustable)
• Maximum Current (peak) imax (depends on the grid impedance):≤ 1000 A @ 400 V
  ≤ 600 A @ 230 V
  ≤ 300 A @ 115 V
• Test Parameters: Z = Impedance (value and phase)
  R = Resistance (real part)
  X = Reactance (imaginary part)
  ZPEN = Impedance value PEN (calculated)
  Z, R, X und ZPEN are displayed for the power frequency up to the
  10th harmonic (phase-N, phase-phase)
  Urms = RMS voltage
  Imax = max. test current
  Is = Short circuit current
  Skv = Continuous short circuit power
  f = Net frequency
  VD = Voltage drop at nominal connected power (in %)
  Pmax = max. connected power at nominal voltage drop
• Input Voltage (Serves as Supply Voltage):90 V … 480 V, 50/60 Hz (at test clamps)
  90 V … 230 V, 50/60 Hz (at power outlet)