Megger NIM1000 Impedance Meter

Megger NIM1000 Impedance Meter

The Megger NIM1000 Impedance Meter delivers up to 1 kA of test current to measure loop impedance and identify faults or weaknesses in low-voltage (LV) electrical networks at an early stage. It reliably detects load-dependent and neutral faults, uncovers weak contacts, and reveals hidden defects that may compromise installation safety. Depending on the network’s earthing system, the NIM 1000 can also perform multi-phase measurements, including the determination of neutral conductor impedance, to expose issues that pose significant operational and safety risks.

The NIM 1000 is a highly versatile diagnostic tool capable of assessing the real current-carrying capacity of a network, calculating the voltage drop for a specified load, and testing cables, supply lines, and bus-bars. These capabilities help ensure electrical installations are correctly dimensioned, support stable power quality, and reduce the likelihood of system failures.

By gathering detailed information on load capacity and voltage behaviour, the NIM 1000 provides a clear evaluation of grid performance under actual operating conditions. Its ability to measure complex impedance up to the 10th harmonic makes it particularly effective for modern networks with electronic loads and converters, where harmonic currents introduce additional stress.

Designed for practical field use, the NIM 1000 features a bright, easy-to-read display, intuitive controls, and a compact, robust form factor, which is ideal for technicians and LV utility personnel working in demanding environments.

Key Features

• Up to 1 kA test current for effective loop impedance measurement and fault detection in LV electrical networks
• Detection of load-sensitive faults, neutral faults, weak contacts and hidden defects in wiring ot network infrastructure
• Capability to perform multi-phase and neutral-conductor impedance measurements (depending on earthing arrangement)
• Ability to assess actual current-carrying capacity, determine voltage drop under load, and test cables, supply lines, and bus-bars for compliance and reliability
• Supports measurement of complex impedance up to the 10th harmonic, making it suitable for modern networks with electronic and converter-driven loads
• Compact, field-friendly design with bright, easy-to-read display and intuitive operation, tailored for technicians and LV utility operators in practical use environments
• Enables evaluation of network performance under real operating conditions, helping ensure installations are correctly dimensioned and stable under load