Testing Electric Motors and Generator
The Megger MTR105 is designed for comprehensive testing of electric motors and generators within wind turbines. Insulation resistance diagnostics, Kelvin low-resistance measurement, and motor rotation direction testing help find early faults. This can prevent downtime.
Its IP54 rugged design makes it reliable in tough onshore and offshore environments. This helps maintenance teams keep nacelle machinery running safely and efficiently.
MTR105 Handy Multi-Functional Tester
Application: A wind turbine nacelle contains several rotating electrical machines
Features
- Checks every important parameter of generators and electric motors in the wind energy plant
- Three-phase insulation diagnostics with temperature correction and measurement
- Guard terminal ensures precise measurement results even in contaminated enclosures
- Voltage meter AC, DC, TrueRMS
- Four-wire low-ohm measurement (Kelvin)
- Continuity and diode test
- Motor rotation direction with phase sequence
- Distinguishes between capacitive, inductive and resistive charging states
- Detects live lines and immediately blocks the measurement for safety reasons
- The outer case is almost indestructible and is weatherproof according to IP54, including the battery and fuse compartments
- And more...
Contact Connections Testers
The MOM2 is a lightweight, battery-powered micro-ohmmeter that delivers up to 220 A test current. For wind farms, it ensures low-resistance connections across turbines, from busbar joints to circuit breaker contacts, preventing overheating and fire risks. Its DualGround capability allows safe measurements with both sides grounded, a critical advantage when working at height in nacelles.
MOM2 Handy Micro-Ohmmeter (tests up to 220 A test current)
Ideal for your environment: Weighing in at 1 kg... it's perfect when working at higher altitudes
Features
- All contact connections within the turbine must be low-resistance enough to prevent devastating fires after heat formation
- The 220 A test current means you will learn much more about the fault than with the 100 A required by the standard
- Weighing in at just under 1 kg it's perfect when working at higher altitudes (such as in the nacelle of a turbine), on load isolating switches, on busbars or when working in confined spaces
- Thanks to the battery, you can work for a full day without having to connect to the mains
- The measurement memory collects your results during the day, which you can then evaluate later comfortably and safely with MOM2 Win on a PC
- And more...
Earthing System Testers
The DET24C enables non-intrusive earth resistance testing, making it ideal for validating foundation electrodes and lightning protection systems on wind turbines. With a CAT IV 600 V safety rating and Bluetooth data transfer, it allows operators to confirm grounding integrity without disconnecting the system. Its flat jaw design resists dirt build-up, ensuring reliable results even in coastal or offshore wind farms.
DET24C Handy Earth Clamps
Application: Earth resistance measurement is a fundamental test in every wind turbine
Features
- Earth resistance measurement is the only way to prove the effectiveness of the foundation earth electrode
- Induces a voltage into the loop and measures the current that flows in the earthing system
- The resistance of the earth loop can be determined from this and this allows you to measure the resistance in earthing or lightning protection systems
- The novel, elliptical design of the jaw and the short jaw body allow you to safely cover round or even flat earth connections
- The use of flat jaws prevents dirt buildup on the clamp and ensures measurement accuracy and reliability in practice
- CAT IV 600 V measurement category
- And more...
Lightning Protection Systems
The DLRO10HD and DLRO10HDX provide accurate low-resistance measurements up to 10 A, essential for verifying lightning protection paths, welded connections, and turbine bonding. Their rugged IP65-rated enclosures withstand challenging environments, while the HDX model adds onboard memory and PowerDB compatibility for streamlined reporting. These instruments help ensure wind turbines remain protected against destructive lightning strikes.
DLRO10HD / DLRO10HDX Micro-Ohmmeters
Application: Lightning strikes can completely destroy a wind turbine
Features
- Wind turbines stand high up on hills or in open spaces and this means lightning strikes are a concern!
- Lightning strikes are not a problem if the resistance of the lightning protection system is low enough. DLRO10HD is specifically designed for this important test
- With a 10 A test current (and up to 100 m test lead for long blades) it's perfect for low-resistance testing on the lightning conductors
- Suited to many other applications too (testing welding connections or the winding resistance of large motors and transformers)
- And more...
DC Insulation Resistance Analysis
The Megger S1-568 delivers up to 5 kV insulation testing with exceptional noise rejection, making it ideal for diagnosing generators, transformers, and long cable runs in wind farms. Its patented RE>Act mode improves measurement reliability by detecting re-absorption currents, while the Polarisation Index predictor (PIp) saves testing time. Built for high-voltage substations and exposed environments, it ensures long-term insulation integrity of critical assets.
S1 Series High-end Insulation Resistance Tester
Which sector? This tester is ideal for energy suppliers
Features
- The insulation on each electrical conductor begins to age immediately after the system is installed (heat, frost, saltwater or pests accelerate this process)
- The systematic testing and diagnosis of the insulation with direct current in the generator, in the transformer and, of course, in all electrical LV lines is therefore the most important test for every electrical component of a turbine!
- This class of devices offers you special properties that perform particularly well in environments with very high interference, such as substations and switchgears (anywhere where transformers are located).
- And more...
For Legal Certainty In Wind Energy
The SVERKER 900 is a versatile relay and substation test system, providing three-phase current and four-phase voltage outputs for protection relay verification in wind farms. It supports both secondary and primary injection testing, helping engineers validate CTs, relays, and switchgear that safeguard turbine operation. Rugged and field-ready, it gives operators confidence in grid compliance and system protection.
Sverker 900 Relay Substation Test System
Why do I need a Sverker? Sverker 900 is a successful protection testing system which is used world-wide!
Features
- Efficiently test the current transformer's functional unit, protective relay and power switch pertaining to switchgear within wind turbines and substations
- The repeat tests carried out on digital protection devices discover faults which cannot be determined via the self-regulation process
- Simulates secondary variables, designed to test all protective functions within protective relay systems
- Can simulate a frequency change in the network
- Standalone functionality
- 3 currents and 4 voltages
- Generation of 900 V and 105 A in single phase mode
- Secondary and primary testing
- And more...
Circuit Breakers
The EGIL200 is a mid-range circuit breaker analyser that simplifies testing while maintaining high accuracy. For wind turbines, it streamlines breaker assessments by combining timing, motion, coil current, and voltage measurements in one setup. With patented DualGround technology, operators can safely test with both sides grounded, reducing risk and setup time. Its intuitive interface and IP67-rated case make it a robust choice for demanding wind farm environments.
EGIL 200 Circuit Breaker Analyser
Application: Measure circuit breakers in wind turbines
Features
- Measure circuit breakers in wind turbines in a more compact, simple and versatile way, plus the price point makes it attractive for small energy producers! (In addition, it’s the ideal tool for operation departments at large energy suppliers)
- Easy-to-use and intuitive operation offers final measurement results with a minimal user interaction
- Instrument and accessories designed for the most demanding field conditions
- And more...
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