Megger S1-568 Review: 5kV Insulation Resistance Tester for Professional Diagnostics
Table of ContentsMegger S1-568 Insulation Resistance Tester for Utility-Grade Diagnostics
Designed for generation, transmission, and distribution environments, the S1-568 combines high-voltage insulation testing, strong noise rejection, and advanced diagnostic tools in one field-ready instrument.
5 kV Testing
A dedicated model for high-voltage insulation resistance applications.
Up to 35 TΩ
Covers a wide range of insulation conditions and asset types.
Advanced Logging
Records long tests with time/date stamping and recall support.
Why the S1-568 Matters
In insulation testing, the challenge is not only generating the test voltage — it is also maintaining measurement stability when conditions are far from ideal. The Megger S1-568 is built with that reality in mind. It offers five preset voltage ranges plus a user-settable lock voltage range, giving technicians flexibility without sacrificing repeatability.
Core Capabilities
Diagnostic Test Modes
Supports IR, IR(t), DAR, PI, SV, DD, and ramp testing for deeper insulation analysis.
Noise Filtering
Includes 8 mA noise rejection and four software filters for cleaner results.
Long Logging Window
Up to 11 hours of logging at 5-second intervals for trend tracking and report generation.
Technical Specifications
| Category | Specification | Reference |
|---|---|---|
| Product Type | 5 kV insulation resistance tester | Page 1 |
| Resistance Range | Up to 35 TΩ | Page 1 |
| Current Range | 0.01 nA to 6 mA | Page 3 |
| Capacitance Range | 10 nF to 25 μF | Page 3 |
| Voltmeter Range | 30 V to 660 V AC/DC, 45–65 Hz | Page 3 |
| Timer | 15 s to 99 min 59 s | Page 3 |
| Logging Memory | 11 hours at 5-second intervals | Page 3 |
| Safety | IEC 61010-1, CAT IV 600 V to 3000 m | Page 1 / 3 |
| Ingress Protection | IP65 closed, IP40 open | Page 1 |
| Operating Temperature | -20 °C to 50 °C | Page 3 |
| Weight | 4.5 kg | Page 3 |
| Connectivity | USB Type B, Bluetooth Class 2 | Page 1 / 3 |
For Utilities
Ideal for generation, transmission, and distribution maintenance programs.
For Service Companies
Useful where portability, logging, and fast setup are needed in the field.
For Asset Testing
Supports trending, condition assessment, and preventive maintenance workflows.
Final Takeaway
The Megger S1-568 is not just a higher-voltage insulation tester; it is a complete diagnostic tool for professionals who need dependable performance in challenging environments. With advanced test modes, strong filtering, durable construction, and utility-focused design, it stands out as a practical choice for serious insulation testing.
