Megger S1-568 5 kV Insulation Resistance Tester
- S1-568/2 from the ‘Expert Range‘ with high performance diagnostics
The Megger S1-568 is a 5 kV, Expert range insulation resistance tester built for extreme electrical environments and the highest level of performance and control. It combines all the advanced diagnostic capabilities of the MIT Advanced range with enhanced noise immunity, full remote control capability, adaptive filtering, and the ruggedness to handle EHV environments up to 1000 kV. Designed for power utilities, OEMs, and high-voltage service specialists, the S1-568 provides world-class accuracy, stability, and operator safety in the most demanding field and laboratory conditions.
↑ The enhanced Megger Insulation Testers have arrived – engineered for high-performance diagnostics! Each unit includes a quick-reference guide conveniently built into the lid, providing trained personnel with instant access to essential information while out in the field.
The Expert range combines everything from the Essential and Advanced ranges. If you work in extreme environments, even 765 kV switch yards, want the additional safety and convenience of remote operation via a USB cable, and full control of the output current, this is the choice for you.
Why choose the Megger S1-568?
If your work takes you into heavily noise-contaminated environments such as high-voltage substations, or if you need to automate testing for manufacturing or repair operations, the S1-568 delivers the performance you require. With 8 mA noise immunity, adaptive filtering, remote control via USB, and full control of output current, it offers the ultimate in flexibility and precision for 5 kV testing.
Key features of the Megger S1-568:
- RE>Act mode – improves reliability of results by managing reabsorption current.
- Patented PI predictor (PIp) – speeds up PI testing.
- Measures up to 35 TΩ at 5 kV.
- ±5% accuracy to 1 TΩ at 5000 V.
- Advanced diagnostics: PDC, Ramp, Dielectric Discharge.
- Noise rejection up to 8 mA with adaptive filtering for EHV stability.
- Selectable test currents: 1 mA, 2 mA, 3 mA, 4 mA, 5 mA, 6 mA (6 mA available from battery and mains).
- Onboard memory with time/date stamps and data logging.
- USB and Bluetooth® LE connectivity.
- Remote control via USB cable.
- Safety rated CAT IV 600 V (all terminals) to 3000 m altitude.
- Rugged dual-case construction with large backlit colour display.
Specifications:
| Feature | Details |
| Max Test Voltage | 5 kV |
| Insulation Resistance Range | Up to 35 TΩ |
| Accuracy | ±5% to 1 TΩ at 5000 V |
| Noise Rejection | Up to 8 mA |
| Test Currents | 1–6 mA selectable |
| Safety Rating | CAT IV 600 V, 3000 m altitude |
| Connectivity | USB and Bluetooth® LE |
| Remote Control | USB cable operation |
| Memory | Time/date stamped, onboard data logging |
| Display | Large, backlit colour display |
| Design | Dual case, impact and ingress protection |
Built for your environment
The S1-568 is engineered for the most challenging fieldwork. With adaptive filtering and 8 mA noise rejection, it maintains accuracy even in EHV switchyards and on noisy transmission lines. Its rugged dual-case construction protects it from knocks, dust, and moisture, while the colour display ensures readability in any light.
Applications:
- EHV switchyard insulation testing.
- Manufacturing and OEM testing with remote operation.
- Commissioning and maintenance of transformers, cables, and motors.
- High-voltage service work where extreme noise immunity is critical.
What comes with the Megger S1-568?
- S1-568 insulation resistance tester
- Li-ion rechargeable battery (pre-installed)
- Mains power lead
- Test leads rated for 5 kV
- User guide and quick-start reference
- Carry-all holdall with removable lid pouch
❓ Frequently Asked Questions (FAQ)
Q1: How is the S1-568 different from the MIT525?
A. The S1-568 has greater noise immunity (8 mA vs 6 mA), adaptive filtering, remote control capability, and full selectable current range.
Q2: Can I control the S1-568 remotely?
A. Yes – it supports wired USB remote operation.
Q3: Is it suitable for EHV environments?
A. Yes – it is designed for stable performance in environments up to 1000 kV.
Q4: Does it store and log data?
A. Yes – it has onboard memory with time/date stamping and data logging.
Category Comparison:
The S1-568 is the entry point to the Expert range, offering:
- The same advanced diagnostics as the Advanced range models.
- Higher noise immunity (8 mA vs 6 mA).
- Adaptive filtering for extreme EHV conditions.
- Remote control capability.
- Full test current selection from 1–6 mA from both battery and mains.
Higher Expert models like the S1-1068 and S1-1568 add increased voltage capability (10 kV and 15 kV respectively) for testing larger or higher-rated assets.
Ready for high-performance diagnostics?
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