Megger S1-1568 15 kV Insulation Resistance Tester
- S1-1568/2 from the ‘Expert Range‘ with high performance diagnostics
The Megger S1-1568 is the flagship of Megger’s Expert range, delivering the ultimate combination of high-voltage capability, advanced diagnostics, and extreme environmental resilience.
With up to 15 kV test voltage, 35 TΩ measurement range, and unrivalled 8 mA noise immunity with adaptive filtering, the S1-1568 is built for EHV testing in the most demanding power utility, industrial, and OEM applications.
It provides complete control over test currents, remote operation capabilities, and the robust construction needed for reliable use in field or lab 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 S1-1568?
When only the highest test voltage and the most advanced features will do, the S1-1568 is the tool of choice.
It’s designed for commissioning, maintaining, and troubleshooting the largest, highest-rated insulation systems — from EHV transmission cables to large rotating machines — with the accuracy and stability required for critical infrastructure.
Key features of the Megger S1-1568:
- RE>Act mode for improved safety and measurement reliability.
- Patented PI predictor (PIp) – reduces PI test time.
- Measures up to 35 TΩ at 15 kV.
- ±5% accuracy to 3 TΩ at 15,000 V.
- Advanced diagnostics: PDC, Ramp, Dielectric Discharge.
- 8 mA noise rejection with adaptive filtering for extreme EHV stability.
- Selectable test currents: 1–6 mA from battery or mains.
- Onboard memory with time/date stamped logging.
- USB and Bluetooth® LE connectivity.
- Remote control via USB.
- Safety rated CAT IV 1000 V (all terminals) to 4000 m altitude.
- Rugged dual-case design with large backlit colour display.
Specifications:
| Feature | Details |
| Max Test Voltage | 15 kV |
| Insulation Resistance Range | up to 35 TΩ |
| Accuracy | ±5% to 3 TΩ at 15,000 V |
| Noise Rejection | up to 8 mA |
| Test Currents | 1–6 mA selectable |
| Safety Rating | CAT IV 1000 V, 4000 m altitude |
| Connectivity | USB and Bluetooth® LE |
| Remote Control | Yes, via USB cable |
| Memory | Time/date stamped, onboard logging |
| Display | Large, backlit colour display |
| Design | Dual case with dust, moisture, and impact protection |
Built for your environment
From remote EHV switchyards to challenging industrial sites, the S1-1568 is built to handle it all. Its 8 mA noise rejection with adaptive filtering ensures rock-solid results in environments up to 1000 kV, while the dual-case design keeps the instrument safe from physical damage, dust, and moisture.
The bright colour display is designed for maximum readability in any light, from direct sunlight to night operations.
Applications:
- EHV transmission cable and switchgear testing.
- Commissioning and maintenance of large motors, generators, and transformers.
- High-voltage asset diagnostics in utilities and heavy industry.
- OEM testing and factory QA environments requiring remote control.
What comes with the Megger S1-1568?
- S1-1568 insulation resistance tester
- Li-ion rechargeable battery (pre-installed)
- Mains power lead
- Test leads rated for 15 kV
- User guide and quick-start reference
- Carry-all holdall with removable lid pouch
❓ Frequently Asked Questions (FAQ)
Q1: How is the S1-1568 different from the S1-1068?
A. The S1-1568 increases the maximum test voltage from 10 kV to 15 kV, making it suitable for the highest-rated insulation systems and EHV testing to industry standards.
Q2: Can I operate it remotely?
A. Yes – it supports full USB remote control.
Q3: Is it suitable for EHV environments?
A. Yes – it is optimised for stable performance in environments up to 1000 kV.
Q4: Does it offer all Expert range features?
A. Yes – it includes adaptive filtering, full current selection, onboard logging, and advanced diagnostics.
Category Comparison:
The S1-1568 is the top of the Expert range, offering:
- The highest test voltage (15 kV) in the lineup.
- Maximum noise immunity (8 mA) with adaptive filtering.
- Full test current selection and remote control.
- CAT IV 1000 V safety rating to 4000 m altitude.
Compared to the Advanced range (MIT525, MIT1025, MIT1525), it provides greater stability in extreme EHV conditions, adaptive filtering, and the ability to handle the most demanding insulation tests in the industry.
Ready for high-performance diagnostics?
Don’t leave faults to chance—get your Megger S1-1568/2 today!
Get the right test equipment at the right price — contact us now for a fast, competitive quote.
💬 Talk to the Experts
Our team is ready to discuss your requirements. Get straightforward advice, proven performance, and reliable solutions that work.
📍 Want to See It in Action?
We’ll bring the demo to you. Book a live on-site demonstration and see our test equipment perform in real-world conditions.