CT / VT Testing
Verify instrument transformer performance for reliable measurement and protection.
Explore ServiceMEGGER · SVERKER 900
Megger SVERKER 900 Relay and Substation Test System
A three-phase relay and substation test system for electrical distribution substations, renewable power generation stations and industrial applications, combining three current and four voltage sources with a range of measurement possibilities.
Official Megger product photography
Relay and substation testing
Testing capabilities
- Three current and four voltage generators, individually adjustable in amplitude, phase angle and frequency
- Sources usable separately, in parallel or in series — up to 105 A AC or 900 V AC in single-phase mode
- Basic manual three-phase secondary testing of protection devices, plus primary testing
- Fourth voltage source for testing numerical relays that need a busbar reference voltage
- CT excitation curve plotting, CT/VT ratio tests, burden measurement and polarity tests
- Intuitive user interface on a 5.7 in LCD touch screen with control knob
- Frequency range DC, 10–600 Hz for marine and aeronautical 400 Hz systems
Manufacturer-published capabilities. Available tests depend on the selected configuration and accessories. Confirm suitability, availability and pricing with our technical team.
Technical specifications
| Manufacturer / model | Megger / SVERKER 900 |
| Current channels | 3 × 35 A AC or DC (up to 105 A in single-phase mode) |
| Voltage channels | 4 × 300 V AC or DC (up to 900 V in single-phase mode) |
| Output frequency range | DC, 10–600 Hz |
| Binary inputs | 6, independently programmable for voltage or contact monitoring |
| Display | 5.7 in LCD touch screen |
| Interfaces | USB, Ethernet |
| Standards | IEC 60255-151:2009 reference curves; IEC 60255-181:2019 frequency ramp; IEC 60068-2-27 shock, IEC 60068-2-6 vibration |
| Dimensions / weight | 350 × 270 × 220 mm / 15.2 kg (instrument only) |
| Environmental | 0 °C to +50 °C operating; −40 °C to +70 °C storage |
Downloads
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