The EL+ vHF/DC ePlus series from CINERGIA is a high-precision family of bidirectional, regenerative electronic loads specially designed for use in the avionics sector. It enables realistic simulations of aircraft power grids in the frequency range of 360-900 Hz and supports both AC and DC test applications.
The regenerative technology allows energy to be fed back into the grid during test operation, which lowers operating costs and reduces the environmental footprint. Typical areas of application are:
- Testing aircraft generators with variable frequency and different power factors
- Simulation of electrical loads and power supply units in the avionics sector
- Programming of complex power, current or impedance profiles
- Generation and analysis of harmonics and distortion profiles up to the 50th harmonic
- Simulation of electrical loads and power supply units in the avionics sector. Harmonics
- Simulation of transients, voltage dips and mains interference for robustness tests
Focus on the EL20+ vHF/DC variant
The EL20+ vHF/DC is the balanced mid-range model in the series and, with 20 kW nominal power, offers an ideal ratio of power reserve, dynamics and efficiency. It is particularly suitable for medium-sized avionics test systems, generators with higher power requirements or multi-channel setups with realistic current consumption.
- AC (EL-HF): 26 A RMS per phase in 3-channel operation or 78 A RMS in 1-channel operation
- DC: ±25 A (3-channel) or ±75 A (1-channel)
- Frequency range: 360-900 Hz in high-frequency mode
- Backfeed capable: Energy feed into the grid with >90 % efficiency
This variant combines compact design with high power density and is therefore ideal for test laboratories, test benches and universal development environments that require flexible load profiles with constant precision.
Comparison with the other models
The EL+ vHF/DC series comprises five power levels. The EL20+ is positioned between the compact EL15+ and the more powerful EL30+, while retaining the same range of functions of the entire series:
- EL15+ vHF/DC: 15 kW, AC 20/60 A, DC ±20/±60 A - ideal for smaller test systems
- EL20+ vHF/DC: 20 kW, AC 26/78 A, DC ±25/±75 A - universal mid-range
- EL30+ vHF/DC: 27 kW, AC 40/120 A, DC ±30/±90 A - for higher currents and large loads
- EL40+ vHF/DC: 40 kW, AC 52/156 A, DC ±40/±120 A - for multi-channel test environments
- EL50+ vHF/DC: 50 kW, AC 65/195 A, DC ±50/±150 A - maximum power and scalability
The EL20+ offers noticeably more power reserves and flexibility compared to the EL15+ with almost identical dimensions. Compared to the EL30+, it is more energy-efficient, lighter and requires less mains power - an advantage for laboratories with limited infrastructure.
Product features of the series:
- High-frequency electronic load for avionics: 360-900 Hz
- Bidirectional & regenerative: Energy fed back into the grid for maximum efficiency
- Clean grid current: THDi < 3 % and power factor > 0.98 at rated power
- Power levels: 15-50 kW, expandable via master/slave network
- Operating modes AC/HF: Current, power and impedance mode with freely selectable cos φ
- Operating modes DC: CV, CC, CP, CR; multi-channel operation with independent setpoints
- Harmonic & distortion: up to the 50th harmonic, freely programmable
- . Harmonics, freely programmable
- Fast dynamics: Rise times typ. < 2 ms (depending on mode)
- Steps/sequence mode: precise sequences for test automation with µs resolution
- Mains connection: 3×400 V AC +N+PE, 48-62 Hz
- HF voltage ranges (EL-HF): 35-277 Vrms ph-N resp. 35-480 Vrms ph-ph
- DC range: up to 750 V (HV option up to 800 V)
- Overload capacity: up to 200 % for short-term transients
- Safety functions: emergency stop, interlock, overvoltage/overcurrent protection, watchdog
- Communication: 4.3″ touch display, analog/digital IOs, LAN Modbus-TCP, optional interfaces (RS485, CAN, RS232)
- Options: battery emulation, PV emulation, low-ripple mode, HV option, anti-islanding monitoring
- Compact design: typ. 770×450×1100 mm, approx. 170 kg (depending on model)
