Division · own design and manufacture
Power electronics
Supplies, chargers and converters built for an exceptionally long life.
In-house design and manufacture is the pillar NES stands on. We design equipment for industry, utilities and rail with a focus on low energy use, reliability and service throughout its life.
Own design and manufacture
Solutions
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Cathodic protection Rectifiers and complete stations with remote supervision and GPS sync. Detail -
Electroplating Switched-mode rectifiers for plating lines, installed and serviced. Detail -
Railway electronics Control systems, traction and auxiliary electronics for vehicles since 1992. Detail -
Test benches & equipment HV supplies for vehicle test rooms and circuit-breaker testers. Detail -
Chargers & dischargers Programmable charging, capacity tests and remote battery monitoring. Detail - AC/DC power supplies Switched-mode AC/DC supplies, DC/DC converters, inverters and DC UPS. Detail
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Transducers Measuring transducers, isolation amplifiers, insulation meters, relays. Detail -
Contactless power transfer Powering moving and sealed equipment without contacts or cables. Detail -
Custom solutions Science, research and defence, single crystals, plasma, supercapacitors. Detail
Our principles
How we design
Modern digital design
Focus on low energy use
Exceptionally long service life
Quality service and support
References
Power electronics at work
Questions and answers
Frequently asked
Which battery chargers do you make?
SN-series chargers for stationary, traction and starter batteries (lead-acid, NiCd, NiMH) at 24, 48, 60, 110 and 220 V DC — from compact units to 19" rack systems, with programmable charging curves, temperature compensation and remote monitoring. For battery capacity tests we supply ZAKS dischargers.
Do you make cathodic protection rectifiers?
Yes, the SZK series in batches of thousands: switch-mode, efficiency above 90 % and power factor ≥ 0.96, output up to 120 A, constant potential, voltage or current modes, GPS-synchronised ON/OFF interruption and remote monitoring via the NES Control Server web application. Indoor, outdoor and Ex versions.
Do you supply rectifiers for electroplating?
Yes. Our SZ-series IGBT switch-mode supplies replace thyristor rectifiers — up to 92 % efficiency, ripple below 1 %, 1 – 100 % control and up to 10,000 A. We deliver them with installation, set-up and service; a new SiC generation arrives in 2026.
Can you design a supply that is not in the catalogue?
Yes — for example supplies for single-crystal growth with very low ripple, sources for plasma drilling and milling, supercapacitor recovery stations or DC UPS systems for substations. Send us the voltage, current and environment and we will prepare a solution.
Have a project on the table?
Need a custom power supply?
Send us your brief or call — a sales engineer or technician from the right division will get back to you.