Series NLN from 6.5V to 500V / 35W to 1.4kW


  • voltage and current setting with 10-turn potentiometers with precision scale; the adjusting knob can be locked
  • output voltage and output current are fast programmable
  • no output capacitor
  • all units are short circuit proof and allow unlimited operation with full current in short circuit condition
  • voltage and current regulation with automatic and sharp transition; control mode indicated by LEDs
  • 4½ digit DVM for voltage and current (for table-top models)
  • sense terminals for the compensation of voltage drop on the load lines, for units up to 350V nominal voltage. The rated voltage always refers to the output terminals
  • suitable also for inductive and capacitive loads
  • standard starting current limitation from 700W nominal power onwards


The mains voltage is transformed to the appropriate level and rectified. The rectified voltage charges a bank of capacitors of the intermediate circuit to a constant voltage, which it is given via a set of power transistors to the output. The series transistor defines the final stability of the output voltage and the regulation speed. Optionally a set of power transistors parallel to the output can act as a current sink to provide active pull down ability. The design of linear regulated power supplies is optimized for fast programming speed.


  • for 35W nominal power: ½19" table-top case
  • other models: 19" table-top case (19" rack adaptors available)
  • cooling: convection or built-in fan with air outlet on the rear


Output isolation The output is floating. Operating voltage with respect to earth: max. ±500V. Each of the output terminals may be connected to earth.
Output terminals 4mm safety connectors up to 20A on the rear panel. For higher currents clamps installed on the rear.

Technical Data:

Mains connection ≤ 1400W: 230V ±10% 47Hz to 63Hz ≥ 2800W: 400V ±10% 47Hz to 63Hz, three-phase
Ambient temperature 0°C to +40°C
Power loss At nominal load approx. 25%, during short circuit at nominal current approx 125% of the nominal power.

The following data applies for voltage and current regulation, and refers to the rated value, unless otherwise stated. (For explanations please refer toTerms and Definitions)

Setting range from approx. 0.1% to 100%
Setting resolution ±1 x 10-4
Residual ripple (0-10MHz) < 5 x 10-4pp + 10mVpp
Recovery time < 50µs for load changes from 10% to 100% or from 100% to 10%
Setting time at nominal load < 1ms for full range

for ±10% mains voltage variation:
< ±2 x 10-5

for no load / full load:
< 2 x 10-4

over 8 hours under constant conditions:
< ±2 x 10-4

within the temperature range:
< ±2 x 10-4 / K


Analogue programming All FuG power supplies are optionally available with an analog programming 0-10V (Standard with the series HCE and HCN 7E). This option is also available as retrofit set.
Computer interface IEEE 488, RS 232, RS 422, Profibus DP, USB, LAN (more on request)
DVM with higher resolution "Instead of the standard DVM with a display of max.""1999"", DVM with higher resolution can be offered."
Active down regulation Active down regulation for fast controlled decrease of the output voltage.
Higher programming speed Higher programming speed