Power supply type range

Design principle

NCA (floating output)

Switch mode power supply

Switch mode power supply

Series NCA/MCA ...		Printer friendly data sheet (PDF)
Features: Autoranging characteristic with constant power limitation 5 power classes: from 750 W to 9 kW 6 Voltages: 55 V to 3000 V Up to 1500V with floating output  Compact size (19" case) Light-weight High efficiency Short-circuit proof Unlimited operation with nominal power (even in short-circuit conditions) Voltage and current regulation with automatic, sharp transition and additional power limitation Control mode indicated by LED Voltage and current setting with10-turn potentiometers with precision scale; the adjusting knob can be locked 4½ digit DVM for voltage and current Suitable also for capacitive loads Sense connections to compensate voltage drop at the load cables for NCA Active down control for NCA

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Function:

Design:

• 19" table-top case (19" rack adapters available)

Output:

• Output isolation:
  up to 1500 V nominal voltage the output is floating. Either the positive or the negative pole may be connected to earth.

  (Not valid with the option analogue programming. If the floating function should remain, the floating analogue programming must be chosen).

  Maximum isolation voltage:

  up to 400 V nominal voltage: at 750 V nominal voltage:  at 1500 V nominal voltage: at 3000 V nominal voltage:

  ±500 V. ±1000 V ±2000 V one pole is earthed, the polarity must be indicated when ordering.

• Output terminals:
  Units up to 750 V nominal voltage have 4mm safety connectors.
  From 1500 V nominal voltage on SHV connectors are provided. HV-cable connectors are included.
  Units from 24 A nominal current on have binding posts.

Technical Data:

• Mains connection: 
  Up to 1500 W nominal power 230 V ±10% 47 Hz to 63 Hz;
  For nominal power 3000 W and higher 400 V ±10% 47 Hz to 63 Hz 3-phase
• Ambient temperature: 0°C to +40°C

• The following data applies for voltage and current regulation, and refers to the rated value (if not stated otherwise):
  (For explanations please refer to the Terms & Definitions page.)

  Setting range:	from approx. 0,1% to 100%
  Reproducibility:	±1 x 10-4
  Setting resolution (potentiometer):	±1 x 10-3
  Residual ripple:	<2 x 10-4pp + 200 mVpp
  Recovery time: Voltage control: Current control:	<1 ms for load changes from 10% to 100% or from 100% to 10%. <10 ms for load changes causing an output change of less than 10% of the rated voltage
  Setting time at nominal load:	<300 ms for changes of the output voltage from 10% to 90% or 90% to 10%
  Discharging time constant for output without load:	approx. 10 sec.
  Deviation:  for ±10% mains voltage variation: for no load / full load: over 8 h under constant conditions: within the temperature range:	± 1 x 10-5 <5 x 10-4 <±2 x 10-4 <±1 x 10-4 / K

  Possible Options:

• Analogue programming
• Analogue programming, floating
• DVM with higher resolution
• Computer interface - IEEE 488, RS 232, RS 422, USB, LAN (Ethernet), Profibus DP (more on request)

  More options and special solutions on request. Some options may involve changes to the description of the unit - especially concerning the mechanical design.

NCA/ MCA Data Sheet:

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For prices please ask us or one of our representatives.