Power supply type range

Design principle

Linear regulated power supply with thyristor pre-regulation

Thyristor regulated power supply

Switch mode power supply

Switch mode power supply

Switch mode power supply

Thyristor regulated power supply

Switch mode power supply

Series NTN ...		Printer friendly data sheet (PDF)
Features: High efficiency Short circuit proof and unlimited operation with full current in short circuit condition voltage and current regulation with automatic and sharp transition; control mode indicated by LEDs Voltage and current setting with 10-turn potentiometers with precision scale; the adjusting knob can be locked 4½ digit DVM for voltage and current (for table-top models) Sense terminals for the compensation of voltage drop on the load lines. The nominal voltage always refers to the output terminals Parallel and series connection possible Suitable for inductive and capacitive loads for 700 W nominal power and higher, limitation of inrush current on switching on Interlock loop to monitor the external load and internal loop as a standard for three phase units Elapsed-hour meter as a standard for three phase units

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The mains voltage is transformed to the appropriate level. On the secondary side of the transformer, a controlled rectifier with thyristors (phase cutting circuit) is installed. The rectified voltage charges a bank of capacitors of the intermediate circuit, from which it is given via a serial regulating transistor and a small LC-filter to the output. By switching-on the thyristors with a distinct delay after each zero-crossing of the sinusoidal voltage, the flow of energy is controlled in a way to have a defined voltage drop at the serial transistor (pre-regulation). The serial transistor defines the final stability of the output voltage (main regulation).

Design:

• Up to 140 W nominal power ½19" table-top case
• For 350 W nominal power or higher 19" table-top case
• 19" Rack-adapters for mounting into a 19" rack are available as accessory
  
• For 7 kW nominal power or higher 19" cabinet. Height depending on type. The side covers are detachable, the rear door is lockable.
• All cabinets are equipped with fork-lift-compatible plinths and removable crane-eyes.
• Single 19"- cabinets up to  38 HU are are easily transportable by fork-lift.
• The cooling is carried out via built-in Fans, the output air is derived (type depending) to the rear side or via the top. For units of high output power water cooling can be made. 

Output:

• Output isolation:
  The output is floating. Operating voltage with respect to earth: ±500 V, either the positive or the negative terminal may be connected to earth. For units equipped with the analogue programming: the "0V" of the analogue programming is connected to the positive output.
• Output terminals:
  Output terminals are on the rear panel. Up to 20 A output current, 4 mm safety connectors are used. For current up to 300 A - clamps are fitted, for higher currents we use copper bars.

Technical Data:

• Mains connection:
  

  up to 1400W nominal power:	230 V ±10% 47 Hz to 53 Hz
  for 2800W and 4200W:	400 V ±10% 47 Hz to 53 Hz, two-phase
  for 7000W and higher	400 V ±10% 47 Hz to 53 Hz, three-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:	<1 x 10-4pp + 10 mVpp
  Recovery time: Voltage control: Curent control:	<50µs for load changes from 10% to 100% or from 100% to 10% <500 ms for load changes causing an output change of less than 10% of the rated voltage Units with >65V output voltage will switch off for a short time at high and fast load changes.
  Setting time at nominal load:	100 ms to 500 ms for changes of the output voltage from 10% to 90% or 90% to 10%
  Discharging time constant for output without load:	approx. 2sec. to 60sec., depending on type
  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 <2 x 10-4 <±1 x 10-4 <±1 x 10-4 / K

Possible Options:

• Coarse/fine-potentiometer (99% / 1%) for more accurate adjustment of voltage and / or current
• Analogue programming (The positive output has to be earthed)
• Analogue programming, floating
• Computer interface - IEEE 488, RS 232, RS 422, USB, LAN (Ethernet), Profibus DP (more on request)
• DVM with higher resolution
• Higher stability
• Power limitation
• Roller blades instead of plinths for cabinet units

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

NTN Data Sheet:

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For prices please ask us or one of our representatives.

Series NYN ...		Printer friendly data sheet (PDF)
Features: Simple construction Extremely robust High efficiency Short circuit proof and unlimited operation with full current in short circuit condition Voltage and current regulation with automatic and sharp transition; control mode indicated by LEDs Voltage and current setting with 10-turn potentiometers with precision scale; the adjusting knob can be locked 3½ digit DVM for voltage and current Sense terminals for the compensation of voltage drop on the load lines. The nominal voltage always refers to the output terminals Limitation of inrush current on switching on Suitable for inductive and capacitive loads Interlock loop to monitor the external load and internal loop as a standard Elapsed-hour meter as a standard

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The mains voltage is transformed to the appropriate level. On the secondary side of the transformer, a controlled rectifier with thyristors (phase cutting circuit) is installed. The rectified voltage is smoothed by a LC - filter.

Design:

• Depending on Voltage and Power the units are built as single or double 19" cabinets of various height. The side covers are detachable, the rear door is lockable.
• ll cabinets are equipped with fork-lift-compatible pliths and removable crane-eyes.
• Single 19"- cabinets up to  37 HU are also suitable for transportation by fork-lift.
• The cooling is carried out via built-in Fans, the output air is derived (type depending) to the rear side or via the top. 

Output:

• Output isolation:
  The output is floating. Operating voltage with respect to earth: ±500 V, either the positive or the negative terminal may be connected to earth.
• Output terminals:
  All output terminals are located at the rear side of the cabinet. For Output current up to 300A feed though terminals are equipped; for higher current, the output is made by copper bars.

Technical Data:

• Mains connection:
   400 V ±10% 47 Hz to 53 Hz, three-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. 1% to 100%
  Setting resolution (potentiometer):	±2 x 10-4
  Reproducibility:	±1 x 10-3
  Residual ripple:	<1 x 10-2pp + 100 mVpp
  Recovery time:	<100 ms to 500 ms (depending on type) for load variations of  ±10%
  Setting time at nominal load:	<100 ms to 2 sec (depending on type) for changes of the output voltage from 10% to 90% or 90% to 10%
  Discharging time constant for output without load:	approx. 5 sec. to 60 sec., depending on type
  Deviation:  for ±10% mains voltage variation: for no load / full load: over 8 h under constant conditions: within the temperature range:	<±1 x 10-4 <±1 x 10-3 <±3 x 10-4 <±3 x 10-4 / K

Possible Options:

• Analogue programming (One of the outputs has to be earthed)
• Analogue programming, floating
• Computer interface - IEEE 488, RS 232, RS 422, USB, LAN (Ethernet), Profibus DP (more on request)
• Internal resistance setting and regulation
• Power regulation with display
• DVM with higher resolution
• Roller blades instead of plinths

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

NYN Data Sheet:

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For prices please ask us or one of our representatives.