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Low Voltage Power
Supplies
Overview:
(The values in this table are edge-values for
the resp. type range. The adjustment range for the power supplies usually is
beginning from zero.)
| Series
NTN ... |
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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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Function:
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.
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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 |
Possible Options:
NTN
Data Sheet:
|
| Series
NYN ... |
|
Printer
friendly data sheet (PDF) |
 |
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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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Function:
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
Possible Options:
NYN
Data Sheet:
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Please don't hesitate to contact us, if
you don't find for what you are searching. We will be happy, to offer a solution,
tailored especially to your needs.
Examples for customer specific solutions
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zur deutschen Version
22.10.12 08:27 |