Technical data

54
©
FuG Elektronik GmbH, D-83135 Schechen, Am Eschengrund 11
http://www.fug-elektronik.de, E-Mail: [e-mail]
V 0913
Absolute accuracy
The stated figure refers to the
absolute deviation of the DVM,
or of the monitors of the analog
programming. They are inde-
pendent of the stability data of
the individual series.
For all families with standard
data the following absolute
accuracy values apply:
 for all nominal voltages:
< ± 0,2% of the nominal value
 for all nominal currents within
the range > 5mA up to <
200A:
< ± 0,2% of the nominal value
 without this range:
< ± 0,5% of the nominal value
 additional error of the DVM:
< ± 2 Digits
Active pull-down control
Available on demand especially
for the NLN series: Power tran-
sistors parallel to the output
acting as a current sink.
Autoranging power supply
Power supply with automatic
ranging of the operating point.
without steps. These power
supplies can provide any combi-
nation of the rated current and
voltage - limited only by the
rated maximum available output
power.
Bipolar power supply
A bipolar power supply can be
adjusted from positive output
voltage and current to negative
with continuous zero crossing.
All bipolar power supply units of
FuG Elektronik GmbH are de-
signed for restricted 4-quadrant
operation. The electrical power
stored within the load can be
subsequently reabsorbed by the
power supply. On request the
units can be equipped for full 4-
quadrant capability.
CE mark
All FuG- power supplies have a
CE label - a guarantee of com-
pliance with the current EMC
and safety standards.
Certificate of calibration
All FuG- power supplies can be
calibrated at the factory. The
certificate of calibration, which
can be supplied on request,
confirms the compliance of the
output data with the catalogue
data:
 Indication on the DVM
 Monitor voltages*)
 Computer output data*)
 Reference voltage*)
 Linear coherence between
control voltage and output
value*)
*) Options
Charging current
FuG- capacitor charging power
supplies operate with constant
current. It is adjustable to every
value up to the nominal value.
On request, units are available
with enhanced charging current
at low voltage.
Charging power
Power specification for capacitor
charging power supplies. The
data is in J/s, and is valid for
charging from "0" to the nominal
voltage. For charging of a par-
tially discharged capacitor a
considerably higher charging
power, up to double, can be
supplied.
Chopper controlled
See Switch mode power supply.
Deviation (Stability data)
This term is always referred to
the nominal parameter value
and is valid for operation under
constant operating conditions.
Constant operating conditions
means that, in each case, all
other conditions such as the
load, ambient temperature and
mains voltage are constant:
a) Deviation of the output volt-
age (or output current when
specified) for ±10% variation
of the line voltage.
b) Deviation of the output volt-
age (or output current when
specified) over a period of 8
hours, after an appropriate
warm up time.
c) Deviation of the output volt-
age at load changes from
full load to no load.
Discharge time constant
This data always relates to the
unconnected output. It is the
time taken for the output voltage
to decay to approx. 37% of the
adjusted voltage after the output
has been switched off.
Double stabilized power sup-
ply
Such units are equipped with a
thyristor pre-regulator followed
by a linear transistor regulator
stage. The high efficiency of the
thyristor pre-regulator stage is
combined with the high regula-
tion characteristics of a linear
regulator.
Dump switch
Rapid discharge switch for the
controlled discharging of inter-
nal and external capacitors.
(see also Interlock)
Efficiency
The efficiency of the units de-
pends on the respective operat-
ing point. At full load a figure of
85 -95% will be reached with
switched and thyristor regulated
power supplies ,whilst 70 -90%
is achievable with linear regu-
lated power supplies with thy-
ristor pre-regulation.
Electronic load
A unit, which has the behaviour
of an adjustable load resistor.
Usually, it is used for testing
power supplies. Depending on
the design, it is possible to
adjust and regulate the re-
sistance, the load power or the
load current. FuG offers cus-
tomized electronic loads on
request.
EMC
Electro Magnetic Compatibility.
See Regulations and Stand-
ards.
EURO-size
19" cassette system cases, 3U
Fast de-energizing
Option for super conductor
supplies for controlled de-
energization of super conduct-
ing coils/magnets at quench.
Final charging voltage
Preset voltage for capacitor
charging power supplies up to
which the capacitor shall be
charged.
Floating output
The specified output terminals
have no DC connection to other
parts of the unit or to ground.
The maximum potential differ-
ence (isolation voltage) is indi-
cated.
IMS-size
Older size of plug-in cases, 4U
Interlock
Loop for switching off the output
voltage when disconnected.
Mains disconnection of the
power stage, but without any
forced discharging of the output
or load. (see also dump switch)
ISO 9001
Since 1994 FuG has maintained
this quality assurance system.
All supplied units are tested
(using calibrated measuring
instruments) and the results are
recorded in our test department,
so as to ensure that all units
shipped are fully in accordance
with their specification.
Linear regulation
Control of energy flow by one or
more of bipolar or field effect
transistors which are switched
in series to the load and operat-
ed with the linear part of their
characteristic.
Mains connection
Stated is the mains voltage, the
permissible tolerance (±10%),
the line frequency range and
the type of mains connection,
e.g. single phase, two-phase or
three-phase. Connection of N
(neutral) and PE (protective
earth) are always necessary.
Nominal current
Maximum available current.
Nominal power
Maximum available power from
the power supply. No higher
power is available - even for a
short time. For FuG- power sup-
plies the first number in the type
name is the power class or the
main component of the power
supply. This value is approxi-
mately (but may be not exactly)
the nominal power.
Definitions and Terms