FuG Elektronik GmbH Am Eschengrund 11 D-83135 Schechen
Tel.: +49(0)8039/40077-0 Fax: +49(0)8039/40077-99 info@fug-elektronik.de www.fug-elektronik.de
Medium Voltage Power Supplies
MCA - Series
power classes up to 9000W
certified according to
ISO 9001 : 2008
Operating Instructions
This instruction is only dedicated to electrical experts and people with a suitable technical
education, which are familiar with electrical risks and can keep the risk for themselves and other
people as low as possible.
For the operation of this unit only a.m. persons are admitted.
MCA -Serie FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen
File: MCA Rev_3 Englisch.docx Rev 3 2 von 16
Content:
1. Safety Instructions ............................................................................................................... 3
2. General ................................................................................................................................ 4
2.1 Setup Information ................................................................................................................ 5
2.2 Preparation for commissioning ............................................................................................ 5
3. Description ........................................................................................................................... 6
3.1 Front Panel, Controls ........................................................................................................... 6
3.2 Rear side, Connections........................................................................................................ 7
3.3 Assembly ............................................................................................................................. 7
3.4 Mode of operation ................................................................................................................ 8
4. Operation with local controls ................................................................................................ 9
5. Maintenance ...................................................................................................................... 10
6. Options .............................................................................................................................. 11
6.1 Analog Programming ......................................................................................................... 11
6.1.1 Directly Connected Analog Programming .......................................................................... 11
6.1.2 Floating Analog Programming (2kV) .................................................................................. 11
6.2 Digital Interface PROBUS V (Option)................................................................................. 14
7. Technical Data ................................................................................................ ................... 15
8. Calibration .......................................................................................................................... 16
9. Certificate of Conformity .................................................................................................... 16
10. Accessories ....................................................................................................................... 16
11. Warranty, Repairs .............................................................................................................. 16
12. Special Models, Modifications ............................................................................................ 16
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File: MCA Rev_3 Englisch.docx Rev 3 3 von 16
Adhere strictly to the operating instructions before you either change
switches, or connect sockets, marked with this symbol!
Symbol for high Voltage outputs
Symbol for cassis earth, potential safety earth
1. Safety Instructions
The units of the series MCA deliver dangerously High Voltages! Ensure that
nothing, and nobody, will be endangered by this High Voltage before putting the
unit into operation!
Attention ! The full dielectric strength of the high voltage connectors is only achieved if
fully mated together.
Before Commissioning Make sure that you have read and understood the operating instruction manual!
Ensure that you observe all the hints and warnings contained within it. In not following
the operating instructions, you contravene the safety regulations for operating units of
this type. FuG accepts no liability for consequences arising from the failure to follow
these safety instructions.
Mains voltage Check whether the input voltage for your power supply, noted on the type label,
corresponds to your actual mains voltage.
Earth The unit is provided with a safety earth (German safety class I). For protection against
electric shocks, the unit must be connected to the mains via a suitable 3 or 5-pole
cable with a non-fused earth conductor.
For electrical potential equalization to the load, and to the center of the AC-supply, the
earth stud must be used.
High leakage current! Labeled by a sticker on the rear. At a high leakage current is an earth connection to
the Earth stud mandatory.
Operating environment The units may only be operated in a clean, dry environment.
Please make sure that no objects or liquids can enter the casing through the
ventilating apertures.
Because of the risk of sparks, the unit must not be operated in the vicinity of
flammable gases or fumes.
Cooling To ensure a adequate cooling, the ambient temperature must not exceed 40°C.
This unit is air cooled by convection or at units >800J/s by forced ventilation.
Therefore , please ensure an adequate air-flow is available, and ensure that nothing is
placed either above or below the unit which may impede this air-flow.
Don’t operate table top units without the mounted legs.
Do not expose the unit directly to solar radiation.
If the unit is used as a plug-in component, sufficient air-flow must be provided,
(1HU = 44,5 mm above and below clear).
Opening the unit Before opening, ensure that the unit is disconnected from the mains!
The unit may be opened by operating personnel only for the purpose of operating
switches as described in the operating instructions, (e.g. baud rate switch of Probus V,
which is inside).
Danger: The electronic boards inside the power supply are connected to one output
pole. During operation, the electronic boards lie on up to 2000V.
ATTENTION! The unit contains capacitors, which discharge only very slowly (typical
discharge time 5 min) or, in worst case, do not discharge at all.
For switch over use isolated tools only.
Maintenance or repair of this unit should only be carried out by trained service
personnel who are aware of the inherent dangers of such equipment.
Symbols
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2. General
The units of the series MCA (Medium Voltage Chopper Autoranging Power Supplies)
are high stable DC- power supplies..
High Voltage Output ATTENTION The units supply dangerously HIGH VOLTAGE!
Polarity At units up to 1500V nominal voltage the output is floating. Either the positive or the
negative output pole may be connected to earth.
Units with 3000V nominal voltage will be delivered with positive or negative polarity.
The polarity has been fixed in the factory and cannot be changed. One output terminal
carries high voltage, the other pole „0V“ is intern connected to earth via a wire link.
Output Isolation At units up to 400V nominal voltage each output terminal may float up to max. ±500V,
Load and “0V” Terminal at 750V nominal voltage up to max ± 1000V
and at 1500V up to max. ±2000V with respect to earth.
Short-circuit Protection All units are short-circuit proof. The maximum current can be supplied for all output
voltages, even into a short-circuit.
ATTENTION! During short-circuit or flash over, the internal filter-capacitors will
be discharged very fast. The output current is only limited by internal safety
resistors, and can reach 500 x the nominal value.
Load Types The type of load is not critical. All passive bipolar loads can be connected.
Power Limitation The maximum of supplied power is limited 750W / 1500W / 3000W.
Series Connection A series connection is possible, paying attention to the stated output isolation. That
means, at a series connection of power supplies the sum voltage of both power
supplies may not exceed the mentioned value.
Parallel Connection Parallel connection of power supplies with same output voltage is supported.
Type Number From the type number you can see both the power class and the maximum output
voltage of the unit.
Example: MCA 750 - 3 000 = Power class 750W / Nominal voltage 3 000V
Modified types with differing electrical or mechanical data are indicated by "MOD"
within the type number on the label at the rear panel.
(In this case pay attention to the description in section 8)
Serial Number The label on the rear of the unit, the technical manual and the circuit diagrams show
the serial number.
It has the following content:
IMPORTANT Please indicate on all further enquiries for warranty, service or spare parts
orders the serial number and the model number of the unit.
internal order number
Item number
Consecutive number out of this item
Serial No.:
AAAAA-PP-NN YYYY/MM
Delivery Year / Month
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File: MCA Rev_3 Englisch.docx Rev 3 5 von 16
2.1 Setup Information
Operating position The units may only be operated in horizontal position.
Class of pollution The units are designed for the pollution class 1 (normal, not conductive pollution).
EMC The units are built according to current standards. When length of signal- and control
lines <3m.
Transport If the power supply is equipped with lifting appliances or handles, the weight of the unit
must be shared to these points.
2.2 Preparation for commissioning
Mains Voltage Check whether the input voltage for your power supply, noted on the type label,
corresponds to your actual mains voltage. Use only the enclosed delivered mains
cable.
Earth, Safety Conductor The unit is provided with a safety earth (German safety class I). For protection against
electric shocks, the unit must be connected to the mains via a cable with a non-fused
earth conductor.
For electrical potential equalization to the load, and to the center of the AC-supply, the
earth stud must be used.
High leakage current! When this sticker is placed on the rear side of the unit or the text “High leakage
current” is engraved , the unit must be grounded properly by using the appropriate
grounding bolt with a cable of at least 10 mm ² cross section.
Fuses Internal: See type label.
External: On mains side next higher size, characteristics delay-action or if
automatic cut-out is used, characteristics "C" or "K".
Return Current Flow The return current must not flow via the mains earth!
The screen of a HV-cable is always connected to earth. Only in some cases it may be
used for the return current.
Load and "0V“ Terminal At units up to 400V nominal voltage each output terminal may float up to max. ±500V,
at 750V nominal voltage up to max ± 1000V and at 1500V up to max. ±2000V with
respect to earth.
Attention At units with 3000V nominal voltage one pole lies on the HV terminal, the other one on
the „0V“ terminal and is intern connected to earth by a wire link. In this operation mode
the screen of the HV-cable may be used for the return current.
Earthy Operation The link between „0V“ and earth may be disconnected by the customer.
Open the unit, you will find this wire link inside between the „0V“ and the earth
terminal. Pay attention to the safety instructions!
Attention The „0V"-terminal than is earthy and may float up to max. ±300 V. For the return
current a separate isolated line back to the „0V“ terminal has to be used, the screen of
the HV-cable in this case must not be used, it always lies on earth.
In this operation mode the „0V“ terminal is protected against overvoltage by an
overvoltage arrestor with 350 V, which must not be stressed for a longer time.
Therefore it should be put on a fixed potential between 0 and 300 V.
Danger! On load side a suitable overvoltage arrestor (or earthing) must be provided to assure,
that due to a inadvertent opened 0V back connection on the power supply, the voltage
does not exceed the a.m. values with respect to earth.
Use only safety connectors according to IEC 1010-1 or VDE 0110.
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File: MCA Rev_3 Englisch.docx Rev 3 6 von 16
3. Description
In comparison to the standard powers applies the MCA-series offers a threesomes higher current/voltage range. The
power is limited to the maximum value. Power supplies of the series MCA will be delivered in 19" table-top cases,
depending on type. Rack adapters for table-top units are available as accessories.
3.1 Front Panel, Controls
Figure: Front panel of a MCA 750 – 1500 unit. The dimensions of devices with higher power are different to this type.
1
Mains Power Switch. Provides two pole
isolation from mains network
13
current display:
flashing: set value is displayed
non flashing: actual value is displayed
2
Output release. No mains disconnection.
14
indicates control state Constant Voltage CV
3
Output release status.
Indicates controller and output active.
15
indicates control state Constant Current CC
4
(Option) Selects control between LOCAL and
REMOTE
16
switches display to set value
5
(Option) Selects control between
REMOTE/ANALOGUE and REMOTE/DIGITAL
17
Potentiometer for voltage set value limitation
(adjustable only with a tool)
6,7,8
(Option) Indicates the active control input
18
indicates active voltage set value limitation
9
(Option) indicates Data traffic on digital
interface
19
indicates overtemperature
(ambient temperature too high, fan failed or dusty)
10
lockable Potentiometer for voltage set value
20
(Option) indicates control state power limitation
11
lockable Potentiometer for current set value
21
Operating range of MCA units
12
voltage display:
flashing: set value is displayed
non flashing: actual value is displayed
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File: MCA Rev_3 Englisch.docx Rev 3 7 von 16
3.2 Rear side, Connections
Figure: Rear side of a MCA 750 – 1500 unit. The dimensions of units with higher power and/or
other voltages are different to this type. In this case the arrangement of the elements
can be different as shown above.
1.
Mains power input, built in fuses
up to 700W: Mains plug as shown above.
1400W and higher:
Tightly with automatic cutout and cable connection or mainsplug C20 (IEC60320).
2.
earth stud. (only with high leakage current)
3.
mounting place for optional analog programming
4.
mounting place for optional interface Probus V (i.e. IEEE-488, RS232, USB, LAN)
5.
Positive high voltage output socket
6.
Negative 0V connector (internally connected to earth, connection can be removed if necessary)
7.
earth stud.
3.3 Assembly
The power supply consists basically of 4 main units
Mains source and oscillating unit
HV-transformer, HV-rectifier with filter, HV-divider and current measuring shunt
Control unit with measuring and control amplifier, reference voltage source,
pulse width modulator, source for the control unit from the mains transformer
and
a ±15 V voltage stabilizer.
Front panel board with 7-segment display, microcontroller, digital calibration
2
4
13
8
6
7 5
i
0507100001-2
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File: MCA Rev_3 Englisch.docx Rev 3 8 von 16
3.4 Mode of operation
The rectified mains voltage feeds the rectangular push-pull oscillator stage. For the
regulation, the rectangular voltage is pulse width modulated.
High voltage This rectangular voltage is transformed by a HV-transformer and dependent on type or
nominal voltage rectified by a bridge or a multiplier circuit.
Filtering The High Voltage so generated is filtered by a R-C- filter and fed to the output via a
protection resistor.
Voltage measurement A precision HV-divider feeds the measured voltage to the control circuit. For a better
performance, a voltage derived from a capacitive divider on the end of the rectifier is
added. The divided voltage is normalized by an integrated amplifier
to +10V = Vnominal.
Voltage control The normalized voltage forms the actual value for the control amplifier. The measuring
socket and the V-monitor are also supplied from this voltage. The voltage control
amplifier compares this voltage with the setting voltage (reference voltage divided by
the setting potentiometer or an external programming voltage).
The difference is amplified and fed, as control signal, to the input of the PWM- circuit,
which drives the oscillator unit.
Monitor The normalized actual value (0 - 10V = 0 – nominal value) is also the reference for
the measuring voltage on the monitor terminals.
Voltage limitation The voltage set value can be limited by a potentiometer on the front panel. The
limitation is always active, independent of the operation mode of the power supply.
Current measurement The current in the earthy pole of the HV-rectifier flows through a current measuring
resistor.
The voltage drop on this resistor is also normalized by an integrated amplifier,
(+10V = nominal current).
Current Limitation This nominal voltage is also used as actual value for the current limitation and is
connected to the current monitor. The control amplifier for the output current limitation
compares this voltage with the setting value. The difference gets amplified and is feed
to the input of the PWM
Power Limitation The product of the normalized current and voltage monitors.
The output power is limited to the maximum value up to 9000W.
The operation in power limitation is indicated by the yellow LED “Power Limit”.
The transition between voltage control, current control and power limitation occurs
automaticly.
Internal supervision The ±15 V source of the control electronics is monitored.
Operation of the control unit is only released if the supply voltages are within their
limits.
Overtemperature The temperature of the internal power circuits in fan cooled units is monitored. In case
of overtemperature, the power circuits are electronically switched off and LED OT
(overtemp) goes on.
Reset after cooling down by switching the unit off and on again.
Possible reasons for overtemperature: fan blocked or dusty, ventilation slits blocked
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File: MCA Rev_3 Englisch.docx Rev 3 9 von 16
4. Operation with local controls
The unit delivers dangerously High Voltage!
Please notice in particular safety instructions in section 1
and Load and 0V connection in section 2.2
Select local operation If your power supply is equipped with one of the options analog or digital
programming, set switch (4) to LOCAL.
Save switch on First, set switch OUTPUT (2) to OFF.
Now, you can switch on the Power Switch (1). The output will remain OFF.
The LED LOCAL (6) is on, indicating local operation.
Set value Display Shortly pressing SET VALUES (16) switches both displays to display the valid set
values.
With potentiometers Voltage (10) and Current (11) the needed setvalues can be
adjusted.
The displays begin to flash, indicating the set value display mode, and switch back
after some seconds to actual value display.
Pressing the SETVALUES key longer than app. 2 seconds, the displays stay in set
value display mode until the key is pressed again.
Adjustment Range The internal potentiometers provide an adjustment range of appr. 0,1% to 100% of
their nominal value.
Adjustment of voltage limit Turn the voltage potentiometer clockwise to its limit and switch to set value display.
Now you can adjust the maximum voltage with a screwdriver on potentiometer (17).
During this, the LED V-LIMIT is on and the limitation voltage is displayed on the left
display.
If you wish no limitation, simply turn the potentiometer (17) clockwise to it's limit. LED
V-LIMIt goes off.
Turn voltage potentiometer back to the desired setvalue and switch display mode to
actual value display (press key SET VALUES (16))
The voltage limitation is always active. It limits the maximum output voltage
also in operating mode analog programming or digital programming.
OUTPUT release After adjustment of the set values, the output voltage can be release with switch
OUTPUT (2).
The LED ON (3) indicates the released output.
Control mode indication Depending on the adjusted set values and connected load, the power supply will run
either in constant voltage CV (14) or constant current mode CC (15).
Power Limitation The output power is limited to the maximum value 750W / 1500W / 3000W.
The operation in power limitation is indicated by the yellow LED “Power Limit”.
The transition between voltage control, current control and power limitation occurs
automatically.
Save switch off The following switch off procedure is recommended:
First, inhibit the output with key OUTPUT (2). LED ON (3) goes off.
After the output voltage has reached a low and save value, you can switch off the
power supply with switch POWER.
This procedure gives you more safety, because the slow ramping down of the output
voltage can be monitored on the display.
At immediate switch off with POWER switch, there could be charged capacitors
remaining on dangerously high voltage that cannot be recognized.
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File: MCA Rev_3 Englisch.docx Rev 3 10 von 16
Operating area of MCA units
Auto ranging power supplies from FuG have a
three times larger operating area, compared
with standard power supplies with equal power.
The power supply can operate with full nominal
voltage and about 1/3 nominal current - or full
nominal current and about 1/3 nominal voltage.
Other values correspond to the left diagram
(e.g. 66% nominal voltage at 50% nominal
current).
5. Maintenance
At units with fan the fan grids must be cleaned from time to time, depending on the
pollution.
For the rest the MCA series needs no maintenance.
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File: MCA Rev_3 Englisch.docx Rev 3 11 von 16
6. Options
6.1 Analog Programming
Features Controlling of Voltage, current and output on/off by the analog interface.
Provides the readout of actual values as analog voltages and latest control modes as
digital status signals.
Select analog programming Set switch (4) to REMOTE.
If the power supply is additionally equipped with option Probus V (digital
programming), set also switch (5) to ANALOGUE.
LED ANALOGUE (7) indicates analog programming selected
Now, the power supply is controlled by the signals on connector (3).
Voltage and current are controlled by standard control voltages of 0..10V.
0...10V control voltage can be derived from an external potentiometer or some other
source, i.e. PLC.
Through special connections internal and external control can be combined. See
examples below.
Voltage limitaion The voltage set value limitation is always active. Adjustable with Potentiometer V-
LIMIT (17) on the front panel.
Cable shielding Connection cables to the analog programming connector must be shielded.
The cable shield must be connected to earth, i.e. to the mounting nuts of the
connector.
Three versions Please refer to 6.1.1, Fehler! Verweisquelle konnte nicht gefunden werden. and
6.1.2
6.1.1 Directly Connected Analog Programming
ATTENTION! The reference pins "0V" (pin 6 and 9) for all external programming voltages are
connected to the 0V output terminal "A-".
At an open connection to "0V" - earth, the programming can float up to ± 300 V.
Please make sure that the connection cable for the programming and the following
equipment has a dielectric strength of min. 500V against earth (screen).
(A programming connector with 500 V rating is enclosed).
Precision, Linearity, Stability and Temperature Drift
Due to the direct coupling, there is no degradation of the power supply performance.
6.1.2 Floating Analog Programming (2kV)
Mode of Operation The analog signals for voltage and current set values as well as the monitor signals for
voltage and current are galvanically isolated by means of optical fibre.
Digital signals are also isolated with optical fibre.
Identification You can see, if your power supply is equipped with directly connected or floating
analog programming on a label or engraving "FLOATING ANALOGUE
PROGRAMMING“ on the backpanel.
Pin Assignment Same as Directly Connected Analog Programming, but Pins 4 and 5 are not
connected. Use of internal potentiometers not possible.
Isolation There is no galvanic connection between the power supply output potential and the
programming potential. The isolation is rated for 2kVDC.
The 0V potential of the power supply can be operated fully floating up to +/- 300V.
Maximum potential on the programming connector is ±30V DC with respect to earth.
Accuracy, Linearity <±1x10-5 based on nominal value (10V)
and Stability
Temperature Drift <±1x10-5/K of nominal value (10V)
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Examples for wiring an analog interface:
Note: An external voltage adjustment implicitly requires the wiring of the current control and
vice versa!
The reference voltage (+10V) or the set value voltages can be supplied by some other
sources, i.e. PLC or PC plug-in cards (0V must be connected)
The UNIT-ON command (Pins 12-6) must be connected implicitly.
ATTENTION! If the unit is switched off or mains fails possibly existing output voltages or
currents will not be displayed on the monitor terminals.
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File: MCA Rev_3 Englisch.docx Rev 3 13 von 16
Versions of analog Programming
Plug connection
View of solder side Plug
All voltages and currents are
specified in DC
Standard
Non-isolated
600V potential free
2kV potential free
ANALOGE PROGRAMMIERUNG STANDARD
Isolation maximal 30V against ground (see catalog „Options and Modification)“
Isolation of the digital Inputs
0V
600 V
2000V
Isolation of the digital Outputs
0V
600 V
2000V
Isolation of the analog
In and Outputs
0V
600 V
2000V
Pin No.
Description
Type
Function
Function
Function
1
CC
DA
Supplies appr. +15V if power supply is in constant current mode.
Equivalent to LED CC on front panel.
2
CV
DA
Supplies appr. +15V if power supply is in constant voltage mode.
Equivalent to LED CV on front panel.
3
I-MON
AA
Actual output current monitor signal 0..+10V represents 0..nominal current
Ri ca. 10kΩ
Ri ca. 2kΩ
Ri ca. 11kΩ
4
VPS
AA
Slider Voltage Pot on
front panel
0..+10V for 0..nom.
Voltage
Ri ca. 10kΩ
Not used
Not used
5
IPS
AA
Slider Current Pot on
front panel
0..+10V for 0..nom.
Voltage
Ri ca. 10kΩ
Not used
Not used
6
0VD
DE
Ground for digital signals, may be current loaded
7
POL-SET
(option)
DE
For device of MCA series without function
8
V-SET
AE
0...+10V controls 0...nominal voltage
Input resistance to 0V appr. 10MOhm
9
0V
A-GND
Ground for analog signals, must not carry any current
10
+10VREF
AA
+10V Reference
11
V-MON
AA
Actual output voltage monitor signal.0...+10V represents 0...nom. voltage
Ri ca. 10kΩ
Ri ca. 2kΩ
Ri ca. 11kΩ
12
UNIT ON
DE
A connection to Pin 6 (OVD) releases the output voltage
Same function as switch OUTPUT on front panel.
13
POL-Status
(option)
DA
For device of MCA series without function
14
+NC
Not connected
15
I-SET
AE
0..+10V controls 0..nominal current
Input Resistance to 0V appr. 10MOhm
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File: MCA Rev_3 Englisch.docx Rev 3 14 von 16
6.2 Digital Interface PROBUS V (Option)
The flexible Interface System Probus V consists of two parts, that communicate over a
fiber optic connection.
Unit ADDAT30 (short “ADDA”) is an AD/DA interface that controls the power
supply. ADDA is connected to an interface converter via fiber optics. ADDA is
located as a plug on module on the power supply electronics. It is accessible
after opening the left side panel of the housing.
The interface converter that connects ADDA to different bus-systems, is
located at the back panel of the power supply.
It can also be operated outside the power supply. In that case, the outside
connection is fiber optic and therefore, a maximum of EMC ruggedness can
be achieved.
At the moment, interface converters are available for the following bus-systems:
USB
IEEE-488
LAN (Ethernet)
RS232
RS422
RS485
Profibus
CANopen
Analog 0..10V
Features (short form) “Probus V” provides commands to set output voltage, output current and to switch the
output voltage.
Set values can be ramped with defined speed.
High resolution read back of actual values.
Programming speed Up to 2000 set values per second possible. (depending on the interface converter)
Select Digital Interface Set switch (4) to REMOTE.
If the power supply is additionally equipped with an “analog programming” option, set
also switch (5) to DIGITAL.
LED DIGITAL (8) indicates digital programming selected
Status indication LED BUSY (9) flashes on data traffic.
Voltage limitaion The voltage set value limitation is always active. Adjustable with Potentiometer V-
LIMIT (17) on the front panel.
Further Information A detailed description of the Probus V system (command set, driver installation etc.) is
provided in separate manuals that come along with Probus V.
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7. Technical Data
All here stated data are valid for voltage and current control in internal operation.
Changes of the technical data with the options analog and digital programming see corresponding sections.
AC - Input 230V ±10% 47 - 63 Hz or 400V ±10% 3phasig 47 - 63 Hz, depending on
the type, see type label. Overvoltage category II according to IEC664.
N-connection and PE (non fused earth) always necessary!
For devices with high leakage current required PEN
At plug-type connections: performance according to
- IEC 60320-C14 until 700W
- IEC 60320-C19 700W until 1400W
- Cable connect (Three Phase Current)
EMC Standards See Certificate of Conformity.
Safety See Certificate of Conformity.
Environment Conditions Operating room: Only for indoor usage (see section 2.1.)
Temperature: 0 °C to 40 °C
Air humidity: Max. relative humidity 80% until 31 ºC,
linear decreasing until 50% relative humidity at 40 ºC
Atm press: Altitude max. 2000 m over sea level
Contamination: 1
Protection Class IP20
Output Voltage / Current See front panel of the power supply.
Power Limitation Depending on type, the output power is limited to 750W / 1500W or 3000W.
Output Polarity Up to 1500V nominal voltage it is floating (each output terminal may get earthed)
At 3000V nominal voltage it is positive or negative (see indication on the front panel).
The „0V“ terminal is intern fix connected to earth.
Output Isolation At units up to 400V nominal voltage each output terminal may get max. ±500V,
at 750V max ± 1000V and at 1500V max. ±2000V with respect to earth.
Attention ! Not valid for units with "analog programming", see section 6.1.1
Setting Range Voltage With Potentiometer VOLTAGE appr. 0,1% to 100% from nominal value
Current With Potentiometer CURRENT appr. 0,1% to 100% from nominal value
Reproducibility ±1x10-3 from nominal value,
Setting Resolution With potentiometer on the front panel 1x10-4 from nominal value
Residual Ripple <2x10-4 pp +200mVpp from nominal value
Deviation <±1x10-5 from nominal value, for ±10% mains voltage variation
<5x10-4 from nominal value, for 0 to 100% load variation
<±2x10-4 from nominal value, over 8 hours
<±1x10-4/K from nominal value
Recovery Time
voltage control <1ms for load variations from 10% to 100% or 100% to 10%
current control <10ms for load variations causing an output voltage variation less than 10% of the
nominal voltage.
Discharging Time Constant at unloaded output max. 10 sec
Programming speed: <300ms for changes of output voltage from 10% to 90% resp. 90% to 10%
Volage and Current Display DVM for voltage and current, extent ±20000 Digits
Status Display LEDs for constant voltage, constant current, set value limitation active, setting of
programming switch, Output ON, overtemperature, power limitation
Mechanical size Depending on type, changes reserved.
MCA -Serie FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen
File: MCA Rev_3 Englisch.docx Rev 3 16 von 16
8. Calibration
Certificate of Calibration All guaranteed data for our power supplies are tested in the factory and documented
in an internal test protocol. Furthermore we offer within the scope of our
ISO 9001 : 2008 certified quality system a calibration in our plant. The customer
receives a certificate of calibration. We certify the output data and the compliance with
our catalog data.
The blue calibration sticker refers to the next recommended date of calibration.
Subsequent Calibration Generally we recommend an annual subsequent calibration.
9. Certificate of Conformity
The power supplies carry the CE-sign. Please read the Certificate of Conformity.
10. Accessories
Connectors, Cables See enclosed Mounting Instructions
Mounting instructions
Rack Adapter Attention! Before opening the power supply, disconnect from mains!
The front panel handles must be exchanged separately. (Please don’t exchange
together, because the front panel would not be fixed).
Is the power supply only be used as plug-in unit, the stands may be removed.
For that remove the bottom sheet. The stands can be removed by using a screwdriver
for recessed-head screws. Then place back the bottom sheet.
Caution!! After removing the stands, the power supply may not longer be used as a table-top
unit, because no convection cooling is possible, risk for overheating.
11. Warranty, Repairs
Your power supply has been assembled and tested under stringent quality assurance
procedures.
We provide a 2 years warranty, commencing with the delivery date stated in the
serial number.
This warranty does not cover misuse or attempted repair by untrained personnel.
Enclosed you will find one set of circuit diagrams for service purposes.
In all further enquiries for service or spare parts, please provide both the model and
serial number of the unit
12. Special Models, Modifications
Power Supplies that are equipped with special modifications are identified with "MOD"
within the type designator (i.e. MCA 750 – 1500 MOD) on the label at the rear panel .
Please refer to the separate data sheet attached.
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