FuG Elektronik MCA Series, MCA 750, MCA 3000 Operating Instructions Manual

FuG Elektronik GmbH Am Eschengrund 11 D-83135 Schechen
Tel.: [phone] Fax: [phone] [e-mail] 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

MCA -Serie FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen

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

MCA -Serie FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen

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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

MCA -Serie FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen

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.