MR ECOTAP VPD 3 30D-24 User manual

On-load tap-changer with motor-drive unit
ECOTAP® VPD® III 30D-24 / MD&C
Operating Instructions
8209941/00 EN

© All rights reserved by Maschinenfabrik Reinhausen
Dissemination and reproduction of this document and use and disclosure of its content are strictly prohibited
unless expressly permitted.
Infringements will result in liability for compensation. All rights reserved in the event of the granting of patents,
utility models or designs.
The product may have been altered since this document was published.
We reserve the right to change the technical data, design and scope of supply.
Generally the information provided and agreements made when processing the individual quotations and orders
are binding.
The original operating instructions were written in German.

Table of contents
Maschinenfabrik Reinhausen GmbH 2021 38209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
Table of contents
1 Introduction......................................................................................................................... 7
1.1 Manufacturer....................................................................................................................................... 7
1.2 Completeness..................................................................................................................................... 7
1.3 Safekeeping........................................................................................................................................ 7
1.4 Notation conventions .......................................................................................................................... 7
1.4.1 Hazard communication system .............................................................................................................................7
1.4.2 Information system................................................................................................................................................9
1.4.3 Instruction system .................................................................................................................................................9
1.4.4 Typographic conventions ....................................................................................................................................10
2 Safety................................................................................................................................. 11
2.1 Appropriate use ................................................................................................................................ 11
2.2 Inappropriate use.............................................................................................................................. 12
2.3 Fundamental safety instructions ....................................................................................................... 12
2.4 Personnel qualification...................................................................................................................... 14
2.5 Personal protective equipment ......................................................................................................... 15
3 Product description.......................................................................................................... 16
3.1 Scope of delivery .............................................................................................................................. 16
3.2 Function description.......................................................................................................................... 16
3.3 Operating modes .............................................................................................................................. 17
3.4 Design............................................................................................................................................... 19
3.5 Control unit operating concept.......................................................................................................... 20
4 Packaging, transport and storage .................................................................................. 22
4.1 Packaging ......................................................................................................................................... 22
4.1.1 Suitability.............................................................................................................................................................22
4.1.2 Markings..............................................................................................................................................................23
4.2 Transportation, receipt and handling of shipments........................................................................... 24
4.3 Storage of shipments........................................................................................................................ 25
4.4 Unpacking shipments and checking for transportation damages ..................................................... 26
5 Mounting ........................................................................................................................... 27
5.1 Fastening on-load tap-changer to transformer cover........................................................................ 27
5.2 Connecting tap winding and on-load tap-changer take-off lead ....................................................... 30

Table of contents
Maschinenfabrik Reinhausen GmbH 202148209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
5.3 Mounting motor-drive unit ................................................................................................................. 33
5.4 Connecting control unit at the transformer manufacturer's site ........................................................ 40
5.4.1 Cable recommendation .......................................................................................................................................41
5.4.2 Connecting motor-drive unit and voltage supply .................................................................................................41
5.5 Taking measurements ...................................................................................................................... 44
5.6 Drying the on-load tap-changer ........................................................................................................ 46
5.7 Filling transformer with oil ................................................................................................................. 48
6 Commissioning................................................................................................................. 49
6.1 Commissioning the on-load tap-changer at the transformer manufacturer's site ............................. 49
6.1.1 Performing trial tap-change operations ...............................................................................................................51
6.1.2 Tests on the transformer .....................................................................................................................................52
6.1.3 Resetting automatic adjustment..........................................................................................................................54
6.2 Transporting transformer to the operating site.................................................................................. 55
6.3 Commissioning transformer at operating site ................................................................................... 55
6.3.1 Checking the correct position of the on-load tap-changer and motor-drive unit..................................................56
6.3.2 Mounting the control unit on an even surface .....................................................................................................57
6.3.3 Connecting control unit at operating site.............................................................................................................57
6.3.4 Switching on power supply..................................................................................................................................63
6.3.5 Performing trial tap-change operations ...............................................................................................................64
6.3.6 Switching on medium voltage .............................................................................................................................65
6.3.7 Setting parameters..............................................................................................................................................66
6.3.8 Checking automatic voltage regulation ...............................................................................................................66
6.3.9 When operating with alternative insulating liquids: activating temperature blocking...........................................67
6.3.10 Switching on the low-voltage busbar...................................................................................................................67
7 Operation........................................................................................................................... 69
7.1 Monitoring on-load tap-changer........................................................................................................ 69
7.2 Selecting the operating mode ........................................................................................................... 70
7.3 Actuating on-load tap-changer using the emergency drive shaft...................................................... 71
7.4 Configuring the control unit............................................................................................................... 75
7.4.1 Regulation ...........................................................................................................................................................75
7.4.2 Voltage blocking (P4) ..........................................................................................................................................80
7.4.3 Blocking function (P5) .........................................................................................................................................81
7.4.4 Target position for loss of voltage (P6) ...............................................................................................................81
7.4.5 Number of operating positions (P7) ....................................................................................................................83
7.4.6 Regulating range (P8) .........................................................................................................................................84

Table of contents
Maschinenfabrik Reinhausen GmbH 2021 58209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
7.4.7 Remote behavior (P9) .........................................................................................................................................85
7.4.8 Password protection (P10)..................................................................................................................................85
7.4.9 Adjustment (F1)...................................................................................................................................................87
7.4.10 Reading remaining life (F2).................................................................................................................................89
7.4.11 LED function test (F3) .........................................................................................................................................90
7.4.12 Software update (F4) ..........................................................................................................................................91
7.4.13 Invert travel commands (F5) ...............................................................................................................................91
7.4.14 Read out software version (F6)...........................................................................................................................92
7.4.15 Customer message for event messages E1 and E2 (F7) ...................................................................................92
7.4.16 Reset to factory setting (F8)................................................................................................................................93
7.4.17 Display control parameters (F9)..........................................................................................................................94
7.4.18 Displaying event memory (E) ..............................................................................................................................94
8 Control system protocol .................................................................................................. 96
8.1 Modbus RTU Parameters ................................................................................................................. 96
8.2 Function codes ................................................................................................................................. 96
8.3 Data format ....................................................................................................................................... 96
8.4 Data points (single inquiry) ............................................................................................................... 97
8.4.1 Coils ....................................................................................................................................................................97
8.4.2 Discrete Inputs ....................................................................................................................................................97
8.4.3 Input Register......................................................................................................................................................98
8.4.4 Holding register ...................................................................................................................................................99
8.5 Data points (collective inquiry)........................................................................................................ 100
9 Fault elimination ............................................................................................................. 103
9.1 General faults ................................................................................................................................. 103
9.2 Problem with automatic voltage regulation (AVR AUTO) ............................................................... 103
9.3 Other faults ..................................................................................................................................... 104
10 Maintenance.................................................................................................................... 105
10.1 Inspection ....................................................................................................................................... 105
10.1.1 Visual check ......................................................................................................................................................105
10.1.2 Checking the control unit...................................................................................................................................106
10.1.3 Read out software version (F6).........................................................................................................................106
10.1.4 Reading remaining life (F2)...............................................................................................................................106
10.1.5 LED function test (F3) .......................................................................................................................................107
10.1.6 Checking the temperature blocking...................................................................................................................108
10.1.7 Oil quality ..........................................................................................................................................................108

Table of contents
Maschinenfabrik Reinhausen GmbH 202168209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
10.2 Maintenance ................................................................................................................................... 109
10.3 Care ................................................................................................................................................ 109
11 Messages ........................................................................................................................ 110
11.1 LEDs ............................................................................................................................................... 110
11.2 Event messages ............................................................................................................................. 110
12 Overview of parameters................................................................................................. 112
13 Disposal........................................................................................................................... 114
14 Technical data................................................................................................................. 115
14.1 On-load tap-changer type designation............................................................................................ 115
14.1.1 ECOTAP®VPD on-load tap-changer designation............................................................................................115
14.1.2 Number of positions and basic connection .......................................................................................................115
14.2 Technical data for the on-load tap-changer .................................................................................... 116
14.3 Step capacity diagram .................................................................................................................... 117
14.4 Permitted voltage stresses ............................................................................................................. 118
14.5 Limit values for dielectric strength and water content of on-load tap-changer oil ........................... 121
14.6 Technical data of the control unit.................................................................................................... 121
14.7 Technical data for the motor-drive unit ........................................................................................... 122
15 Drawings ......................................................................................................................... 123
15.1 Information on the drawings in the appendix .................................................................................. 123
15.2 Dimensional drawings..................................................................................................................... 123
15.2.1 10157324 ..........................................................................................................................................................124
15.3 High-voltage connection diagrams ................................................................................................. 127
15.3.1 SBI_8049432 ....................................................................................................................................................128
15.3.2 SBI_8049434 ....................................................................................................................................................129
15.4 Dimensional diagram for control unit (10014680)........................................................................... 130

1 Introduction
Maschinenfabrik Reinhausen GmbH 2021 78209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
1 Introduction
This technical file contains detailed descriptions on the safe and proper in-
stallation, connection, commissioning and monitoring of the product.
It also includes safety instructions and general information about the prod-
uct.
This technical file is intended solely for specially trained and authorized per-
sonnel.
1.1 Manufacturer
The product is manufactured by:
C.A.P.T. srl
Via Postale Vecchia, 17- Trissino
36070 (VI) Italy
Tel. [phone]
E-mail: [email protected]
Further information on the product and copies of this technical file are avail-
able from this address if required.
1.2 Completeness
This technical file is incomplete without the supporting documents.
The following documents are considered supporting documents:
▪ Connection diagrams
▪ Routine test report
Also observe generally valid legislation, standards, and guidelines as well as
specifications on accident prevention and environmental protection in the re-
spective country of use.
1.3 Safekeeping
Keep this technical file and all supporting documents ready at hand and ac-
cessible for future use at all times.
1.4 Notation conventions
1.4.1 Hazard communication system
Warnings in this technical file are displayed as follows.

1 Introduction
Maschinenfabrik Reinhausen GmbH 202188209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
1.4.1.1 Warning relating to section
Warnings relating to sections refer to entire chapters or sections, sub-sec-
tions or several paragraphs within this technical file. Warnings relating to
sections use the following format:
WARNING Type of danger!
Source of the danger and outcome.
► Action
► Action
1.4.1.2 Embedded warning information
Embedded warnings refer to a particular part within a section. These warn-
ings apply to smaller units of information than the warnings relating to sec-
tions. Embedded warnings use the following format:
DANGER! Instruction for avoiding a dangerous situation.
1.4.1.3 Signal words and pictograms
The following signal words are used:
Signal word Definition
DANGER Indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION Indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE Indicates measures to be taken to prevent damage to property.
Table1: Signal words in warning notices

1 Introduction
Maschinenfabrik Reinhausen GmbH 2021 98209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
Pictograms warn of dangers:
Pictogram Definition
Warning of a danger point
Warning of dangerous electrical voltage
Warning of combustible substances
Warning of danger of tipping
Warning of danger of crushing
Table2: Pictograms used in warning notices
1.4.2 Information system
Information is designed to simplify and improve understanding of particular
procedures. In this technical file it is laid out as follows:
Important information.
1.4.3 Instruction system
This technical file contains single-step and multi-step instructions.
Single-step instructions
Instructions which consist of only a single process step are structured as fol-
lows:

1 Introduction
Maschinenfabrik Reinhausen GmbH 202110 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
Aim of action
üRequirements (optional).
► Step 1 of 1.
ðResult of step (optional).
ðResult of action (optional).
Multi-step instructions
Instructions which consist of several process steps are structured as follows:
Aim of action
üRequirements (optional).
1. Step 1.
ðResult of step (optional).
2. Step 2.
ðResult of step (optional).
ðResult of action (optional).
1.4.4 Typographic conventions
The following typographic conventions are used in this technical file:
Typographic con-
vention
Purpose Example
UPPERCASE Operating controls, keys AVR MANUAL
Bold Displays/menus P21
Italics System messages/LED dis-
plays
ERROR LED
[► Page number]. Cross reference [► 41].
Table3: Typographic conventions

2 Safety
Maschinenfabrik Reinhausen GmbH 2021 118209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
2 Safety
▪ Read this technical file through to familiarize yourself with the product.
▪ This technical file is a part of the product.
▪ Read and observe the safety instructions provided in this chapter.
▪ Read and observe the warnings in this technical file in order to avoid func-
tion-related dangers.
▪ The product is manufactured on the basis of state-of-the-art technology.
Nevertheless, risks to life and limb for the user or impairment of the prod-
uct and other material assets due to the function may arise in the event of
improper use.
2.1 Appropriate use
The product is an on-load tap-changer with motor-drive unit and control unit
and adjusts the transmission ratio of transformers without interrupting the
load flow. The product is designed solely for use in electrical energy systems
and facilities. If used as intended and in compliance with the requirements
and conditions specified in this technical file as well as the warning notices in
this technical file and attached to the product, then the product does not
present any danger to people, property or the environment. This applies
throughout the service life of the product, from delivery, installation and oper-
ation to removal and disposal.
The following is considered intended use:
▪ Only use the ECOTAP®VPD® on-load tap-changer in systems set up in
accordance with IEC61936-1.
▪ You will find the standard valid for the product and the year of issue on the
nameplate.
▪ Only operate the product in accordance with this technical file and the
agreed delivery conditions and technical data.
▪ Only operate standard design on-load tap-changers in entirely oil-filled
transformers.
▪ Operation with alternative insulating fluids is possible in accordance with
the specification in the Technical data [►Section 14, Page 115]. In such
cases, you must ensure compliance with the limited temperature ranges
by means of temperature blocking [►Section 6.3.9, Page 67].
▪ The serial numbers of the on-load tap-changer and motor-drive unit must
match. Operating an on-load tap-changer and motor-drive unit with differ-
ing serial numbers is not permitted.
▪ Ensure that all necessary work is performed by qualified personnel only.
▪ Use the equipment and special tools supplied solely for the intended pur-
pose and in accordance with the specifications of this technical file.
Permitted electrical operating conditions
In addition to the design data in accordance with the order confirmation, ob-
serve the following limits for the through-current and the step voltage:

2 Safety
Maschinenfabrik Reinhausen GmbH 202112 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
In the standard version, the on-load tap-changer is designed for sinusoidal
50/60 Hz AC current with a curve form symmetrical to the zero axis and can
switch twice the rated through-current Ir at its rated step voltage Uir.
Exceeding the rated step voltage Uir for a short period by up to 10% is per-
mitted if the rated through-current Ir is not exceeded.
2.2 Inappropriate use
Use is considered inappropriate if the product is used in a way other than as
described in the "Appropriate use" section. In addition, observe the following:
Prohibited electrical operating conditions
All operating conditions that do not comply with the design data in accor-
dance with the order confirmation are prohibited.
Prohibited operating conditions may arise due to short circuits as well as due
to inrush current impulses when energizing transformers or other electrical
machines. This applies to the affected transformer itself just as it does to
transformers electrically connected in parallel or serially or other electrical
machines.
Higher voltages may occur due to transformer overexcitation following load
shedding, for example.
Operations outside of the permitted operating conditions can lead to injury to
persons and damage to the product.
▪ Prevent any such operations outside of the permitted operating conditions
by taking suitable measures.
2.3 Fundamental safety instructions
To prevent accidents, malfunctions and damage as well as unacceptable ad-
verse effects on the environment, those responsible for transport, installa-
tion, operation, maintenance and disposal of the product or parts of the prod-
uct must ensure the following:
Personal protective equipment
Loosely worn or unsuitable clothing increases the danger of becoming
trapped or caught up in rotating parts and the danger of getting caught on
protruding parts. This poses a danger to life and limb.
▪ Wear appropriate personal protective equipment such as a helmet, work
gloves, etc. for the respective activity.
▪ Never wear damaged personal protective equipment.
▪ Never wear rings, necklaces, or other jewelry.
▪ If you have long hair, wear a hairnet.

2 Safety
Maschinenfabrik Reinhausen GmbH 2021 138209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
Work area
Untidy and poorly lit work areas can lead to accidents.
▪ Keep the work area clean and tidy.
▪ Make sure that the work area is well lit.
▪ Observe the applicable laws for accident prevention in the relevant coun-
try.
Working during operation
The product may only be operated in a sound, operational condition. Other-
wise it poses a danger to life and limb.
▪ Regularly check the operational reliability of safety equipment.
▪ Comply with the inspection work, maintenance work and maintenance in-
tervals described in this technical file.
Working with current transformers
Dangerous high voltages may occur when a current transformer is operated
with an open secondary circuit. This can lead to injuries and property dam-
age.
▪ Never operate a current transformer with an open secondary circuit; short-
circuit the current transformer to prevent this.
▪ Observe the information in the current transformer operating instructions.
Explosion protection
Highly flammable or explosive gases, vapors and dusts can cause serious
explosions and fire.
▪ Do not install or operate the product in areas where a risk of explosion is
present.
Safety markings
Warning signs and safety information plates are safety markings on the
product. They are an important aspect of the safety concept.
▪ Observe all safety markings on the product.
▪ Make sure all safety markings on the product remain intact and legible.
▪ Replace safety markings that are damaged or missing.
Ambient conditions
To ensure reliable and safe operation, the product must only be operated
under the ambient conditions specified in the technical data.
▪ Observe the specified operating conditions and requirements for the in-
stallation location.

2 Safety
Maschinenfabrik Reinhausen GmbH 202114 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
Modifications and conversions
Unauthorized or inappropriate changes to the product may lead to personal
injury, material damage and operational faults.
▪ Only modify the product after consultation with Maschinenfabrik Rein-
hausen GmbH.
Spare parts
Spare parts not approved by Maschinenfabrik Reinhausen GmbH may lead
to physical injury, damage to the product and malfunctions.
▪ Only use spare parts that have been approved by Maschinenfabrik Rein-
hausen GmbH.
▪ Contact Maschinenfabrik Reinhausen GmbH.
2.4 Personnel qualification
The person responsible for assembly, commissioning, operation, mainte-
nance and inspection must ensure that the personnel are sufficiently quali-
fied.
Electrically skilled person
The electrically skilled person has a technical qualification and therefore has
the required knowledge and experience, and is also conversant with the ap-
plicable standards and regulations. The electrically skilled person is also pro-
ficient in the following:
▪ Can identify potential dangers independently and is able to avoid them.
▪ Is able to perform work on electrical systems.
▪ Is specially trained for the working environment in which (s)he works.
▪ Must satisfy the requirements of the applicable statutory regulations for
accident prevention.
Electrically trained persons
An electrically trained person receives instruction and guidance from an
electrically skilled person in relation to the tasks undertaken and the poten-
tial dangers in the event of inappropriate handling as well as the protective
devices and safety measures. The electrically trained person works exclu-
sively under the guidance and supervision of an electrically skilled person.
Operator
The operator uses and operates the product in line with this technical file.
The operating company provides the operator with instruction and training
on the specific tasks and the associated potential dangers arising from im-
proper handling.

2 Safety
Maschinenfabrik Reinhausen GmbH 2021 158209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
Technical Service
We strongly recommend having maintenance, repairs and retrofitting carried
out by our Technical Service department. This ensures that all work is per-
formed correctly. If maintenance is not carried out by our Technical Service
department, please ensure that the personnel who carry out the mainte-
nance are trained and authorized by Maschinenfabrik Reinhausen GmbH to
carry out the work.
Authorized personnel
Authorized personnel are trained by Maschinenfabrik Reinhausen GmbH to
carry out special maintenance.
2.5 Personal protective equipment
Personal protective equipment must be worn during work to minimize risks to
health.
▪ Always wear the personal protective equipment required for the job at
hand.
▪ Never wear damaged personal protective equipment.
▪ Observe information about personal protective equipment provided in the
work area.
Protective clothing Close-fitting work clothing with a low tearing strength,
with tight sleeves and with no protruding parts. It mainly
serves to protect the wearer against being caught by
moving machine parts.
Safety shoes To protect against falling heavy objects and slipping on
slippery surfaces.
Safety glasses To protect the eyes from flying parts and splashing liq-
uids.
Visor To protect the face from flying parts and splashing liq-
uids or other dangerous substances.
Hard hat To protect against falling and flying parts and materials.
Hearing protection To protect against hearing damage.
Protective gloves To protect against mechanical, thermal, and electrical
hazards.
Table4: Personal protective equipment

3 Product description
Maschinenfabrik Reinhausen GmbH 202116 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
3 Product description
3.1 Scope of delivery
The product is packaged with protection against moisture and is delivered as
follows:
▪ On-load tap-changer
▪ Motor-drive unit with connection cable
▪ Control unit (TDSC function optional)
▪ O-ring
▪ Additional seal
▪ Fixing screws with locking washers
▪ Technical documents
Note the following information:
▪ Check the shipment for completeness on the basis of the shipping docu-
ments.
▪ Store the parts in a dry place until installation
▪ The product must remain in its airtight, protective wrapping and may only
be removed immediately before installation
You will find more information in the "Packaging, transport, and stor-
age" [►Section 4, Page 22] chapter.
3.2 Function description
On-load tap-changer
On-load tap-changers are used to adjust the desired tap of a tap winding un-
der load.
The on-load tap-changer is based on the high-speed resistor-type tap-
changer principle and uses vacuum cells to change the tap position under
load. In this process, the arc is extinguished while isolated in a vacuum cell,
preventing contaminants from entering the oil.
Motor-drive unit
The motor-drive unit adjusts the operating position of on-load tap-changers
in regulating transformers to the individual operating requirements. The tap-
change operation is initiated by activating the motor-drive unit (a single con-
trol impulse is triggered). This adjustment operation is always completed re-
gardless of any other control impulses issued during the tap-change opera-
tion. In the standard design, the next tap-change operation can only proceed
once all control devices have reached their resting positions.

3 Product description
Maschinenfabrik Reinhausen GmbH 2021 178209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
Control unit
The motor-drive unit is equipped with a control unit which enables automatic
voltage regulation. This is used to keep the output voltage of a transformer
with an on-load tap-changer constant. The control unit compares the trans-
former's measured voltage (Uactual) with a defined reference voltage (Udesired).
The difference between Uactual and Udesired is the control deviation dU. If the
control deviation dU is greater than the set bandwidth, the control unit trig-
gers a tap-change operation after the delay time T1 has elapsed in order to
reduce the control deviation.
You can set all parameters needed to set the voltage regulation via a param-
eterization menu.
OLTC PreCheck
Before each tap-change operation, the motor-drive unit checks whether the
drive train of the on-load tap-changer is tight or whether one or more micro-
switches have failed. In the event of a micro-switch defect, the device
switches to fault mode and issues an error message.
Exception: In the EXTERNAL CONTROL operating mode, the device per-
forms an automatic OLTC-PreCheck once every 24hours, not before each
tap-change operation.
Behavior in the event of a voltage interruption
Should a voltage interruption occur during a tap-change operation, the mo-
tor-drive unit completes the tap-change operation that has already started.
Open both relay contacts on X5 and the device will block further on-load tap-
change operations until the voltage supply is restored. You can adapt this re-
sponse using the "Target position for loss of voltage" [►Section 7.4.4, Page
81] function so that the on-load tap-changer is changed to a defined tap po-
sition before this blocking. For this purpose, the control unit is equipped with
an energy accumulator. If it is ready to work, this is indicated by the LED
staying lit. After a loss of voltage or a deliberate disconnection from the
mains, it takes around 30minutes for this energy accumulator to discharge.
3.3 Operating modes
The control ensures that the required cooling time of approx. 3seconds is
maintained after each on-load tap-change operation. During this time, the
control will not accept any tap-change commands. An exception to this is
the optional multi-tap-change function, which is only possible in the operat-
ing mode EXTERNAL CONTROL.
There are 3 operating modes on the control unit for controlling the on-load
tap-changer.

3 Product description
Maschinenfabrik Reinhausen GmbH 202118 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
AVR MANUAL manual mode
In AVR MANUAL manual mode, there is no automatic control. The motor-
drive unit can be controlled using the device's operating panel ( = in-
crease voltage, = reduce voltage). The device settings can be changed.
AVR AUTO auto mode
In auto mode, the device automatically regulates the voltage in accordance
with the set parameters. The voltage is measured in a single phase via the
supply voltage. You have to switch to AVR MANUAL manual mode to config-
ure the control unit.
Control via EXTERNALCONTROL
In the EXTERNAL CONTROL operating mode, the commands of an external
control unit (e.g. ECOTAP® VPD® CONTROL PRO) are executed. In this
case, manual operation using the RAISE and LOWER keys is not possible.
When operating in this mode, observe the safety instructions and the de-
scription in the external control unit operating instructions.

3 Product description
Maschinenfabrik Reinhausen GmbH 2021 198209941/00 EN ECOTAP® VPD® III 30D-24 / MD&C
3.4 Design
You will find a detailed drawing of the on-load tap-changer in the "Drawings"
section.
Figure1: Front view
1 Motor-drive unit 2 Nameplate
3 Sealing module 4 Additional seal
5 Connection contacts 6 O-ring

3 Product description
Maschinenfabrik Reinhausen GmbH 202120 8209941/00 ENECOTAP® VPD® III 30D-24 / MD&C
Figure2: Control unit and motor-drive unit
1 Motor-drive unit 2 Connection cable
3 Control unit
3.5 Control unit operating concept
You can operate the device using the operating controls on the front panel.
Key Function
MENU Call up or closing the parameterization menu
AVR AUTO Activate automatic voltage regulation
RAISE In AVR MANUAL operating mode:
Raise tap-change operation
In parameterization menu:
Increase displayed value
+ RAISE +
AVR AUTO
In parameterization menu:
Increase displayed value quickly
LOWER In AVR MANUAL operating mode:
Lower tap-change operation
In parameterization menu:
Decrease displayed value
+ LOWER +
AVR AUTO
In parameterization menu:
Decrease displayed value quickly