MR VACUTAP VR Installation and operation manual

On-Load Tap-Changer
VACUTAP® VR®
Installation and Commissioning Instructions
4349315/00 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 2015 34349315/00 EN VACUTAP® VR®
Table of contents
1Introduction....................................................................................................................... 10
1.1 Validity............................................................................................................................................... 10
1.2 Manufacturer..................................................................................................................................... 10
1.3 Subject to change without notice....................................................................................................... 10
1.4 Completeness.................................................................................................................................... 10
1.5 Supporting documents....................................................................................................................... 11
1.6 Safekeeping....................................................................................................................................... 11
1.7 Notation conventions......................................................................................................................... 11
1.7.1 Symbols............................................................................................................................................................... 11
1.7.2 Hazard communication system........................................................................................................................... 12
1.7.3 Information system.............................................................................................................................................. 14
2Safety................................................................................................................................. 15
2.1 General safety information................................................................................................................ 15
2.2 Appropriate use................................................................................................................................. 15
2.3 Inappropriate use............................................................................................................................... 16
2.4 Personnel qualification...................................................................................................................... 16
2.5 Operator's duty of care...................................................................................................................... 17
2.6 Personal protective equipment.......................................................................................................... 17
2.7 Protective devices............................................................................................................................. 18
2.7.1 Protective relay RS.............................................................................................................................................. 19
2.7.2 Pressure monitoring device................................................................................................................................. 19
2.7.3 Rupture disk ....................................................................................................................................................... 19
2.7.4 Pressure relief device MPreC®........................................................................................................................... 19
2.7.5 Tap-change supervisory control.......................................................................................................................... 19
2.7.6 Temperature monitoring...................................................................................................................................... 19
2.7.7 Protective devices in the motor-drive unit........................................................................................................... 20
3Product description.......................................................................................................... 21
3.1 Scope of delivery............................................................................................................................... 21
3.2 On-load tap-changer.......................................................................................................................... 21
3.2.1 Function description............................................................................................................................................ 21
3.2.2 Performance features.......................................................................................................................................... 22
3.2.3 Setup/models...................................................................................................................................................... 23
3.2.4 Name plate.......................................................................................................................................................... 27

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3.3 Drive shaft......................................................................................................................................... 27
3.3.1 Function description............................................................................................................................................ 27
3.3.2 Performance features.......................................................................................................................................... 27
3.3.3 Setup/models of drive shaft................................................................................................................................. 27
3.4 RS protective relay............................................................................................................................ 29
3.4.1 Function description............................................................................................................................................ 30
3.4.2 Performance features.......................................................................................................................................... 30
3.4.3 Setup/models of protective relay......................................................................................................................... 31
3.5 Pressure monitoring device DW........................................................................................................ 32
3.5.1 Function description............................................................................................................................................ 32
3.5.2 Performance features.......................................................................................................................................... 33
3.5.3 Structure/versions of the pressure-operated relay.............................................................................................. 33
4Packaging, transport and storage................................................................................... 36
4.1 Packaging.......................................................................................................................................... 36
4.1.1 Suitability............................................................................................................................................................. 36
4.1.2 Markings.............................................................................................................................................................. 36
4.2 Transportation, receipt and handling of shipments............................................................................ 37
4.3 Storage of shipments......................................................................................................................... 38
4.4 Unpacking shipments and checking for transportation damages...................................................... 39
5Assembly: Standard design............................................................................................. 40
5.1 Preparatory work............................................................................................................................... 40
5.1.1 Fitting mounting flange on transformer cover...................................................................................................... 40
5.1.2 Fitting stud bolts on mounting flange................................................................................................................... 41
5.2 Fastening on-load tap-changer to transformer cover........................................................................ 41
5.2.1 Fastening oil compartment of the on-load tap-changer on transformer cover..................................................... 41
5.2.2 Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE............................................... 46
5.2.3 Securing tap selector on oil compartment of the on-load tap-changer VRD/VRF............................................... 47
5.2.4 Securing tap selector on oil compartment of the on-load tap-changer VRG....................................................... 50
5.2.5 Connecting tap selector take-off leads................................................................................................................ 52
5.3 Connecting tap winding and on-load tap-changer take-off lead........................................................ 52
5.3.1 Tap selector connection contacts VRC/VRE....................................................................................................... 52
5.3.2 Tap selector connection contacts for multiple coarse change-over selector VRC.............................................. 54
5.3.3 Change-over selector connection contacts for reversing change-over selector connection VRC/VRE.............. 54
5.3.4 Change-over selector connection contacts for coarse tap selector connection VRC/VRE................................. 56
5.3.5 Selector connection contacts VRD/VRF.............................................................................................................. 57

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5.3.6 Change-over selector connection contacts for reversing change-over selector connection VRD/VRF.............. 58
5.3.7 Change-over selector connection contacts for coarse tap selector connection VRD/VRF................................. 58
5.3.8 Parallel bridges for VRF I 1601........................................................................................................................... 58
5.3.9 Fine-tap-selector and change-over-selector connection contacts VRG.............................................................. 59
5.3.10 Parallel bridges for VRG I 1601........................................................................................................................... 60
5.3.11 Connecting on-load tap-changer take-off lead.................................................................................................... 60
5.4 Carrying out the transformer ratio test............................................................................................... 60
5.4.1 Carrying out transformer ratio test with TAPMOTION® TD test drive................................................................. 61
5.4.2 Carrying out the transformer ratio test manually................................................................................................. 61
5.5 Measuring DC resistance on transformer.......................................................................................... 63
5.6 Drying on-load tap-changer in autoclave........................................................................................... 64
5.6.1 Vacuum-drying in the autoclave.......................................................................................................................... 64
5.6.2 Vapor-phase drying in the autoclave................................................................................................................... 65
5.7 Drying on-load tap-changer in transformer tank................................................................................ 66
5.7.1 Vacuum-drying in the transformer tank............................................................................................................... 66
5.7.2 Vapor-phase drying in the transformer tank........................................................................................................ 67
6Assembly: Bell-type tank design..................................................................................... 90
6.1 Preparatory work............................................................................................................................... 90
6.1.1 Fitting mounting flange on transformer cover...................................................................................................... 90
6.1.2 Fitting stud bolts on mounting flange................................................................................................................... 91
6.2 Inserting on-load tap-changer into supporting structure.................................................................... 91
6.2.1 Securing tap selector on oil compartment of the on-load tap-changer VRC/VRE............................................... 91
6.2.2 Securing tap selector on oil compartment of the on-load tap-changer VRD/VRF............................................... 94
6.2.3 Securing tap selector on oil compartment of the on-load tap-changer VRG....................................................... 96
6.2.4 Connecting tap selector take-off leads................................................................................................................ 99
6.2.5 Inserting on-load tap-changer into supporting structure.................................................................................... 100
6.3 Connecting tap winding and on-load tap-changer take-off lead...................................................... 101
6.3.1 Tap selector connection contacts VRC/VRE..................................................................................................... 101
6.3.2 Tap selector connection contacts for multiple coarse change-over selector VRC............................................ 102
6.3.3 Change-over selector connection contacts for reversing change-over selector connection VRC/VRE............ 103
6.3.4 Change-over selector connection contacts for coarse tap selector connection VRC/VRE............................... 105
6.3.5 Selector connection contacts VRD/VRF............................................................................................................ 106
6.3.6 Change-over selector connection contacts for reversing change-over selector connection VRD/VRF............ 107
6.3.7 Change-over selector connection contacts for coarse tap selector connection VRD/VRF............................... 107
6.3.8 Parallel bridges for VRF I 1601......................................................................................................................... 107
6.3.9 Fine-tap-selector and change-over-selector connection contacts VRG............................................................ 108

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6.3.10 Parallel bridges for VRG I 1601......................................................................................................................... 109
6.3.11 Connecting on-load tap-changer take-off lead.................................................................................................. 109
6.4 Carrying out the transformer ratio test............................................................................................. 109
6.4.1 Carrying out transformer ratio test with TAPMOTION® TD test drive............................................................... 110
6.4.2 Carrying out the transformer ratio test manually............................................................................................... 110
6.5 Measuring DC resistance on transformer........................................................................................ 112
6.6 Drying on-load tap-changer in autoclave......................................................................................... 113
6.6.1 Vacuum-drying in the autoclave........................................................................................................................ 113
6.6.2 Vapor-phase drying in the autoclave................................................................................................................. 114
6.7 Removing on-load tap-changer head.............................................................................................. 115
6.7.1 Removing on-load tap-changer head cover...................................................................................................... 115
6.7.2 Removing tap position indicator (version without multiple coarse change-over selector)................................. 117
6.7.3 Removing tap position indicator from multiple coarse change-over selector with more than 35 operating
positions............................................................................................................................................................ 117
6.7.4 Removing tap-change supervisory control (if present)...................................................................................... 119
6.7.5 Removing the oil suction pipe........................................................................................................................... 121
6.7.6 Removing the oil suction pipe........................................................................................................................... 121
6.7.7 Lifting on-load tap-changer head off supporting flange..................................................................................... 123
6.8 Attaching bell-type tank and connecting on-load tap-changer head with on-load tap-changer....... 124
6.8.1 Mounting the bell-type tank............................................................................................................................... 124
6.8.2 Mounting on-load tap-changer head on bell-type tank...................................................................................... 126
6.8.3 Connecting on-load tap-changer head and on-load tap-changer ..................................................................... 127
6.8.4 Inserting oil suction pipe.................................................................................................................................... 130
6.8.5 Inserting tap-change supervisory control (if present)........................................................................................ 131
6.8.6 Inserting the tap position indicator without multiple coarse change-over selector............................................ 133
6.8.7 Inserting tap position indicator with multiple coarse change-over selector with more than 35 operating positions
.......................................................................................................................................................................... 134
6.8.8 Securing on-load tap-changer head cover........................................................................................................ 135
6.9 Drying on-load tap-changer in transformer tank.............................................................................. 136
6.9.1 Vacuum-drying in the transformer tank............................................................................................................. 137
6.9.2 Vapor-phase drying in the transformer tank...................................................................................................... 137
7Filling the oil compartment of the on-load tap-changer with oil................................ 160
8Fitting protective devices and drive components....................................................... 162
8.1 Connecting tap-change supervisory control (if present).................................................................. 162
8.2 Installing protective relay in piping and connecting......................................................................... 162
8.2.1 Checking function of protective relay................................................................................................................ 163

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8.2.2 Installing protective relay in piping.................................................................................................................... 165
8.2.3 Installing electrics for protective relay............................................................................................................... 168
8.3 Installing and connecting the pressure-operated relay.................................................................... 174
8.3.1 Checking the function of the pressure-operated relay....................................................................................... 174
8.3.2 Installing the pressure-operated relay............................................................................................................... 176
8.3.3 Making the electrical connections for the pressure-operated relay................................................................... 177
8.4 Fitting motor-drive unit on transformer............................................................................................ 178
8.5 Fitting bevel gear............................................................................................................................. 180
8.6 Fitting drive shaft............................................................................................................................. 180
8.6.1 Fitting vertical drive shaft................................................................................................................................... 182
8.6.2 Fitting horizontal drive shaft.............................................................................................................................. 189
8.6.3 Fitting drive shaft with cardan joints.................................................................................................................. 194
8.6.4 Fitting drive shaft with insulator......................................................................................................................... 207
8.7 Centering on-load tap-changer and motor-drive unit....................................................................... 208
8.8 Installing electrics for motor-drive unit............................................................................................. 208
9Commissioning of on-load tap-changer by transformer manufacturer..................... 209
9.1 Bleeding on-load tap-changer head and suction pipe..................................................................... 209
9.1.1 Bleeding on-load tap-changer head.................................................................................................................. 209
9.1.2 Bleeding suction pipe on pipe connection S...................................................................................................... 210
9.2 Grounding the on-load tap-changer................................................................................................. 210
9.3 Performing tests on motor-drive unit............................................................................................... 211
9.3.1 Performing function tests................................................................................................................................... 211
9.3.2 Dielectric tests on transformer wiring................................................................................................................ 211
9.4 Performing trial tap-change operations........................................................................................... 211
9.5 High-voltage tests on the transformer............................................................................................. 212
10 Transporting transformer to the operating site........................................................... 214
10.1 Transport with removed drive.......................................................................................................... 214
10.2 Transport with oil fill and without oil conservator............................................................................. 214
10.3 Transport without oil fill.................................................................................................................... 215
10.3.1 Emptying oil compartment via pipe connection S.............................................................................................. 216
11 Commissioning transformer at installation site........................................................... 217
11.1 Checking motor-drive unit................................................................................................................ 217
11.2 Checking protective relay................................................................................................................ 218
11.2.1 Checking protective relay (RS 2001, 2001/V, 2001/H, 2001/E, 2001/5, 2001/R, 2003).................................... 218

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11.2.2 Checking protective relay (RS 2004)................................................................................................................. 218
11.3 Checking pressure monitoring device............................................................................................. 219
11.4 Filling the oil compartment of the on-load tap-changer with oil....................................................... 219
11.5 Commissioning the transformer....................................................................................................... 221
12 Fault elimination.............................................................................................................. 223
12.1 Tripping of the protective relay and re-commissioning the transformer........................................... 225
12.1.1 Flap valve in IN SERVICE position................................................................................................................... 225
12.1.2 Flap valve in OFF position................................................................................................................................. 225
12.1.3 Re-commissioning the transformer................................................................................................................... 226
12.2 Tripping the pressure-operated relay and putting the transformer back into operation................... 226
12.2.1 Sensor in the OPERATION position.................................................................................................................. 227
12.2.2 Sensor in the OFF position................................................................................................................................ 227
12.2.3 Re-commissioning the transformer................................................................................................................... 227
13 Technical data................................................................................................................. 228
13.1 Technical data for protective relay................................................................................................... 228
13.2 Special models of protective relay................................................................................................... 229
13.2.1 Protective relay with CO change-over contact as tripping switch ..................................................................... 229
13.2.2 Protective relay with several dry-reed magnetic switches................................................................................. 229
13.3 Technical data for pressure monitoring device................................................................................ 230
14 Appendix.......................................................................................................................... 231
14.1 Limit values for dielectric strength and water content of on-load tap-changer oil............................ 231
14.2 VACUTAP® VRC/VRE, installation drawing (899992).................................................................... 232
14.3 VACUTAP® VRD/VRF, installation drawing (899898).................................................................... 233
14.4 VACUTAP® VRG, installation drawing (899945)............................................................................ 234
14.5 VACUTAP® VRC/VRE, installation position of selector connection contacts (727042).................. 235
14.6 VACUTAP® VRD/VRF/VRG, fine tap selector connection contact and change-over selector
connection contact (899941)........................................................................................................... 236
14.7 VACUTAP® VRF, bridges to parallel connection of tap selector connection contacts (786919).... 237
14.8 VACUTAP® VRG, bridges to parallel connection of tap selector connection contacts (786920).... 238
14.9 VACUTAP® VR, special design for bell-type tank installation (720781)......................................... 239
14.10 VACUTAP® VR, lifting device for bell-type tank installation (720845)............................................ 240
14.11 VACUTAP® VR, on-load tap-changer head (720847).................................................................... 241
14.12 VACUTAP® VR, on-load tap-changer head with flange for pressure relief device (899946).......... 242
14.13 VACUTAP® VR, pipe connection Q with connecting terminals of tap-change supervisory control
(899648).......................................................................................................................................... 243

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14.14 VACUTAP® VR, adjustment positions (728557)............................................................................. 244
14.15 VACUTAP® VRC/VRE, adjustment plan without change-over selector (719853).......................... 245
14.16 VACUTAP® VRD/VRF, adjustment plan without change-over selector (721089).......................... 247
14.17 VACUTAP® VRC III/VRC II/VRE III, adjustment plan with reversing change-over selector connection
(719850).......................................................................................................................................... 249
14.18 VACUTAP® VRC I/VRE I, adjustment plan with reversing change-over selector connection (719851)
......................................................................................................................................................... 250
14.19 VACUTAP® VRD/VRF, adjustment plan with reversing change-over selector connection (721092)....
251
14.20 VACUTAP® VRG, adjustment plan with reversing change-over selector connection (727074)..... 252
14.21 VACUTAP® VRC/VRE, adjustment plan with coarse tap selector connection (719852)................ 253
14.22 VACUTAP® VRC, adjustment plan with multiple coarse change-over selector for change-over
selector division 10, 2-5 coarse tap connections (731412)............................................................. 254
14.23 VACUTAP® VRC, adjustment plan with multiple coarse change-over selector for change-over
selector division 12, 2-5 coarse tap connections (731411)............................................................. 255
14.24 VACUTAP® VRC, adjustment plan with multiple coarse change-over selector for change-over
selector division 14, 2-5 coarse tap connections (731410)............................................................. 256
14.25 VACUTAP® VRC, adjustment plan with multiple coarse change-over selector for change-over
selector division 16, 2-5 coarse tap connections (731000)............................................................. 257
14.26 VACUTAP® VRC, adjustment plan with multiple coarse change-over selector for change-over
selector division 18, 2-5 coarse tap connections (730977)............................................................. 258
14.27 VACUTAP® VRD/VRF, adjustment plan with coarse tap selector connection (721091)................ 259
14.28 VACUTAP® VRG, adjustment plan with coarse tap selector connection (727075)........................ 260
14.29 Tracing template for on-load tap-changer head (890183)............................................................... 261
14.30 Socket wrench for kerosene drain plug (723015)............................................................................ 262
14.31 Screw tools for installation and maintenance (723016)................................................................... 263
14.32 Bevel gear CD 6400, dimensional drawing (892916)...................................................................... 264
Glossary........................................................................................................................... 265

1 Introduction
Maschinenfabrik Reinhausen GmbH 201510 4349315/00 ENVACUTAP® VR®
Introduction
This technical file contains detailed descriptions of the safe and proper in-
stallation, connection, and commissioning of the product.
It also includes safety instructions and general information about the prod-
uct.
Information about operation can be found in the operating instructions.
This technical file is intended solely for specially trained and authorized per-
sonnel.
Validity
The document supplied with the product is always the valid version. This
technical file is configured for the specific order and applies to the following
products, the serial numbers of which can be found on the delivery docu-
ments:
▪ VACUTAP® VR® on-load tap-changer
▪ Protective relay RS 2001
▪ Pressure monitoring device DW 2000 (optional)
▪ Drive shaft
Manufacturer
The product is manufactured by:
Maschinenfabrik Reinhausen GmbH
Falkensteinstraße 8
93059 Regensburg, Germany
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
Further information on the product and copies of this technical file are avail-
able from this address if required.
Subject to change without notice
The information contained in this technical file comprises the technical speci-
fications approved at the time of printing. Significant modifications will be in-
cluded in a new edition of the technical file.
The document number and version number of this technical file are shown in
the footer.
Completeness
This technical file is incomplete without the supporting documentation.
1
1.1
1.2
1.3
1.4

1 Introduction
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Supporting documents
The following documents also apply in addition to this technical file:
▪ Unpacking instructions (included in the scope of delivery)
▪ Supplement (included in the scope of delivery)
▪ Routine test report (included in the scope of delivery)
▪ Connection diagrams
▪ Dimensional drawings
▪ Technical data - General section (available on request)
▪ Technical data - Product-specific section (available on request)
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.
Safekeeping
This technical file and all supporting documents must be kept ready at hand
and accessible for future use at all times.
Notation conventions
This section contains an overview of the symbols and textual emphasis
used.
Symbols
Symbol Meaning
Wrench size
Tightening torque
Number and type of fastening materials used
Fill with oil
Cut open, cut through
Clean
1.5
1.6
1.7
1.7.1

1 Introduction
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Symbol Meaning
Visual inspection
Use your hand
Adapter ring
Apply a coat of paint
Use a file
Grease
Coupling bolt
Use a ruler
Use a saw
Hose clip
Wire eyelet, safety wire
Use a screwdriver
Table 1: Symbols
Hazard communication system
Warnings in this technical file are displayed as follows.
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:
1.7.2
1.7.2.1

1 Introduction
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WARNING Type and source of danger
Consequences
► Action
► Action
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.
Signal words and pictograms
The following signal words are used:
Signal word Meaning
DANGER Indicates a hazardous situation which, if not avoided, will re-
sult 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 injury.
NOTICE Indicates measures to be taken to prevent damage to prop-
erty.
Table 2: Signal words in warning notices
Pictograms warn of dangers:
Pictogram Meaning
Warning of a danger point
Warning of dangerous electrical voltage
Warning of combustible substances
1.7.2.2
1.7.2.3

1 Introduction
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Pictogram Meaning
Warning of danger of tipping
Table 3: Pictograms used in warning notices
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.
1.7.3

2 Safety
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Safety
General safety information
This technical file contains detailed descriptions of the safe and proper in-
stallation, connection, and commissioning of the product.
▪ Read this technical file through carefully to familiarize yourself with the
product.
▪ Particular attention should be paid to the information given in this chap-
ter.
Appropriate use
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 haz-
ards to people, property or the environment. This applies throughout the
product's entire life, from delivery through installation and operation to disas-
sembly and disposal.
The operational quality assurance system ensures a consistently high quality
standard, particularly in regard to the observance of health and safety re-
quirements.
The following is considered appropriate use
▪ Only operate the product in accordance with this technical file and the
agreed delivery conditions and technical data
▪ Use the equipment and special tools supplied solely for the intended
purpose and in accordance with the specifications of this technical file
▪ Use the product only with the transformer specified in the order
▪ You will find the standard valid for the product and the year of issue on
the name plate
▪ The serial numbers of on-load tap-changers and on-load tap-changer
accessories (drive, drive shaft, bevel gear, protective relay etc.) must
match if the on-load tap-changers and on-load tap-changer accessories
are supplied as a set for one order.
The on-load tap-changer is not intended to be used with an oil filter unit.
2
2.1
2.2

2 Safety
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DANGER Danger of death or severe injury and damage to property and
the environment!
Danger of death or severe injury and damage to property and the environ-
ment due to electrical voltage, falling and/or tipping parts as well as danger-
ous cramped conditions resulting from moving parts!
► Adherence to the following prerequisites and conditions is mandatory.
► Adhere to warning notices.
Since the on-load tap-changer was dimensioned as per IEC 60214-1, it can
switch currents of up to twice the value of the rated through current.
On-load tap-change operations are not to be performed during operating
conditions with higher currents.
Examples of such operating conditions are:
▪ Inrush current impulses when transformers are switched on
▪ Short circuit
The rated step voltage may be briefly exceeded by up to 10 % as long as the
rated through current is not exceeded. Such an operating condition can oc-
cur due to overexcitation of the transformer after load shedding, for example.
The on-load tap-changer can be operated in the temperature range of the
surrounding transformer oil of between -25 ° and +105 °C and with overload
up to +115 °C in accordance with IEC 60214-1.
Inappropriate use
Use is considered to be inappropriate if the product is used other than as de-
scribed in the Appropriate use [► 15] section. Please also note the following:
▪ Risk of explosion and fire from highly flammable or explosive gases, va-
pors, or dusts. Do not operate product in areas at risk of explosion.
▪ Unauthorized or inappropriate changes to the product may lead to per-
sonal injury, material damage, and operational faults. Only modify prod-
uct following discussion with Maschinenfabrik Reinhausen GmbH.
Personnel qualification
The product is designed solely for use in electrical energy systems and facili-
ties operated by appropriately trained staff. This staff comprises people who
are familiar with the installation, assembly, commissioning and operation of
such products.
2.3
2.4

2 Safety
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Operator's duty of care
To prevent accidents, disruptions 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:
▪ All warning and hazard notices are complied with.
▪ Personnel are instructed regularly in all relevant aspects of operational
safety, the operating instructions and particularly the safety instructions
contained therein.
▪ Regulations and operating instructions for safe working as well as the
relevant instructions for staff procedures in the case of accidents and
fires are kept on hand at all times and are displayed in the workplace
where applicable.
▪ The product is only used when in a sound operational condition and
safety equipment in particular is checked regularly for operational relia-
bility.
▪ Only replacement parts, lubricants and auxiliary materials which are au-
thorized by the manufacturer are used.
▪ The specified operating conditions and requirements of the installation
location are complied with.
▪ All necessary devices and personal protective equipment for the specific
activity are made available.
▪ The prescribed maintenance intervals and the relevant regulations are
complied with.
▪ Installation, electrical connection and commissioning of the product may
only be carried out by qualified and trained personnel in accordance
with this technical file.
▪ The operator must ensure appropriate use of the product.
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.
▪ Follow information about personal protective equipment provided in the
work area.
2.5
2.6

2 Safety
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Always wear
Protective clothing
Close-fitting work clothing with a low break-
ing strength, with tight sleeves and with no
protruding parts. It mainly serves to protect
the wearer against being caught by moving
machine parts.
Do not wear any rings, necklaces or other
jewelry.
Safety shoes
To protect against falling heavy objects and
slipping on slippery surfaces.
Table 4: Personal protective equipment to be worn at all times
Wear the following in spe-
cial environments
Special personal protective equipment
is needed in special environments.
The choice of equipment depends on
the circumstances.
Safety glasses
To protect the eyes from flying parts and
splashing liquids.
Hard hat
To protect from falling and flying parts and
materials.
Hearing protection
To protect from hearing damage.
Table 5: Personal protective equipment to be worn in special environments
Protective devices
The following protective devices for the product are included as standard in
the scope of delivery or are available as options.
2.7

2 Safety
Maschinenfabrik Reinhausen GmbH 2015 194349315/00 EN VACUTAP® VR®
Protective relay RS
The protective relay RS is an oil flow-controlled relay in accordance with IEC
60214-1. It is installed between the on-load tap-changer head and the oil
conservator of the on-load tap-changer.
It triggers when the specified oil flow between oil compartment of the on-load
tap-changer and oil conservator is exceeded.
Pressure monitoring device
The pressure monitoring device DW 2000 is installed on the outside of the
on-load tap-changer and is tripped by unacceptable static and dynamic pres-
sures in the on-load tap-changer oil vessel.
Additional use of a pressure-operated relay also requires installation of the
provided RS 2001 protective relay.
The features and characteristics of the pressure monitoring device comply
with the respective applicable version of IEC publication 60214-1.
Rupture disk
The rupture disk is a pressure relief device without signaling contact in ac-
cordance with IEC 60214-1 and is located in the on-load tap-changer head
cover.
The rupture disk responds to a defined overpressure in the oil compartment
of the on-load tap-changer.
Pressure relief device MPreC®
On request, in place of the rupture disk MR will supply a pre-fitted pressure
relief device MPreC® that responds to a defined overpressure in the oil com-
partment of the on-load tap-changer.
The on-load tap-changer therefore meets the requirements of IEC 60214-1
regarding pressure relief devices.
Tap-change supervisory control
The tap-change supervisory control monitors both the drive shaft between
on-load tap-changer(s) and motor-drive unit and the correct switching of the
diverter switch.
Temperature monitoring
The temperature monitoring device monitors the oil temperature in the oil
compartment of the on-load tap-changer.
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6

2 Safety
Maschinenfabrik Reinhausen GmbH 201520 4349315/00 ENVACUTAP® VR®
Protective devices in the motor-drive unit
The following protective devices are fitted in the motor-drive unit:
▪ End stop device (mechanical and electric)
▪ Device protecting against unintentional passage
▪ Motor protection device
▪ Protection against accidental contact
2.7.7