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Power Transformers
Comparison betweenconventional and vacuum technology
in On-Load Tap-ChangersMr. Günter Panzer
Maschinenfabrik Reinhausen GmbH
Sales Middle East, India, Africa
Director
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Date: 15.09.2011
REINHAUSEN Group
Business units, customers and brands
Transformer
Control
Power
Composites
Power
Quality
Plasma
Applications
Highvolt
Test Systems
TC PQ
PA HT
PC
Power Composites
TransformerControl
PowerQuality
Plasma Applications
HighvoltTest-Systems
Project
Component Product
SystemManufacturer
Enduser
Hochleistungs-
kunststoffe
Regelung von
Transformatoren
Blindleistungs-
kompensation
Plasma-
Anwendungen
Hochspannungs-
Prüftechnik
Page 2 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Date: 15.09.2011
REINHAUSEN Group
Milestones
Production start of Shipping Saws in Reinhausen
Maschinenfabrik Reinhausen Andreas Scheubeck
Patent no. 474 613 granted to Dr.-Ing. Bernhard Jansen
Market Introduction of OILTAP® Type M (Mechanical innovation)
MRB, Embu/Brazil
RA, Rockdale/Australia
RM, Humboldt/USA
RI, Mailand/Italy
MRC, Panyu/China and EMR, Thiruninravur/India
RAP, Kuala Lumpur/Malaysia Reactive Power Compensation MS (PQM) taken over from Siemens
MESSKO, Oberursel/Germany
Market Introduction of VACUTAP® Type VV (Switching techn. innovation)
MRJ, Yokohama/Japan Delivery of the 100.000th Tap-changer
HV, Dresden/Germany
MRR, Moscow/Russia Low-voltage Compensation Systems business taken over
from AEG KuW GmbH, Berlin/Germany
RP, Regensburg/Germany
SBR (today RZA), Johannesburg/South Africa
MRT, Shanghai/China and RME, Dubai/VAE Acquisition of shares in ITASS Iran Transfo After Sales Service Co.
MR acquired majority of JE Plasma Consult GmbH, Wuppertal/Germany
MRM, Suzhou/China
RKR, Seoul/South Korea, RLU, Luxembourg
and RPC Regensburg/Germany
RCA, Montreal/Canada
RID, Jakarta/Indonesia
1868
1901
1926
1973
1980
1987
1990
1993
1996
1997
1999
2000
2001
2002
2003
2004
2005
2006
2007
2009
2010
2011
Page 3 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Date: 15.09.2011
REINHAUSEN Group worldwide
Page 4 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Vacuum Technology
Experience
Advantages
VACUTAP® Technology
Page 5 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
No Interaction between Arc and Oil
Conventional technology
Switching arc under oil
Oil: insulating, cooling, lubricating and
arc quenching
VACUTAP® technology
Switching arc in vacuum
Oil: just insulating, cooling and
lubricating
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 6 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Extended Oil Service Life
Conventional technology
Oil ageing due to carbon particles
resulting from arc quenching
Oil filter to be exchanged regularly
VACUTAP® technology
No break-down arc in tap-changer oil
No oil filter unit necessary
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 7 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Marginal Contact Wear
Conventional technology
Contact wear
Contact life: 200,000 to 500,000
switching operations
VACUTAP® technology
Rate of contact wear is more than one
decade lower compared with copper-
tungsten contacts
Contact life: 600,000 switching
operations
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 8 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Less Maintenance
Conventional technology
Maintenance each 40,000 to 100,000
switching operations, depending on the
operation mode
Additional time-based criteria
VACUTAP® technology
Maintenance each 300,000 switching
operations, therefore maintenance-free
in most network applications
Enhanced transformer availability
No time- or current-based criteria
Less spare parts, simplified logistics
Maintenance intervals Maintenance intervalst t
VACUTAP® © Copyright MR Maschinenfabrik Reinhausen GmbH
Page 9 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Ecologically Friendly
Conventional technology
Mineral oil
Carbonized oil and filters to be
disposed
VACUTAP® technology
Mineral oil and alternative insulating
liquids possible
Fewer oil changes necessary
(extended oil service life)
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 10 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Applications
Applications
Page 11 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Network Application
Highest system availability
- Maintenance free on-load tap-changer over
the service life of the transformer
- Significantly longer oil service life and contact life
Example:
Delta-connection, 5,000 switching operations per year,
Conclusion: 60 years transformer service life
without any maintenance
- No costs for on-load tap-changer maintenance, spare
parts and oil filters over the transformer service life0 %
100 %
OILTAP® VACUTAP®
Maintenance costs
VACUTAP® © Copyright MR Maschinenfabrik Reinhausen GmbH
Page 12 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
OILTAP® VACUTAP®
100 %
Electric Arc Furnace (EAF) Application
High system availability and reliability
- Maintenance interval: 300,000 switching operations
without time- or current-based criteria
- Significantly longer oil service life and contact life
Example:
200,000 switching operations per year,
Guess: 20 years transformer service life
- Cost reduction for on-load tap-changer maintenance,
spare parts and oil filters over the transformer service life
- Can be again reduced using VR-I-HD (Heavy Duty)
600,000 switching operations without time- or current-
based criteria
Maintenance costs
VACUTAP® © Copyright MR Maschinenfabrik Reinhausen GmbH
Page 13 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Extended Application Range
Conventional technology
Limitations in HVDC or converter
transformer applications
VACUTAP® technology
Very quick dielectric recovery (up to 10
kV/µs)
Time
(ms)
Current/
Voltage
Recovery Strength
Vacuum 10 kV/s
HVDC
HVDC-Transformer
Network-Transformer
4 6 8 102-2 0
Curent
Zero
Time
(ms)
Current/
Voltage
Recovery Strength
Conventional
HVDC
HVDC-Transformer
Network-Transformer
4 6 8 102-2 0
Curent Zero
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 14 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
High-voltage Direct Current Transmission (HVDC)
Application
High system availability and reliability
- Maintenance interval: 300,000 switching
operations without time- or current-based
criteria
- Significantly longer oil service life and
contact life
Quick recovery voltage of 10kV/µs facilitates
the switching of non-sinusoidal currentsTime
(ms)
Current/
Voltage
Recovery Strength
Vacuum 10 kV/s
HVDC
HVDC-
Transformer
Network-
Transformer
4 6 8 102-2 0
Curent
Zero
VACUTAP® © Copyright MR Maschinenfabrik Reinhausen GmbH
Page 15 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
Products
Vacuum Technology
Products
Page 16 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
More than 20 Years of Experience in VACUTAP®
Technology
VACUTAP®
RMV-II
1989 1995 2000 2001 2004 20102006
More than 27,000 supplied units of VACUTAP®
VACUTAP®
VT
VACUTAP®
VV
VACUTAP®
RMV-AVACUTAP®
AVT
VACUTAP®
VR 700
VACUTAP®
VR 1300
VACUTAP®
VR I HD
2011
VACUTAP®
VM
1989 1995 2000 2001 2004 2006 2010 2011
VACUTAP® © Copyright MR Maschinenfabrik Reinhausen GmbH
Page 17 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011 18
VACUTAP®: Portfolio
VACUTAP®
© Copyright MR Maschinenfabrik Reinhausen GmbH
Page 18 of 19
Date: 15.09.2011Sales Department
© Maschinenfabrik Reinhausen GmbH 2011
VACUTAP® VM
On-load Tap-changer for Transformers
Maintenance Intervals
Don‘t Compromise!An investment that quickly pays off