Dry-type transformers
RESIBLOC
Transformer technology reducing
environmental impactEnvironmental protection, reliability
and enhanced safety
The challenge RESIBLOC has proven its worth for decades in applications
Dry-type transformers are frequently used in applications requiring a high level of reliability or where special environ-
where contamination and fire risks for people and the environ- mental conditions apply.
ment have to be eliminated. In addition to eliminating these
hazards, there are stringent electrical parameters that must Thanks to its glass-fibre content of approximately 80%, RESI-
also be met. BLOC provides outstanding mechanical strength, meaning it
is ideal for use in applications involving high mechanical stres-
Reliable transformer technology is essential not only in oil and ses. For example, RESIBLOC is ideal for use in environments
gas, marine, mining and steel, paper and chemical industries prone to earthquakes or applications with continual shocks.
but also in the fields of power generation and distribution. In addition, the glass fibres extend the range of temperatures
at which the transformer can be utilized; unrestricted use is
For applications involving exceptionally tough environmental possible even at a temperature of -60°C.
conditions, conventional solutions frequently do not meet all
the transformer requirements. Other advantages of RESIBLOC technology relate to protec-
tion of the environment. It is entirely oil-free and the use of
The solution other flammable materials has also been reduced to a mini-
The RESIBLOC® cast-resin transformer. RESIBLOC is the mum, thus avoiding any contamination in the transformer’s
solution when a transformer must meet the following require- surroundings and eliminating any additional fire risk.
ments:
– no risk for humans and the natural environment RESIBLOC provides a lot of potential for cost savings: its spe-
due to contamination cial construction minimizes both the requirement for spares
– non-explosive and flame-retardant inventories and the amount of maintenance work needed.
– heavy load cycles (cold start to maximum load)
– high short-circuit withstand capability Additional cost savings can be achieved with the newly de-
– stress due to tough ambient conditions veloped EcoDry transformers which offer even higher energy
– stress due to harmonics efficiency thanks to loss optimization. Thus, not only the costs
– overvoltage peaks are minimized, but the environmental impact as well.
– variable power factor control
– minimized maintenance The flexible production technology used allows for applica-
tion-responsive, customized transformers to be designed.
With ratings of up to 60 MVA and voltages of up to 72.5 kV, These include double-tier transformers, multi-winding models,
ABB offers RESIBLOC as an individually customized product single-phase transformers and customized versions, e.g. with
that meets all these requirements and conforms to the inter- on-load tap changers or special cooling systems.
national standards, IEC 60076-11, ANSI or IEEE.
2 RESIBLOC – Transformer technology reducing environmental impactRESIBLOC – Transformer technology reducing environmental impact 3Coping comfortably Overload withstand capability
The high winding time constant of RESIBLOC transformers
enables them to be operated at high short-time overload
right up to the limits
values: this can be factored in when deciding on the rating.
The maximum allowable hot-spot temperature of 155°C in
the winding is not exceeded during a brief overload if at the
beginning of the specific overload the transformer is being
operated at partial load and/or the ambient temperature is
lower than the design temperature.
Overload protection
In order to avoid thermal overloading due to high ambient
temperatures, inadequate cooling, and overload operation,
RESIBLOC transformers are equipped with a temperature
warning system. As a standard feature, the temperature relay
installed monitors up to three sensors simultaneously for up
to three limit values. Different types of sensors can also be
connected and evaluated, such as Pt100s. Also available
are monitoring capabilities for additional sensors or for bus
system connections.
Forced air cooling
There is an option for fitting RESIBLOC transformers with
quiet-running cross-flow fans. When lengthy overload periods
are involved, they can improve the transformer’s power output
by up to 40% of its rating. Fan utilization is controlled automa-
tically using sensors.
4 RESIBLOC – Transformer technology reducing environmental impactComprehensive service support
The delivery package for RESIBLOC will contain many ad- After the transformer has been manufactured, we can sup-
ditional services besides the transformer itself. A team of port our customers with a comprehensive range of services,
knowledgeable engineers clarifies all the technical details with not only for delivery and commissioning but also extending
the customer and formulates the optimum solution for the beyond the warranty period.
application involved. Customers can confidently put their trust
in ABB’s experience which has been gained from exposure to Our team can carry out maintenance jobs on site during the
a wide range of transformer applications. transformer’s entire operating lifetime such as professional
cleaning routines or tests for analyzing the transformer’s on-
All production processes are run under an integrated mana- going condition. This is useful for safeguarding against failures
gement system, designed to ensure that the manufacturing and improving system dependability.
operation remains at a level of maximized efficiency while
minimizing environmental impact and assuring staff safety. Our retrofit capabilities include more elaborate on-site jobs,
like replacing or retrofitting particular components, even an
All processes are performed in compliance with the DIN EN entire coil if necessary. Accessory parts like converters, fans
ISO 9001, DIN EN ISO 14001 and BS OHSAS 18001 stan- or rain roofs can also be retrofitted as needed.
dard, and continuously monitored.
Our service capabilities are available to you all year round, so
Each RESIBLOC transformer is subjected to comprehensive you can ensure that your systems are operating reliably day in
testing in conformity with international standards. Further and day out.
tests can be agreed upon for a specific project.
RESIBLOC transformers are frequently used in applications
where strict requirements have to be met, for example, oil and
gas industry applications. As a result, these transformers can
be manufactured in conformity with the specifications of diffe-
rent classification societies (e.g. DNV, ABS, Bureau Veritas or
German Lloyd).
RESIBLOC – Transformer technology reducing environmental impact 5The technology
6 RESIBLOC – Transformer technology reducing environmental impactThe RESIBLOC cast-resin transformer is a path-breaking
innovation in the field of naturally cooled dry-type transformers.
The RESIBLOC technology has been continually design-
enhanced; nowadays it is available for ratings of up to 60 MVA
and insulation voltages of up to 72.5 kV.
Glass-fibre reinforcement – The high glass-fibre content of around 80% and the combina-
a guarantee against crack formation tion of radial rovings and axial-reinforcement glass-fibre con-