Nuclear GSU Version 5 - Mitsubishi Electric Power Products, Inc.

MITSUBISHI ELECTRIC
POWER PRODUCTS, INC.
Large Power Transformers for Nuclear Power
Plant Generator Step-Up Applications
MITSUBISHI ELECTRIC
POWER PRODUCTS, INC.
530 Keystone Drive
Warrendale, Pennsylvania 15086-7538
Tel. (724) 778-5111
Fax: (724) 778-5149
www.meppi.com
Mitsubishi Electric Manufacturing
and MEPPI Project Management
with Local Support
Mitsubishi Electric Manufacturing
Plant — the Ako works (Japan) offers nuclear generation GSUs based
upon the shell-type design, which has
been shown to exceed the performance of core-type for such high-demand applications. Benefits include:
400 MVA 500/22kV 1-phase GSU
Delivery and Installation — October 2005
Mitsubishi Electric is a worldwide
leader in the technology of power
transformers applied to nuclear
power plants. More than 630 transformer units at or above 500kV have
been produced including 53 Generator Step-Up (GSU) transformers
presently installed on nuclear power
generators. The transformer
products of Mitsubishi Electric
incorporate innovative thinking and
customer-driven design with costefficient performance.
If you are facing an aging transformer fleet and are concerned about the
reliability and power delivery of your
nuclear plant, MEPPI can help. We
would be glad to visit your facility to
discuss transformer replacement
options and our project management
capabilities.
High short-circuit withstand
capability: The tank of a shell-form
transformer is a “form-fit” design
that fits over the core. This enables
the transformer to withstand high
mechanical forces during an external
short-circuit condition.
High dielectric strength.: In shellform transformers, the pressboard
materials that surround the coils
subdivide the oil insulation into many
small gaps. The oil-impregnated
pressboard materials have a much
higher dielectric strength than the oil
gaps. This insulation design leads to
a very high dielectric strength.
Efficient cooling capability:
Shell-form transformers have an
efficient cooling capability due to the
vertically arranged pancake coils.
This allows the oil to easily flow
across the entire coil surface and
cool the transformer.
High reliability and flexibility:
About 98% of all Mitsubishi shellform transformers supplied since
1960 are still in operation. Mitsubishi transformers can be designed to
physically match the existing shellform transformers without the need
to modify the existing foundations or
Isolated Phase Bus low voltage connection points, if required.
The Ako works specializes in producing large MVA, high voltage shellform transformers, and has vast
experience in producing many of the
world’s largest transformers. Some
other notable figures about Ako
include:
• Top 5 world manufacturer of
large power transformers
established in 1921, with
production capacity of 33GVA
per year
• Around 100 units have been
supplied to U.S. customers
in the past 6 years
• Ako works is recognized worldwide as one of the cleanest,
most-advanced transformer
factories in the world, and is
ISO 9001 certified
684MVA, 230/25kV 3-phase GSU • Delivery and Installation: February 2005
• Very low failure rate
• Excellent on-time delivery record
Mitsubishi Electric Power Products,
Inc. (MEPPI), located in Warrendale,
PA, is responsible for all Mitsubishi
Electric Corporations transmission
and distribution electrical equipment
in the U.S., including large power
transformers. The primary point of
contact between U.S. customers
and our factories in Japan is the
MEPPI office.
Plan to upgrade your nuclear
station’s GSU transformer in advance and raise your generating
plant’s reliability to the highest level
of confidence. Mitsubishi Electric’s
technologies and strong local MEPPI
engineering and marketing support
will be there whenever and wherever
you need. Choose MEPPI.
The Ako works factory Ako-city,
Hyogo prefecture Japan
Mitsubishi Electric Power Products, Inc.
Headquarters - Warrendale, Pennsylvania
USA
Mitsubishi Electric Japan
All technical and commercial communications would be handled by
the MEPPI Substation Department
— a fully staffed group of project
managers, project engineers, project
drafters, project purchasing, and accounting as well as other functions.
A project manager is responsible for
arranging and overseeing the local
inland transportation and installation
for the transformers in the USA.
A factory field service engineer is
present for installation supervision of
the transformer. A transformer application engineer is on staff to provide
technical support, assist the project
manager, make any necessary site
visits, perform inspections, and
handle customer’s service requests.