P R O D U C T I N F O R M AT I O N
Dead Tank Circuit Breakers up to 420 kV
Installation time of less than 16 hours
The 362-420 kV rated Dead Tank
Breakers provide robust performance
at a low cost of ownership. Tested
for high transient recovery voltage
(TRV) performance applications,
mechanical endurance and switching
capabilities and designed for the
toughest transmission applications.
01 420PM-HB Dead
Tank Circuit Breaker
Why Hitachi ABB Power Grids?
Our focus is on providing ulitity and industrial customers
with technology that increases the efficiency, availability
and reliability of the power grid. We stand on over a
century of experience with many firsts in the market.
We drive our developments to be centered around
solutions, to solve problems so that our customers can
better serve their customers.
Design features
• Installation time of approximately 16 hours as the
breaker is shipped in only 4 sections (3 pressurized
poles with bushing and mechanism attached, and
frame with associated control housing)
• Enhanced safety and simplified maintenance
• Rated up to and including 63 kA with no external line
to ground capacitors
• Slipover current transformers that are added or
removed without disassembly, reducing maintenance
downtime and eliminating contamination risk
• 10 year warranty on the HMB operating mechanism
• Widely installed base in all environments and
applications
• Global service organization, local everywhere
For shunt reactor switching, Hitachi ABB Power Grids
now offers Dead Tank Breakers with applied Metal
Oxide Varistors (MOVs). This solution increases the
reliability of the breaker by limiting damaging
overvoltages.
Applications
• Line, transformer, reactor and capacitor switching
• Point-on-wave switching
• High seismic applications
• High altitude applications
HITACHI ABB POWER GRIDS
Reliable operating mechanism
For many years, Hitachi ABB Power Grids has used
operating mechanisms with energy mechanically stored in
springs. The spring operating mechanisms used for the
362-420 kV Dead Tank Breakers are BLG or HMB
depending on customers’ application and requirements.
The BLG spring spring design is a well-proven technology
with a high degree of total reliability for the circuit breaker
and a minimal need for maintenance. The mechanism
operates by an endless chain which links a cam disc and
a set of springs. The chain, which is in two loops and runs
over a motor-driven sprocket, transmits energy when the
springs are being charged and drives the cam disc around
when the circuit breaker is to be closed. The springs are
kept in the charged state by a latch that is released when
the breaker is being closed. This enables rapid reclosing
of the breaker after a dead time interval of 0.3 s.
After sales and service
Hitachi ABB Power Grids has a long history of supporting
utilities’ needs for expanded breaker performance in
response to the growing demands of a continuously
evolving power grid.
Our approach to product support is to offer services that
improve reliability and extend the operating life of a
customer’s circuit breaker, while reducing operation and
maintenance costs at each life cycle phase. We offer the
most comprehensive and cost-effective alternatives to the
purchase of new power equipment.
The HMB spring hydraulic mechanism is comprised of a
stack of disk springs that stores mechanical energy. That
energy is hydraulically translated through an operating
shaft to open and close the contacts of its respective
interrupter. Spring charge is automatically maintained by
a universal motor and pump. Each fully-integrated
mechanism is self-lubricating and hermetically-sealed,
affording excellent reliability and long term stability.
Technical data
420PM-HB
362PMR-HB
420PM-SB
Rated voltage
kV
362-420
362-420
362-420
Short-circuit breaking current*
kA
40-63
40-63
40-63
Rated current
A
5000
5000
5000
Break time
cycles 2
2
2
Closing and latching current
kA
104-164
104-164
104-164
Lightning impulse withstand level LIWL
kV
1300, 1425
1300, 1425
1300, 1425
Operation type
Single-pole
operated
Single-pole operated
Single-pole operated
Operating mechanism
HMB 4
HMB 4
BLG
Reactor protection
External MOV
No standard MOV**
External MOV
-30 to +40
1000
-30 to +40
1000
-30 to +40
1000
Service conditions
- Ambient temperature*
- Design altitude*
°C
m
Hitachi ABB Power Grids
High Voltage Dead Tank Breakers
100 Distribution Circle
Mt. Pleasant, PA 15666
Phone: +1 724-696-1500
www.hitachiabb-powergrids.com
We reserve the right to make technical changes or
modify the contents of this document without prior
notice. With regard to purchase orders, the agreed
particulars shall prevail. Hitachi ABB Power Grids does
not accept any responsibility whatsoever for potential
errors or possible lack of information in this document.
We reserve all rights in this document and in the subject
matter and illustrations contained therein. Any
reproduction, disclosure to third parties or utilization of
its contents – in whole or in parts – is forbidden without
prior written consent of Hitachi ABB Power Grids .
Copyright© 2021 Hitachi ABB Power Grids
All rights reserved
9AKK107992A1056 REV A 4.2021
*Other options available, contact factory for additional information.
** Available by request.