Modernization Webinar
-
Upload
jose-jorge-fontalvo -
Category
Documents
-
view
20 -
download
2
description
Transcript of Modernization Webinar
Switchgear Modernization Solutions
Improve Power System Reliability
and Lower Life-Cycle Costs
Presented by:
Doug Robling, U.S. Services Division
When considering whether to replace or continue to maintain
existing equipment, there are a number of factors to consider.
● Operating environment
● Availability of spare parts
● Impact of downtime
● Cost of ongoing
maintenance
● Need to increase fault or
continuous current rating
● Desire to upgrade to
current technology
Two cost-effective
modernization solutions
are available to upgrade
your existing equipment
to current technology and
save time and money.
● Direct Replacement
● Retrofill
Utilizing the existing
equipment structure
and footprint saves
time and money.
Installing new switchgear, which is
usually smaller than the older or
obsolete equipment it is replacing,
requires that existing conduit above
and below the equipment be moved.
This is a time-consuming and costly
process.
Direct Replacement: Circuit breakers are designed to fit into the
existing cubicle with little-to-no modification to the switchgear cell.
● Reduces downtime since there
is minimal (if any) outage on
the equipment bus
● Designs are available for any
manufacturer’s low-voltage
(LV) or medium-voltage (MV)
switchgear
- LV: MasterpactTM circuit breaker
- MV: MagnumTM circuit breaker
Above:
Masterpact Circuit Breaker
Right:
Magnum Circuit Breakers
oo oo
oo oo
o oo o oo
o oo o oo
o o o O O
o
o
oo oo
oo oo
oo oo
oo oo
o oo o oo
o oo o oo
o o o O O
o
o
o oo o oo
o oo o oo
o o o O O
o
o
Low Voltage Direct Replacement
● A new circuit breaker element, truck
and carriage assembly are installed in
existing switchgear
● Interfaces with the existing structure
and maintains safety interlocks
inherent with the original design
● The interior of existing cells are not
modified; adapter cradle designs are
available for most manufacturers’
brands of switchgear
● A Masterpact circuit breaker fits into
the adapter cradle and directly
replaces the existing circuit breaker
Masterpact Circuit Breakers: The Latest in Circuit Breaker Technology
Masterpact Circuit Breakers
and MicroLogic Trip Units
● High ampere interrupting (AIR) and short-time current ratings
● ModbusTM communication protocol, field-installable
devices, including sensor plugs and accessories
● Minimal maintenance requirements
● Draw-out circuit breakers with three racking positions
and status indicator on cradle
● Draw-out or fixed mount, 3- or 4-pole construction
● Integral ground-fault protection for equipment
● Protective relaying functions
● Zone-selective interlocking, which can reduce damage in the event of a detected fault
● Full nuclear certification including V&V or software and radiation
Medium Voltage
Direct Replacement
● A new circuit breaker element,
truck and carriage assembly are
installed in existing switchgear
● Interfaces with the existing
structure and maintains safety
interlocks inherent with the
original design
● The interior of the existing cell
is not modified
● Designs are available, utilizing
the Magnum circuit breaker, to
directly roll-in to the existing cell
● Available in 5 kV – 15 kV; upgraded MVA ratings available
● Low maintenance vacuum and SF6 arc interruption technology
● Meets the requirements of ANSI/IEEE C37.59 standards
● High dielectric strength, moisture resistant primary insulation
● Nuclear certification available
● No arc by-product ventilated into the compartment
● Reduced power consumption of the control components
● Optional capabilities
Increased arc fault current interruption capacity
Relay upgrade, improved accuracy and repeatability
and shorter interrupting time
Power monitoring and communication
Ground and test devices available
Remote racking solutions available
Magnum MV Circuit Breakers
The operating
mechanism
on Magnum MV
circuit breakers
is simple to inspect
and maintain
Retrofill Solution
The existing switchgear cell and bus are
modified to accept a new circuit breaker.
● New operating and racking mechanisms for
circuit breakers
● Typically requires more labor and downtime
that a direct replacement solution
● Both direct replacement and retrofill
solutions feature new cubicle doors
● Available for any manufacturer’s switchgear
Above: LV retrofill Below: MV retrofill, often used in lieu of the direct
replacement option for larger devices, such as main breakers and tie breakers.
Benefits of Modernizing Existing Switchgear
● Reduced costs for switchgear upgrades
New circuit breakers are installed in existing switchgear
Original footprint is left intact, saving time and money
● Less downtime for installation
Downtime is minimized compared to demolishing and
replacing existing equipment
● Enhanced equipment reliability
New circuit breakers undergo complete factory testing
and are backed by our standard equipment warranty
● Reduced maintenance and operating costs
New, easy-to-maintain operating mechanism
Reduced need for difficult to obtain spare parts
Any brand
Any industry
Any time
Trip Unit Retrofits for LV Circuit Breakers Additional options to
extend equipment life
include:
LV Trip Unit Retrofits
MV Contactor
Conversions
Circuit Breaker
Reconditioning
MV Contactor Conversions
● A retrofit upgrades the trip unit on low voltage circuit
breakers to current standards of over-current and
ground fault protection
Existing trip units are replaced with a solid-state design
Fused vacuum contactors conversions are also available for
most LV circuit breakers
● Available for all brands of 5kV – 15kV circuit breakers,
Upgrades equipment to current technology: vacuum or SF6
400 amp or 700 amp
● Increases electrical system capacity through better
coordination using fuses
● Extends circuit breaker life cycle to 100,000+ operations
Reconditioning: A cost-effective option to
extend the life of existing equipment.
● All circuit breakers need periodic
maintenance and testing
Maintenance of operating mechanism and
current-carrying parts
Cleaning and re-lubrication of pivot points
● Upon completion, the reconditioned circuit
breaker performs to manufacturer’s original
specifications
● While not a modernization solution,
reconditioning circuit breakers will:
Reduce unplanned downtime
Improve reliability
Extend equipment life
Questions Answers