modernization webinar

14
Switchgear Modernization Solutions Improve Power System Reliability and Lower Life-Cycle Costs Presented by: Doug Robling, U.S. Services Division

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Page 1: Modernization Webinar

Switchgear Modernization Solutions

Improve Power System Reliability

and Lower Life-Cycle Costs

Presented by:

Doug Robling, U.S. Services Division

Page 2: Modernization Webinar

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

Page 3: Modernization Webinar

Two cost-effective

modernization solutions

are available to upgrade

your existing equipment

to current technology and

save time and money.

● Direct Replacement

● Retrofill

Page 4: Modernization Webinar

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.

Page 5: Modernization Webinar

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

Page 6: Modernization Webinar

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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

Page 7: Modernization Webinar

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

Page 8: Modernization Webinar

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

Page 9: Modernization Webinar

● 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

Page 10: Modernization Webinar

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.

Page 11: Modernization Webinar

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

Page 12: Modernization Webinar

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

Page 13: Modernization Webinar

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

Page 14: Modernization Webinar

Questions Answers