Attachment 2 HMB 8.11 Mechanism Retrofit_2GNM110145.pdf

HMB 8.11 Mechanism Retrofi t Dead Tank Circuit Breaker Reliability and Performance Upgrade

A new level of performance Retrofi t means upgrading an existing system with modern components, in order to optimize technical, safety, economical, reliability, and maintenance factors. The ABB retrofi t solution covers a migration of components which have been subject to the most wear during the breaker’s years in operation. One of the core circuit breaker components is an operating mechanism.

Consequently, a retrofi t solution is a cost effective method to upgrade and extend the life of the breaker. The result is a major improvement in reliability, safety, maintenance reduction, and performance - an outstanding way to maximize asset value.

Retrofi t benefi ts Reliability

− Signifi cant life cycle extension

− Lower maintenance requirements

− Long term availability of spare parts

− Short lead time of spare parts

Technology − Latest mechanism generation

− Upgrading of technical ratings to current standards

− Type-tested to latest standards

Project Execution − Short replacement time minimizes outage schedule

− Shorter lead time than new breaker replacement

− Smooth project execution by ABB

Investment − Fixed capital investment

− Reduction of future maintenance costs

− Warranty for retrofi t components

Design and performance The performance of the circuit breaker will be remarkably increased by migration of the existing mechanism to the latest design. The development, engineering, and production of this retrofit kit is based on the long experience of ABB in the field SF gas circuit breakers.

The HMB 8.11 retrofit will extend the life cycle of the highly durable and reliable PA style breaker. The HMB is a virtually maintenance free hydraulic spring operating mechanism.

Application

HMB 8.11 for ABB high voltage SF circuit breakers, type PA

121 - 242 kV 50 - 63 kA manufactured after 1988

HMB 8.11 replaces HKA-12, AHMA-8, or AHMA-11 mechanisms

Main retrofit features

• New HMB 8.11 mechanism

• Quick installation time

• 100% compatible retrofit kit includes:

− Same breaker mounting location

− Universal AC/DC pump motor

− Wiring diagram

− Mechanism name plate

− Mechanism wiring harness

− Counter to count the close operations

− HMB 8 coupling piece

− Two HMB-8 instruction books

− Additional circuit change components

− Core rebate on reusable AHMA core

− Credit on reusable HKA pressure switch.

− One year warranty from date of shipment

PA 242 Circuit Breaker with AHMA Mechanism

D o c u m e n t

N u m b e r

G N

M

A u g u st

For more information please contact:

ABB Inc.

High Voltage Service

100 Distribution Circle

Mount Pleasant, Pennsylvania, USA

Phone: +1 (724) 696-1300

Fax: +1 (724) 696-1379 www.abb.us/hvservice

Optional features − Pilot valve with removable coils

− Transformer to boost 208 VAC motor to 240 VAC

− Open operations counter

− Additional circuit with additional components

− MP plugs

Upgrade Advantages of HMB over AHMA & HKA − AHMA and HKA no longer in production

− Extends circuit breaker life cycle

− Improves circuit breaker reliability

− Abundance of reliable energy

− Sealing system improved

− Maintenance friendly modular design

− Improved motor gear design

− Oil free exchange of coils

− Improved pump element inlet sieve

− Auxiliary switches located on mechanism

− No special tools required for routine maintenance

− No lubricating maintenance required

− Operations counter to count the close operations

− Adjustable speed

− Internal hydraulic damping

− Long term availability of spare parts

Additional ABB services to support mechanism retrofi t and breaker upgrade

− Expert Field Service to perform retrofi t

− Replacement of all circuit breaker seals & desiccant

− SF

gas testing and decomposition analysis

− Replacement or rebuild interrupters on-site or at Service facility

− Strategic & critical spare parts for the entire breaker or fl eet

− Fleet or system assessment

− Other (reliability & life extension) options available upon request

Virtually maintenance free - Best practices for extending HMB mechanism operating life

Item to Check Frequency

Yearly 5 Years 10 Years

Oil Level Check Check Check

Oil Condition --- --- Check

Carbon Brushes --- Check Check

Motor Commutator --- Check Check

Anti-Condensation Heater Check Check Check

Wiring --- Check Check

Terminals --- Check Check

Start Counter Check Check Check

Hardware Tightness --- Check Check

Note:

The information contained in this document is for general information purposes only. While ABB strives to keep the information up to date and correct, it makes no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the information, products, services, or related graphics contained in the docu-ment for any purpose. Any reliance placed on such information is therefore strictly at your own risk. ABB reserves the right to discontinue any product or service at any time.

© Copyright 2014 ABB. All rights reserved.

PA Breaker with HMB 8.11 Retrofit

Upgrade Part Numbers

Mechanism Type Trade-In New

HMB-8.11 641C25201

HMB-8.2 641C21802

AHMA-8 641C13004-U

AHMA-11 641C17201-U

HKA GPHL011767R16-U

Stored Energy Level HMB 8.11 O.C.O. 15 sec. C.O.