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h i g h - v o lta g e s e r v i c e s
Retrofit solution for circuit breaker type EDF
Desiccant canister helps improving SF6 gas quality
Retrofit solutions are designed to
substantially extend the service
span of your installations by
subsequently upgrading the
equipment with state-of-the-art
components.
— Retrofit constitutes replacement or modification of Benefits
01 ABB retrofit
solution for crucial vital parts that have similar or advanced features, • Increased moisture absorption within the breaker
substation component for life extension, reduced maintenance and im- • Improved dew point in circuit breakers
proved functionality. This includes upgrade & mod- • Retrofit can be done in minimum outage
ernization of basic equipment and allied parts.
SF6 gas is used as insulation in high-voltage(HV)
switchgear. Material moisture can affect the insula-
tion withstand of SF6 gas. Due to oxygen and mois-
ture vapor contaminants in SF6, being continuously Gas valve
replenished via transmission from the external envi- Bolted
ronment through seals, corrosive SF6 decomposition
products can be formed, which in excess quantities
adversely affect critical parts of the breaker. Mois-
ture absorbing molecular sieves in canisters not only
maintain required SF6 insulation withstand perfor-
mance, but also limit amounts of corrosive
by-products. valve screen Weld joint
Features of desiccant canister
• Compact, rugged, and reusable
• Volume of container : 1.87 Litre
• Weight of container: 3.4 kg
• Desiccant accommodated weight : 200% of
EDF need
• 100% compatible retrofit kit includes:
YY All connection elements for plug and
play without gas removal and re-filling
YY Activated desiccant
YY Retrofit instructions
Existing SF6 gas supervision in EDF breaker
Distribution block
SF6 gas connection-Left SF6 gas connection-Middle SF6 gas connection-Right
Retrofit: External desiccant canister design
Distribution block
Connector to
gas filling port Pressure gauge
Dessicant
container
Clamp
© Copyright 2018 ABB. 1HYR900187-300 - May 2018.
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ABB India Ltd. We reserve the right to make technical We reserve all rights in this document and
High Voltage-Services changes or modify the contents of this in the subject matter and illustrations con-
Maneja Vadodara document without prior notice. With re- tained therein. Any reproduction, disclo-
390 013, Gujrat gard to purchase orders, the agreed par- sure to third parties or utilization of its
ticulars shall prevail. ABB does not accept contents – in whole or in parts – is forbidden
any responsibility whatsoever for potential without prior written consent of ABB.
new.abb.com/high-voltage/ errors or possible lack of information in Copyright© 2018 ABB
service this document. All rights reserved
