L-Frame Style Retro-fill
Module Style Retro-fill
Important Facts to consider:
- Early model medium voltage circuit breakers from various manufacturers contained asbestos arc chutes
- Some manufacturers also incorporated as many as three mercury-filled switches in their breaker cell design
- Asbestos and mercury are known hazardous materials to humans
- The process of racking a circuit breaker into and out of the connected position is one of the most frequent exercises that expose an operator to risk.
- Supervised, closed door circuit breaker racking is a fundamental recognized safety practice. Furthermore, older breakers are more complex and vulnerable to mechanical failures that create safety problems.
Remote racking limitations
- Some manufacturers have engineered remote racking devices to provide unsupervised, remote connecting and disconnecting of the circuit breaker at some distance from the breaker cell.
- The safety issues of asbestos and mercury exposure during maintenance associated with early vintage medium voltage circuit breakers and circuit breaker cells are not addressed.
- A retro-fill solution removes personnel from exposure to these hazardous substances and provides closed door racking.
Roll-in replacement breakers
- Some owners have identified vertically connected breakers as a potential hazard and are searching for solutions, short of switchgear replacement.
- A breaker retro-fill converts the cell to a horizontal connected breaker, adds newer breaker technology and provides closed door racking.
- Most owners have a wide variety of switchgear in their plants from various manufacturers.
- Recognizing that this variety requires a similar variety of replacement parts, it further complicates maintenance training and can cause confusion.
- Inadequate training and confusion can lead to serious safety issues.
- A retro-fill solution provides a single current production circuit breaker across a variety ABB Inc. in manufacturer’s switchgear.
For more information about Retrofill and Roll-in Replacement Breakers, please contact: www.abb.us/mvservice or call: 1 800 HELP 365 (Option 7) or +1 407 732 2000