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Replacing Tie CB in MTM
- Thread starter anbm
- Start date
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Yes.To replace the Tie breaker in MTM switchgear configuration, I assume both M1 and M2 breakers must be off?
That is why I like the MTTM configuration, as it allows complete isolation of both breakers and cells
How’s about replacing M1, does M2 need to be off or only the poco transformer powers M1 off and Tie CB - M1 connection is open?Yes.
That is why I like the MTTM configuration, as it allows complete isolation of both breakers and cells
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Is this drawout switchgear?How’s about replacing M1, does M2 need to be off or only the poco transformer powers M1 off and Tie CB - M1 connection is open?
If these are hard bussed breakers how many sections separate the main from the Tie? Do you plan to ground the bussing?
Yes, switchgear has all draw out breakers, M1, M2, Tie has its own section, the configuration like this: M1 section, M1-Distribution breaker section, Tie section, M2-Distribution breaker section, M2 section.Is this drawout switchgear?
If these are hard bussed breakers how many sections separate the main from the Tie? Do you plan to ground the bussing?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
If the Tie breaker is removed/racked out many if not most companies consider the sections as being deenergized, except for the section containing the tie breaker and those fed by the closed main. They would allow work in your sections M1 and M1-Distribution.Yes, switchgear has all draw out breakers, M1, M2, Tie has its own section, the configuration like this: M1 section, M1-Distribution breaker section, Tie section, M2-Distribution breaker section, M2 section.