INSTALLATION (continued)
Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.
Table C. Maintenance handle positions on
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Transfer Switch | Interlocked Shafts 1 | Interlocked Weights 2 | Maintenance | Shaft Indicators | |
Position | Link between contact | Lobes prevent |
| Handle | |
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| shafts prevents closing | closing both N & E |
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| both N & E contacts | contacts |
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| hub | weight | hub | up |
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E |
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| E = O |
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| upper contacts open | |
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Normal | t | lobe | lobe | up |
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| contact shafts |
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N | link |
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| N = C |
hub |
| hub |
| lower contacts closed | |
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| weight |
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| up |
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E |
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| E = O |
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| upper contacts open | |
Load |
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Disconnected |
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| N = O |
N |
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| lower contacts open | |
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| down |
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E |
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| E = C |
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| down | upper contacts closed | |
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Emergency |
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N |
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| N = O |
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| lower contacts open | |
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| down |
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Note 1: The hub and contact shaft turn in opposite directions through a cam follower mechanism.
Note 2: The hub and contact shaft turn in the same directions.
Note: If Normal and Emergency connections are reversed this operation is also reversed.