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Operation Description
2.7Improper User Operation
See Figures 4 and 5. The
Transfer Operation
Transfer functions require two
The operator should use good judgement when operating the Tie Control. The Tie Control cannot pre- vent an operator from tying to a source that subsequently goes bad.
For example, assume one UPS has gone to bypass. You want to bring the bypass feeder onto the sec- ond system. The second system must momentarily tie to the first system’s bypass source. If a bypass fault occurs in the first system during the tie operation, both load feeders could fault. To prevent this type of fault, put the first system’s bypass source on a standby engine generator.
Tie Operation
The tie process only requires selection of the desired Primary Bypass Source (which may be left in a default desired position) and the sequential pushing of two buttons. The
The sequential operation serves both to eliminate accidental operation and allows the operator an opportunity to cancel an undesired action. Before a transfer or tie operation can be performed the
The OK indicator clearly describes the action which will occur.
If the action indicated is not the desired action, the operator simply presses the button he used to ini- tiate the original operation and the operation is canceled. Directions on how to use the “Push Again to Cancel” feature are posted on the
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