all three of the phases
The sizes of primary switching center fault interrupters can vary depending on the manufacturer and model. They can range from as small as a few inches to several feet in length, typically matching the size and capacity of the equipment they are designed to protect.
true
The load interrupter switch positions in a primary switching center are typically "closed" when the switch is engaged, allowing electricity to flow, and "open" when the switch is disengaged, cutting off the electricity flow. Some load interrupter switches may also have an "earth" position for grounding purposes.
a primary power buss
15.5kv
six
not required
circuit breaker
A class 3 office
False
sulfur hexafluride SF6
The maximum number of power sources that can be connected to a primary switching center depends on its capacity, design, and configuration. In general, primary switching centers are designed to accommodate multiple power sources to ensure redundancy and reliability in the event of a power failure. It is recommended to consult the specific technical specifications of the switching center for accurate information on the maximum number of power sources it can support.