Page last updated Oct 20, 2021 @ 10:08pm
Configuration C
Configuration C is extremely versatile but more costly arrangement for providing power during a blackout. It consists of locating a stationary automatic standby generator unit outside the building and permanently wiring to an automatic transfer switch. This type of system must be installed by an electrician and may require pulling the electric meter. The transfer switch is a double throw switch permanently wired to the building service entrance or sub-panel.
Operation is generally as follows. When power is lost, after a brief delay, the
standby generator automatically starts. When it reaches rated speed and voltage, the
automatic transfer switch connects the building electrical system to the running
generator. Various engine and generator parameters are monitored, along with the
utility feed, and if all remain within specified ranges, the building will continue to be
powered. When the utility feed is restored, the automatic controls will switch the
building back to the utility source after a preset time delay. The generator is then
automatically shutdown after a brief period of no-load operation for engine cool-down.
The automatic controls also are set up to regularly exercise the standby generator set by
starting and running it every few weeks.
- Configuration C1 - all circuits backed by generator
- Configuration C2 - some circuits backed by generator
Configuration C1 is the most straight forward way of implementing a standby automatic generator scheme. All the building circuits are backed by the generator.
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image above to enlarge
Standby Generator Ratings | Matching Items Available for Purchase | ||
Watts | Amps @ 240V single phase |
Standby Generator | Automatic Transfer Switch (rate for larger of genset, panel or service) |
11,000 | 46 | click to go to standby generator catalog | 100A: |
11,500 | 48 | ||
13,000 | 54 | ||
16,000 | 67 | ||
20,000 | 83 | ||
20,000 | 83 | ||
23,000 | 96 | ||
35,000 | 146 | click to go to standby generator catalog |
200A: 400A: |
45,000 | 187 | ||
Larger gensets and 3-phase
models at other voltages are available. If you do not see what you require click here to submit our quote request form. |
Advantages of this configuration include:
Some disadvantages of this arrangement are:
* Non-essential electrical loads that operate from a control circuit sometimes can be automatically shutoff by means of an auxiliary contact on the transfer switch. An example is a central air conditioning system that can be shutdown by wiring an auxiliary contact into the thermostat circuit. When the transfer switch changes from the utility to the generator position the air conditioner will not run, thereby saving on the size and cost of the generator. This auxiliary contact feature is usually available as an optional adder and must be specified when ordering the transfer switch.
Configuration C2 is a more economical way of implementing a standby automatic generator scheme. Only the important building circuits are backed by the generator. This is accomplished by feeding the vital circuits from a separate sub-panel.
Click on thumbnail
image above to enlarge
Standby Generator Ratings | Matching Items Available for Purchase | ||
Watts | Amps @ 240V single phase |
Standby Generator | Automatic Transfer Switch (rate for larger of genset or sub-panel) |
11,000 | 46 | click to go to standby generator catalog | 60A: 100A: |
11,500 | 48 | ||
13,000 | 54 | ||
16,000 | 67 | ||
20,000 | 83 | ||
20,000 | 83 | ||
23,000 | 96 | ||
35,000 | 146 | click to go to standby generator catalog | 100A: |
45,000 | 187 | ||
Larger gensets and 3-phase
models at other voltages are available. If you do not see what you require click here to submit our quote request form. |
Advantages of this configuration include:
Some disadvantages of this arrangement are:
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