It will have its own contacts, microprocessor to analyses the conditions whether power supply is normal or backup and need backup or mains power. Here "back up power" may become either Standby generator or another mains power or static power source like UPS. Transfer to emergency source when voltage on any phase drops to 70 percent or less. Re-transfer to normal when all phase voltages are 90 percent or more.
Adjustable time delay on generator start sequence, 10 seconds maximum, in all second intervals. Adjustable time delay on automatic transfer to normal, 15 to 30 minutes in 1 minute intervals.
If the emergency source fails and power is available from the normal source, the time delay shall be defeated and the transfer operation immediately initiated. Two normally open and two normally closed auxiliary contacts on main shaft. Mounted pilot light to indicate switch in normal position.
Mounted pilot light to indicate switch in emergency position. Engine Starting Contacts. Test switch and necessary equipment for remote test switch.
What is ATS panel generator? What is use of APFC panel? How do automatic transfer switches work? What is DG panel? What is the function of ATS in electrical? What is ATS control panel? How do you synchronize DG sets? How does an emergency generator start automatically? Automatic Operation. How do you make an automatic transfer switch? What is AMF? Similar Asks. What is a function what are the difference between a function declaration and a function definition?
Popular Asks. The new location requirements meant that the existing 3-phase generator had to be modified to support the single-phase load at the new site. The new site conditions meant that the generator also required adaptation to support multiple mains supply. For each mains supply there was the requirement of an automated transfer switch ATS and associated cabling, so the AMF panels can sense mains supply and start the back-up generator, in the event of a failure.
On site, there were two mains supplies to be supported, one of which was split into two, supporting a total of three separate buildings. One AMF was located outside in an IP rated enclosure mounted on a plinth and stand, whilst the other was at high level in the building by the mains header it supported. Smaller and less advanced power generation and distribution systems can contain:. Larger more advanced power generation and distribution systems can contain:.
When utility power is lost, the automatic transfer switch ATS commands generator startup. When the generator is ready, it switches to emergency power. Single Generator Configurations It is important to remember that circuit breakers remain closed until they trip due to an overload or short circuit condition. When power fails:. Multiple Generator Configurations Some sites have buildings that are located far enough apart to prevent paralleling operations during loss of power.
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