A general vision of uninterrupted power systems (UPS)
Uninterrupted power systems (UPS)
- An Uninterruptible Power System (UPS) is an electrical device that provides continuous,
- Uninterrupted power to critical alternating current (AC) loads,
- As well as isolation between input and output.
- The battery charger converts the alternating current energy into direct current (DC) energy,
- Supplied to both a battery system and the inverter.
- Converts it from CC to CA supplied to the critical load (s).
UPS Online v / s Off-line
- A true UPS is a constant inline system that means normal operating conditions.
- The flow of energy is through the battery charger and then from the inverter to the load.
- Off-line systems (or stand-by) are designed so that under normal conditions.
- The load is fed directly from the commercial energy source, not through the inverter.
- Depending on the design and the cost
- The voltage can be conditioned by means of a voltage regulating transformer (or a power conditioner),
- Placed in the power circuit between the commercial power source and the load.
- The inverter only supplies power to the load if the power of the network fails
- The batteries take the load of the inverter for a determined period of time (normally 15 to 20 minutes).
- While this topology may be acceptable for some non-critical applications,
- It is unacceptable in process control and power generation applications.
- The commercial or utility network, which supplies AC power to the battery charger.
- DC power and the bypass or alternate which would be another AC source that provides emergency power to the load if the inverter is unable to supply power
- The bypass source also supplies
- AC to DC in the rectifier and then from DC to AC in the inverter.
- Another common term is reverse transfer, which refers to the charge, under certain conditions (such as those described above, such as faults or a manual operation)
- Transferred back to the commercial power source.