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Charger : in several UPS systems due to the nature of these design a different battery charger is used, this is more common on sub 60kVA UPS systems and is quite common on small sub 3kVA units.

Battery : this is the power storage section and is kept charged eith...

Rectifier : this section of the UPS converts the incoming alternating current (ac) supply to direct current (dc) and provides charging current for the battery and also the supply needs for the inverter.

Charger : in several UPS systems as a result of character of the design a separate battery charger is used, this is more common on sub 60kVA UPS systems and is quite common on small sub 3kVA devices.

Battery : this is the energy storage area and is kept charged both by the rectifier or a separate charger. Its storage capacity is normally shown, as AH (ampere hour), which is the amount of amperes of current that the battery can supply for an hour. There will be a quantity of limiting factors dependant on the application, usually if the design calls for a short autonomy (length of time the battery will support its load for), the batteries could be released to a degree, in the case of emergency lighting where there's a necessity for a autonomy the battery won't be allowed to discharge therefore much. These conditions help permit the maximum design life of the battery to be achieved.

Inverter : an ac output is provided by this section of the Uninterruptible power supply to the weight which can be in phase with the input mains supply. Due to the amount of conversions (ac to dc to ac) and the filter involved it may be referred to as a 'clean supply.'

Fixed Switch : this world can be as easy as an exchange or even more generally using thyristors, its purpose is always to move the weight between the energy mains supply and the inverter. As has been previously mentioned the result of the inverter is in phase with the application mains supply in order that any switching involving the two will be almost seamless. This arrangement means that if the inverter experiences an overload situation, because of its very quickly over-current detection tracks it will transfer force to the more tough mains supply. A normal example would be each time a machine rack is switched on, the inrush current, based upon the size of your uninterruptible power supplies, may cause the transfer to the utility mains offer, and after switched on the load can transfer back to the inverter providing the inverter has sufficient ability to support the load. Also a fault on the inverter can cause the load to be moved, again nearly seamlessly; it would be unusual for just about any lack of load to occur over these conditions.

Maintenance Bypass : more on average present in UPS systems with a volume of 6kVA or greater. This design allows force to be transferred under controlled conditions to the power mains and the UPS to be turn off without damage. Generally completed for routine UPS preservation or UPS restore.

External Maintenance Bypass : the installing of an maintenance bypass can allow the UPS to be removed/replaced without disturbance to the load, also, if the true maintenance bypass is fed from a separate source it can allow load testing in the case of an important UPS repair and/or checking of the independence under simulated load problems while the site load has been supported by the external maintenance bypass circuit. When allowing the UPS System to be bypassed onto standby diesel generator power this is used. Alternatively, when batteries are changed and removed, it can only be done by setting the uniterruptible power supply into outside bypass.