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From Minang

Charger : in several UPS systems due to the character of their design another 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 actually the power storage area and is kept charged eith...

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

Charger : in a number of UPS systems as a result of nature of these design a separate battery charger is employed, this is more common on sub 60kVA UPS systems and is very common on small sub 3kVA devices.

Battery : this is the energy storage area and is kept charged both by the rectifier or perhaps a separate charger. Their storage capacity is generally displayed, as AH (ampere hour), which is the amount of amperes of current that the battery can provide for an hour. There will be a quantity of limiting facets dependant on the application, typically if the design calls for a small autonomy (amount of time the battery will support its load for), the batteries could be discharged to a degree, in the case of emergency lighting where there is a need for a autonomy the battery won't be allowed to release 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 load that is in phase with the input mains supply. Due to the number of conversions (ac to dc to ac) and the selection involved it can be termed as a 'clean source.'

Static Switch : this circuit is often as easy as an exchange or maybe more frequently using thyristors, its function would be to change the weight between the inverter and the utility mains supply. As has been mentioned before the output of the inverter is in phase with the utility mains supply to ensure that any switching between your two will undoubtedly be almost seamless. This arrangement means that if the inverter experiences an overload situation, due to its extremely fast over-current discovery circuits it'll move the strain to the more sturdy mains supply. An average example would be when a host tray is switched on, the inrush current, depending upon the size of your uninterruptible power supplies, may cause the transfer to the application mains supply, and after switched on the load may transfer back to the inverter giving the inverter has sufficient ability to support the load. Also a mistake on the inverter can cause the load to be transferred, again virtually seamlessly; it would be unusual for any loss in load to happen during these circumstances.

Maintenance Bypass : more typically present in UPS systems with a volume of 6kVA or greater. The load is allowed by this arrangement to be moved under controlled conditions to the UPS and the utility mains to be power down without damage. Normally performed for routine UPS maintenance or UPS repair.

External Maintenance Bypass : the installation of an maintenance bypass can allow the UPS to be removed/replaced without disturbance to the load, also, if the actual maintenance bypass is fed from a different supply it can allow load screening in the case of a significant UPS fix and/or checking of the autonomy under simulated load problems while the site load has been recognized by the external maintenance bypass circuit. When allowing the UPS System to be bypassed onto standby diesel generator power this is often used. As an alternative, when batteries are removed and changed, it may only be done by setting the uniterruptible power supply into outer bypass.